fix-redirects.sh: adding forced redirect

Map site root to dc17eu workshop slides
Prepare dc17eu branch
2026-02-15 01:59:57 +00:00 · 2020-04-07 16:48:29 -05:00 · 2017-11-05 09:03:29 -08:00 · 2017-11-05 08:58:58 -08:00
225 changed files with 3369 additions and 14980 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -7,7 +7,4 @@ prepare-vms/ips.pdf
 prepare-vms/settings.yaml
 prepare-vms/tags
 slides/*.yml.html
-slides/autopilot/state.yaml
-slides/index.html
-slides/past.html
-node_modules
+autotest/nextstep
--- a/CHECKLIST.md
+++ b/CHECKLIST.md
@@ -1,24 +0,0 @@
-Checklist to use when delivering a workshop
-Authored by Jérôme; additions by Bridget
-
- [ ] Create event-named branch (such as `conferenceYYYY`) in the [main repo](https://github.com/jpetazzo/container.training/)
-  - [ ] Create file `slides/_redirects` containing a link to the desired tutorial: `/ /kube-halfday.yml.html 200`
-  - [ ] Push local branch to GitHub and merge into main repo
-  - [ ] [Netlify setup](https://app.netlify.com/sites/container-training/settings/domain): create subdomain for event-named branch
- [ ] Add link to event-named branch to [container.training front page](https://github.com/jpetazzo/container.training/blob/master/slides/index.html)
- [ ] Update the slides that says which versions we are using for [kube](https://github.com/jpetazzo/container.training/blob/master/slides/kube/versions-k8s.md) or [swarm](https://github.com/jpetazzo/container.training/blob/master/slides/swarm/versions.md) workshops
- [ ] Update the version of Compose and Machine in [settings](https://github.com/jpetazzo/container.training/tree/master/prepare-vms/settings)
- [ ] (optional) Create chatroom
- [ ] (optional) Set chatroom in YML ([kube half-day example](https://github.com/jpetazzo/container.training/blob/master/slides/kube-halfday.yml#L6-L8)) and deploy
- [ ] (optional) Put chat link on [container.training front page](https://github.com/jpetazzo/container.training/blob/master/slides/index.html)
- [ ] How many VMs do we need? Check with event organizers ahead of time
- [ ] Provision VMs (slightly more than we think we'll need)
- [ ] Change password on presenter's VMs (to forestall any hijinx)
- [ ] Onsite: walk the room to count seats, check power supplies, lectern, A/V setup
- [ ] Print cards
- [ ] Cut cards
- [ ] Last-minute merge from master
- [ ] Check that all looks good
- [ ] DELIVER!
- [ ] Shut down VMs
- [ ] Update index.html to remove chat link and move session to past things
--- a/19
+++ b/19
@@ -1,12 +1,13 @@
-The code in this repository is licensed under the Apache License
-Version 2.0. You may obtain a copy of this license at:
+Copyright 2015 Jérôme Petazzoni
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

-The instructions and slides in this repository (e.g. the files
-with extension .md and .yml in the "slides" subdirectory) are
-under the Creative Commons Attribution 4.0 International Public
-License. You may obtain a copy of this license at:
-
-    https://creativecommons.org/licenses/by/4.0/legalcode
-
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
--- a/README.md
+++ b/README.md
@@ -39,16 +39,14 @@ your own tutorials.
 All these materials have been gathered in a single repository
 because they have a few things in common:

- some [common slides](slides/common/) that are re-used
-  (and updated) identically between different decks;
 - a [build system](slides/) generating HTML slides from
  Markdown source files;
- a [semi-automated test harness](slides/autopilot/) to check
-  that the exercises and examples provided work properly;
- a [PhantomJS script](slides/slidechecker.js) to check
-  that the slides look good and don't have formatting issues;
+- some [common slides](slides/common/) that are re-used
+  (and updated) identically between different decks;
 - [deployment scripts](prepare-vms/) to start training
  VMs in bulk;
+- a [semi-automated test harness](autotest/) to check
+  that the exercises and examples provided work properly;
 - a fancy pipeline powered by
  [Netlify](https://www.netlify.com/) and continuously
  deploying `master` to http://container.training/.
@@ -76,6 +74,9 @@ a few other contributors. It is actively maintained.

 ## Repository structure

+- [autotest](autotest/)
+  - Semi-automated testing system to check that all the exercises
+    in the slides work properly.
 - [bin](bin/)
  - A few helper scripts that you can safely ignore for now.
 - [dockercoins](dockercoins/)
@@ -247,17 +248,6 @@ content but you also know to skip during presentation.
 - Last 15-30 minutes is for stateful services, DAB files, and questions.


-### Pre-built images
-
-There are pre-built images for the 4 components of the DockerCoins demo app: `dockercoins/hasher:v0.1`, `dockercoins/rng:v0.1`, `dockercoins/webui:v0.1`, and `dockercoins/worker:v0.1`. They correspond to the code in this repository.
-
-There are also three variants, for demo purposes:
-
- `dockercoins/rng:v0.2` is broken (the server won't even start),
- `dockercoins/webui:v0.2` has bigger font on the Y axis and a green graph (instead of blue),
- `dockercoins/worker:v0.2` is 11x slower than `v0.1`.
-
-
 ## Past events

 Since its inception, this workshop has been delivered dozens of times,
@@ -292,31 +282,15 @@ If there is a bug and you can't even reproduce it:
 sorry. It is probably an Heisenbug. We can't act on it
 until it's reproducible, alas.

+If you have attended this workshop and have feedback,
+or if you want somebody  to deliver that workshop at your
+conference or for your company: you can contact one of us!

-# “Please teach us!”
-
-If you have attended one of these workshops, and want
-your team or organization to attend a similar one, you
-can look at the list of upcoming events on
-http://container.training/.
-
-You are also welcome to reuse these materials to run
-your own workshop, for your team or even at a meetup
-or conference. In that case, you might enjoy watching
-[Bridget Kromhout's talk at KubeCon 2018 Europe](
-https://www.youtube.com/watch?v=mYsp_cGY2O0), explaining
-precisely how to run such a workshop yourself.
-
-Finally, you can also contact the following persons,
-who are experienced speakers, are familiar with the
-material, and are available to deliver these workshops
-at your conference or for your company:
-
- jerome dot petazzoni at gmail dot com
+- jerome at docker dot com
 - bret at bretfisher dot com

-(If you are willing and able to deliver such workshops,
-feel free to submit a PR to add your name to that list!)
+If you are willing and able to deliver such workshops,
+feel free to submit a PR to add your name to that list!

 **Thank you!**

--- a/autotest/autotest.py
+++ b/autotest/autotest.py
@@ -0,0 +1,229 @@
+#!/usr/bin/env python
+
+import uuid
+import logging
+import os
+import re
+import subprocess
+import sys
+import time
+import uuid
+
+logging.basicConfig(level=logging.DEBUG)
+
+
+TIMEOUT = 60 # 1 minute
+
+
+def hrule():
+    return "="*int(subprocess.check_output(["tput", "cols"]))
+
+# A "snippet" is something that the user is supposed to do in the workshop.
+# Most of the "snippets" are shell commands.
+# Some of them can be key strokes or other actions.
+# In the markdown source, they are the code sections (identified by triple-
+# quotes) within .exercise[] sections.
+
+class Snippet(object):
+
+    def __init__(self, slide, content):
+        self.slide = slide
+        self.content = content
+        self.actions = []
+
+    def __str__(self):
+        return self.content
+
+
+class Slide(object):
+
+    current_slide = 0
+
+    def __init__(self, content):
+        Slide.current_slide += 1
+        self.number = Slide.current_slide
+
+        # Remove commented-out slides
+        # (remark.js considers ??? to be the separator for speaker notes)
+        content = re.split("\n\?\?\?\n", content)[0]
+        self.content = content
+
+        self.snippets = []
+        exercises = re.findall("\.exercise\[(.*)\]", content, re.DOTALL)
+        for exercise in exercises:
+            if "```" in exercise:
+                for snippet in exercise.split("```")[1::2]:
+                    self.snippets.append(Snippet(self, snippet))
+            else:
+                logging.warning("Exercise on slide {} does not have any ``` snippet."
+                                .format(self.number))
+                self.debug()
+
+    def __str__(self):
+        text = self.content
+        for snippet in self.snippets:
+            text = text.replace(snippet.content, ansi("7")(snippet.content))
+        return text
+
+    def debug(self):
+        logging.debug("\n{}\n{}\n{}".format(hrule(), self.content, hrule()))
+
+
+def ansi(code):
+    return lambda s: "\x1b[{}m{}\x1b[0m".format(code, s)
+
+
+def wait_for_string(s):
+    logging.debug("Waiting for string: {}".format(s))
+    deadline = time.time() + TIMEOUT
+    while time.time() < deadline:
+        output = capture_pane()
+        if s in output:
+            return
+        time.sleep(1)
+    raise Exception("Timed out while waiting for {}!".format(s))
+
+
+def wait_for_prompt():
+    logging.debug("Waiting for prompt.")
+    deadline = time.time() + TIMEOUT
+    while time.time() < deadline:
+        output = capture_pane()
+        # If we are not at the bottom of the screen, there will be a bunch of extra \n's
+        output = output.rstrip('\n')
+        if output[-2:] == "\n$":
+            return
+        time.sleep(1)
+    raise Exception("Timed out while waiting for prompt!")
+
+
+def check_exit_status():
+    token = uuid.uuid4().hex
+    data = "echo {} $?\n".format(token)
+    logging.debug("Sending {!r} to get exit status.".format(data))
+    send_keys(data)
+    time.sleep(0.5)
+    wait_for_prompt()
+    screen = capture_pane()
+    status = re.findall("\n{} ([0-9]+)\n".format(token), screen, re.MULTILINE)
+    logging.debug("Got exit status: {}.".format(status))
+    if len(status) == 0:
+        raise Exception("Couldn't retrieve status code {}. Timed out?".format(token))
+    if len(status) > 1:
+        raise Exception("More than one status code {}. I'm seeing double! Shoot them both.".format(token))
+    code = int(status[0])
+    if code != 0:
+        raise Exception("Non-zero exit status: {}.".format(code))
+    # Otherwise just return peacefully.
+
+
+slides = []
+content = open(sys.argv[1]).read()
+for slide in re.split("\n---?\n", content):
+    slides.append(Slide(slide))
+
+actions = []
+for slide in slides:
+    for snippet in slide.snippets:
+        content = snippet.content
+        # Extract the "method" (e.g. bash, keys, ...)
+        # On multi-line snippets, the method is alone on the first line
+        # On single-line snippets, the data follows the method immediately
+        if '\n' in content:
+            method, data = content.split('\n', 1)
+        else:
+            method, data = content.split(' ', 1)
+        actions.append((slide, snippet, method, data))
+
+
+def send_keys(data):
+    subprocess.check_call(["tmux", "send-keys", data])
+
+def capture_pane():
+    return subprocess.check_output(["tmux", "capture-pane", "-p"])
+
+
+try:
+    i = int(open("nextstep").read())
+    logging.info("Loaded next step ({}) from file.".format(i))
+except Exception as e:
+    logging.warning("Could not read nextstep file ({}), initializing to 0.".format(e))
+    i = 0
+
+interactive = True
+
+while i < len(actions):
+    with open("nextstep", "w") as f:
+        f.write(str(i))
+    slide, snippet, method, data = actions[i]
+
+    # Remove extra spaces (we don't want them in the terminal) and carriage returns
+    data = data.strip()
+
+    print(hrule())
+    print(slide.content.replace(snippet.content, ansi(7)(snippet.content)))
+    print(hrule())
+    if interactive:
+        print("[{}/{}] Shall we execute that snippet above?".format(i, len(actions)))
+        print("(ENTER to execute, 'c' to continue until next error, N to jump to step #N)")
+        command = raw_input("> ")
+    else:
+        command = ""
+
+    # For now, remove the `highlighted` sections
+    # (Make sure to use $() in shell snippets!)
+    if '`' in data:
+        logging.info("Stripping ` from snippet.")
+        data = data.replace('`', '')
+
+    if command == "c":
+        # continue until next timeout
+        interactive = False
+    elif command.isdigit():
+        i = int(command)
+    elif command == "":
+        logging.info("Running with method {}: {}".format(method, data))
+        if method == "keys":
+            send_keys(data)
+        elif method == "bash":
+            # Make sure that we're ready
+            wait_for_prompt()
+            # Strip leading spaces
+            data = re.sub("\n +", "\n", data)
+            # Add "RETURN" at the end of the command :)
+            data += "\n"
+            # Send command
+            send_keys(data)
+            # Force a short sleep to avoid race condition
+            time.sleep(0.5)
+            _, _, next_method, next_data = actions[i+1]
+            if next_method == "wait":
+                wait_for_string(next_data)
+            else:
+                wait_for_prompt()
+                # Verify return code FIXME should be optional
+                check_exit_status()
+        elif method == "copypaste":
+            screen = capture_pane()
+            matches = re.findall(data, screen, flags=re.DOTALL)
+            if len(matches) == 0:
+                raise Exception("Could not find regex {} in output.".format(data))
+            # Arbitrarily get the most recent match
+            match = matches[-1]
+            # Remove line breaks (like a screen copy paste would do)
+            match = match.replace('\n', '')
+            send_keys(match + '\n')
+            # FIXME: we should factor out the "bash" method
+            wait_for_prompt()
+            check_exit_status()
+        else:
+            logging.warning("Unknown method {}: {!r}".format(method, data))
+        i += 1
+
+    else:
+        i += 1
+        logging.warning("Unknown command {}, skipping to next step.".format(command))
+
+# Reset slide counter
+with open("nextstep", "w") as f:
+    f.write(str(0))
--- a/dockercoins/rng/rng.py
+++ b/dockercoins/rng/rng.py
@@ -28,5 +28,5 @@ def rng(how_many_bytes):


 if __name__ == "__main__":
-    app.run(host="0.0.0.0", port=80, threaded=False)
+    app.run(host="0.0.0.0", port=80)

--- a/prepare-vms/README.md
+++ b/prepare-vms/README.md
@@ -1,22 +1,15 @@
-# Trainer tools to create and prepare VMs for Docker workshops on AWS or Azure
+# Trainer tools to create and prepare VMs for Docker workshops on AWS

 ## Prerequisites

 - [Docker](https://docs.docker.com/engine/installation/)
 - [Docker Compose](https://docs.docker.com/compose/install/)
- [Parallel SSH](https://code.google.com/archive/p/parallel-ssh/) (on a Mac: `brew install pssh`) - the configuration scripts require this
-
-And if you want to generate printable cards:
-
- [pyyaml](https://pypi.python.org/pypi/PyYAML) (on a Mac: `brew install pyyaml`)
- [jinja2](https://pypi.python.org/pypi/Jinja2) (on a Mac: `brew install jinja2`)

 ## General Workflow

 - fork/clone repo
- set required environment variables
+- set required environment variables for AWS
 - create your own setting file from `settings/example.yaml`
- if necessary, increase allowed open files: `ulimit -Sn 10000`
 - run `./workshopctl` commands to create instances, install docker, setup each users environment in node1, other management tasks
 - run `./workshopctl cards` command to generate PDF for printing handouts of each users host IP's and login info

@@ -42,16 +35,6 @@ The Docker Compose file here is used to build a image with all the dependencies
 - `AWS_SECRET_ACCESS_KEY`
 - `AWS_DEFAULT_REGION`

-If you're not using AWS, set these to placeholder values:
-
-```
-export AWS_ACCESS_KEY_ID="foo"
-export AWS_SECRET_ACCESS_KEY="foo"
-export AWS_DEFAULT_REGION="foo"
-```
-
-If you don't have the `aws` CLI installed, you will get a warning that it's a missing dependency. If you're not using AWS you can ignore this.
-
 ### Update/copy `settings/example.yaml`

 Then pass `settings/YOUR_WORKSHOP_NAME-settings.yaml` as an argument to `./workshopctl deploy`, `./workshopctl cards`, etc.
@@ -65,7 +48,6 @@ workshopctl - the orchestration workshop swiss army knife
 Commands:
 ami          Show the AMI that will be used for deployment
 amis         List Ubuntu AMIs in the current region
-build        Build the Docker image to run this program in a container
 cards        Generate ready-to-print cards for a batch of VMs
 deploy       Install Docker on a bunch of running VMs
 ec2quotas    Check our EC2 quotas (max instances)
@@ -73,7 +55,6 @@ help         Show available commands
 ids          List the instance IDs belonging to a given tag or token
 ips          List the IP addresses of the VMs for a given tag or token
 kube         Setup kubernetes clusters with kubeadm (must be run AFTER deploy)
-kubetest     Check that all notes are reporting as Ready
 list         List available batches in the current region
 opensg       Open the default security group to ALL ingress traffic
 pull_images  Pre-pull a bunch of Docker images
@@ -82,7 +63,6 @@ start        Start a batch of VMs
 status       List instance status for a given batch
 stop         Stop (terminate, shutdown, kill, remove, destroy...) instances
 test         Run tests (pre-flight checks) on a batch of VMs
-wrap         Run this program in a container
 ```

 ### Summary of What `./workshopctl` Does For You
@@ -95,80 +75,19 @@ wrap         Run this program in a container
 - During `start` it will add your default local SSH key to all instances under the `ubuntu` user.
 - During `deploy` it will create the `docker` user with password `training`, which is printing on the cards for students. For now, this is hard coded.

-### Example Steps to Launch a Batch of AWS Instances for a Workshop
+### Example Steps to Launch a Batch of Instances for a Workshop

 - Run `./workshopctl start N` Creates `N` EC2 instances
  - Your local SSH key will be synced to instances under `ubuntu` user
  - AWS instances will be created and tagged based on date, and IP's stored in `prepare-vms/tags/`
- Run `./workshopctl deploy TAG settings/somefile.yaml` to run `lib/postprep.py` via parallel-ssh
+- Run `./workshopctl deploy TAG settings/somefile.yaml` to run `scripts/postprep.rc` via parallel-ssh
  - If it errors or times out, you should be able to rerun
  - Requires good connection to run all the parallel SSH connections, up to 100 parallel (ProTip: create dedicated management instance in same AWS region where you run all these utils from)
- Run `./workshopctl pull_images TAG` to pre-pull a bunch of Docker images to the instances
+- Run `./workshopctl pull-images TAG` to pre-pull a bunch of Docker images to the instances
 - Run `./workshopctl cards TAG settings/somefile.yaml` generates PDF/HTML files to print and cut and hand out to students
 - *Have a great workshop*
 - Run `./workshopctl stop TAG` to terminate instances.

-### Example Steps to Launch Azure Instances
-
- Install the [Azure CLI](https://docs.microsoft.com/en-us/cli/azure/install-azure-cli?view=azure-cli-latest) and authenticate with a valid account
- Customize `azuredeploy.parameters.json`
-  - Required:
-    - Provide the SSH public key you plan to use for instance configuration
-  - Optional:
-    - Choose a name for the workshop (default is "workshop")
-    - Choose the number of instances (default is 3)
-    - Customize the desired instance size (default is Standard_D1_v2)
- - Launch instances with your chosen resource group name and your preferred region; the examples are "workshop" and "eastus":
-```
-az group create --name workshop --location eastus
-az group deployment create --resource-group workshop --template-file azuredeploy.json --parameters @azuredeploy.parameters.json
-```
-
-The `az group deployment create` command can take several minutes and will only say `- Running ..` until it completes, unless you increase the verbosity with `--verbose` or `--debug`.
-
-To display the IPs of the instances you've launched:
-
-```
-az vm list-ip-addresses --resource-group workshop --output table
-```
-
-If you want to put the IPs into `prepare-vms/tags/<tag>/ips.txt` for a tag of "myworkshop":
-
-1) If you haven't yet installed `jq` and/or created your event's tags directory in `prepare-vms`:
-
-```
-brew install jq
-mkdir -p tags/myworkshop
-```
-
-2) And then generate the IP list:
-
-```
-az vm list-ip-addresses --resource-group workshop --output json | jq -r '.[].virtualMachine.network.publicIpAddresses[].ipAddress' > tags/myworkshop/ips.txt
-```
-
-After the workshop is over, remove the instances:
-
-```
-az group delete --resource-group workshop
-```
-
-### Example Steps to Configure Instances from a non-AWS Source
-
- Launch instances via your preferred method. You'll need to get the instance IPs and be able to ssh into them.
- Set placeholder values for [AWS environment variable settings](#required-environment-variables).
- Choose a tag. It could be an event name, datestamp, etc. Ensure you have created a directory for your tag: `prepare-vms/tags/<tag>/`
- If you have not already generated a file with the IPs to be configured:
-  - The file should be named `prepare-vms/tags/<tag>/ips.txt`
-  - Format is one IP per line, no other info needed.
- Ensure the settings file is as desired (especially the number of nodes): `prepare-vms/settings/kube101.yaml`
- For a tag called `myworkshop`, configure instances: `workshopctl deploy myworkshop settings/kube101.yaml`
- Optionally, configure Kubernetes clusters of the size in the settings: `workshopctl kube myworkshop`
- Optionally, test your Kubernetes clusters. They may take a little time to become ready: `workshopctl kubetest myworkshop`
- Generate cards to print and hand out: `workshopctl cards myworkshop settings/kube101.yaml`
- Print the cards file: `prepare-vms/tags/myworkshop/ips.html`
-
-
 ## Other Tools

 ### Deploying your SSH key to all the machines
@@ -178,6 +97,13 @@ az group delete --resource-group workshop
 - Run `pcopykey`.


+### Installing extra packages
+
+- Source `postprep.rc`.
+  (This will install a few extra packages, add entries to
+  /etc/hosts, generate SSH keys, and deploy them on all hosts.)
+
+
 ## Even More Details

 #### Sync of SSH keys
@@ -206,20 +132,16 @@ Instances can be deployed manually using the `deploy` command:

    $ ./workshopctl deploy TAG settings/somefile.yaml

-The `postprep.py` file will be copied via parallel-ssh to all of the VMs and executed.
+The `postprep.rc` file will be copied via parallel-ssh to all of the VMs and executed.

 #### Pre-pull images

-    $ ./workshopctl pull_images TAG
+    $ ./workshopctl pull-images TAG

 #### Generate cards

    $ ./workshopctl cards TAG settings/somefile.yaml

-If you want to generate both HTML and PDF cards, install [wkhtmltopdf](https://wkhtmltopdf.org/downloads.html); without that installed, only HTML cards will be generated.
-
-If you don't have `wkhtmltopdf` installed, you will get a warning that it is a missing dependency. If you plan to just print the HTML cards, you can ignore this.
-
 #### List tags

    $ ./workshopctl list
--- a/prepare-vms/azuredeploy.json
+++ b/prepare-vms/azuredeploy.json
@@ -1,250 +0,0 @@
-{
-  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
-  "contentVersion": "1.0.0.0",
-  "parameters": {
-    "workshopName": {
-      "type": "string",
-      "defaultValue": "workshop",
-      "metadata": {
-        "description": "Workshop name."
-      }
-    },
-    "vmPrefix": {
-      "type": "string",
-      "defaultValue": "node",
-      "metadata": {
-        "description": "Prefix for VM names."
-      }
-    },
-    "numberOfInstances": {
-      "type": "int",
-      "defaultValue": 3,
-      "metadata": {
-        "description": "Number of VMs to create."
-      }
-    },
-    "adminUsername": {
-      "type": "string",
-      "defaultValue": "ubuntu",
-      "metadata": {
-        "description": "Admin username for VMs."
-      }
-    },
-    "sshKeyData": {
-      "type": "string",
-      "defaultValue": "",
-      "metadata": {
-        "description": "SSH rsa public key file as a string."
-      }
-    },
-    "imagePublisher": {
-      "type": "string",
-      "defaultValue": "Canonical",
-      "metadata": {
-        "description": "OS image publisher; default Canonical."
-      }
-    },
-    "imageOffer": {
-      "type": "string",
-      "defaultValue": "UbuntuServer",
-      "metadata": {
-        "description": "The name of the image offer. The default is Ubuntu"
-      }
-    },
-    "imageSKU": {
-      "type": "string",
-      "defaultValue": "16.04-LTS",
-      "metadata": {
-        "description": "Version of the image. The default is 16.04-LTS"
-      }
-    },
-    "vmSize": {
-      "type": "string",
-      "defaultValue": "Standard_D1_v2",
-      "metadata": {
-        "description": "VM Size."
-      }
-    }
-  },
-  "variables": {
-    "vnetID": "[resourceId('Microsoft.Network/virtualNetworks',variables('virtualNetworkName'))]",
-    "subnet1Ref": "[concat(variables('vnetID'),'/subnets/',variables('subnet1Name'))]",
-    "vmName": "[parameters('vmPrefix')]",
-    "sshKeyPath": "[concat('/home/',parameters('adminUsername'),'/.ssh/authorized_keys')]",
-    "publicIPAddressName": "PublicIP",
-    "publicIPAddressType": "Dynamic",
-    "virtualNetworkName": "MyVNET",
-    "netSecurityGroup": "MyNSG",
-    "addressPrefix": "10.0.0.0/16",
-    "subnet1Name": "subnet-1",
-    "subnet1Prefix": "10.0.0.0/24",
-    "nicName": "myVMNic"
-  },
-  "resources": [
-    {
-      "apiVersion": "2017-11-01",
-      "type": "Microsoft.Network/publicIPAddresses",
-      "name": "[concat(variables('publicIPAddressName'),copyIndex(1))]",
-      "location": "[resourceGroup().location]",
-      "copy": {
-        "name": "publicIPLoop",
-        "count": "[parameters('numberOfInstances')]"
-      },
-      "properties": {
-        "publicIPAllocationMethod": "[variables('publicIPAddressType')]"
-      },
-      "tags": {
-        "workshop": "[parameters('workshopName')]"
-      }
-    },
-    {
-      "apiVersion": "2017-11-01",
-      "type": "Microsoft.Network/virtualNetworks",
-      "name": "[variables('virtualNetworkName')]",
-      "location": "[resourceGroup().location]",
-      "dependsOn": [
-        "[concat('Microsoft.Network/networkSecurityGroups/', variables('netSecurityGroup'))]"
-      ],
-      "properties": {
-        "addressSpace": {
-          "addressPrefixes": [
-            "[variables('addressPrefix')]"
-          ]
-        },
-        "subnets": [
-          {
-            "name": "[variables('subnet1Name')]",
-            "properties": {
-              "addressPrefix": "[variables('subnet1Prefix')]",
-              "networkSecurityGroup": {
-                "id": "[resourceId('Microsoft.Network/networkSecurityGroups', variables('netSecurityGroup'))]"
-              }
-            }
-          }
-        ]
-      },
-      "tags": {
-        "workshop": "[parameters('workshopName')]"
-      }
-    },
-    {
-      "apiVersion": "2017-11-01",
-      "type": "Microsoft.Network/networkInterfaces",
-      "name": "[concat(variables('nicName'),copyIndex(1))]",
-      "location": "[resourceGroup().location]",
-      "copy": {
-        "name": "nicLoop",
-        "count": "[parameters('numberOfInstances')]"
-      },
-      "dependsOn": [
-        "[concat('Microsoft.Network/publicIPAddresses/', variables('publicIPAddressName'),copyIndex(1))]",
-        "[concat('Microsoft.Network/virtualNetworks/', variables('virtualNetworkName'))]"
-      ],
-      "properties": {
-        "ipConfigurations": [
-          {
-            "name": "ipconfig1",
-            "properties": {
-              "privateIPAllocationMethod": "Dynamic",
-              "publicIPAddress": {
-                "id": "[resourceId('Microsoft.Network/publicIPAddresses', concat(variables('publicIPAddressName'), copyIndex(1)))]"
-              },
-              "subnet": {
-                "id": "[variables('subnet1Ref')]"
-              }
-            }
-          }
-        ]
-      },
-      "tags": {
-        "workshop": "[parameters('workshopName')]"
-      }
-    },
-    {
-      "apiVersion": "2017-12-01",
-      "type": "Microsoft.Compute/virtualMachines",
-      "name": "[concat(variables('vmName'),copyIndex(1))]",
-      "location": "[resourceGroup().location]",
-      "copy": {
-        "name": "vmLoop",
-        "count": "[parameters('numberOfInstances')]"
-      },
-      "dependsOn": [
-        "[concat('Microsoft.Network/networkInterfaces/', variables('nicName'), copyIndex(1))]"
-      ],
-      "properties": {
-        "hardwareProfile": {
-          "vmSize": "[parameters('vmSize')]"
-        },
-        "osProfile": {
-          "computerName": "[concat(variables('vmName'),copyIndex(1))]",
-          "adminUsername": "[parameters('adminUsername')]",
-          "linuxConfiguration": {
-            "disablePasswordAuthentication": true,
-            "ssh": {
-              "publicKeys": [
-                {
-                  "path": "[variables('sshKeyPath')]",
-                  "keyData": "[parameters('sshKeyData')]"
-                }
-              ]
-            }
-          }
-        },
-        "storageProfile": {
-          "osDisk": {
-            "createOption": "FromImage"
-          },
-          "imageReference": {
-            "publisher": "[parameters('imagePublisher')]",
-            "offer": "[parameters('imageOffer')]",
-            "sku": "[parameters('imageSKU')]",
-            "version": "latest"
-          }
-        },
-        "networkProfile": {
-          "networkInterfaces": [
-            {
-              "id": "[resourceId('Microsoft.Network/networkInterfaces', concat(variables('nicName'),copyIndex(1)))]"
-            }
-          ]
-        }
-      },
-      "tags": {
-        "workshop": "[parameters('workshopName')]"
-      }
-    },
-    {
-      "apiVersion": "2017-11-01",
-      "type": "Microsoft.Network/networkSecurityGroups",
-      "name": "[variables('netSecurityGroup')]",
-      "location": "[resourceGroup().location]",
-      "tags": {
-        "workshop": "[parameters('workshopName')]"
-      },
-      "properties": {
-        "securityRules": [
-          {
-            "name": "default-open-ports",
-            "properties": {
-              "protocol": "Tcp",
-              "sourcePortRange": "*",
-              "destinationPortRange": "*",
-              "sourceAddressPrefix": "*",
-              "destinationAddressPrefix": "*",
-              "access": "Allow",
-              "priority": 1000,
-              "direction": "Inbound"
-            }
-          }
-        ]
-      }
-    }
-  ],
-  "outputs": {
-    "resourceID": {
-      "type": "string",
-      "value": "[resourceId('Microsoft.Network/publicIPAddresses', concat(variables('publicIPAddressName'),'1'))]"
-    }
-  }
-}
--- a/prepare-vms/azuredeploy.parameters.json
+++ b/prepare-vms/azuredeploy.parameters.json
@@ -1,18 +0,0 @@
-{
-  "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentParameters.json#",
-  "contentVersion": "1.0.0.0",
-  "parameters": {
-    "sshKeyData": {
-      "value": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDXTIl/M9oeSlcsC5Rfe+nZr4Jc4sl200pSw2lpdxlZ3xzeP15NgSSMJnigUrKUXHfqRQ+2wiPxEf0Odz2GdvmXvR0xodayoOQsO24AoERjeSBXCwqITsfp1bGKzMb30/3ojRBo6LBR6r1+lzJYnNCGkT+IQwLzRIpm0LCNz1j08PUI2aZ04+mcDANvHuN/hwi/THbLLp6SNWN43m9r02RcC6xlCNEhJi4wk4VzMzVbSv9RlLGST2ocbUHwmQ2k9OUmpzoOx73aQi9XNnEaFh2w/eIdXM75VtkT3mRryyykg9y0/hH8/MVmIuRIdzxHQqlm++DLXVH5Ctw6a4kS+ki7 workshop"
-      },
-    "workshopName": {
-      "value": "workshop"
-    },
-    "numberOfInstances": {
-      "value": 3
-    },
-    "vmSize": {
-      "value": "Standard_D1_v2"
-    }
-  }
-}
--- a/prepare-vms/cards.html
+++ b/prepare-vms/cards.html
@@ -12,9 +12,7 @@
    {%- set cluster_or_machine = "cluster" -%}
    {%- set this_or_each = "each" -%}
    {%- set machine_is_or_machines_are = "machines are" -%}
-    {%- set image_src_swarm = "https://cdn.wp.nginx.com/wp-content/uploads/2016/07/docker-swarm-hero2.png" -%}
-    {%- set image_src_kube = "https://avatars1.githubusercontent.com/u/13629408" -%}
-    {%- set image_src = image_src_swarm -%}
+    {%- set image_src = "https://cdn.wp.nginx.com/wp-content/uploads/2016/07/docker-swarm-hero2.png" -%}
 {%- endif -%}
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
--- a/prepare-vms/clusters.csv
+++ b/prepare-vms/clusters.csv
@@ -1,5 +0,0 @@
-Put your initials in the first column to "claim" a cluster.
-Initials{% for node in clusters[0] %}	node{{ loop.index }}{% endfor %}
-{% for cluster in clusters -%}
-  {%- for node in cluster %}	{{ node|trim }}{% endfor %}
-{% endfor %}
--- a/prepare-vms/cncsetup.sh
+++ b/prepare-vms/cncsetup.sh
@@ -1,21 +0,0 @@
-#!/bin/sh
-if [ $(whoami) != ubuntu ]; then
-  echo "This script should be executed on a freshly deployed node,"
-  echo "with the 'ubuntu' user. Aborting."
-  exit 1
-fi
-if id docker; then
-  sudo userdel -r docker
-fi
-pip install --user awscli jinja2 pdfkit
-sudo apt-get install -y wkhtmltopdf xvfb
-tmux new-session \; send-keys "
-[ -f ~/.ssh/id_rsa ] || ssh-keygen
-
-eval \$(ssh-agent)
-ssh-add
-Xvfb :0 &
-export DISPLAY=:0
-mkdir -p ~/www
-sudo docker run -d -p 80:80 -v \$HOME/www:/usr/share/nginx/html nginx
-"
--- a/prepare-vms/docker-compose.yml
+++ b/prepare-vms/docker-compose.yml
@@ -7,6 +7,7 @@ services:
        working_dir: /root/prepare-vms
        volumes:
            - $HOME/.aws/:/root/.aws/
+            - /etc/localtime:/etc/localtime:ro
            - $SSH_AUTH_SOCK:$SSH_AUTH_SOCK
            - $PWD/:/root/prepare-vms/
        environment:
@@ -14,6 +15,5 @@ services:
            AWS_ACCESS_KEY_ID: ${AWS_ACCESS_KEY_ID}
            AWS_SECRET_ACCESS_KEY: ${AWS_SECRET_ACCESS_KEY}
            AWS_DEFAULT_REGION: ${AWS_DEFAULT_REGION}
-            AWS_INSTANCE_TYPE: ${AWS_INSTANCE_TYPE}
            USER: ${USER}
        entrypoint: /root/prepare-vms/workshopctl
--- a/prepare-vms/lib/cli.sh
+++ b/prepare-vms/lib/cli.sh
@@ -2,7 +2,7 @@
 _ERR() {
    error "Command $BASH_COMMAND failed (exit status: $?)"
 }
-set -eE
+set -e
 trap _ERR ERR

 die() {
--- a/prepare-vms/lib/commands.sh
+++ b/prepare-vms/lib/commands.sh
@@ -39,16 +39,13 @@ _cmd_cards() {
    need_tag $TAG
    need_settings $SETTINGS

-    # If you're not using AWS, populate the ips.txt file manually
-    if [ ! -f tags/$TAG/ips.txt ]; then
-      aws_get_instance_ips_by_tag $TAG >tags/$TAG/ips.txt
-    fi
+    aws_get_instance_ips_by_tag $TAG >tags/$TAG/ips.txt

    # Remove symlinks to old cards
    rm -f ips.html ips.pdf

    # This will generate two files in the base dir: ips.pdf and ips.html
-    lib/ips-txt-to-html.py $SETTINGS
+    python lib/ips-txt-to-html.py $SETTINGS

    for f in ips.html ips.pdf; do
        # Remove old versions of cards if they exist
@@ -127,21 +124,27 @@ _cmd kube "Setup kubernetes clusters with kubeadm (must be run AFTER deploy)"
 _cmd_kube() {

    # Install packages
-    pssh --timeout 200 "
+    pssh "
    curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg |
    sudo apt-key add - &&
    echo deb http://apt.kubernetes.io/ kubernetes-xenial main |
    sudo tee /etc/apt/sources.list.d/kubernetes.list"
-    pssh --timeout 200 "
+    pssh "
    sudo apt-get update -q &&
    sudo apt-get install -qy kubelet kubeadm kubectl
    kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl"

+    # Work around https://github.com/kubernetes/kubernetes/issues/53356
+    pssh "
+    if [ ! -f /etc/kubernetes/kubelet.conf ]; then
+        sudo systemctl stop kubelet
+        sudo rm -rf /var/lib/kubelet/pki
+    fi"
+
    # Initialize kube master
-    pssh --timeout 200 "
+    pssh "
    if grep -q node1 /tmp/node && [ ! -f /etc/kubernetes/admin.conf ]; then
-        kubeadm token generate > /tmp/token
-	sudo kubeadm init --token \$(cat /tmp/token)
+        sudo kubeadm init
    fi"

    # Put kubeconfig in ubuntu's and docker's accounts
@@ -154,6 +157,15 @@ _cmd_kube() {
        sudo chown -R docker /home/docker/.kube
    fi"

+    # Get bootstrap token
+    pssh "
+    if grep -q node1 /tmp/node; then
+        TOKEN_NAME=\$(kubectl -n kube-system get secret -o name | grep bootstrap-token)
+        TOKEN_ID=\$(kubectl -n kube-system get \$TOKEN_NAME -o go-template --template '{{ index .data \"token-id\" }}' | base64 -d)
+        TOKEN_SECRET=\$(kubectl -n kube-system get \$TOKEN_NAME -o go-template --template '{{ index .data \"token-secret\" }}' | base64 -d)
+        echo \$TOKEN_ID.\$TOKEN_SECRET >/tmp/token
+    fi"
+
    # Install weave as the pod network
    pssh "
    if grep -q node1 /tmp/node; then
@@ -162,30 +174,15 @@ _cmd_kube() {
    fi"

    # Join the other nodes to the cluster
-    pssh --timeout 200 "
+    pssh "
    if ! grep -q node1 /tmp/node && [ ! -f /etc/kubernetes/kubelet.conf ]; then
        TOKEN=\$(ssh -o StrictHostKeyChecking=no node1 cat /tmp/token)
-        sudo kubeadm join --discovery-token-unsafe-skip-ca-verification --token \$TOKEN node1:6443
+        sudo kubeadm join --token \$TOKEN node1:6443
    fi"

    sep "Done"
 }

-_cmd kubetest "Check that all notes are reporting as Ready"
-_cmd_kubetest() {
-    # There are way too many backslashes in the command below.
-    # Feel free to make that better ♥
-    pssh "
-    set -e
-    [ -f /tmp/node ]
-    if grep -q node1 /tmp/node; then
-      which kubectl
-      for NODE in \$(awk /\ node/\ {print\ \\\$2} /etc/hosts); do
-        echo \$NODE ; kubectl get nodes | grep -w \$NODE | grep -w Ready
-      done
-    fi"
-}
-
 _cmd ids "List the instance IDs belonging to a given tag or token"
 _cmd_ids() {
    TAG=$1
@@ -283,9 +280,6 @@ _cmd_start() {
    key_name=$(sync_keys)

    AMI=$(_cmd_ami)    # Retrieve the AWS image ID
-    if [ -z "$AMI" ]; then
-        die "I could not find which AMI to use in this region. Try another region?"
-    fi
    TOKEN=$(get_token) # generate a timestamp token for this batch of VMs
    AWS_KEY_NAME=$(make_key_name)

@@ -298,7 +292,7 @@ _cmd_start() {
    result=$(aws ec2 run-instances \
        --key-name $AWS_KEY_NAME \
        --count $COUNT \
-        --instance-type ${AWS_INSTANCE_TYPE-t2.medium} \
+        --instance-type t2.medium \
        --client-token $TOKEN \
        --image-id $AMI)
    reservation_id=$(echo "$result" | head -1 | awk '{print $2}')
@@ -393,23 +387,9 @@ pull_tag() {
            ubuntu:latest \
            fedora:latest \
            centos:latest \
-	    elasticsearch:2 \
            postgres \
            redis \
-	    alpine \
-	    registry \
-	    nicolaka/netshoot \
-	    jpetazzo/trainingwheels \
-	    golang \
            training/namer \
-	    dockercoins/hasher \
-	    dockercoins/rng \
-	    dockercoins/webui \
-	    dockercoins/worker \
-	    logstash \
-	    prom/node-exporter \
-	    google/cadvisor \
-	    dockersamples/visualizer \
            nathanleclaire/redisonrails; do
        sudo -u docker docker pull $I
    done'
@@ -450,7 +430,6 @@ tag_is_reachable() {
 }

 test_tag() {
-    TAG=$1
    ips_file=tags/$TAG/ips.txt
    info "Picking a random IP address in $ips_file to run tests."
    n=$((1 + $RANDOM % $(wc -l <$ips_file)))
--- a/prepare-vms/lib/postprep.py
+++ b/prepare-vms/lib/postprep.py
@@ -45,7 +45,7 @@ def system(cmd):

 # On EC2, the ephemeral disk might be mounted on /mnt.
 # If /mnt is a mountpoint, place Docker workspace on it.
-system("if mountpoint -q /mnt; then sudo mkdir -p /mnt/docker && sudo ln -sfn /mnt/docker /var/lib/docker; fi")
+system("if mountpoint -q /mnt; then sudo mkdir /mnt/docker && sudo ln -s /mnt/docker /var/lib/docker; fi")

 # Put our public IP in /tmp/ipv4
 # ipv4_retrieval_endpoint = "http://169.254.169.254/latest/meta-data/public-ipv4"
@@ -108,7 +108,7 @@ system("sudo chmod +x /usr/local/bin/docker-machine")
 system("docker-machine version")

 system("sudo apt-get remove -y --purge dnsmasq-base")
-system("sudo apt-get -qy install python-setuptools pssh apache2-utils httping htop unzip mosh tree")
+system("sudo apt-get -qy install python-setuptools pssh apache2-utils httping htop unzip mosh")

 ### Wait for Docker to be up.
 ### (If we don't do this, Docker will not be responsive during the next step.)
--- a/prepare-vms/settings/csv.yaml
+++ b/prepare-vms/settings/csv.yaml
@@ -1,5 +0,0 @@
-# Number of VMs per cluster
-clustersize: 5
-
-# Jinja2 template to use to generate ready-to-cut cards
-cards_template: clusters.csv
--- a/prepare-vms/settings/example.yaml
+++ b/prepare-vms/settings/example.yaml
@@ -1,24 +0,0 @@
-# customize your cluster size, your cards template, and the versions
-
-# Number of VMs per cluster
-clustersize: 5
-
-# Jinja2 template to use to generate ready-to-cut cards
-cards_template: cards.html
-
-# Use "Letter" in the US, and "A4" everywhere else
-paper_size: Letter
-
-# Feel free to reduce this if your printer can handle it
-paper_margin: 0.2in
-
-# Note: paper_size and paper_margin only apply to PDF generated with pdfkit.
-# If you print (or generate a PDF) using ips.html, they will be ignored.
-# (The equivalent parameters must be set from the browser's print dialog.)
-
-# This can be "test" or "stable"
-engine_version: test
-
-# These correspond to the version numbers visible on their respective GitHub release pages
-compose_version: 1.18.0
-machine_version: 0.13.0
--- a/prepare-vms/settings/fundamentals.yaml
+++ b/prepare-vms/settings/fundamentals.yaml
@@ -17,8 +17,8 @@ paper_margin: 0.2in
 # (The equivalent parameters must be set from the browser's print dialog.)

 # This can be "test" or "stable"
-engine_version: stable
+engine_version: test

 # These correspond to the version numbers visible on their respective GitHub release pages
-compose_version: 1.21.1
-machine_version: 0.14.0
+compose_version: 1.16.1
+machine_version: 0.12.0
--- a/prepare-vms/settings/kube101.html
+++ b/prepare-vms/settings/kube101.html
@@ -1,106 +0,0 @@
-{# Feel free to customize or override anything in there! #}
-{%- set url = "http://container.training/" -%}
-{%- set pagesize = 12 -%}
-{%- if clustersize == 1 -%}
-    {%- set workshop_name = "Docker workshop" -%}
-    {%- set cluster_or_machine = "machine" -%}
-    {%- set this_or_each = "this" -%}
-    {%- set machine_is_or_machines_are = "machine is" -%}
-    {%- set image_src = "https://s3-us-west-2.amazonaws.com/www.breadware.com/integrations/docker.png" -%}
-{%- else -%}
-    {%- set workshop_name = "Kubernetes workshop" -%}
-    {%- set cluster_or_machine = "cluster" -%}
-    {%- set this_or_each = "each" -%}
-    {%- set machine_is_or_machines_are = "machines are" -%}
-    {%- set image_src_swarm = "https://cdn.wp.nginx.com/wp-content/uploads/2016/07/docker-swarm-hero2.png" -%}
-    {%- set image_src_kube = "https://avatars1.githubusercontent.com/u/13629408" -%}
-    {%- set image_src = image_src_kube -%}
-{%- endif -%}
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
-<html>
-<head><style>
-body, table {
-    margin: 0;
-    padding: 0;
-    line-height: 1em;
-    font-size: 14px;
-}
-
-table {
-    border-spacing: 0;
-    margin-top: 0.4em;
-    margin-bottom: 0.4em;
-    border-left: 0.8em double grey;
-    padding-left: 0.4em;
-}
-
-div {
-    float: left;
-    border: 1px dotted black;
-    padding-top: 1%;
-    padding-bottom: 1%;
-    /* columns * (width+left+right) < 100% */
-    width: 21.5%;
-    padding-left: 1.5%;
-    padding-right: 1.5%;
-}
-
-p {
-    margin: 0.4em 0 0.4em 0;
-}
-
-img {
-    height: 4em;
-    float: right;
-    margin-right: -0.4em;
-}
-
-.logpass {
-    font-family: monospace;
-    font-weight: bold;
-}
-
-.pagebreak {
-    page-break-after: always;
-    clear: both;
-    display: block;
-    height: 8px;
-}
-</style></head>
-<body>
-{% for cluster in clusters %}
-    {% if loop.index0>0 and loop.index0%pagesize==0 %}
-        <span class="pagebreak"></span>
-    {% endif %}
-    <div>
-
-        <p>
-            Here is the connection information to your very own
-            {{ cluster_or_machine }} for this {{ workshop_name }}.
-            You can connect to {{ this_or_each }} VM with any SSH client.
-        </p>
-        <p>
-            <img src="{{ image_src }}" />
-            <table>
-                <tr><td>login:</td></tr>
-                <tr><td class="logpass">docker</td></tr>
-                <tr><td>password:</td></tr>
-                <tr><td class="logpass">training</td></tr>
-            </table>
-
-        </p>
-        <p>
-            Your {{ machine_is_or_machines_are }}:
-            <table>
-                {% for node in cluster %}
-                <tr><td>node{{ loop.index }}:</td><td>{{ node }}</td></tr>
-                {% endfor %}
-            </table>
-        </p>
-        <p>You can find the slides at:
-            <center>{{ url }}</center>
-        </p>
-    </div>
-{% endfor %}
-</body>
-</html>
--- a/prepare-vms/settings/kube101.yaml
+++ b/prepare-vms/settings/kube101.yaml
@@ -1,24 +0,0 @@
-# 3 nodes for k8s 101 workshops
-
-# Number of VMs per cluster
-clustersize: 3
-
-# Jinja2 template to use to generate ready-to-cut cards
-cards_template: settings/kube101.html
-
-# Use "Letter" in the US, and "A4" everywhere else
-paper_size: Letter
-
-# Feel free to reduce this if your printer can handle it
-paper_margin: 0.2in
-
-# Note: paper_size and paper_margin only apply to PDF generated with pdfkit.
-# If you print (or generate a PDF) using ips.html, they will be ignored.
-# (The equivalent parameters must be set from the browser's print dialog.)
-
-# This can be "test" or "stable"
-engine_version: stable
-
-# These correspond to the version numbers visible on their respective GitHub release pages
-compose_version: 1.21.1
-machine_version: 0.14.0
--- a/prepare-vms/settings/orchestration.yaml
+++ b/prepare-vms/settings/orchestration.yaml
@@ -1,7 +1,7 @@
 # This file is passed by trainer-cli to scripts/ips-txt-to-html.py

 # Number of VMs per cluster
-clustersize: 3
+clustersize: 5

 # Jinja2 template to use to generate ready-to-cut cards
 cards_template: cards.html
@@ -17,8 +17,8 @@ paper_margin: 0.2in
 # (The equivalent parameters must be set from the browser's print dialog.)

 # This can be "test" or "stable"
-engine_version: stable
+engine_version: test

 # These correspond to the version numbers visible on their respective GitHub release pages
-compose_version: 1.21.1
-machine_version: 0.14.0
+compose_version: 1.16.1
+machine_version: 0.12.0
--- a/prepare-vms/workshopctl
+++ b/prepare-vms/workshopctl
@@ -38,7 +38,7 @@ check_envvars() {
        if [ -z "${!envvar}" ]; then
            error "Environment variable $envvar is not set."
            if [ "$envvar" = "SSH_AUTH_SOCK" ]; then
-                error "Hint: run 'eval \$(ssh-agent) ; ssh-add' and try again?"
+                error "Hint: run '\$(ssh-agent) ; ssh-add' and try again?"
            fi
            status=1
        fi
--- a/slides/_redirects
+++ b/slides/_redirects
@@ -1 +1 @@
-/ /kube-halfday.yml.html 200!
+/ /dockercon.yml.html 200!
--- a/slides/appendcheck.py
+++ b/slides/appendcheck.py
@@ -1,17 +0,0 @@
-#!/usr/bin/env python
-
-import logging
-import os
-import subprocess
-import sys
-
-logging.basicConfig(level=os.environ.get("LOG_LEVEL", "INFO"))
-
-filename = sys.argv[1]
-
-logging.info("Checking file {}...".format(filename))
-text = subprocess.check_output(["./slidechecker.js", filename])
-html = open(filename).read()
-html = html.replace("</textarea>", "\n---\n```\n{}\n```\n</textarea>".format(text))
-
-open(filename, "w").write(html)
--- a/slides/autopilot/autotest.py
+++ b/slides/autopilot/autotest.py
@@ -1,418 +0,0 @@
-#!/usr/bin/env python
-# coding: utf-8
-
-import click
-import logging
-import os
-import random
-import re
-import select
-import subprocess
-import sys
-import time
-import uuid
-import yaml
-
-
-logging.basicConfig(level=os.environ.get("LOG_LEVEL", "INFO"))
-
-
-TIMEOUT = 60 # 1 minute
-
-# This one is not a constant. It's an ugly global.
-IPADDR = None
-
-
-class State(object):
-
-    def __init__(self):
-        self.interactive = True
-        self.verify_status = False
-        self.simulate_type = True
-        self.slide = 1
-        self.snippet = 0
-
-    def load(self):
-        data = yaml.load(open("state.yaml"))
-        self.interactive = bool(data["interactive"])
-        self.verify_status = bool(data["verify_status"])
-        self.simulate_type = bool(data["simulate_type"])
-        self.slide = int(data["slide"])
-        self.snippet = int(data["snippet"])
-
-    def save(self):
-        with open("state.yaml", "w") as f:
-            yaml.dump(dict(
-                interactive=self.interactive,
-                verify_status=self.verify_status,
-                simulate_type=self.simulate_type,
-                slide=self.slide,
-                snippet=self.snippet,
-                ), f, default_flow_style=False)
-
-
-state = State()
-
-
-def hrule():
-    return "="*int(subprocess.check_output(["tput", "cols"]))
-
-# A "snippet" is something that the user is supposed to do in the workshop.
-# Most of the "snippets" are shell commands.
-# Some of them can be key strokes or other actions.
-# In the markdown source, they are the code sections (identified by triple-
-# quotes) within .exercise[] sections.
-
-class Snippet(object):
-
-    def __init__(self, slide, content):
-        self.slide = slide
-        self.content = content
-        # Extract the "method" (e.g. bash, keys, ...)
-        # On multi-line snippets, the method is alone on the first line
-        # On single-line snippets, the data follows the method immediately
-        if '\n' in content:
-            self.method, self.data = content.split('\n', 1)
-        else:
-            self.method, self.data = content.split(' ', 1)
-        self.data = self.data.strip()
-        self.next = None
-
-    def __str__(self):
-        return self.content
-
-
-class Slide(object):
-
-    current_slide = 0
-
-    def __init__(self, content):
-        self.number = Slide.current_slide
-        Slide.current_slide += 1
-
-        # Remove commented-out slides
-        # (remark.js considers ??? to be the separator for speaker notes)
-        content = re.split("\n\?\?\?\n", content)[0]
-        self.content = content
-
-        self.snippets = []
-        exercises = re.findall("\.exercise\[(.*)\]", content, re.DOTALL)
-        for exercise in exercises:
-            if "```" in exercise:
-                previous = None
-                for snippet_content in exercise.split("```")[1::2]:
-                    snippet = Snippet(self, snippet_content)
-                    if previous:
-                        previous.next = snippet
-                    previous = snippet
-                    self.snippets.append(snippet)
-            else:
-                logging.warning("Exercise on slide {} does not have any ``` snippet."
-                                .format(self.number))
-                self.debug()
-
-    def __str__(self):
-        text = self.content
-        for snippet in self.snippets:
-            text = text.replace(snippet.content, ansi("7")(snippet.content))
-        return text
-
-    def debug(self):
-        logging.debug("\n{}\n{}\n{}".format(hrule(), self.content, hrule()))
-
-
-def focus_slides():
-    subprocess.check_output(["i3-msg", "workspace", "3"])
-    subprocess.check_output(["i3-msg", "workspace", "1"])
-
-def focus_terminal():
-    subprocess.check_output(["i3-msg", "workspace", "2"])
-    subprocess.check_output(["i3-msg", "workspace", "1"])
-
-def focus_browser():
-    subprocess.check_output(["i3-msg", "workspace", "4"])
-    subprocess.check_output(["i3-msg", "workspace", "1"])
-
-
-def ansi(code):
-    return lambda s: "\x1b[{}m{}\x1b[0m".format(code, s)
-
-
-# Sleeps the indicated delay, but interruptible by pressing ENTER.
-# If interrupted, returns True.
-def interruptible_sleep(t):
-    rfds, _, _ = select.select([0], [], [], t)
-    return 0 in rfds
-
-
-def wait_for_string(s, timeout=TIMEOUT):
-    logging.debug("Waiting for string: {}".format(s))
-    deadline = time.time() + timeout
-    while time.time() < deadline:
-        output = capture_pane()
-        if s in output:
-            return
-        if interruptible_sleep(1): return
-    raise Exception("Timed out while waiting for {}!".format(s))
-
-
-def wait_for_prompt():
-    logging.debug("Waiting for prompt.")
-    deadline = time.time() + TIMEOUT
-    while time.time() < deadline:
-        output = capture_pane()
-        # If we are not at the bottom of the screen, there will be a bunch of extra \n's
-        output = output.rstrip('\n')
-        last_line = output.split('\n')[-1]
-        # Our custom prompt on the VMs has two lines; the 2nd line is just '$'
-        if last_line == "$":
-            # This is a perfect opportunity to grab the node's IP address
-            global IPADDR
-            IPADDR = re.findall("^\[(.*)\]", output, re.MULTILINE)[-1]
-            return
-        # When we are in an alpine container, the prompt will be "/ #"
-        if last_line == "/ #":
-            return
-        # We did not recognize a known prompt; wait a bit and check again
-        logging.debug("Could not find a known prompt on last line: {!r}"
-                      .format(last_line))
-        if interruptible_sleep(1): return
-    raise Exception("Timed out while waiting for prompt!")
-
-
-def check_exit_status():
-    if not state.verify_status:
-        return
-    token = uuid.uuid4().hex
-    data = "echo {} $?\n".format(token)
-    logging.debug("Sending {!r} to get exit status.".format(data))
-    send_keys(data)
-    time.sleep(0.5)
-    wait_for_prompt()
-    screen = capture_pane()
-    status = re.findall("\n{} ([0-9]+)\n".format(token), screen, re.MULTILINE)
-    logging.debug("Got exit status: {}.".format(status))
-    if len(status) == 0:
-        raise Exception("Couldn't retrieve status code {}. Timed out?".format(token))
-    if len(status) > 1:
-        raise Exception("More than one status code {}. I'm seeing double! Shoot them both.".format(token))
-    code = int(status[0])
-    if code != 0:
-        raise Exception("Non-zero exit status: {}.".format(code))
-    # Otherwise just return peacefully.
-
-
-def setup_tmux_and_ssh():
-    if subprocess.call(["tmux", "has-session"]):
-        logging.error("Couldn't connect to tmux. Please setup tmux first.")
-        ipaddr = open("../../prepare-vms/ips.txt").read().split("\n")[0]
-        uid = os.getuid()
-
-        raise Exception("""
-1. If you're running this directly from a node:
-
-tmux
-
-2. If you want to control a remote tmux:
-
-rm -f /tmp/tmux-{uid}/default && ssh -t -L /tmp/tmux-{uid}/default:/tmp/tmux-1001/default docker@{ipaddr} tmux new-session -As 0
-
-3. If you cannot control a remote tmux:
-
-tmux new-session ssh docker@{ipaddr}
-""".format(uid=uid, ipaddr=ipaddr))
-    else:
-        logging.info("Found tmux session. Trying to acquire shell prompt.")
-        wait_for_prompt()
-    logging.info("Successfully connected to test cluster in tmux session.")
-
-
-slides = [Slide("Dummy slide zero")]
-content = open(sys.argv[1]).read()
-
-# OK, this part is definitely hackish, and will break if the
-# excludedClasses parameter is not on a single line.
-excluded_classes = re.findall("excludedClasses: (\[.*\])", content)
-excluded_classes = set(eval(excluded_classes[0]))
-
-for slide in re.split("\n---?\n", content):
-    slide_classes = re.findall("class: (.*)", slide)
-    if slide_classes:
-        slide_classes = slide_classes[0].split(",")
-        slide_classes = [c.strip() for c in slide_classes]
-    if excluded_classes & set(slide_classes):
-        logging.info("Skipping excluded slide.")
-        continue
-    slides.append(Slide(slide))
-
-
-def send_keys(data):
-    if state.simulate_type and data[0] != '^':
-        for key in data:
-            if key == ";":
-                key = "\\;"
-            if key == "\n":
-                if interruptible_sleep(1): return
-            subprocess.check_call(["tmux", "send-keys", key])
-            if interruptible_sleep(0.15*random.random()): return
-            if key == "\n":
-                if interruptible_sleep(1): return
-    else:
-        subprocess.check_call(["tmux", "send-keys", data])
-
-
-def capture_pane():
-    return subprocess.check_output(["tmux", "capture-pane", "-p"]).decode('utf-8')
-
-
-setup_tmux_and_ssh()
-
-
-try:
-    state.load()
-    logging.info("Successfully loaded state from file.")
-    # Let's override the starting state, so that when an error occurs,
-    # we can restart the auto-tester and then single-step or debug.
-    # (Instead of running again through the same issue immediately.)
-    state.interactive = True
-except Exception as e:
-    logging.exception("Could not load state from file.")
-    logging.warning("Using default values.")
-
-def move_forward():
-    state.snippet += 1
-    if state.snippet > len(slides[state.slide].snippets):
-        state.slide += 1
-        state.snippet = 0
-    check_bounds()
-
-
-def move_backward():
-    state.snippet -= 1
-    if state.snippet < 0:
-        state.slide -= 1
-        state.snippet = 0
-    check_bounds()
-
-
-def check_bounds():
-    if state.slide < 1:
-        state.slide = 1
-    if state.slide >= len(slides):
-        state.slide = len(slides)-1
-
-
-while True:
-    state.save()
-    slide = slides[state.slide]
-    snippet = slide.snippets[state.snippet-1] if state.snippet else None
-    click.clear()
-    print("[Slide {}/{}] [Snippet {}/{}] [simulate_type:{}] [verify_status:{}]"
-          .format(state.slide, len(slides)-1,
-                  state.snippet, len(slide.snippets) if slide.snippets else 0,
-                  state.simulate_type, state.verify_status))
-    print(hrule())
-    if snippet:
-        print(slide.content.replace(snippet.content, ansi(7)(snippet.content)))
-        focus_terminal()
-    else:
-        print(slide.content)
-        subprocess.check_output(["./gotoslide.js", str(slide.number)])
-        focus_slides()
-    print(hrule())
-    if state.interactive:
-        print("y/⎵/⏎   Execute snippet or advance to next snippet")
-        print("p/←     Previous")
-        print("n/→     Next")
-        print("s       Simulate keystrokes")
-        print("v       Validate exit status")
-        print("g       Go to a specific slide")
-        print("q       Quit")
-        print("c       Continue non-interactively until next error")
-        command = click.getchar()
-    else:
-        command = "y"
-
-    if command in ("n", "\x1b[C"):
-        move_forward()
-    elif command in ("p", "\x1b[D"):
-        move_backward()
-    elif command == "s":
-        state.simulate_type = not state.simulate_type
-    elif command == "v":
-        state.verify_status = not state.verify_status
-    elif command == "g":
-        state.slide = click.prompt("Enter slide number", type=int)
-        state.snippet = 0
-        check_bounds()
-    elif command == "q":
-        break
-    elif command == "c":
-        # continue until next timeout
-        state.interactive = False
-    elif command in ("y", "\r", " "):
-        if not snippet:
-            # Advance to next snippet
-            # Advance until a slide that has snippets
-            while not slides[state.slide].snippets:
-                move_forward()
-                # But stop if we reach the last slide
-                if state.slide == len(slides)-1:
-                    break
-            # And then advance to the snippet
-            move_forward()
-            continue
-        method, data = snippet.method, snippet.data
-        logging.info("Running with method {}: {}".format(method, data))
-        if method == "keys":
-            send_keys(data)
-        elif method == "bash":
-            # Make sure that we're ready
-            wait_for_prompt()
-            # Strip leading spaces
-            data = re.sub("\n +", "\n", data)
-            # Remove backticks (they are used to highlight sections)
-            data = data.replace('`', '')
-            # Add "RETURN" at the end of the command :)
-            data += "\n"
-            # Send command
-            send_keys(data)
-            # Force a short sleep to avoid race condition
-            time.sleep(0.5)
-            if snippet.next and snippet.next.method == "wait":
-                wait_for_string(snippet.next.data)
-            elif snippet.next and snippet.next.method == "longwait":
-                wait_for_string(snippet.next.data, 10*TIMEOUT)
-            else:
-                wait_for_prompt()
-                # Verify return code
-                check_exit_status()
-        elif method == "copypaste":
-            screen = capture_pane()
-            matches = re.findall(data, screen, flags=re.DOTALL)
-            if len(matches) == 0:
-                raise Exception("Could not find regex {} in output.".format(data))
-            # Arbitrarily get the most recent match
-            match = matches[-1]
-            # Remove line breaks (like a screen copy paste would do)
-            match = match.replace('\n', '')
-            send_keys(match + '\n')
-            # FIXME: we should factor out the "bash" method
-            wait_for_prompt()
-            check_exit_status()
-        elif method == "open":
-            # Cheap way to get node1's IP address
-            screen = capture_pane()
-            url = data.replace("/node1", "/{}".format(IPADDR))
-            # This should probably be adapted to run on different OS
-            subprocess.check_output(["xdg-open", url])
-            focus_browser()
-            if state.interactive:
-                print("Press any key to continue to next step...")
-                click.getchar()
-        else:
-            logging.warning("Unknown method {}: {!r}".format(method, data))
-        move_forward()
-
-    else:
-        logging.warning("Unknown command {}.".format(command))
--- a/slides/autopilot/gotoslide.js
+++ b/slides/autopilot/gotoslide.js
@@ -1,17 +0,0 @@
-#!/usr/bin/env node
-
-/* Expects a slide number as first argument.
- * Will connect to the local pub/sub server,
- * and issue a "go to slide X" command, which
- * will be sent to all connected browsers.
- */
-
-var io = require('socket.io-client');
-var socket = io('http://localhost:3000');
-socket.on('connect_error', function(){ 
-  console.log('connection error');
-  socket.close();
-});
-socket.emit('slide change', process.argv[2], function(){
-  socket.close();
-});
--- a/slides/autopilot/package-lock.json
+++ b/slides/autopilot/package-lock.json
@@ -1,603 +0,0 @@
-{
-  "name": "container-training-pub-sub-server",
-  "version": "0.0.1",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "accepts": {
-      "version": "1.3.4",
-      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.4.tgz",
-      "integrity": "sha1-hiRnWMfdbSGmR0/whKR0DsBesh8=",
-      "requires": {
-        "mime-types": "2.1.17",
-        "negotiator": "0.6.1"
-      }
-    },
-    "after": {
-      "version": "0.8.2",
-      "resolved": "https://registry.npmjs.org/after/-/after-0.8.2.tgz",
-      "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8="
-    },
-    "array-flatten": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
-    },
-    "arraybuffer.slice": {
-      "version": "0.0.6",
-      "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.6.tgz",
-      "integrity": "sha1-8zshWfBTKj8xB6JywMz70a0peco="
-    },
-    "async-limiter": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
-      "integrity": "sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg=="
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-    "backo2": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/backo2/-/backo2-1.0.2.tgz",
-      "integrity": "sha1-MasayLEpNjRj41s+u2n038+6eUc="
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-    },
-    "xmlhttprequest-ssl": {
-      "version": "1.5.4",
-      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.4.tgz",
-      "integrity": "sha1-BPVgkVcks4kIhxXMDteBPpZ3v1c="
-    },
-    "yeast": {
-      "version": "0.1.2",
-      "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
-      "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
-    }
-  }
-}
--- a/slides/autopilot/package.json
+++ b/slides/autopilot/package.json
@@ -1,8 +0,0 @@
-{
-  "name": "container-training-pub-sub-server",
-  "version": "0.0.1",
-  "dependencies": {
-    "express": "^4.16.2",
-    "socket.io": "^2.0.4"
-  }
-}
--- a/slides/autopilot/remote.js
+++ b/slides/autopilot/remote.js
@@ -1,21 +0,0 @@
-/* This snippet is loaded from the workshop HTML file.
- * It sets up callbacks to synchronize the local slide
- * number with the remote pub/sub server.
- */
-
-var socket = io();
-var leader = true;
-
-slideshow.on('showSlide', function (slide) {
-  if (leader) {
-    var n = slide.getSlideIndex()+1;
-    socket.emit('slide change', n);
-  }
-});
-
-socket.on('slide change', function (n) {
-  leader = false;
-  slideshow.gotoSlide(n);
-  leader = true;
-});
-
--- a/slides/autopilot/server.js
+++ b/slides/autopilot/server.js
@@ -1,41 +0,0 @@
-#!/usr/bin/env node
-
-/* This is a very simple pub/sub server, allowing to
- * remote control browsers displaying the slides.
- * The browsers connect to this pub/sub server using
- * Socket.IO, and the server tells them which slides
- * to display.
- *
- * The server can be controlled with a little CLI,
- * or by one of the browsers.
- */
-
-var express = require('express');
-var app = express();
-var http = require('http').Server(app);
-var io = require('socket.io')(http);
-
-app.get('/', function(req, res){
-  res.send('container.training autopilot pub/sub server');
-});
-
-/* Serve remote.js from the current directory */
-app.use(express.static('.'));
-
-/* Serve slides etc. from current and the parent directory */
-app.use(express.static('..'));
-
-io.on('connection', function(socket){
-  console.log('a client connected: ' + socket.handshake.address);
-  socket.on('slide change', function(n, ack){
-    console.log('slide change: ' + n);
-    socket.broadcast.emit('slide change', n);
-    if (typeof ack === 'function') {
-      ack();
-    }
-  });
-});
-
-http.listen(3000, function(){
-  console.log('listening on *:3000');
-});
--- a/slides/autopilot/tmux-style.sh
+++ b/slides/autopilot/tmux-style.sh
@@ -1,7 +0,0 @@
-#!/bin/sh
-# This removes the clock (and other extraneous stuff) from the
-# tmux status bar, and it gives it a non-default color.
-tmux set-option -g status-left ""
-tmux set-option -g status-right ""
-tmux set-option -g status-style bg=cyan
-
--- a/slides/build.sh
+++ b/slides/build.sh
@@ -1,29 +1,15 @@
 #!/bin/sh
-set -e
 case "$1" in
 once)
-  ./index.py
  for YAML in *.yml; do
-    ./markmaker.py $YAML > $YAML.html || { 
+    ./markmaker.py < $YAML > $YAML.html || { 
      rm $YAML.html
      break
    }
  done
-  if [ -n "$SLIDECHECKER" ]; then
-    for YAML in *.yml; do
-      ./appendcheck.py $YAML.html
-    done
-  fi
  ;;

 forever)
-  set +e
-  # check if entr is installed
-  if ! command -v entr >/dev/null; then
-    echo >&2 "First install 'entr' with apt, brew, etc."
-    exit
-  fi
-  
  # There is a weird bug in entr, at least on MacOS,
  # where it doesn't restore the terminal to a clean
  # state when exitting. So let's try to work around
--- a/slides/common/about-slides.md
+++ b/slides/common/about-slides.md
@@ -1,48 +0,0 @@
-## About these slides
-
- All the content is available in a public GitHub repository:
-
-  https://@@GITREPO@@
-
- You can get updated "builds" of the slides there:
-
-  http://container.training/
-
-<!--
-.exercise[
-```open https://@@GITREPO@@```
-```open http://container.training/```
-]
-->
-
--
-
- Typos? Mistakes? Questions? Feel free to hover over the bottom of the slide ...
-
-.footnote[.emoji[👇] Try it! The source file will be shown and you can view it on GitHub and fork and edit it.]
-
-<!--
-.exercise[
-```open https://@@GITREPO@@/tree/master/slides/common/about-slides.md```
-]
-->
-
---
-
-class: extra-details
-
-## Extra details
-
- This slide has a little magnifying glass in the top left corner
-
- This magnifying glass indicates slides that provide extra details
-
- Feel free to skip them if:
-
-  - you are in a hurry
-
-  - you are new to this and want to avoid cognitive overload
-
-  - you want only the most essential information
-
- You can review these slides another time if you want, they'll be waiting for you ☺
--- a/slides/common/composedown.md
+++ b/slides/common/composedown.md
@@ -1,12 +0,0 @@
-## Clean up
-
- Before moving on, let's remove those containers
-
-.exercise[
-
- Tell Compose to remove everything:
-  ```bash
-  docker-compose down
-  ```
-
-]
--- a/slides/common/composescale.md
+++ b/slides/common/composescale.md
@@ -1,220 +0,0 @@
-## Restarting in the background
-
- Many flags and commands of Compose are modeled after those of `docker`
-
-.exercise[
-
- Start the app in the background with the `-d` option:
-  ```bash
-  docker-compose up -d
-  ```
-
- Check that our app is running with the `ps` command:
-  ```bash
-  docker-compose ps
-  ```
-
-]
-
-`docker-compose ps` also shows the ports exposed by the application.
-
---
-
-class: extra-details
-
-## Viewing logs
-
- The `docker-compose logs` command works like `docker logs`
-
-.exercise[
-
- View all logs since container creation and exit when done:
-  ```bash
-  docker-compose logs
-  ```
-
- Stream container logs, starting at the last 10 lines for each container:
-  ```bash
-  docker-compose logs --tail 10 --follow
-  ```
-
-<!--
-```wait units of work done```
-```keys ^C```
-->
-
-]
-
-Tip: use `^S` and `^Q` to pause/resume log output.
-
---
-
-## Scaling up the application
-
- Our goal is to make that performance graph go up (without changing a line of code!)
-
--
-
- Before trying to scale the application, we'll figure out if we need more resources
-
-  (CPU, RAM...)
-
- For that, we will use good old UNIX tools on our Docker node
-
---
-
-## Looking at resource usage
-
- Let's look at CPU, memory, and I/O usage
-
-.exercise[
-
- run `top` to see CPU and memory usage (you should see idle cycles)
-
-<!--
-```bash top```
-
-```wait Tasks```
-```keys ^C```
-->
-
- run `vmstat 1` to see I/O usage (si/so/bi/bo)
-  <br/>(the 4 numbers should be almost zero, except `bo` for logging)
-
-<!--
-```bash vmstat 1```
-
-```wait memory```
-```keys ^C```
-->
-
-]
-
-We have available resources.
-
- Why?
- How can we use them?
-
---
-
-## Scaling workers on a single node
-
- Docker Compose supports scaling
- Let's scale `worker` and see what happens!
-
-.exercise[
-
- Start one more `worker` container:
-  ```bash
-  docker-compose up -d --scale worker=2
-  ```
-
- Look at the performance graph (it should show a x2 improvement)
-
- Look at the aggregated logs of our containers (`worker_2` should show up)
-
- Look at the impact on CPU load with e.g. top (it should be negligible)
-
-]
-
---
-
-## Adding more workers
-
- Great, let's add more workers and call it a day, then!
-
-.exercise[
-
- Start eight more `worker` containers:
-  ```bash
-  docker-compose up -d --scale worker=10
-  ```
-
- Look at the performance graph: does it show a x10 improvement?
-
- Look at the aggregated logs of our containers
-
- Look at the impact on CPU load and memory usage
-
-]
-
---
-
-# Identifying bottlenecks
-
- You should have seen a 3x speed bump (not 10x)
-
- Adding workers didn't result in linear improvement
-
- *Something else* is slowing us down
-
--
-
- ... But what?
-
--
-
- The code doesn't have instrumentation
-
- Let's use state-of-the-art HTTP performance analysis!
-  <br/>(i.e. good old tools like `ab`, `httping`...)
-
---
-
-## Accessing internal services
-
- `rng` and `hasher` are exposed on ports 8001 and 8002
-
- This is declared in the Compose file:
-
-  ```yaml
-    ...
-    rng:
-      build: rng
-      ports:
-      - "8001:80"
-
-    hasher:
-      build: hasher
-      ports:
-      - "8002:80"
-    ...
-  ```
-
---
-
-## Measuring latency under load
-
-We will use `httping`.
-
-.exercise[
-
- Check the latency of `rng`:
-  ```bash
-  httping -c 3 localhost:8001
-  ```
-
- Check the latency of `hasher`:
-  ```bash
-  httping -c 3 localhost:8002
-  ```
-
-]
-
-`rng` has a much higher latency than `hasher`.
-
---
-
-## Let's draw hasty conclusions
-
- The bottleneck seems to be `rng`
-
- *What if* we don't have enough entropy and can't generate enough random numbers?
-
- We need to scale out the `rng` service on multiple machines!
-
-Note: this is a fiction! We have enough entropy. But we need a pretext to scale out.
-
-(In fact, the code of `rng` uses `/dev/urandom`, which never runs out of entropy...
-<br/>
-...and is [just as good as `/dev/random`](http://www.slideshare.net/PacSecJP/filippo-plain-simple-reality-of-entropy).)
--- a/slides/common/declarative.md
+++ b/slides/common/declarative.md
@@ -1,63 +0,0 @@
-# Declarative vs imperative
-
- Our container orchestrator puts a very strong emphasis on being *declarative*
-
- Declarative:
-
-  *I would like a cup of tea.*
-
- Imperative:
-
-  *Boil some water. Pour it in a teapot. Add tea leaves. Steep for a while. Serve in a cup.*
-
--
-
- Declarative seems simpler at first ... 
-
--
-
- ... As long as you know how to brew tea
-
---
-
-## Declarative vs imperative
-
- What declarative would really be:
-
-  *I want a cup of tea, obtained by pouring an infusion¹ of tea leaves in a cup.*
-
--
-
-  *¹An infusion is obtained by letting the object steep a few minutes in hot² water.*
-
--
-
-  *²Hot liquid is obtained by pouring it in an appropriate container³ and setting it on a stove.*
-
--
-
-  *³Ah, finally, containers! Something we know about. Let's get to work, shall we?*
-
--
-
-.footnote[Did you know there was an [ISO standard](https://en.wikipedia.org/wiki/ISO_3103)
-specifying how to brew tea?]
-
---
-
-## Declarative vs imperative
-
- Imperative systems:
-
-  - simpler
-
-  - if a task is interrupted, we have to restart from scratch
-
- Declarative systems:
-
-  - if a task is interrupted (or if we show up to the party half-way through),
-    we can figure out what's missing and do only what's necessary
-
-  - we need to be able to *observe* the system
-
-  - ... and compute a "diff" between *what we have* and *what we want*
--- a/slides/common/prereqs.md
+++ b/slides/common/prereqs.md
@@ -1,309 +0,0 @@
-# Pre-requirements
-
- Be comfortable with the UNIX command line
-
-  - navigating directories
-
-  - editing files
-
-  - a little bit of bash-fu (environment variables, loops)
-
- Some Docker knowledge
-
-  - `docker run`, `docker ps`, `docker build`
-
-  - ideally, you know how to write a Dockerfile and build it
-    <br/>
-    (even if it's a `FROM` line and a couple of `RUN` commands)
-
- It's totally OK if you are not a Docker expert!
-
---
-
-class: title
-
-*Tell me and I forget.*
-<br/>
-*Teach me and I remember.*
-<br/>
-*Involve me and I learn.*
-
-Misattributed to Benjamin Franklin
-
-[(Probably inspired by Chinese Confucian philosopher Xunzi)](https://www.barrypopik.com/index.php/new_york_city/entry/tell_me_and_i_forget_teach_me_and_i_may_remember_involve_me_and_i_will_lear/)
-
---
-
-## Hands-on sections
-
- The whole workshop is hands-on
-
- We are going to build, ship, and run containers!
-
- You are invited to reproduce all the demos
-
- All hands-on sections are clearly identified, like the gray rectangle below
-
-.exercise[
-
- This is the stuff you're supposed to do!
-
- Go to @@SLIDES@@ to view these slides
-
- Join the chat room: @@CHAT@@
-
-<!-- ```open @@SLIDES@@``` -->
-
-]
-
---
-
-class: in-person
-
-## Where are we going to run our containers?
-
---
-
-class: in-person, pic
-
-![You get a cluster](images/you-get-a-cluster.jpg)
-
---
-
-class: in-person
-
-## You get a cluster of cloud VMs
-
- Each person gets a private cluster of cloud VMs (not shared with anybody else)
-
- They'll remain up for the duration of the workshop
-
- You should have a little card with login+password+IP addresses
-
- You can automatically SSH from one VM to another
-
- The nodes have aliases: `node1`, `node2`, etc.
-
---
-
-class: in-person
-
-## Why don't we run containers locally?
-
- Installing that stuff can be hard on some machines
-
-  (32 bits CPU or OS... Laptops without administrator access... etc.)
-
- *"The whole team downloaded all these container images from the WiFi!
-  <br/>... and it went great!"* (Literally no-one ever)
-
- All you need is a computer (or even a phone or tablet!), with:
-
-  - an internet connection
-
-  - a web browser
-
-  - an SSH client
-
---
-
-class: in-person
-
-## SSH clients
-
- On Linux, OS X, FreeBSD... you are probably all set
-
- On Windows, get one of these:
-
-  - [putty](http://www.putty.org/)
-  - Microsoft [Win32 OpenSSH](https://github.com/PowerShell/Win32-OpenSSH/wiki/Install-Win32-OpenSSH)
-  - [Git BASH](https://git-for-windows.github.io/)
-  - [MobaXterm](http://mobaxterm.mobatek.net/)
-
- On Android, [JuiceSSH](https://juicessh.com/)
-  ([Play Store](https://play.google.com/store/apps/details?id=com.sonelli.juicessh))
-  works pretty well
-
- Nice-to-have: [Mosh](https://mosh.org/) instead of SSH, if your internet connection tends to lose packets
-
---
-
-class: in-person, extra-details
-
-## What is this Mosh thing?
-
-*You don't have to use Mosh or even know about it to follow along.
-<br/>
-We're just telling you about it because some of us think it's cool!*
-
- Mosh is "the mobile shell"
-
- It is essentially SSH over UDP, with roaming features
-
- It retransmits packets quickly, so it works great even on lossy connections
-
-  (Like hotel or conference WiFi)
-
- It has intelligent local echo, so it works great even in high-latency connections
-
-  (Like hotel or conference WiFi)
-
- It supports transparent roaming when your client IP address changes
-
-  (Like when you hop from hotel to conference WiFi)
-
---
-
-class: in-person, extra-details
-
-## Using Mosh
-
- To install it: `(apt|yum|brew) install mosh`
-
- It has been pre-installed on the VMs that we are using
-
- To connect to a remote machine: `mosh user@host`
-
-  (It is going to establish an SSH connection, then hand off to UDP)
-
- It requires UDP ports to be open
-
-  (By default, it uses a UDP port between 60000 and 61000)
-
---
-
-class: in-person
-
-## Connecting to our lab environment
-
-.exercise[
-
- Log into the first VM (`node1`) with your SSH client
-
-<!--
-```bash
-for N in $(awk '/\Wnode/{print $2}' /etc/hosts); do
-  ssh -o StrictHostKeyChecking=no $N true
-done
-```
-
-```bash
-if which kubectl; then
-  kubectl get all -o name | grep -v service/kubernetes | xargs -rn1 kubectl delete
-fi
-```
-->
-
- Check that you can SSH (without password) to `node2`:
-  ```bash
-  ssh node2
-  ```
- Type `exit` or `^D` to come back to `node1`
-
-<!-- ```bash exit``` -->
-
-]
-
-If anything goes wrong — ask for help!
-
---
-
-## Doing or re-doing the workshop on your own?
-
- Use something like
-  [Play-With-Docker](http://play-with-docker.com/) or
-  [Play-With-Kubernetes](https://medium.com/@marcosnils/introducing-pwk-play-with-k8s-159fcfeb787b)
-
-  Zero setup effort; but environment are short-lived and
-  might have limited resources
-
- Create your own cluster (local or cloud VMs)
-
-  Small setup effort; small cost; flexible environments
-
- Create a bunch of clusters for you and your friends
-    ([instructions](https://@@GITREPO@@/tree/master/prepare-vms))
-
-  Bigger setup effort; ideal for group training
-
---
-
-class: self-paced
-
-## Get your own Docker nodes
-
- If you already have some Docker nodes: great!
-
- If not: let's get some thanks to Play-With-Docker
-
-.exercise[
-
- Go to http://www.play-with-docker.com/
-
- Log in
-
- Create your first node
-
-<!-- ```open http://www.play-with-docker.com/``` -->
-
-]
-
-You will need a Docker ID to use Play-With-Docker.
-
-(Creating a Docker ID is free.)
-
---
-
-## We will (mostly) interact with node1 only
-
-*These remarks apply only when using multiple nodes, of course.*
-
- Unless instructed, **all commands must be run from the first VM, `node1`**
-
- We will only checkout/copy the code on `node1`
-
- During normal operations, we do not need access to the other nodes
-
- If we had to troubleshoot issues, we would use a combination of:
-
-  - SSH (to access system logs, daemon status...)
-  
-  - Docker API (to check running containers and container engine status)
-
---
-
-## Terminals
-
-Once in a while, the instructions will say:
-<br/>"Open a new terminal."
-
-There are multiple ways to do this:
-
- create a new window or tab on your machine, and SSH into the VM;
-
- use screen or tmux on the VM and open a new window from there.
-
-You are welcome to use the method that you feel the most comfortable with.
-
---
-
-## Tmux cheatsheet
-
-[Tmux](https://en.wikipedia.org/wiki/Tmux) is a terminal multiplexer like `screen`.
-
-*You don't have to use it or even know about it to follow along.
-<br/>
-But some of us like to use it to switch between terminals.
-<br/>
-It has been preinstalled on your workshop nodes.*
-
- Ctrl-b c → creates a new window
- Ctrl-b n → go to next window
- Ctrl-b p → go to previous window
- Ctrl-b " → split window top/bottom
- Ctrl-b % → split window left/right
- Ctrl-b Alt-1 → rearrange windows in columns
- Ctrl-b Alt-2 → rearrange windows in rows
- Ctrl-b arrows → navigate to other windows
- Ctrl-b d → detach session
- tmux attach → reattach to session
--- a/slides/common/pwd.md
+++ b/slides/common/pwd.md
@@ -1,19 +0,0 @@
-## Using Play-With-Docker
-
- Open a new browser tab to [www.play-with-docker.com](http://www.play-with-docker.com/)
-
- Confirm that you're not a robot
-
- Click on "ADD NEW INSTANCE": congratulations, you have your first Docker node!
-
- When you will need more nodes, just click on "ADD NEW INSTANCE" again
-
- Note the countdown in the corner; when it expires, your instances are destroyed
-
- If you give your URL to somebody else, they can access your nodes too
-  <br/>
-  (You can use that for pair programming, or to get help from a mentor)
-
- Loving it? Not loving it? Tell it to the wonderful authors,
-  [@marcosnils](https://twitter.com/marcosnils) &
-  [@xetorthio](https://twitter.com/xetorthio)!
--- a/slides/common/sampleapp.md
+++ b/slides/common/sampleapp.md
@@ -1,71 +1,16 @@
 # Our sample application

- We will clone the GitHub repository onto our `node1`
-
- The repository also contains scripts and tools that we will use through the workshop
-
-.exercise[
-
-<!--
-```bash
-if [ -d container.training ]; then
-  mv container.training container.training.$$
-fi
-```
-->
-
- Clone the repository on `node1`:
-  ```bash
-  git clone git://@@GITREPO@@
-  ```
-
-]
-
-(You can also fork the repository on GitHub and clone your fork if you prefer that.)
-
---
-
-## Downloading and running the application
-
-Let's start this before we look around, as downloading will take a little time...
-
-.exercise[
-
- Go to the `dockercoins` directory, in the cloned repo:
-  ```bash
-  cd ~/container.training/dockercoins
-  ```
-
- Use Compose to build and run all containers:
-  ```bash
-  docker-compose up
-  ```
-
-<!--
-```longwait units of work done```
-->
-
-]
-
-Compose tells Docker to build all container images (pulling
-the corresponding base images), then starts all containers,
-and displays aggregated logs.
-
---
-
-## More detail on our sample application
-
 - Visit the GitHub repository with all the materials of this workshop:
-  <br/>https://@@GITREPO@@
+  <br/>https://github.com/jpetazzo/orchestration-workshop

 - The application is in the [dockercoins](
-  https://@@GITREPO@@/tree/master/dockercoins)
+  https://github.com/jpetazzo/orchestration-workshop/tree/master/dockercoins)
  subdirectory

 - Let's look at the general layout of the source code:

  there is a Compose file [docker-compose.yml](
-  https://@@GITREPO@@/blob/master/dockercoins/docker-compose.yml) ...
+  https://github.com/jpetazzo/orchestration-workshop/blob/master/dockercoins/docker-compose.yml) ...

  ... and 4 other services, each in its own directory:

@@ -94,43 +39,6 @@ class: extra-details

 ---

-## Service discovery in container-land
-
- We do not hard-code IP addresses in the code
-
- We do not hard-code FQDN in the code, either
-
- We just connect to a service name, and container-magic does the rest
-
-  (And by container-magic, we mean "a crafty, dynamic, embedded DNS server")
-
---
-
-## Example in `worker/worker.py`
-
-```python
-redis = Redis("`redis`")
-
-
-def get_random_bytes():
-    r = requests.get("http://`rng`/32")
-    return r.content
-
-
-def hash_bytes(data):
-    r = requests.post("http://`hasher`/",
-                      data=data,
-                      headers={"Content-Type": "application/octet-stream"})
-```
-
-(Full source code available [here](
-https://@@GITREPO@@/blob/8279a3bce9398f7c1a53bdd95187c53eda4e6435/dockercoins/worker/worker.py#L17
-))
-
---
-
-class: extra-details
-
 ## Links, naming, and service discovery

 - Containers can have network aliases (resolvable through DNS)
@@ -139,21 +47,37 @@ class: extra-details

 - Compose file version 1 did require "links" sections

+- Our code can connect to services using their short name
+
+  (instead of e.g. IP address or FQDN)
+
 - Network aliases are automatically namespaced

-  - you can have multiple apps declaring and using a service named `database`
+  (i.e. you can have multiple apps declaring and using a service named `database`)

-  - containers in the blue app will resolve `database` to the IP of the blue database
+---

-  - containers in the green app will resolve `database` to the IP of the green database
+## Example in `worker/worker.py`
+
+![Service discovery](images/service-discovery.png)

 ---

 ## What's this application?

--
+---

- It is a DockerCoin miner! .emoji[💰🐳📦🚢]
+class: pic
+
+![DockerCoins logo](images/dockercoins.png)
+
+(DockerCoins 2016 logo courtesy of [@XtlCnslt](https://twitter.com/xtlcnslt) and [@ndeloof](https://twitter.com/ndeloof). Thanks!)
+
+---
+
+## What's this application?
+
+- It is a DockerCoin miner! 💰🐳📦🚢

 --

@@ -175,22 +99,156 @@ class: extra-details

 ---

-## Our application at work
+## Getting the application source code

- On the left-hand side, the "rainbow strip" shows the container names
+- We will clone the GitHub repository

- On the right-hand side, we see the output of our containers
+- The repository also contains scripts and tools that we will use through the workshop
+
+.exercise[
+
+<!--
+```bash
+if [ -d orchestration-workshop ]; then
+  mv orchestration-workshop orchestration-workshop.$$
+fi
+```
+-->
+
+- Clone the repository on `node1`:
+  ```bash
+  git clone git://github.com/jpetazzo/orchestration-workshop
+  ```
+
+]
+
+(You can also fork the repository on GitHub and clone your fork if you prefer that.)
+
+---
+
+# Running the application
+
+Without further ado, let's start our application.
+
+.exercise[
+
+- Go to the `dockercoins` directory, in the cloned repo:
+  ```bash
+  cd ~/orchestration-workshop/dockercoins
+  ```
+
+- Use Compose to build and run all containers:
+  ```bash
+  docker-compose up
+  ```
+
+<!--
+```wait units of work done```
+```keys ^C```
+-->
+
+]
+
+Compose tells Docker to build all container images (pulling
+the corresponding base images), then starts all containers,
+and displays aggregated logs.
+
+---
+
+## Lots of logs
+
+- The application continuously generates logs

 - We can see the `worker` service making requests to `rng` and `hasher`

- For `rng` and `hasher`, we see HTTP access logs
+- Let's put that in the background
+
+.exercise[
+
+- Stop the application by hitting `^C`
+
+]
+
+- `^C` stops all containers by sending them the `TERM` signal
+
+- Some containers exit immediately, others take longer
+  <br/>(because they don't handle `SIGTERM` and end up being killed after a 10s timeout)
+
+---
+
+## Restarting in the background
+
+- Many flags and commands of Compose are modeled after those of `docker`
+
+.exercise[
+
+- Start the app in the background with the `-d` option:
+  ```bash
+  docker-compose up -d
+  ```
+
+- Check that our app is running with the `ps` command:
+  ```bash
+  docker-compose ps
+  ```
+
+]
+
+`docker-compose ps` also shows the ports exposed by the application.
+
+---
+
+class: extra-details
+
+## Viewing logs
+
+- The `docker-compose logs` command works like `docker logs`
+
+.exercise[
+
+- View all logs since container creation and exit when done:
+  ```bash
+  docker-compose logs
+  ```
+
+- Stream container logs, starting at the last 10 lines for each container:
+  ```bash
+  docker-compose logs --tail 10 --follow
+  ```
+
+<!--
+```wait units of work done```
+```keys ^C```
+-->
+
+]
+
+Tip: use `^S` and `^Q` to pause/resume log output.
+
+---
+
+class: extra-details
+
+## Upgrading from Compose 1.6
+
+.warning[The `logs` command has changed between Compose 1.6 and 1.7!]
+
+- Up to 1.6
+
+  - `docker-compose logs` is the equivalent of `logs --follow`
+
+  - `docker-compose logs` must be restarted if containers are added
+
+- Since 1.7
+
+  - `--follow` must be specified explicitly
+
+  - new containers are automatically picked up by `docker-compose logs`

 ---

 ## Connecting to the web UI

- "Logs are exciting and fun!" (No-one, ever)
-
 - The `webui` container exposes a web dashboard; let's view it

 .exercise[
@@ -205,31 +263,11 @@ class: extra-details

 ]

-A drawing area should show up, and after a few seconds, a blue
-graph will appear.
+You should see a speed of approximately 4 hashes/second.

---
-
-class: self-paced, extra-details
-
-## If the graph doesn't load
-
-If you just see a `Page not found` error, it might be because your
-Docker Engine is running on a different machine. This can be the case if:
-
- you are using the Docker Toolbox
-
- you are using a VM (local or remote) created with Docker Machine
-
- you are controlling a remote Docker Engine
-
-When you run DockerCoins in development mode, the web UI static files
-are mapped to the container using a volume. Alas, volumes can only
-work on a local environment, or when using Docker4Mac or Docker4Windows.
-
-How to fix this?
-
-Stop the app with `^C`, edit `dockercoins.yml`, comment out the `volumes` section, and try again.
+More precisely: 4 hashes/second, with regular dips down to zero.
+<br/>This is because Jérôme is incapable of writing good frontend code.
+<br/>Don't ask. Seriously, don't ask. This is embarrassing.

 ---

@@ -237,67 +275,203 @@ class: extra-details

 ## Why does the speed seem irregular?

- It *looks like* the speed is approximately 4 hashes/second
-
- Or more precisely: 4 hashes/second, with regular dips down to zero
-
- Why?
-
--
-
-class: extra-details
-
 - The app actually has a constant, steady speed: 3.33 hashes/second
  <br/>
  (which corresponds to 1 hash every 0.3 seconds, for *reasons*)

- Yes, and?
-
---
-
-class: extra-details
-
-## The reason why this graph is *not awesome*
-
 - The worker doesn't update the counter after every loop, but up to once per second

 - The speed is computed by the browser, checking the counter about once per second

 - Between two consecutive updates, the counter will increase either by 4, or by 0

- The perceived speed will therefore be 4 - 4 - 4 - 0 - 4 - 4 - 0 etc.
+- The perceived speed will therefore be 4 - 4 - 4 - 0 - 4 - 4 - etc.

- What can we conclude from this?
-
--
-
-class: extra-details
-
- "I'm clearly incapable of writing good frontend code!" 😀 — Jérôme
+*We told you to not ask!!!*

 ---

-## Stopping the application
+## Scaling up the application

- If we interrupt Compose (with `^C`), it will politely ask the Docker Engine to stop the app
+- Our goal is to make that performance graph go up (without changing a line of code!)

- The Docker Engine will send a `TERM` signal to the containers
+--

- If the containers do not exit in a timely manner, the Engine sends a `KILL` signal
+- Before trying to scale the application, we'll figure out if we need more resources
+
+  (CPU, RAM...)
+
+- For that, we will use good old UNIX tools on our Docker node
+
+---
+
+## Looking at resource usage
+
+- Let's look at CPU, memory, and I/O usage

 .exercise[

- Stop the application by hitting `^C`
+- run `top` to see CPU and memory usage (you should see idle cycles)

 <!--
+```bash top```
+
+```wait Tasks```
+```keys ^C```
+-->
+
+- run `vmstat 1` to see I/O usage (si/so/bi/bo)
+  <br/>(the 4 numbers should be almost zero, except `bo` for logging)
+
+<!--
+```bash vmstat 1```
+
+```wait memory```
 ```keys ^C```
 -->

 ]

+We have available resources.
+
+- Why?
+- How can we use them?
+
+---
+
+## Scaling workers on a single node
+
+- Docker Compose supports scaling
+- Let's scale `worker` and see what happens!
+
+.exercise[
+
+- Start one more `worker` container:
+  ```bash
+  docker-compose scale worker=2
+  ```
+
+- Look at the performance graph (it should show a x2 improvement)
+
+- Look at the aggregated logs of our containers (`worker_2` should show up)
+
+- Look at the impact on CPU load with e.g. top (it should be negligible)
+
+]
+
+---
+
+## Adding more workers
+
+- Great, let's add more workers and call it a day, then!
+
+.exercise[
+
+- Start eight more `worker` containers:
+  ```bash
+  docker-compose scale worker=10
+  ```
+
+- Look at the performance graph: does it show a x10 improvement?
+
+- Look at the aggregated logs of our containers
+
+- Look at the impact on CPU load and memory usage
+
+]
+
+---
+
+# Identifying bottlenecks
+
+- You should have seen a 3x speed bump (not 10x)
+
+- Adding workers didn't result in linear improvement
+
+- *Something else* is slowing us down
+
 --

-Some containers exit immediately, others take longer.
+- ... But what?

-The containers that do not handle `SIGTERM` end up being killed after a 10s timeout. If we are very impatient, we can hit `^C` a second time!
+--

+- The code doesn't have instrumentation
+
+- Let's use state-of-the-art HTTP performance analysis!
+  <br/>(i.e. good old tools like `ab`, `httping`...)
+
+---
+
+## Accessing internal services
+
+- `rng` and `hasher` are exposed on ports 8001 and 8002
+
+- This is declared in the Compose file:
+
+  ```yaml
+    ...
+    rng:
+      build: rng
+      ports:
+      - "8001:80"
+
+    hasher:
+      build: hasher
+      ports:
+      - "8002:80"
+    ...
+  ```
+
+---
+
+## Measuring latency under load
+
+We will use `httping`.
+
+.exercise[
+
+- Check the latency of `rng`:
+  ```bash
+  httping -c 10 localhost:8001
+  ```
+
+- Check the latency of `hasher`:
+  ```bash
+  httping -c 10 localhost:8002
+  ```
+
+]
+
+`rng` has a much higher latency than `hasher`.
+
+---
+
+## Let's draw hasty conclusions
+
+- The bottleneck seems to be `rng`
+
+- *What if* we don't have enough entropy and can't generate enough random numbers?
+
+- We need to scale out the `rng` service on multiple machines!
+
+Note: this is a fiction! We have enough entropy. But we need a pretext to scale out.
+
+(In fact, the code of `rng` uses `/dev/urandom`, which never runs out of entropy...
+<br/>
+...and is [just as good as `/dev/random`](http://www.slideshare.net/PacSecJP/filippo-plain-simple-reality-of-entropy).)
+
+---
+
+## Clean up
+
+- Before moving on, let's remove those containers
+
+.exercise[
+
+- Tell Compose to remove everything:
+  ```bash
+  docker-compose down
+  ```
+
+]
--- a/slides/common/thankyou.md
+++ b/slides/common/thankyou.md
@@ -1,11 +0,0 @@
-class: title, self-paced
-
-Thank you!
-
---
-
-class: title, in-person
-
-That's all, folks! <br/> Questions?
-
-![end](images/end.jpg)
--- a/slides/common/title.md
+++ b/slides/common/title.md
@@ -1,21 +0,0 @@
-class: title, self-paced
-
-@@TITLE@@
-
-.nav[*Self-paced version*]
-
---
-
-class: title, in-person
-
-@@TITLE@@<br/></br>
-
-.footnote[
-**Be kind to the WiFi!**<br/>
-<!-- *Use the 5G network.* -->
-*Don't use your hotspot.*<br/>
-*Don't stream videos or download big files during the workshop.*<br/>
-*Thank you!*
-
-**Slides: @@SLIDES@@**
-]
--- a/slides/common/toc.md
+++ b/slides/common/toc.md
@@ -1,4 +0,0 @@
-
-@@TOC@@
-
-
--- a/slides/count-slides.py
+++ b/slides/count-slides.py
@@ -1,57 +0,0 @@
-#!/usr/bin/env python
-import re
-import sys
-
-PREFIX = "name: toc-"
-EXCLUDED = ["in-person"]
-
-class State(object):
-    def __init__(self):
-        self.current_slide = 1
-        self.section_title = None
-        self.section_start = 0
-        self.section_slides = 0
-        self.chapters = {}
-        self.sections = {}
-    def show(self):
-        if self.section_title.startswith("chapter-"):
-            return
-        print("{0.section_title}\t{0.section_start}\t{0.section_slides}".format(self))
-        self.sections[self.section_title] = self.section_slides
-
-state = State()
-
-title = None
-for line in open(sys.argv[1]):
-    line = line.rstrip()
-    if line.startswith(PREFIX):
-        if state.section_title is None:
-            print("{}\t{}\t{}".format("title", "index", "size"))
-        else:
-            state.show()
-        state.section_title = line[len(PREFIX):].strip()
-        state.section_start = state.current_slide
-        state.section_slides = 0
-    if line == "---":
-        state.current_slide += 1
-        state.section_slides += 1
-    if line == "--":
-        state.current_slide += 1
-    toc_links = re.findall("\(#toc-(.*)\)", line)
-    if toc_links and state.section_title.startswith("chapter-"):
-        if state.section_title not in state.chapters:
-            state.chapters[state.section_title] = []
-        state.chapters[state.section_title].append(toc_links[0])
-    # This is really hackish
-    if line.startswith("class:"):
-        for klass in EXCLUDED:
-            if klass in line:
-                state.section_slides -= 1
-                state.current_slide -= 1
-
-state.show()
-
-for chapter in sorted(state.chapters):
-    chapter_size = sum(state.sections[s] for s in state.chapters[chapter])
-    print("{}\t{}\t{}".format("total size for", chapter, chapter_size))
-
--- a/slides/dockercon.yml
+++ b/slides/dockercon.yml
@@ -0,0 +1,182 @@
+chat: "[Slack](https://dockercommunity.slack.com/messages/C7ET1GY4Q)"
+
+exclude:
+- self-paced
+- snap
+- auto-btp
+- benchmarking
+- elk-manual
+- prom-manual
+
+title: "Swarm: from Zero to Hero (DC17EU)"
+chapters:
+- |
+  class: title
+
+  .small[
+
+  Swarm: from Zero to Hero
+
+  .small[.small[
+
+  **Be kind to the WiFi!**
+
+  *Use the 5G network*
+  <br/>
+  *Don't use your hotspot*
+  <br/>
+  *Don't stream videos from YouTube, Netflix, etc.
+  <br/>(if you're bored, watch local content instead)*
+
+  Also: share the power outlets
+  <br/>
+  *(with limited power comes limited responsibility?)*
+  <br/>
+  *(or something?)*
+
+  Thank you!
+
+  ]
+  ]
+  ]
+
+  ---
+
+  ## Intros
+ 
+  <!--
+  - Hello! We are
+    AJ ([@s0ulshake](https://twitter.com/s0ulshake))
+    &
+    Jérôme ([@jpetazzo](https://twitter.com/jpetazzo))
+  -->
+
+  - Hello! We are Jérôme, Lee, Nicholas, and Scott
+
+  <!--
+    I am
+    Jérôme ([@jpetazzo](https://twitter.com/jpetazzo))
+  -->
+
+  --
+
+  - This is our collective Docker knowledge:
+
+    ![Bell Curve](images/bell-curve.jpg)
+
+  ---
+
+  ## "From zero to hero"
+
+  --
+
+  - It rhymes, but it's a pretty bad title, to be honest
+
+  --
+  
+  - None of you is a "zero"
+
+  --
+  
+  - None of us is a "hero"
+
+  --
+  
+  - None of us should even try to be a hero
+
+  --
+  
+    *The hero syndrome is a phenomenon affecting people who seek heroism or recognition,
+    usually by creating a desperate situation which they can resolve.
+    This can include unlawful acts, such as arson.
+    The phenomenon has been noted to affect civil servants,
+    such as firefighters, nurses, police officers, and security guards.*
+
+    (Wikipedia page on [hero syndrome](https://en.wikipedia.org/wiki/Hero_syndrome))
+
+  ---
+
+  ## Agenda
+
+  .small[
+  - 09:00-09:10 Hello!
+  - 09:10-10:30 Part 1
+  - 10:30-11:00 coffee break
+  - 11:00-12:30 Part 2
+  - 12:30-13:30 lunch break
+  - 13:30-15:00 Part 3
+  - 15:00-15:30 coffee break
+  - 15:30-17:00 Part 4
+  - 17:00-18:00 Afterhours and Q&A
+  ]
+
+  <!--
+  - The tutorial will run from 9:00am to 12:20pm
+
+  - This will be fast-paced, but DON'T PANIC!
+
+  - There will be a coffee break at 10:30am
+    <br/>
+    (please remind me if I forget about it!)
+  -->
+
+  - All the content is publicly available (slides, code samples, scripts)
+
+    Upstream URL: https://github.com/jpetazzo/orchestration-workshop
+
+  - Feel free to interrupt for questions at any time
+
+  - Live feedback, questions, help on [Gitter](chat)
+
+    http://container.training/chat
+
+- swarm/intro.md
+- |
+  @@TOC@@
+- - swarm/prereqs.md
+  - swarm/versions.md
+  - |
+    class: title
+
+    All right!
+    <br/>
+    We're all set.
+    <br/>
+    Let's do this.
+  - common/sampleapp.md
+  - swarm/swarmkit.md
+  - swarm/creatingswarm.md
+  - swarm/morenodes.md
+- - swarm/firstservice.md
+  - swarm/ourapponswarm.md
+  - swarm/updatingservices.md
+  - swarm/healthchecks.md
+- - swarm/operatingswarm.md
+  - swarm/netshoot.md
+  - swarm/ipsec.md
+  - swarm/swarmtools.md
+  - swarm/security.md
+  - swarm/secrets.md
+  - swarm/encryptionatrest.md
+  - swarm/leastprivilege.md
+  - swarm/apiscope.md
+- - swarm/logging.md
+  - swarm/metrics.md
+  - swarm/stateful.md
+  - swarm/extratips.md
+  - swarm/end.md
+- |
+  class: title
+
+  That's all folks! <br/> Questions?
+
+  .small[.small[
+
+  Jérôme ([@jpetazzo](https://twitter.com/jpetazzo)) — [@docker](https://twitter.com/docker)
+
+  ]]
+
+  <!--
+  Tiffany ([@tiffanyfayj](https://twitter.com/tiffanyfayj))
+  AJ ([@s0ulshake](https://twitter.com/s0ulshake))
+  -->
--- a/slides/find-non-ascii.sh
+++ b/slides/find-non-ascii.sh
@@ -1,2 +0,0 @@
-#!/bin/sh
-grep --color=auto -P -n "[^\x00-\x80]" */*.md
--- a/slides/images/title-ambassador.jpg
+++ b/slides/images/title-ambassador.jpg
--- a/slides/images/shipping-software-solution.png
+++ b/slides/images/shipping-software-solution.png
--- a/slides/images/title-background-containers.jpg
+++ b/slides/images/title-background-containers.jpg
--- a/slides/images/binpacking-1d-1.gif
+++ b/slides/images/binpacking-1d-1.gif
--- a/slides/images/binpacking-1d-2.gif
+++ b/slides/images/binpacking-1d-2.gif
--- a/slides/images/binpacking-2d.gif
+++ b/slides/images/binpacking-2d.gif
--- a/slides/images/binpacking-3d.gif
+++ b/slides/images/binpacking-3d.gif
--- a/slides/images/bridge1.png
+++ b/slides/images/bridge1.png
--- a/slides/images/bridge2.png
+++ b/slides/images/bridge2.png
--- a/slides/images/title-the-container-network-model.jpg
+++ b/slides/images/title-the-container-network-model.jpg
--- a/slides/images/conductor.jpg
+++ b/slides/images/conductor.jpg
--- a/slides/images/title-local-development-workflow-with-docker.jpg
+++ b/slides/images/title-local-development-workflow-with-docker.jpg
--- a/slides/images/title-advanced-dockerfiles.jpg
+++ b/slides/images/title-advanced-dockerfiles.jpg
--- a/slides/images/construction2.jpg
+++ b/slides/images/construction2.jpg
--- a/slides/images/container-background.jpg
+++ b/slides/images/container-background.jpg
--- a/slides/images/container-layers.jpg
+++ b/slides/images/container-layers.jpg
--- a/slides/images/title-naming-and-inspecting-containers.jpg
+++ b/slides/images/title-naming-and-inspecting-containers.jpg
--- a/slides/images/title-copying-files-during-build.jpg
+++ b/slides/images/title-copying-files-during-build.jpg
--- a/slides/images/demo.jpg
+++ b/slides/images/demo.jpg
--- a/slides/images/ambassador-diagram.odg
+++ b/slides/images/ambassador-diagram.odg
--- a/slides/images/ambassador-diagram.png
+++ b/slides/images/ambassador-diagram.png
--- a/slides/images/docker-con-15-logo.svg
+++ b/slides/images/docker-con-15-logo.svg
@@ -1,213 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Generator: Adobe Illustrator 18.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
-	 viewBox="0 0 445 390" enable-background="new 0 0 445 390" xml:space="preserve">
-<g>
-	<path fill="#3A4D54" d="M158.8,352.2h-25.9c3.2,0,5.8-2.6,5.8-5.9s-2.6-5.9-5.8-5.9h-19c3.2,0,5.8-2.6,5.8-5.9s-2.6-5.9-5.8-5.9
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--- a/slides/images/docker-ecosystem-2015.png
+++ b/slides/images/docker-ecosystem-2015.png
--- a/slides/images/docker-engine-architecture.svg
+++ b/slides/images/docker-engine-architecture.svg
--- a/slides/images/dockerd-and-containerd.png
+++ b/slides/images/dockerd-and-containerd.png
--- a/slides/images/shipping-matrix-solved.png
+++ b/slides/images/shipping-matrix-solved.png
--- a/slides/images/title-our-first-containers.jpg
+++ b/slides/images/title-our-first-containers.jpg
--- a/slides/images/fu-face.jpg
+++ b/slides/images/fu-face.jpg
--- a/slides/images/getting-inside.png
+++ b/slides/images/getting-inside.png
--- a/slides/images/title-connecting-containers-with-links.gif
+++ b/slides/images/title-connecting-containers-with-links.gif
--- a/slides/images/title-understanding-docker-images.png
+++ b/slides/images/title-understanding-docker-images.png
--- a/slides/images/ingress-lb.png
+++ b/slides/images/ingress-lb.png
--- a/slides/images/ingress-routing-mesh.png
+++ b/slides/images/ingress-routing-mesh.png
--- a/slides/images/title-installing-docker.jpg
+++ b/slides/images/title-installing-docker.jpg
--- a/slides/images/k8s-arch4-thanks-luxas.png
+++ b/slides/images/k8s-arch4-thanks-luxas.png
--- a/slides/images/docker-ce-ee-lifecycle.png
+++ b/slides/images/docker-ce-ee-lifecycle.png
--- a/slides/images/containers-as-lightweight-vms.png
+++ b/slides/images/containers-as-lightweight-vms.png
--- a/slides/images/shipping-matrix-from-hell.png
+++ b/slides/images/shipping-matrix-from-hell.png
--- a/slides/images/title-container-networking-basics.jpg
+++ b/slides/images/title-container-networking-basics.jpg
--- a/slides/images/shipping-software-problem.png
+++ b/slides/images/shipping-software-problem.png
--- a/slides/images/sharing-layers.jpg
+++ b/slides/images/sharing-layers.jpg
--- a/slides/images/shipping-indsutry-results.png
+++ b/slides/images/shipping-indsutry-results.png
--- a/slides/images/shipping-industry-solution.png
+++ b/slides/images/shipping-industry-solution.png
--- a/slides/images/shipping-industry-problem.png
+++ b/slides/images/shipping-industry-problem.png
--- a/slides/images/title-our-training-environment.jpg
+++ b/slides/images/title-our-training-environment.jpg
--- a/slides/images/stenciling-wall.jpg
+++ b/slides/images/stenciling-wall.jpg
--- a/slides/images/tangram.gif
+++ b/slides/images/tangram.gif
--- a/slides/images/tesla.jpg
+++ b/slides/images/tesla.jpg
--- a/slides/images/tetris-1.png
+++ b/slides/images/tetris-1.png
--- a/slides/images/tetris-2.gif
+++ b/slides/images/tetris-2.gif
--- a/slides/images/tetris-3.png
+++ b/slides/images/tetris-3.png
--- a/slides/images/k8s-arch3-thanks-weave.png
+++ b/slides/images/k8s-arch3-thanks-weave.png
--- a/slides/images/title-building-docker-images-with-a-dockerfile.jpg
+++ b/slides/images/title-building-docker-images-with-a-dockerfile.jpg
--- a/slides/images/traffic-graph.png
+++ b/slides/images/traffic-graph.png
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Jerome Petazzoni	60ce3882e8	fix-redirects.sh: adding forced redirect	2020-04-07 16:48:29 -05:00
Jérôme Petazzoni	3c6706ad03	Map site root to dc17eu workshop slides	2017-11-05 09:03:29 -08:00
Jérôme Petazzoni	bee3e763a9	Prepare dc17eu branch	2017-11-05 08:58:58 -08:00