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21 Commits

Author SHA1 Message Date
Jerome Petazzoni
8dacf00bf3 Test gitpod 2020-04-03 10:56:39 -05:00
Jerome Petazzoni
454843b755 Bump up versions 2020-04-02 07:39:10 -05:00
Jerome Petazzoni
63e68ab720 Update kubectl run to kubectl create deploy 2020-03-31 09:09:24 -05:00
Jerome Petazzoni
46f0bc0dfb Update kubectl run slideshow 2020-03-31 08:53:49 -05:00
Jerome Petazzoni
16bb3f1847 Split out chat room instructions for in-person vs online
Add instructions specific to Zoom, explaining how to
use the chat room and the non-verbal communication cues
2020-03-29 09:30:11 -05:00
Jerome Petazzoni
fef3fa31fb Update for Kubernetes 1.18 kubectl run
In Kubernetes 1.18, `kubectl run` no longer creates
a Deployment, and cannot create Jobs or CronJobs
anymore. It only creates Pods. Since we were using
`kubectl run` to create our first Deployment, I've
changed the materials to explain that change, and
explain how the behavior differs between 1.17- and
1.18+, since I expect that people will deal with
a mix of both scenarios for a while (at least a
year).
2020-03-28 13:53:45 -05:00
Jerome Petazzoni
b844e40372 Refactor card generation
Many improvements. QR code, fixed page size, better
use of page estate, etc.

Also pdfkit should kind of work now (not quite using
the full page size, but at least it's not utterly
broken like before).
2020-03-20 13:56:50 -05:00
Jerome Petazzoni
5b5d5946e8 Add logic for QRCode on back of cards 2020-03-20 08:24:58 -05:00
Jerome Petazzoni
af6705fb1e Add script to map DNS
This script needs:
- a list of domains managed by GANDI LiveDNS
- a list of IP addresses of clusters (like in tags/*/ips.txt)

It will replace the current configuration for these
domains so that they point to the clusters.

The apex of each domain and a wildcard entry will
have round-robin records pointing to all the nodes
of the cluster.

In addition, there will be records node[1234...]
pointing to each individual node.
2020-03-19 17:15:43 -05:00
Jerome Petazzoni
bfd63c16c6 Add tailhist to start a websocket server showing bash history on port 1088 2020-03-19 15:49:50 -05:00
Jerome Petazzoni
c506038682 Add QCON slides; tweak title 2020-03-05 02:01:17 -06:00
Jerome Petazzoni
7d8fdd43bd Improve exec syntax section 2020-03-02 21:47:58 -06:00
Jerome Petazzoni
adf0f53aab Update coupons 2020-02-29 11:46:27 -06:00
Jérôme Petazzoni
49fe1b8e17 Merge pull request #547 from tiffanyfay/master-typo
Fix resource typo in k8s slides
2020-02-26 00:01:20 -06:00
tiffany jernigan
073a5f8c84 Fix resource typo in k8s slides 2020-02-25 21:15:01 -08:00
Jerome Petazzoni
032803806d Refactor 'last words' slides 2020-02-24 20:38:01 -06:00
Jerome Petazzoni
f7b327a33a Streamline title slide 2020-02-24 19:00:41 -06:00
Jerome Petazzoni
d3526aac00 Add exercises 2020-02-22 07:43:27 -06:00
Jerome Petazzoni
3736dd6e86 Add 2-day container course 2020-02-19 10:00:24 -06:00
Jerome Petazzoni
c03f199023 Add reference to resource monitoring tools 2020-02-17 04:56:43 -06:00
Jerome Petazzoni
8ba9c2e41b Reorg admin content
Split network interconnect in separate section
2020-02-09 15:12:55 -06:00
76 changed files with 1643 additions and 1675 deletions

1
.gitpod.yml Normal file
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@@ -0,0 +1 @@
image: jpetazzo/shpod

View File

@@ -366,6 +366,34 @@ EOF
sudo systemctl start pinger"
}
_cmd tailhist "Install history viewer on port 1088"
_cmd_tailhist () {
TAG=$1
need_tag
pssh "
wget https://github.com/joewalnes/websocketd/releases/download/v0.3.0/websocketd-0.3.0_amd64.deb
sudo dpkg -i websocketd-0.3.0_amd64.deb
sudo mkdir -p /tmp/tailhist
sudo tee /root/tailhist.service <<EOF
[Unit]
Description=tailhist
[Install]
WantedBy=multi-user.target
[Service]
WorkingDirectory=/tmp/tailhist
ExecStart=/usr/bin/websocketd --port=1088 --staticdir=. sh -c \"tail -n +1 -f /home/docker/.history || echo 'Could not read history file. Perhaps you need to \\\"chmod +r .history\\\"?'\"
User=nobody
Group=nogroup
Restart=always
EOF
sudo systemctl enable /root/tailhist.service
sudo systemctl start tailhist"
pssh -I sudo tee /tmp/tailhist/index.html <lib/tailhist.html
}
_cmd opensg "Open the default security group to ALL ingress traffic"
_cmd_opensg() {
need_infra $1

View File

@@ -42,13 +42,15 @@ print("Generated ips.html")
try:
import pdfkit
paper_size = context["paper_size"]
margin = {"A4": "0.5cm", "Letter": "0.2in"}[paper_size]
with open("ips.html") as f:
pdfkit.from_file(f, "ips.pdf", options={
"page-size": context["paper_size"],
"margin-top": context["paper_margin"],
"margin-bottom": context["paper_margin"],
"margin-left": context["paper_margin"],
"margin-right": context["paper_margin"],
"page-size": paper_size,
"margin-top": margin,
"margin-bottom": margin,
"margin-left": margin,
"margin-right": margin,
})
print("Generated ips.pdf")
except ImportError:

View File

@@ -65,6 +65,15 @@ system("""sudo -u docker tee -a /home/docker/.bashrc <<SQRL
export PS1='\e[1m\e[31m[{}] \e[32m(\\$(docker-prompt)) \e[34m\u@\h\e[35m \w\e[0m\n$ '
SQRL""".format(ipv4))
# Bigger history, in a different file, and saved before executing each command
system("""sudo -u docker tee -a /home/docker/.bashrc <<SQRL
export HISTSIZE=9999
export HISTFILESIZE=9999
shopt -s histappend
trap 'history -a' DEBUG
export HISTFILE=~/.history
SQRL""")
# Custom .vimrc
system("""sudo -u docker tee /home/docker/.vimrc <<SQRL
syntax on

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@@ -0,0 +1,42 @@
<!DOCTYPE html>
<html>
<head>
<title>bash history</title>
<style>
#log {
font: bold 24px courier;
}
#log div:last-child {
background: yellow;
}
</style>
</head>
<body>
<div id="log"></div>
<script>
var ws = new WebSocket('ws://' + (location.host ? location.host : "localhost:8080") + "/");
var log = document.getElementById('log');
var echo = function(text) {
var line = document.createElement('div');
line.textContent = text;
log.appendChild(line);
line.scrollIntoView();
}
ws.onopen = function() {
document.body.style.backgroundColor = '#cfc';
};
ws.onclose = function() {
document.body.style.backgroundColor = '#fcc';
echo("Disconnected from server. Try to reload this page?");
};
ws.onmessage = function(event) {
echo(event.data);
};
</script>
</body>
</html>

49
prepare-vms/map-dns.py Executable file
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@@ -0,0 +1,49 @@
#!/usr/bin/env python
import os
import requests
import yaml
# configurable stuff
domains_file = "../../plentydomains/domains.txt"
config_file = os.path.join(
os.environ["HOME"], ".config/gandi/config.yaml")
tag = "test"
apiurl = "https://dns.api.gandi.net/api/v5/domains"
# inferred stuff
domains = open(domains_file).read().split()
apikey = yaml.safe_load(open(config_file))["apirest"]["key"]
ips = open(f"tags/{tag}/ips.txt").read().split()
settings_file = f"tags/{tag}/settings.yaml"
clustersize = yaml.safe_load(open(settings_file))["clustersize"]
# now do the fucking work
while domains and ips:
domain = domains[0]
domains = domains[1:]
cluster = ips[:clustersize]
ips = ips[clustersize:]
print(f"{domain} => {cluster}")
zone = ""
node = 0
for ip in cluster:
node += 1
zone += f"@ 300 IN A {ip}\n"
zone += f"* 300 IN A {ip}\n"
zone += f"node{node} 300 IN A {ip}\n"
r = requests.put(
f"{apiurl}/{domain}/records",
headers={"x-api-key": apikey},
data=zone)
print(r.text)
#r = requests.get(
# f"{apiurl}/{domain}/records",
# headers={"x-api-key": apikey},
# )
if domains:
print(f"Good, we have {len(domains)} domains left.")
if ips:
print(f"Crap, we have {len(ips)} IP addresses left.")

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@@ -10,13 +10,6 @@ cards_template: cards.html
# Use "Letter" in the US, and "A4" everywhere else
paper_size: A4
# 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

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@@ -10,13 +10,6 @@ cards_template: cards.html
# Use "Letter" in the US, and "A4" everywhere else
paper_size: A4
# 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

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@@ -10,13 +10,6 @@ cards_template: cards.html
# Use "Letter" in the US, and "A4" everywhere else
paper_size: A4
# 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

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@@ -10,13 +10,6 @@ cards_template: cards.html
# Use "Letter" in the US, and "A4" everywhere else
paper_size: A4
# 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

View File

@@ -12,13 +12,6 @@ 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

View File

@@ -12,18 +12,11 @@ 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: stable
# These correspond to the version numbers visible on their respective GitHub release pages
compose_version: 1.24.1
compose_version: 1.25.4
machine_version: 0.15.0
# Password used to connect with the "docker user"

View File

@@ -10,19 +10,13 @@ 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: stable
# These correspond to the version numbers visible on their respective GitHub release pages
compose_version: 1.24.1
compose_version: 1.25.4
machine_version: 0.14.0
# Password used to connect with the "docker user"
docker_user_password: training

View File

@@ -12,13 +12,6 @@ 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: stable

View File

@@ -12,13 +12,6 @@ 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: stable

View File

@@ -18,8 +18,14 @@
| default("kube") -%}
{%- set clusternumber = clusternumber
| default(None) -%}
{%- if qrcode == True -%}
{%- set qrcode = "https://container.training/q" -%}
{%- elif qrcode -%}
{%- set qrcode = qrcode -%}
{%- endif -%}
{%- set image_src = {
{# You can also set img_bottom_src instead. #}
{%- set img_logo_src = {
"docker": "https://s3-us-west-2.amazonaws.com/www.breadware.com/integrations/docker.png",
"swarm": "https://cdn.wp.nginx.com/wp-content/uploads/2016/07/docker-swarm-hero2.png",
"kube": "https://avatars1.githubusercontent.com/u/13629408",
@@ -85,9 +91,33 @@
{%- endif -%}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head><style>
<head>
<style>
@import url('https://fonts.googleapis.com/css?family=Slabo+27px');
{% if paper_size == "A4" %}
@page {
size: A4; /* Change from the default size of A4 */
margin: 0.5cm; /* Set margin on each page */
}
body {
/* this is A4 minus 0.5cm margins */
width: 20cm;
height: 28.7cm;
}
{% elif paper_size == "Letter" %}
@page {
size: Letter;
margin: 0.2in;
}
body {
/* this is Letter minus 0.2in margins */
width: 8.6in;
heigth: 10.6in;
}
{% endif %}
body, table {
margin: 0;
padding: 0;
@@ -108,53 +138,45 @@ div {
float: left;
border: 1px dotted black;
{% if backside %}
height: 31%;
height: 33%;
{% endif %}
padding-top: 1%;
padding-bottom: 1%;
/* columns * (width+left+right) < 100% */
/*
width: 21.5%;
padding-left: 1.5%;
padding-right: 1.5%;
width: 24.8%;
*/
/**/
width: 30%;
padding-left: 1.5%;
padding-right: 1.5%;
width: 33%;
/**/
}
p {
margin: 0.4em 0 0.4em 0;
margin: 0.8em;
}
div.back {
border: 1px dotted white;
border: 1px dotted grey;
}
div.back p {
margin: 0.5em 1em 0 1em;
span.scale {
white-space: nowrap;
}
img {
height: 4em;
img.logo {
height: 4.5em;
float: right;
margin-right: -0.2em;
}
img.bottom {
height: 2.5em;
display: block;
margin: 0.5em auto;
}
/*
img.enix {
height: 4.0em;
margin-top: 0.4em;
.qrcode img {
width: 40%;
margin: 1em;
}
img.kube {
height: 4.2em;
margin-top: 1.7em;
}
*/
.logpass {
font-family: monospace;
font-weight: bold;
@@ -164,16 +186,43 @@ img.kube {
page-break-after: always;
clear: both;
display: block;
height: 8px;
height: 0;
}
</style></head>
<body>
</style>
<script type="text/javascript" src="https://cdn.rawgit.com/davidshimjs/qrcodejs/gh-pages/qrcode.min.js"></script>
<script type="text/javascript">
function qrcodes() {
[].forEach.call(
document.getElementsByClassName("qrcode"),
(e, index) => {
new QRCode(e, {
text: "{{ qrcode }}",
correctLevel: QRCode.CorrectLevel.L
});
}
);
}
function scale() {
[].forEach.call(
document.getElementsByClassName("scale"),
(e, index) => {
var text_width = e.getBoundingClientRect().width;
var box_width = e.parentElement.getBoundingClientRect().width;
var percent = 100 * box_width / text_width + "%";
e.style.fontSize = percent;
}
);
}
</script>
</head>
<body onload="qrcodes(); scale();">
{% for cluster in clusters %}
<div>
<p>{{ intro }}</p>
<p>
{% if image_src %}
<img src="{{ image_src }}" />
{% if img_logo_src %}
<img class="logo" src="{{ img_logo_src }}" />
{% endif %}
<table>
{% if clusternumber != None %}
@@ -202,7 +251,12 @@ img.kube {
<p>
{% if url %}
{{ slides_are_at }}
<center>{{ url }}</center>
<p>
<span class="scale">{{ url }}</span>
</p>
{% endif %}
{% if img_bottom_src %}
<img class="bottom" src="{{ img_bottom_src }}" />
{% endif %}
</p>
</div>
@@ -211,18 +265,21 @@ img.kube {
{% if backside %}
{% for x in range(pagesize) %}
<div class="back">
<br/>
<p>You got this at the workshop
<p>Thanks for attending
"Getting Started With Kubernetes and Container Orchestration"
during QCON London (March 2019).</p>
during CONFERENCE in Month YYYY!</p>
<p>If you liked that workshop,
I can train your team or organization
on Docker, container, and Kubernetes,
with curriculums of 1 to 5 days.
I can train your team, in person or
online, with custom courses of
any length and any level.
</p>
<p>Interested? Contact me at:</p>
{% if qrcode %}
<p>If you're interested, please scan that QR code to contact me:</p>
<span class="qrcode"></span>
{% else %}
<p>If you're interested, you can contact me at:</p>
{% endif %}
<p>jerome.petazzoni@gmail.com</p>
<p>Thank you!</p>
</div>
{% endfor %}
<span class="pagebreak"></span>

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@@ -6,5 +6,10 @@
# And this allows to do "git clone https://container.training".
/info/refs service=git-upload-pack https://github.com/jpetazzo/container.training/info/refs?service=git-upload-pack
/dockermastery https://www.udemy.com/course/docker-mastery/?referralCode=1410924A733D33635CCB
/kubernetesmastery https://www.udemy.com/course/kubernetesmastery/?referralCode=7E09090AF9B79E6C283F
#/dockermastery https://www.udemy.com/course/docker-mastery/?referralCode=1410924A733D33635CCB
#/kubernetesmastery https://www.udemy.com/course/kubernetesmastery/?referralCode=7E09090AF9B79E6C283F
/dockermastery https://www.udemy.com/course/docker-mastery/?couponCode=SWEETFEBSALEC1
/kubernetesmastery https://www.udemy.com/course/kubernetesmastery/?couponCode=SWEETFEBSALEC4
# Shortlink for the QRCode
/q /qrcode.html 200

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@@ -222,21 +222,63 @@ f9e8f1642759 About an hour ago /bin/sh -c apt-get install fi 1.627 MB
---
## Introducing JSON syntax
class: extra-details
Most Dockerfile arguments can be passed in two forms:
## Why `sh -c`?
* plain string:
* On UNIX, to start a new program, we need two system calls:
- `fork()`, to create a new child process;
- `execve()`, to replace the new child process with the program to run.
* Conceptually, `execve()` works like this:
`execve(program, [list, of, arguments])`
* When we run a command, e.g. `ls -l /tmp`, something needs to parse the command.
(i.e. split the program and its arguments into a list.)
* The shell is usually doing that.
(It also takes care of expanding environment variables and special things like `~`.)
---
class: extra-details
## Why `sh -c`?
* When we do `RUN ls -l /tmp`, the Docker builder needs to parse the command.
* Instead of implementing its own parser, it outsources the job to the shell.
* That's why we see `sh -c ls -l /tmp` in that case.
* But we can also do the parsing jobs ourselves.
* This means passing `RUN` a list of arguments.
* This is called the *exec syntax*.
---
## Shell syntax vs exec syntax
Dockerfile commands that execute something can have two forms:
* plain string, or *shell syntax*:
<br/>`RUN apt-get install figlet`
* JSON list:
* JSON list, or *exec syntax*:
<br/>`RUN ["apt-get", "install", "figlet"]`
We are going to change our Dockerfile to see how it affects the resulting image.
---
## Using JSON syntax in our Dockerfile
## Using exec syntax in our Dockerfile
Let's change our Dockerfile as follows!
@@ -254,7 +296,7 @@ $ docker build -t figlet .
---
## JSON syntax vs string syntax
## History with exec syntax
Compare the new history:
@@ -269,24 +311,55 @@ IMAGE CREATED CREATED BY SIZE
<missing> 4 days ago /bin/sh -c #(nop) ADD file:b 187.8 MB
```
* JSON syntax specifies an *exact* command to execute.
* Exec syntax specifies an *exact* command to execute.
* String syntax specifies a command to be wrapped within `/bin/sh -c "..."`.
* Shell syntax specifies a command to be wrapped within `/bin/sh -c "..."`.
---
## When to use JSON syntax and string syntax
## When to use exec syntax and shell syntax
* String syntax:
* shell syntax:
* is easier to write
* interpolates environment variables and other shell expressions
* creates an extra process (`/bin/sh -c ...`) to parse the string
* requires `/bin/sh` to exist in the container
* JSON syntax:
* exec syntax:
* is harder to write (and read!)
* passes all arguments without extra processing
* doesn't create an extra process
* doesn't require `/bin/sh` to exist in the container
---
## Pro-tip: the `exec` shell built-in
POSIX shells have a built-in command named `exec`.
`exec` should be followed by a program and its arguments.
From a user perspective:
- it looks like the shell exits right away after the command execution,
- in fact, the shell exits just *before* command execution;
- or rather, the shell gets *replaced* by the command.
---
## Example using `exec`
```dockerfile
CMD exec figlet -f script hello
```
In this example, `sh -c` will still be used, but
`figlet` will be PID 1 in the container.
The shell gets replaced by `figlet` when `figlet` starts execution.
This allows to run processes as PID 1 without using JSON.

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@@ -13,7 +13,7 @@
viewBox="0 0 1600 900"
version="1.1"
id="svg696"
sodipodi:docname="how-k8s-works-3.svg"
sodipodi:docname="03.svg"
inkscape:version="0.92.4 5da689c313, 2019-01-14"
enable-background="new">
<metadata
@@ -42,12 +42,12 @@
id="namedview698"
showgrid="false"
inkscape:zoom="0.64"
inkscape:cx="796.38378"
inkscape:cx="521.38378"
inkscape:cy="596.50212"
inkscape:window-x="0"
inkscape:window-y="18"
inkscape:window-y="1098"
inkscape:window-maximized="0"
inkscape:current-layer="g4090"
inkscape:current-layer="g3333"
units="px"
inkscape:snap-object-midpoints="true" />
<title
@@ -561,17 +561,17 @@
id="tspan3660"
y="334.98642"
x="-215.28352"
sodipodi:role="line">$ kubectl run web \</tspan><tspan
sodipodi:role="line">$ kubectl create \</tspan><tspan
style="stroke-width:0.89526182"
y="379.74951"
x="-215.28352"
sodipodi:role="line"
id="tspan4926"> --image=nginx \</tspan><tspan
id="tspan1139"> deployment web \</tspan><tspan
style="stroke-width:0.89526182"
y="424.5126"
x="-215.28352"
sodipodi:role="line"
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title: Kubernetes Intensive Course
attend: https://qconlondon.com/london2020/workshop/kubernetes-intro
#slides: https://qconuk2019.container.training/
slides: https://2020-03-qcon.container.training/
- date: 2020-03-05
country: uk
@@ -14,7 +14,7 @@
speaker: jpetazzo
title: Docker Intensive Course
attend: https://qconlondon.com/london2020/workshop/docker-intensive-course
#slides: https://qconuk2019.container.training/
slides: https://2020-03-qcon.container.training/
- date: 2020-02-03
country: fr
@@ -24,6 +24,7 @@
title: Fondamentaux Conteneurs et Docker (in French)
lang: fr
attend: https://enix.io/fr/services/formation/
slides: https://2020-02-enix.container.training/
- date: 2020-02-04
country: fr
@@ -33,6 +34,7 @@
title: Fondamentaux Orchestration et Kubernetes (in French)
lang: fr
attend: https://enix.io/fr/services/formation/
slides: https://2020-02-enix.container.training/
- date: 2020-02-05
country: fr
@@ -42,6 +44,7 @@
title: Kubernetes et Méthodologies DevOps (in French)
lang: fr
attend: https://enix.io/fr/services/formation/
slides: https://2020-02-enix.container.training/
- date: 2020-02-06
country: fr
@@ -51,6 +54,7 @@
title: Kubernetes Avancé (in French)
lang: fr
attend: https://enix.io/fr/services/formation/
slides: https://2020-02-enix.container.training/
- date: 2020-02-07
country: fr
@@ -60,6 +64,7 @@
title: Opérer Kubernetes (in French)
lang: fr
attend: https://enix.io/fr/services/formation/
slides: https://2020-02-enix.container.training/
- date: [2019-11-04, 2019-11-05]
country: de

View File

@@ -19,6 +19,8 @@ chapters:
- logistics.md
- containers/intro.md
- shared/about-slides.md
- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
-
#- containers/Docker_Overview.md

View File

@@ -19,6 +19,8 @@ chapters:
# - shared/logistics.md
- containers/intro.md
- shared/about-slides.md
#- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
- - containers/Docker_Overview.md
- containers/Docker_History.md

77
slides/intro-twodays.yml Normal file
View File

@@ -0,0 +1,77 @@
title: |
Introduction
to Containers
chat: "[Slack](https://dockercommunity.slack.com/messages/C7GKACWDV)"
#chat: "[Gitter](https://gitter.im/jpetazzo/workshop-yyyymmdd-city)"
gitrepo: github.com/jpetazzo/container.training
slides: http://container.training/
#slidenumberprefix: "#SomeHashTag &mdash; "
exclude:
- self-paced
chapters:
- shared/title.md
- logistics.md
- containers/intro.md
- shared/about-slides.md
- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
- # DAY 1
- containers/Docker_Overview.md
#- containers/Docker_History.md
- containers/Training_Environment.md
- containers/First_Containers.md
- containers/Background_Containers.md
- containers/Initial_Images.md
-
- containers/Building_Images_Interactively.md
- containers/Building_Images_With_Dockerfiles.md
- containers/Cmd_And_Entrypoint.md
- containers/Copying_Files_During_Build.md
- containers/Exercise_Dockerfile_Basic.md
-
- containers/Dockerfile_Tips.md
- containers/Multi_Stage_Builds.md
- containers/Publishing_To_Docker_Hub.md
- containers/Exercise_Dockerfile_Advanced.md
-
- containers/Naming_And_Inspecting.md
- containers/Labels.md
- containers/Start_And_Attach.md
- containers/Getting_Inside.md
- containers/Resource_Limits.md
- # DAY 2
- containers/Container_Networking_Basics.md
- containers/Network_Drivers.md
- containers/Container_Network_Model.md
-
- containers/Local_Development_Workflow.md
- containers/Working_With_Volumes.md
- containers/Compose_For_Dev_Stacks.md
- containers/Exercise_Composefile.md
-
- containers/Installing_Docker.md
- containers/Container_Engines.md
- containers/Init_Systems.md
- containers/Advanced_Dockerfiles.md
-
- containers/Application_Configuration.md
- containers/Logging.md
- containers/Orchestration_Overview.md
-
- shared/thankyou.md
- containers/links.md
#-
#- containers/Docker_Machine.md
#- containers/Ambassadors.md
#- containers/Namespaces_Cgroups.md
#- containers/Copy_On_Write.md
#- containers/Containers_From_Scratch.md
#- containers/Pods_Anatomy.md
#- containers/Ecosystem.md

View File

@@ -352,7 +352,7 @@ We demonstrated *update* and *watch* semantics.
- That's where the actual logic of Kubernetes lives
- When we create a Deployment (e.g. with `kubectl run web --image=nginx`),
- When we create a Deployment (e.g. with `kubectl create deployment web --image=nginx`),
- we create a Deployment object

View File

@@ -162,6 +162,8 @@ class: extra-details
---
class: extra-details
## What's BGP?
- BGP (Border Gateway Protocol) is the protocol used between internet routers
@@ -220,6 +222,22 @@ class: extra-details
---
class: extra-details
## Checking the CNI configuration
- By default, kubelet gets the CNI configuration from `/etc/cni/net.d`
.exercise[
- Check the content of `/etc/cni/net.d`
]
(On most machines, at this point, `/etc/cni/net.d` doesn't even exist).)
---
## Our control plane
- We will use a Compose file to start the control plane
@@ -358,6 +376,26 @@ Note: the DaemonSet won't create any pods (yet) since there are no nodes (yet).
---
class: extra-details
## Checking the CNI configuration
- At this point, kuberouter should have installed its CNI configuration
(in `/etc/cni/net.d`)
.exercise[
- Check the content of `/etc/cni/net.d`
]
- There should be a file created by kuberouter
- The file should contain the node's podCIDR
---
## Setting up a test
- Let's create a Deployment and expose it with a Service
@@ -405,6 +443,8 @@ This shows that we are using IPVS (vs. iptables, which picked random endpoints).
---
class: extra-details
## Troubleshooting
- What if we need to check that everything is working properly?
@@ -428,6 +468,8 @@ We should see the local pod CIDR connected to `kube-bridge`, and the other nodes
---
class: extra-details
## More troubleshooting
- We can also look at the output of the kube-router pods
@@ -444,6 +486,8 @@ We should see the local pod CIDR connected to `kube-bridge`, and the other nodes
---
class: extra-details
## Trying `kubectl logs` / `kubectl exec`
.exercise[
@@ -469,6 +513,8 @@ What does that mean?
---
class: extra-details
## Internal name resolution
- To execute these commands, the API server needs to connect to kubelet
@@ -485,6 +531,8 @@ What does that mean?
---
class: extra-details
## Another way to check the logs
- We can also ask the logs directly to the container engine
@@ -526,163 +574,3 @@ done
- This could be useful for embedded platforms with very limited resources
(or lab environments for learning purposes)
---
# Interconnecting clusters
- We assigned different Cluster CIDRs to each cluster
- This allows us to connect our clusters together
- We will leverage kube-router BGP abilities for that
- We will *peer* each kube-router instance with a *route reflector*
- As a result, we will be able to ping each other's pods
---
## Disclaimers
- There are many methods to interconnect clusters
- Depending on your network implementation, you will use different methods
- The method shown here only works for nodes with direct layer 2 connection
- We will often need to use tunnels or other network techniques
---
## The plan
- Someone will start the *route reflector*
(typically, that will be the person presenting these slides!)
- We will update our kube-router configuration
- We will add a *peering* with the route reflector
(instructing kube-router to connect to it and exchange route information)
- We should see the routes to other clusters on our nodes
(in the output of e.g. `route -n` or `ip route show`)
- We should be able to ping pods of other nodes
---
## Starting the route reflector
- Only do this slide if you are doing this on your own
- There is a Compose file in the `compose/frr-route-reflector` directory
- Before continuing, make sure that you have the IP address of the route reflector
---
## Configuring kube-router
- This can be done in two ways:
- with command-line flags to the `kube-router` process
- with annotations to Node objects
- We will use the command-line flags
(because it will automatically propagate to all nodes)
.footnote[Note: with Calico, this is achieved by creating a BGPPeer CRD.]
---
## Updating kube-router configuration
- We need to pass two command-line flags to the kube-router process
.exercise[
- Edit the `kuberouter.yaml` file
- Add the following flags to the kube-router arguments:
```
- "--peer-router-ips=`X.X.X.X`"
- "--peer-router-asns=64512"
```
(Replace `X.X.X.X` with the route reflector address)
- Update the DaemonSet definition:
```bash
kubectl apply -f kuberouter.yaml
```
]
---
## Restarting kube-router
- The DaemonSet will not update the pods automatically
(it is using the default `updateStrategy`, which is `OnDelete`)
- We will therefore delete the pods
(they will be recreated with the updated definition)
.exercise[
- Delete all the kube-router pods:
```bash
kubectl delete pods -n kube-system -l k8s-app=kube-router
```
]
Note: the other `updateStrategy` for a DaemonSet is RollingUpdate.
<br/>
For critical services, we might want to precisely control the update process.
---
## Checking peering status
- We can see informative messages in the output of kube-router:
```
time="2019-04-07T15:53:56Z" level=info msg="Peer Up"
Key=X.X.X.X State=BGP_FSM_OPENCONFIRM Topic=Peer
```
- We should see the routes of the other clusters show up
- For debugging purposes, the reflector also exports a route to 1.0.0.2/32
- That route will show up like this:
```
1.0.0.2 172.31.X.Y 255.255.255.255 UGH 0 0 0 eth0
```
- We should be able to ping the pods of other clusters!
---
## If we wanted to do more ...
- kube-router can also export ClusterIP addresses
(by adding the flag `--advertise-cluster-ip`)
- They are exported individually (as /32)
- This would allow us to easily access other clusters' services
(without having to resolve the individual addresses of pods)
- Even better if it's combined with DNS integration
(to facilitate name → ClusterIP resolution)

View File

@@ -71,7 +71,7 @@
(straightforward on CPU; more complex on other metrics)
- Ressource management and scheduling
- Resource management and scheduling
(reserve CPU/RAM for containers; placement constraints)

View File

@@ -5,63 +5,63 @@ They say, "a picture is worth one thousand words."
The following 19 slides show what really happens when we run:
```bash
kubectl run web --image=nginx --replicas=3
kubectl create deployment web --image=nginx
```
---
class: pic
![](images/kubectl-run-slideshow/01.svg)
![](images/kubectl-create-deployment-slideshow/01.svg)
---
class: pic
![](images/kubectl-run-slideshow/02.svg)
![](images/kubectl-create-deployment-slideshow/02.svg)
---
class: pic
![](images/kubectl-run-slideshow/03.svg)
![](images/kubectl-create-deployment-slideshow/03.svg)
---
class: pic
![](images/kubectl-run-slideshow/04.svg)
![](images/kubectl-create-deployment-slideshow/04.svg)
---
class: pic
![](images/kubectl-run-slideshow/05.svg)
![](images/kubectl-create-deployment-slideshow/05.svg)
---
class: pic
![](images/kubectl-run-slideshow/06.svg)
![](images/kubectl-create-deployment-slideshow/06.svg)
---
class: pic
![](images/kubectl-run-slideshow/07.svg)
![](images/kubectl-create-deployment-slideshow/07.svg)
---
class: pic
![](images/kubectl-run-slideshow/08.svg)
![](images/kubectl-create-deployment-slideshow/08.svg)
---
class: pic
![](images/kubectl-run-slideshow/09.svg)
![](images/kubectl-create-deployment-slideshow/09.svg)
---
class: pic
![](images/kubectl-run-slideshow/10.svg)
![](images/kubectl-create-deployment-slideshow/10.svg)
---
class: pic
![](images/kubectl-run-slideshow/11.svg)
![](images/kubectl-create-deployment-slideshow/11.svg)
---
class: pic
![](images/kubectl-run-slideshow/12.svg)
![](images/kubectl-create-deployment-slideshow/12.svg)
---
class: pic
![](images/kubectl-run-slideshow/13.svg)
![](images/kubectl-create-deployment-slideshow/13.svg)
---
class: pic
![](images/kubectl-run-slideshow/14.svg)
![](images/kubectl-create-deployment-slideshow/14.svg)
---
class: pic
![](images/kubectl-run-slideshow/15.svg)
![](images/kubectl-create-deployment-slideshow/15.svg)
---
class: pic
![](images/kubectl-run-slideshow/16.svg)
![](images/kubectl-create-deployment-slideshow/16.svg)
---
class: pic
![](images/kubectl-run-slideshow/17.svg)
![](images/kubectl-create-deployment-slideshow/17.svg)
---
class: pic
![](images/kubectl-run-slideshow/18.svg)
![](images/kubectl-create-deployment-slideshow/18.svg)
---
class: pic
![](images/kubectl-run-slideshow/19.svg)
![](images/kubectl-create-deployment-slideshow/19.svg)

View File

@@ -6,7 +6,7 @@
- Our goal is to build a minimal cluster allowing us to:
- create a Deployment (with `kubectl run` or `kubectl create deployment`)
- create a Deployment (with `kubectl create deployment`)
- expose it with a Service
- connect to that service

View File

@@ -172,7 +172,7 @@ Note: we don't need to specify `--validate=false` here.
## Advantage of YAML
- Using YAML (instead of `kubectl run`/`create`/etc.) allows to be *declarative*
- Using YAML (instead of `kubectl create <kind>`) allows to be *declarative*
- The YAML describes the desired state of our cluster and applications
@@ -194,7 +194,7 @@ Note: we don't need to specify `--validate=false` here.
## YAML in practice
- Get started with `kubectl run`/`create`/`expose`/etc.
- Get started with `kubectl create deployment` and `kubectl expose`
- Dump the YAML with `kubectl get -o yaml`

View File

@@ -0,0 +1,31 @@
# Exercise — ConfigMaps
- In this exercise, we will use a ConfigMap to store static assets
- While there are some circumstances where this can be useful ...
- ... It is generally **not** a good idea!
- Once you've read that warning, check the next slide for instructions :)
---
## Exercise — ConfigMaps
This will use the wordsmith app.
We want to store the static files (served by `web`) in a ConfigMap.
1. Transform the `static` directory into a ConfigMap.
(https://github.com/jpetazzo/wordsmith/tree/master/web/static)
2. Find out where that `static` directory is located in `web`.
(for instance, by using `kubectl exec` to investigate)
3. Update the definition of the `web` Deployment to use the ConfigMap.
(note: fonts and images will be broken; that's OK)
4. Make a minor change in the ConfigMap (e.g. change the text color)

View File

@@ -0,0 +1,63 @@
# Exercise — Helm charts
Let's write a Helm chart for wordsmith!
We will need the YAML manifests that we wrote earlier.
Level 1: create a chart to deploy wordsmith.
Level 2: make it so that the number of replicas can be set with `--set replicas=X`.
Level 3: change the colors of the lego bricks.
(For level 3, fork the repository and use ctr.run to build images.)
See next slide if you need hints!
---
## Hints
*Scroll one slide at a time to see hints.*
--
Use `helm create` to create a new chart.
--
Delete the content of the `templates` directory and put your YAML instead.
--
Install the resulting chart. Voilà!
--
Use `{{ .Values.replicas }}` in the YAML manifest for `words`.
--
Also add `replicas: 5` to `values.yaml` to provide a default value.
---
## Changing the color
- Fork the repository
- Make sure that your fork has valid Dockerfiles
(or identify a branch that has valid Dockerfiles)
- Use the following images:
ctr.run/yourgithubusername/wordsmith/db:branchname
(replace db with web and words for the other components)
- Change the images and/or CSS in `web/static`
- Commit, push, trigger a rolling update
(`imagePullPolicy` should be `Always`, which is the default)

View File

@@ -0,0 +1,39 @@
# Exercise — deploying on Kubernetes
Let's deploy the wordsmith app on Kubernetes!
As a reminder, we have the following components:
| Name | Image | Port |
|-------|---------------------------------|------|
| db | jpetazzo/wordsmith-db:latest | 5432 |
| web | jpetazzo/wordsmith-web:latest | 80 |
| words | jpetazzo/wordsmith-words:latest | 8080 |
We need `web` to be available from outside the cluster.
See next slide if you need hints!
---
## Hints
*Scroll one slide at a time to see hints.*
--
- For each component, we need to create a deployment and a service
--
- Deployments can be created with `kubectl create deployment`
--
- Services can be created with `kubectl expose`
--
- Public services (like `web`) need to use a special type
(e.g. `NodePort`)

View File

@@ -0,0 +1,77 @@
# Exercise — writing YAML
Let's write YAML manifests for the wordsmith app!
It can be a single YAML file or multiple files in a directory.
See next slides for testing instructions and hints.
---
## How to test our YAML
If `XYZ` is that YAML file (or directory with YAML files), we should be able to:
1. Create a new namespace, e.g. `foo123`
2. Deploy wordsmith with a single command
(e.g. `kubectl apply --namespace foo123 -f XYZ`)
3. Find out the connection information for `web`
(e.g. `kubectl get service web --namespace`)
4. Connect to it and see the wordsmith app
See next slide for hints.
---
## Strategies
There are at least three methods to write our YAML.
1. Dump the YAML of existing wordsmith deployments and services.
(we can dump YAML with `kubectl get -o yaml ...`)
2. Adapt existing YAML (from the docs or dockercoins).
(for reference, kubercoins is at https://github.com/jpetazzo/kubercoins)
3. Write it entirely from scratch.
See next slide for more hints.
---
## Adapting YAML
*Scroll one slide at a time to see hints.*
--
One option is to start with the YAML from kubercoins.
(see https://github.com/jpetazzo/kubercoins)
--
Adapt the YAML of a deployment (e.g. worker) to run "web".
--
We need to change the name, labels, selectors, and image.
--
Then adapt the YAML of a service (e.g. webui).
--
We need to change the name, labels, selectors, possibly port number.
--
Repeat for the other components.

157
slides/k8s/interco.md Normal file
View File

@@ -0,0 +1,157 @@
# Interconnecting clusters
- We assigned different Cluster CIDRs to each cluster
- This allows us to connect our clusters together
- We will leverage kube-router BGP abilities for that
- We will *peer* each kube-router instance with a *route reflector*
- As a result, we will be able to ping each other's pods
---
## Disclaimers
- There are many methods to interconnect clusters
- Depending on your network implementation, you will use different methods
- The method shown here only works for nodes with direct layer 2 connection
- We will often need to use tunnels or other network techniques
---
## The plan
- Someone will start the *route reflector*
(typically, that will be the person presenting these slides!)
- We will update our kube-router configuration
- We will add a *peering* with the route reflector
(instructing kube-router to connect to it and exchange route information)
- We should see the routes to other clusters on our nodes
(in the output of e.g. `route -n` or `ip route show`)
- We should be able to ping pods of other nodes
---
## Starting the route reflector
- Only do this slide if you are doing this on your own
- There is a Compose file in the `compose/frr-route-reflector` directory
- Before continuing, make sure that you have the IP address of the route reflector
---
## Configuring kube-router
- This can be done in two ways:
- with command-line flags to the `kube-router` process
- with annotations to Node objects
- We will use the command-line flags
(because it will automatically propagate to all nodes)
.footnote[Note: with Calico, this is achieved by creating a BGPPeer CRD.]
---
## Updating kube-router configuration
- We need to pass two command-line flags to the kube-router process
.exercise[
- Edit the `kuberouter.yaml` file
- Add the following flags to the kube-router arguments:
```
- "--peer-router-ips=`X.X.X.X`"
- "--peer-router-asns=64512"
```
(Replace `X.X.X.X` with the route reflector address)
- Update the DaemonSet definition:
```bash
kubectl apply -f kuberouter.yaml
```
]
---
## Restarting kube-router
- The DaemonSet will not update the pods automatically
(it is using the default `updateStrategy`, which is `OnDelete`)
- We will therefore delete the pods
(they will be recreated with the updated definition)
.exercise[
- Delete all the kube-router pods:
```bash
kubectl delete pods -n kube-system -l k8s-app=kube-router
```
]
Note: the other `updateStrategy` for a DaemonSet is RollingUpdate.
<br/>
For critical services, we might want to precisely control the update process.
---
## Checking peering status
- We can see informative messages in the output of kube-router:
```
time="2019-04-07T15:53:56Z" level=info msg="Peer Up"
Key=X.X.X.X State=BGP_FSM_OPENCONFIRM Topic=Peer
```
- We should see the routes of the other clusters show up
- For debugging purposes, the reflector also exports a route to 1.0.0.2/32
- That route will show up like this:
```
1.0.0.2 172.31.X.Y 255.255.255.255 UGH 0 0 0 eth0
```
- We should be able to ping the pods of other clusters!
---
## If we wanted to do more ...
- kube-router can also export ClusterIP addresses
(by adding the flag `--advertise-cluster-ip`)
- They are exported individually (as /32)
- This would allow us to easily access other clusters' services
(without having to resolve the individual addresses of pods)
- Even better if it's combined with DNS integration
(to facilitate name → ClusterIP resolution)

View File

@@ -151,9 +151,9 @@
## Creating a deployment for our HTTP server
- We *could* do `kubectl run httpenv --image=jpetazzo/httpenv` ...
- We will create a deployment with `kubectl create deployment`
- But since `kubectl run` is being deprecated, let's see how to use `kubectl create` instead
- Then we will scale it with `kubectl scale`
.exercise[

View File

@@ -10,14 +10,47 @@
- In that container in the pod, we are going to run a simple `ping` command
- Then we are going to start additional copies of the pod
--
- Sounds simple enough, right?
--
- Except ... that the `kubectl run` command changed in Kubernetes 1.18!
- We'll explain what has changed, and why
---
## Choose your own adventure
- First, let's check which version of Kubernetes we're running
.exercise[
- Check our API server version:
```bash
kubectl version
```
- Look at the **Server Version** in the second part of the output
]
- In the following slides, we will talk about 1.17- or 1.18+
(to indicate "up to Kubernetes 1.17" and "from Kubernetes 1.18")
---
## Starting a simple pod with `kubectl run`
- `kubectl run` is convenient to start a single pod
- We need to specify at least a *name* and the image we want to use
- Optionally, we can specify the command to run in the pod
.exercise[
- Let's ping the address of `localhost`, the loopback interface:
@@ -25,90 +58,289 @@
kubectl run pingpong --image alpine ping 127.0.0.1
```
<!-- ```hide kubectl wait deploy/pingpong --for condition=available``` -->
<!-- ```hide kubectl wait pod --selector=run=pingpong --for condition=ready``` -->
]
--
---
(Starting with Kubernetes 1.12, we get a message telling us that
`kubectl run` is deprecated. Let's ignore it for now.)
## What do we see?
- In Kubernetes 1.18+, the output tells us that a Pod is created:
```
pod/pingpong created
```
- In Kubernetes 1.17-, the output is much more verbose:
```
kubectl run --generator=deployment/apps.v1 is DEPRECATED
and will be removed in a future version. Use kubectl run
--generator=run-pod/v1 or kubectl create instead.
deployment.apps/pingpong created
```
- There is a deprecation warning ...
- ... And a Deployment was created instead of a Pod
🤔 What does that mean?
---
## Behind the scenes of `kubectl run`
## Show me all you got!
- Let's look at the resources that were created by `kubectl run`
- What resources were created by `kubectl run`?
.exercise[
- List most resource types:
- Let's ask Kubernetes to show us *all* the resources:
```bash
kubectl get all
```
]
Note: `kubectl get all` is a lie. It doesn't show everything.
(But it shows a lot of "usual suspects", i.e. commonly used resources.)
---
## The situation with Kubernetes 1.18+
```
NAME READY STATUS RESTARTS AGE
pod/pingpong 1/1 Running 0 9s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 3h30m
```
We wanted a pod, we got a pod, named `pingpong`. Great!
(We can ignore `service/kubernetes`, it was already there before.)
---
## The situation with Kubernetes 1.17-
```
NAME READY STATUS RESTARTS AGE
pod/pingpong-6ccbc77f68-kmgfn 1/1 Running 0 11s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 3h45
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/pingpong 1/1 1 1 11s
NAME DESIRED CURRENT READY AGE
replicaset.apps/pingpong-6ccbc77f68 1 1 1 11s
```
Our pod is not named `pingpong`, but `pingpong-xxxxxxxxxxx-yyyyy`.
We have a Deployment named `pingpong`, and an extra Replica Set, too. What's going on?
---
## From Deployment to Pod
We have the following resources:
- `deployment.apps/pingpong`
This is the Deployment that we just created.
- `replicaset.apps/pingpong-xxxxxxxxxx`
This is a Replica Set created by this Deployment.
- `pod/pingpong-xxxxxxxxxx-yyyyy`
This is a *pod* created by the Replica Set.
Let's explain what these things are.
---
## Pod
- Can have one or multiple containers
- Runs on a single node
(Pod cannot "straddle" multiple nodes)
- Pods cannot be moved
(e.g. in case of node outage)
- Pods cannot be scaled
(except by manually creating more Pods)
---
class: extra-details
## Pod details
- A Pod is not a process; it's an environment for containers
- it cannot be "restarted"
- it cannot "crash"
- The containers in a Pod can crash
- They may or may not get restarted
(depending on Pod's restart policy)
- If all containers exit successfully, the Pod ends in "Succeeded" phase
- If some containers fail and don't get restarted, the Pod ends in "Failed" phase
---
## Replica Set
- Set of identical (replicated) Pods
- Defined by a pod template + number of desired replicas
- If there are not enough Pods, the Replica Set creates more
(e.g. in case of node outage; or simply when scaling up)
- If there are too many Pods, the Replica Set deletes some
(e.g. if a node was disconnected and comes back; or when scaling down)
- We can scale up/down a Replica Set
- we update the manifest of the Replica Set
- as a consequence, the Replica Set controller creates/deletes Pods
---
## Deployment
- Replica Sets control *identical* Pods
- Deployments are used to roll out different Pods
(different image, command, environment variables, ...)
- When we update a Deployment with a new Pod definition:
- a new Replica Set is created with the new Pod definition
- that new Replica Set is progressively scaled up
- meanwhile, the old Replica Set(s) is(are) scaled down
- This is a *rolling update*, minimizing application downtime
- When we scale up/down a Deployment, it scales up/down its Replica Set
---
## `kubectl run` through the ages
- When we want to run an app on Kubernetes, we *generally* want a Deployment
- Up to Kubernetes 1.17, `kubectl run` created a Deployment
- it could also create other things, by using special flags
- this was powerful, but potentially confusing
- creating a single Pod was done with `kubectl run --restart=Never`
- other resources could also be created with `kubectl create ...`
- From Kubernetes 1.18, `kubectl run` creates a Pod
- other kinds of resources can still be created with `kubectl create`
---
## Creating a Deployment the proper way
- Let's destroy that `pingpong` app that we created
- Then we will use `kubectl create deployment` to re-create it
.exercise[
- On Kubernetes 1.18+, delete the Pod named `pingpong`:
```bash
kubectl delete pod pingpong
```
- On Kubernetes 1.17-, delete the Deployment named `pingpong`:
```bash
kubectl delete deployment pingpong
```
]
---
## Running `ping` in a Deployment
<!-- ##VERSION## -->
- When using `kubectl create deployment`, we cannot indicate the command to execute
(at least, not in Kubernetes 1.18)
- We can:
- write a custom YAML manifest for our Deployment
--
We should see the following things:
- `deployment.apps/pingpong` (the *deployment* that we just created)
- `replicaset.apps/pingpong-xxxxxxxxxx` (a *replica set* created by the deployment)
- `pod/pingpong-xxxxxxxxxx-yyyyy` (a *pod* created by the replica set)
- (yeah right ... too soon!)
Note: as of 1.10.1, resource types are displayed in more detail.
--
- use an image that has the command to execute baked in
- (much easier!)
--
- We will use the image `jpetazzo/ping`
(it has a default command of `ping 127.0.0.1`)
---
## What are these different things?
## Creating a Deployment running `ping`
- A *deployment* is a high-level construct
- Let's create a Deployment named `pingpong`
- allows scaling, rolling updates, rollbacks
- It will use the image `jpetazzo/ping`
- multiple deployments can be used together to implement a
[canary deployment](https://kubernetes.io/docs/concepts/cluster-administration/manage-deployment/#canary-deployments)
.exercise[
- delegates pods management to *replica sets*
- Create the Deployment:
```bash
kubectl create deployment pingpong --image=jpetazzo/ping
```
- A *replica set* is a low-level construct
- Check the resources that were created:
```bash
kubectl get all
```
- makes sure that a given number of identical pods are running
<!-- ```hide kubectl wait pod --selector=run=pingpong --for condition=ready ``` -->
- allows scaling
- rarely used directly
- A *replication controller* is the (deprecated) predecessor of a replica set
---
## Our `pingpong` deployment
- `kubectl run` created a *deployment*, `deployment.apps/pingpong`
```
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
deployment.apps/pingpong 1 1 1 1 10m
```
- That deployment created a *replica set*, `replicaset.apps/pingpong-xxxxxxxxxx`
```
NAME DESIRED CURRENT READY AGE
replicaset.apps/pingpong-7c8bbcd9bc 1 1 1 10m
```
- That replica set created a *pod*, `pod/pingpong-xxxxxxxxxx-yyyyy`
```
NAME READY STATUS RESTARTS AGE
pod/pingpong-7c8bbcd9bc-6c9qz 1/1 Running 0 10m
```
- We'll see later how these folks play together for:
- scaling, high availability, rolling updates
]
---
@@ -294,132 +526,6 @@ Let's leave `kubectl logs` running while we keep exploring.
---
## What if we wanted something different?
- What if we wanted to start a "one-shot" container that *doesn't* get restarted?
- We could use `kubectl run --restart=OnFailure` or `kubectl run --restart=Never`
- These commands would create *jobs* or *pods* instead of *deployments*
- Under the hood, `kubectl run` invokes "generators" to create resource descriptions
- We could also write these resource descriptions ourselves (typically in YAML),
<br/>and create them on the cluster with `kubectl apply -f` (discussed later)
- With `kubectl run --schedule=...`, we can also create *cronjobs*
---
## Scheduling periodic background work
- A Cron Job is a job that will be executed at specific intervals
(the name comes from the traditional cronjobs executed by the UNIX crond)
- It requires a *schedule*, represented as five space-separated fields:
- minute [0,59]
- hour [0,23]
- day of the month [1,31]
- month of the year [1,12]
- day of the week ([0,6] with 0=Sunday)
- `*` means "all valid values"; `/N` means "every N"
- Example: `*/3 * * * *` means "every three minutes"
---
## Creating a Cron Job
- Let's create a simple job to be executed every three minutes
- Cron Jobs need to terminate, otherwise they'd run forever
.exercise[
- Create the Cron Job:
```bash
kubectl run every3mins --schedule="*/3 * * * *" --restart=OnFailure \
--image=alpine sleep 10
```
- Check the resource that was created:
```bash
kubectl get cronjobs
```
]
---
## Cron Jobs in action
- At the specified schedule, the Cron Job will create a Job
- The Job will create a Pod
- The Job will make sure that the Pod completes
(re-creating another one if it fails, for instance if its node fails)
.exercise[
- Check the Jobs that are created:
```bash
kubectl get jobs
```
]
(It will take a few minutes before the first job is scheduled.)
---
## What about that deprecation warning?
- As we can see from the previous slide, `kubectl run` can do many things
- The exact type of resource created is not obvious
- To make things more explicit, it is better to use `kubectl create`:
- `kubectl create deployment` to create a deployment
- `kubectl create job` to create a job
- `kubectl create cronjob` to run a job periodically
<br/>(since Kubernetes 1.14)
- Eventually, `kubectl run` will be used only to start one-shot pods
(see https://github.com/kubernetes/kubernetes/pull/68132)
---
## Various ways of creating resources
- `kubectl run`
- easy way to get started
- versatile
- `kubectl create <resource>`
- explicit, but lacks some features
- can't create a CronJob before Kubernetes 1.14
- can't pass command-line arguments to deployments
- `kubectl create -f foo.yaml` or `kubectl apply -f foo.yaml`
- all features are available
- requires writing YAML
---
## Viewing logs of multiple pods
- When we specify a deployment name, only one single pod's logs are shown
@@ -428,13 +534,15 @@ Let's leave `kubectl logs` running while we keep exploring.
- A selector is a logic expression using *labels*
- Conveniently, when you `kubectl run somename`, the associated objects have a `run=somename` label
- If we check the pods created by the deployment, they all have the label `app=pingpong`
(this is just a default label that gets added when using `kubectl create deployment`)
.exercise[
- View the last line of log from all pods with the `run=pingpong` label:
- View the last line of log from all pods with the `app=pingpong` label:
```bash
kubectl logs -l run=pingpong --tail 1
kubectl logs -l app=pingpong --tail 1
```
]
@@ -449,7 +557,7 @@ Let's leave `kubectl logs` running while we keep exploring.
- Combine `-l` and `-f` flags:
```bash
kubectl logs -l run=pingpong --tail 1 -f
kubectl logs -l app=pingpong --tail 1 -f
```
<!--
@@ -480,7 +588,7 @@ class: extra-details
- Stream the logs:
```bash
kubectl logs -l run=pingpong --tail 1 -f
kubectl logs -l app=pingpong --tail 1 -f
```
<!-- ```wait error:``` -->
@@ -586,3 +694,195 @@ class: extra-details
- This is a quick way to check connectivity
(if we can reach 1.1, we probably have internet access)
---
## Creating other kinds of resources
- Deployments are great for stateless web apps
(as well as workers that keep running forever)
- Jobs are great for "long" background work
("long" being at least minutes our hours)
- CronJobs are great to schedule Jobs at regular intervals
(just like the classic UNIX `cron` daemon with its `crontab` files)
- Pods are great for one-off execution that we don't care about
(because they don't get automatically restarted if something goes wrong)
---
## Creating a Job
- A Job will create a Pod
- If the Pod fails, the Job will create another one
- The Job will keep trying until:
- either a Pod succeeds,
- or we hit the *backoff limit* of the Job (default=6)
.exercise[
- Create a Job that has a 50% chance of success:
```bash
kubectl create job flipcoin --image=alpine -- sh -c 'exit $(($RANDOM%2))'
```
]
---
## Our Job in action
- Our Job will create a Pod named `flipcoin-xxxxx`
- If the Pod succeeds, the Job stops
- If the Pod fails, the Job creates another Pod
.exercise[
- Check the status of the Pod(s) created by the Job:
```bash
kubectl get pods --selector=job-name=flipcoin
```
]
---
class: extra-details
## More advanced jobs
- We can specify a number of "completions" (default=1)
- This indicates how many times the Job must be executed
- We can specify the "parallelism" (default=1)
- This indicates how many Pods should be running in parallel
- These options cannot be specified with `kubectl create job`
(we have to write our own YAML manifest to use them)
---
## Scheduling periodic background work
- A Cron Job is a Job that will be executed at specific intervals
(the name comes from the traditional cronjobs executed by the UNIX crond)
- It requires a *schedule*, represented as five space-separated fields:
- minute [0,59]
- hour [0,23]
- day of the month [1,31]
- month of the year [1,12]
- day of the week ([0,6] with 0=Sunday)
- `*` means "all valid values"; `/N` means "every N"
- Example: `*/3 * * * *` means "every three minutes"
---
## Creating a Cron Job
- Let's create a simple job to be executed every three minutes
- Careful: make sure that the job terminates!
(The Cron Job will not hold if a previous job is still running)
.exercise[
- Create the Cron Job:
```bash
kubectl create cronjob every3mins --schedule="*/3 * * * *" \
--image=alpine -- sleep 10
```
- Check the resource that was created:
```bash
kubectl get cronjobs
```
]
---
## Cron Jobs in action
- At the specified schedule, the Cron Job will create a Job
- The Job will create a Pod
- The Job will make sure that the Pod completes
(re-creating another one if it fails, for instance if its node fails)
.exercise[
- Check the Jobs that are created:
```bash
kubectl get jobs
```
]
(It will take a few minutes before the first job is scheduled.)
---
class: extra-details
## What about `kubectl run` before v1.18?
- Creating a Deployment:
`kubectl run`
- Creating a Pod:
`kubectl run --restart=Never`
- Creating a Job:
`kubectl run --restart=OnFailure`
- Creating a Cron Job:
`kubectl run --restart=OnFailure --schedule=...`
*Avoid using these forms, as they are deprecated since Kubernetes 1.18!*
---
## Beyond `kubectl create`
- As hinted earlier, `kubectl create` doesn't always expose all options
- can't express parallelism or completions of Jobs
- can't express Pods with multiple containers
- can't express healthchecks, resource limits
- etc.
- `kubectl create` and `kubectl run` are *helpers* that generate YAML manifests
- If we write these manifests ourselves, we can use all features and options
- We'll see later how to do that!

View File

@@ -1,4 +1,4 @@
# What's next?
# Last words
- Congratulations!
@@ -189,6 +189,20 @@ are a few tools that can help us.*
---
## Developer experience
- How do we on-board a new developer?
- What do they need to install to get a dev stack?
- How does a code change make it from dev to prod?
- How does someone add a component to a stack?
*These questions are good "sanity checks" to validate our strategy!*
---
## Some guidelines
- Start small

View File

@@ -132,15 +132,15 @@ Exactly what we need!
- Everything created with `kubectl run` has a label `run`
- We can use that property to view the logs of all the pods created with `kubectl run`
- Everything created with `kubectl create deployment` has a label `app`
- Similarly, everything created with `kubectl create deployment` has a label `app`
- We can use that property to view the logs of all the pods created with `kubectl create deployment`
.exercise[
- View the logs for all the things started with `kubectl run`:
- View the logs for all the things started with `kubectl create deployment`:
```bash
stern -l run
stern -l app
```
<!--

View File

@@ -64,3 +64,19 @@ If it shows our nodes and their CPU and memory load, we're good!
]
- We can also use selectors (`-l app=...`)
---
## Other tools
- kube-capacity is a great CLI tool to view resources
(https://github.com/robscott/kube-capacity)
- It can show resource and limits, and compare them with usage
- It can show utilization per node, or per pod
- kube-resource-report can generate HTML reports
(https://github.com/hjacobs/kube-resource-report)

View File

@@ -570,7 +570,7 @@ After the Kibana UI loads, we need to click around a bit
## Deploying our apps with operators
- It is very simple to deploy with `kubectl run` / `kubectl expose`
- It is very simple to deploy with `kubectl create deployment` / `kubectl expose`
- We can unlock more features by writing YAML and using `kubectl apply`

View File

@@ -30,8 +30,6 @@
- Go to @@SLIDES@@ to view these slides
- Join the chat room: @@CHAT@@
<!-- ```open @@SLIDES@@``` -->
]

View File

@@ -1,8 +1,8 @@
## Versions installed
- Kubernetes 1.17.2
- Docker Engine 19.03.5
- Docker Compose 1.24.1
- Kubernetes 1.18.0
- Docker Engine 19.03.8
- Docker Compose 1.25.4
<!-- ##VERSION## -->
@@ -27,11 +27,11 @@ class: extra-details
*however ...*
- Kubernetes 1.15 validates Docker Engine versions [up to 18.09](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.15.md#dependencies)
- Kubernetes 1.15 validates Docker Engine versions [up to 18.09](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.15.md#dependencies)
<br/>
(the latest version when Kubernetes 1.14 was released)
- Kubernetes 1.13 only validates Docker Engine versions [up to 18.06](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.13.md#external-dependencies)
- Kubernetes 1.13 only validates Docker Engine versions [up to 18.06](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.13.md#external-dependencies)
- Is it a problem if I use Kubernetes with a "too recent" Docker Engine?

View File

@@ -209,19 +209,37 @@ And *then* it is time to look at orchestration!
## Managing stack deployments
- The best deployment tool will vary, depending on:
- Applications are made of many resources
- the size and complexity of your stack(s)
- how often you change it (i.e. add/remove components)
- the size and skills of your team
(Deployments, Services, and much more)
- A few examples:
- We need to automate the creation / update / management of these resources
- shell scripts invoking `kubectl`
- YAML resources descriptions committed to a repo
- [Helm](https://github.com/kubernetes/helm) (~package manager)
- [Spinnaker](https://www.spinnaker.io/) (Netflix' CD platform)
- [Brigade](https://brigade.sh/) (event-driven scripting; no YAML)
- There is no "absolute best" tool or method; it depends on:
- the size and complexity of our stack(s)
- how often we change it (i.e. add/remove components)
- the size and skills of our team
---
## A few tools to manage stacks
- Shell scripts invoking `kubectl`
- YAML resource manifests committed to a repo
- [Kustomize](https://github.com/kubernetes-sigs/kustomize)
(YAML manifests + patches applied on top)
- [Helm](https://github.com/kubernetes/helm)
(YAML manifests + templating engine)
- [Spinnaker](https://www.spinnaker.io/)
(Netflix' CD platform)
- [Brigade](https://brigade.sh/)
(event-driven scripting; no YAML)
---
@@ -260,17 +278,3 @@ Sorry Star Trek fans, this is not the federation you're looking for!
- Synchronize resources across clusters
- Discover resources across clusters
---
## Developer experience
*We've put this last, but it's pretty important!*
- How do you on-board a new developer?
- What do they need to install to get a dev stack?
- How does a code change make it from dev to prod?
- How does someone add a component to a stack?

View File

@@ -21,25 +21,33 @@ chapters:
- logistics.md
- k8s/intro.md
- shared/about-slides.md
- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
- - k8s/prereqs-admin.md
-
- k8s/prereqs-admin.md
- k8s/architecture.md
- k8s/deploymentslideshow.md
- k8s/dmuc.md
- - k8s/multinode.md
-
- k8s/multinode.md
- k8s/cni.md
- k8s/interco.md
-
- k8s/apilb.md
- k8s/control-plane-auth.md
- - k8s/setup-managed.md
- k8s/setup-selfhosted.md
#- k8s/setup-managed.md
#- k8s/setup-selfhosted.md
- k8s/cluster-upgrade.md
- k8s/staticpods.md
- k8s/cluster-backup.md
- k8s/cloud-controller-manager.md
- k8s/bootstrap.md
- - k8s/resource-limits.md
- k8s/metrics-server.md
- k8s/cluster-sizing.md
- k8s/horizontal-pod-autoscaler.md
- - k8s/lastwords-admin.md
- k8s/staticpods.md
-
#- k8s/cloud-controller-manager.md
#- k8s/bootstrap.md
- k8s/control-plane-auth.md
- k8s/podsecuritypolicy.md
- k8s/csr-api.md
- k8s/openid-connect.md
-
#- k8s/lastwords-admin.md
- k8s/links.md
- shared/thankyou.md

View File

@@ -21,6 +21,8 @@ chapters:
- logistics.md
- k8s/intro.md
- shared/about-slides.md
- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
# DAY 1
- - k8s/prereqs-admin.md
@@ -29,6 +31,7 @@ chapters:
- k8s/dmuc.md
- - k8s/multinode.md
- k8s/cni.md
- k8s/interco.md
- - k8s/apilb.md
- k8s/setup-managed.md
- k8s/setup-selfhosted.md
@@ -58,7 +61,7 @@ chapters:
- k8s/operators.md
###- k8s/operators-design.md
# CONCLUSION
- - k8s/lastwords-admin.md
- - k8s/lastwords.md
- k8s/links.md
- shared/thankyou.md
- |

View File

@@ -20,6 +20,8 @@ chapters:
- logistics.md
- k8s/intro.md
- shared/about-slides.md
- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
-
- shared/prereqs.md
@@ -44,6 +46,7 @@ chapters:
#- k8s/buildshiprun-selfhosted.md
- k8s/buildshiprun-dockerhub.md
- k8s/ourapponkube.md
#- k8s/exercise-wordsmith.md
-
- k8s/yamldeploy.md
- k8s/setup-k8s.md
@@ -53,6 +56,7 @@ chapters:
- shared/hastyconclusions.md
- k8s/daemonset.md
#- k8s/dryrun.md
#- k8s/exercise-yaml.md
#- k8s/localkubeconfig.md
#- k8s/accessinternal.md
#- k8s/kubectlproxy.md
@@ -69,6 +73,7 @@ chapters:
#- k8s/helm-create-basic-chart.md
#- k8s/helm-create-better-chart.md
#- k8s/helm-secrets.md
#- k8s/exercise-helm.md
#- k8s/create-chart.md
#- k8s/create-more-charts.md
#- k8s/netpol.md
@@ -77,6 +82,7 @@ chapters:
#- k8s/openid-connect.md
#- k8s/podsecuritypolicy.md
- k8s/volumes.md
#- k8s/exercise-configmap.md
#- k8s/build-with-docker.md
#- k8s/build-with-kaniko.md
- k8s/configuration.md
@@ -93,5 +99,6 @@ chapters:
#- k8s/gitworkflows.md
-
- k8s/whatsnext.md
- k8s/lastwords.md
- k8s/links.md
- shared/thankyou.md

View File

@@ -22,6 +22,8 @@ chapters:
- logistics-bridget.md
- k8s/intro.md
- shared/about-slides.md
- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
- - shared/prereqs.md
#- shared/webssh.md

View File

@@ -20,6 +20,8 @@ chapters:
#- logistics.md
- k8s/intro.md
- shared/about-slides.md
#- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
-
- shared/prereqs.md
@@ -45,6 +47,7 @@ chapters:
- k8s/buildshiprun-selfhosted.md
- k8s/buildshiprun-dockerhub.md
- k8s/ourapponkube.md
#- k8s/exercise-wordsmith.md
- k8s/yamldeploy.md
-
- k8s/setup-k8s.md
@@ -54,6 +57,7 @@ chapters:
- shared/hastyconclusions.md
- k8s/daemonset.md
- k8s/dryrun.md
#- k8s/exercise-yaml.md
-
- k8s/rollout.md
- k8s/healthchecks.md
@@ -72,6 +76,7 @@ chapters:
- k8s/helm-create-basic-chart.md
- k8s/helm-create-better-chart.md
- k8s/helm-secrets.md
#- k8s/exercise-helm.md
-
- k8s/netpol.md
- k8s/authn-authz.md
@@ -81,6 +86,7 @@ chapters:
- k8s/control-plane-auth.md
-
- k8s/volumes.md
#- k8s/exercise-configmap.md
- k8s/build-with-docker.md
- k8s/build-with-kaniko.md
-
@@ -112,6 +118,6 @@ chapters:
- k8s/cloud-controller-manager.md
- k8s/gitworkflows.md
-
- k8s/whatsnext.md
- k8s/lastwords.md
- k8s/links.md
- shared/thankyou.md

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@@ -20,6 +20,8 @@ chapters:
- logistics.md
- k8s/intro.md
- shared/about-slides.md
- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
-
- shared/prereqs.md
@@ -44,6 +46,7 @@ chapters:
#- k8s/buildshiprun-selfhosted.md
- k8s/buildshiprun-dockerhub.md
- k8s/ourapponkube.md
#- k8s/exercise-wordsmith.md
-
- k8s/yamldeploy.md
#- k8s/setup-k8s.md
@@ -53,6 +56,7 @@ chapters:
- shared/hastyconclusions.md
- k8s/daemonset.md
- k8s/dryrun.md
#- k8s/exercise-yaml.md
-
- k8s/localkubeconfig.md
- k8s/accessinternal.md
@@ -70,6 +74,7 @@ chapters:
- k8s/helm-create-basic-chart.md
- k8s/helm-create-better-chart.md
- k8s/helm-secrets.md
#- k8s/exercise-helm.md
-
- k8s/netpol.md
- k8s/authn-authz.md
@@ -78,6 +83,7 @@ chapters:
#- k8s/podsecuritypolicy.md
-
- k8s/volumes.md
#- k8s/exercise-configmap.md
#- k8s/build-with-docker.md
#- k8s/build-with-kaniko.md
- k8s/configuration.md
@@ -95,5 +101,6 @@ chapters:
#- k8s/gitworkflows.md
-
- k8s/whatsnext.md
- k8s/lastwords.md
- k8s/links.md
- shared/thankyou.md

11
slides/qrcode.html Normal file
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@@ -0,0 +1,11 @@
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Send an email to Jérôme</title>
<meta http-equiv="refresh" content="0;URL='mailto:jerome.petazzoni@gmail.com?subject=I%20was%20at%20your%20Docker/Kubernetes%20workshop%20in%20London.%20Can%20you%20train%20my%20team%3F
'" />
</head>
<body>
<p>Click <a href="mailto:jerome.petazzoni@gmail.com?subject=I%20was%20at%20your%20Docker/Kubernetes%20workshop%20in%20London.%20Can%20you%20train%20my%20team%3F">
here</a> to send an email to Jérôme to inquire about Docker/Kubernetes training.</p>
</body>
</html>

View File

@@ -73,19 +73,3 @@ class: extra-details
- you want only the most essential information
- You can review these slides another time if you want, they'll be waiting for you ☺
---
class: in-person, chat-room
## Chat room
- We've set up a chat room that we will monitor during the workshop
- Don't hesitate to use it to ask questions, or get help, or share feedback
- The chat room will also be available after the workshop
- Join the chat room: @@CHAT@@
- Say hi in the chat room!

View File

@@ -0,0 +1,11 @@
## Chat room
- We've set up a chat room that we will monitor during the workshop
- Don't hesitate to use it to ask questions, or get help, or share feedback
- The chat room will also be available after the workshop
- Join the chat room: @@CHAT@@
- Say hi in the chat room!

View File

@@ -0,0 +1,68 @@
## Use the chat!
- In the Zoom UI, click on "Chat" (at the bottom of the screen, in the middle)
- This will bring up the chat panel
- Say hi in the group chat!
- If you'd like, you can open the chat to its own separate window:
- click on the little `v` on the left of "Zoom Group Chat"
- select "Pop Out"
- We will be monitoring the Zoom chat during the whole training
- Don't hesitate to use it to ask questions, or get help, or share feedback
---
## Use non-verbal communication cues
- ... wait, what?!?
--
- In the Zoom UI, click on "Participants" (at the bottom of the screen, in the middle)
- This will bring up the list of participants
- You can pop it out if you like (just like the chat window)
- At the bottom of the list of participants, there are feedback buttons:
raise hand, yes, no, go slower, go faster
- If you click on "more" (on the right of these feedback buttons), you can also:
thumbs down, thumbs up, applause, need a break, away
- Click on "thumbs up" to let us know that everything is working fine!
---
## Use your webcam (if you'd like!)
- If you would like to turn on your webcam, feel free to do so
- You don't have to, but your teacher will appreciate it :)
(it's easier to teach and get feedback from human faces!)
- You are welcome to smile / frown / raise your hand ... through your webcam as well!
- Great metaphor, courtesy of
[Liz Howard](https://twitter.com/lizthedeveloper)):
*“It's just like being in a classroom.
<br/>People with their webcam on are in the front row;
<br/>people with their webcam off are in the back row.”*
---
## During the session
- We will often ask "yes/no" questions; use the corresponding buttons
- If you have a question, you can ask in the chat, or use "raise hand"

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@@ -50,8 +50,6 @@ Misattributed to Benjamin Franklin
- Go to @@SLIDES@@ to view these slides
- Join the chat room: @@CHAT@@
<!-- ```open @@SLIDES@@``` -->
]

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@@ -11,11 +11,16 @@ 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[.](https://www.youtube.com/watch?v=h16zyxiwDLY)*<br/>
*Thank you!*
**Slides: @@SLIDES@@**
**Slides[:](https://www.youtube.com/watch?v=h16zyxiwDLY) @@SLIDES@@**
]
<!--
WiFi: **Something**<br/>
Password: **Something**
**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!*
-->

View File

@@ -24,6 +24,8 @@ chapters:
- logistics.md
- swarm/intro.md
- shared/about-slides.md
- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
- - shared/prereqs.md
- shared/connecting.md

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@@ -24,6 +24,8 @@ chapters:
- logistics.md
- swarm/intro.md
- shared/about-slides.md
- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
- - shared/prereqs.md
- shared/connecting.md

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@@ -19,6 +19,8 @@ chapters:
#- shared/logistics.md
- swarm/intro.md
- shared/about-slides.md
#- shared/chat-room-im.md
#- shared/chat-room-zoom.md
- shared/toc.md
- - shared/prereqs.md
- shared/connecting.md