Add osm tutorial and docs

Signed-off-by: Johnson Shi <Johnson.Shi@microsoft.com>
This commit is contained in:
Johnson Shi
2021-08-20 14:25:47 -07:00
parent 8ee3d5835a
commit 82e490a875
11 changed files with 415 additions and 21 deletions
+1
View File
@@ -13,3 +13,4 @@ redirects:
usage/skipper-progressive-delivery: tutorials/skipper-progressive-delivery.md
usage/crossover-progressive-delivery: tutorials/crossover-progressive-delivery.md
usage/traefik-progressive-delivery: tutorials/traefik-progressive-delivery.md
usage/osm-progressive-delivery: tutorials/osm-progressive-delivery.md
+15 -14
View File
@@ -13,7 +13,7 @@ by gradually shifting traffic to the new version while measuring metrics and run
![flagger-overview](https://raw.githubusercontent.com/fluxcd/flagger/main/docs/diagrams/flagger-overview.png)
Flagger implements several deployment strategies (Canary releases, A/B testing, Blue/Green mirroring)
using a service mesh (App Mesh, Istio, Linkerd)
using a service mesh (App Mesh, Istio, Linkerd, Open Service Mesh)
or an ingress controller (Contour, Gloo, NGINX, Skipper, Traefik) for traffic routing.
For release analysis, Flagger can query Prometheus, Datadog, New Relic or CloudWatch
and for alerting it uses Slack, MS Teams, Discord and Rocket.
@@ -43,6 +43,7 @@ Flagger documentation can be found at [docs.flagger.app](https://docs.flagger.ap
* [NGINX Ingress](https://docs.flagger.app/tutorials/nginx-progressive-delivery)
* [Skipper](https://docs.flagger.app/tutorials/skipper-progressive-delivery)
* [Traefik](https://docs.flagger.app/tutorials/traefik-progressive-delivery)
* [Open Service Mesh (OSM)](https://docs.flagger.app/tutorials/osm-progressive-delivery)
* [Kubernetes Blue/Green](https://docs.flagger.app/tutorials/kubernetes-blue-green)
### Who is using Flagger
@@ -70,7 +71,7 @@ metadata:
namespace: test
spec:
# service mesh provider (optional)
# can be: kubernetes, istio, linkerd, appmesh, nginx, skipper, contour, gloo, supergloo, traefik
# can be: kubernetes, istio, linkerd, appmesh, nginx, skipper, contour, gloo, supergloo, traefik, osm
# for SMI TrafficSplit can be: smi:v1alpha1, smi:v1alpha2, smi:v1alpha3
provider: istio
# deployment reference
@@ -182,19 +183,19 @@ For more details on how the canary analysis and promotion works please [read the
**Service Mesh**
| Feature | App Mesh | Istio | Linkerd | SMI | Kubernetes CNI |
| ------------------------------------------ | ------------------ | ------------------ | ------------------ | ----------------- | ----------------- |
| Canary deployments (weighted traffic) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: |
| A/B testing (headers and cookies routing) | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: | :heavy_minus_sign: |
| Blue/Green deployments (traffic switch) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
| Blue/Green deployments (traffic mirroring) | :heavy_minus_sign: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: | :heavy_minus_sign: |
| Webhooks (acceptance/load testing) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
| Manual gating (approve/pause/resume) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
| Request success rate check (L7 metric) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: |
| Request duration check (L7 metric) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: |
| Custom metric checks | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
| Feature | App Mesh | Istio | Linkerd | Open Service Mesh | SMI | Kubernetes CNI |
| ------------------------------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ |
| Canary deployments (weighted traffic) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: |
| A/B testing (headers and cookies routing) | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: | :heavy_minus_sign: | :heavy_minus_sign: |
| Blue/Green deployments (traffic switch) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
| Blue/Green deployments (traffic mirroring) | :heavy_minus_sign: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: | :heavy_minus_sign: | :heavy_minus_sign: |
| Webhooks (acceptance/load testing) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
| Manual gating (approve/pause/resume) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
| Request success rate check (L7 metric) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: |
| Request duration check (L7 metric) | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: |
| Custom metric checks | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
For SMI compatible service mesh solutions like Open Service Mesh, Consul Connect or Nginx Service Mesh,
For other SMI compatible service mesh solutions like Consul Connect or Nginx Service Mesh,
[Prometheus MetricTemplates](https://docs.flagger.app/usage/metrics#prometheus) can be used to implement
the request success rate and request duration checks.
+10 -1
View File
@@ -7,7 +7,7 @@ Flagger can run automated application analysis, testing, promotion and rollback
* A/B Testing (HTTP headers and cookies traffic routing)
* Blue/Green (traffic switching and mirroring)
Flagger works with service mesh solutions (Istio, Linkerd, AWS App Mesh) and with Kubernetes ingress controllers
Flagger works with service mesh solutions (Istio, Linkerd, AWS App Mesh, Open Service Mesh) and with Kubernetes ingress controllers
(NGINX, Skipper, Gloo, Contour, Traefik).
Flagger can be configured to send alerts to various chat platforms such as Slack, Microsoft Teams, Discord and Rocket.
@@ -96,6 +96,15 @@ $ helm upgrade -i flagger flagger/flagger \
--set meshProvider=traefik
```
To install Flagger for **Open Service Mesh (OSM)** (requires OSM to have been installed with Prometheus):
```console
$ helm upgrade -i flagger flagger/flagger \
--namespace=osm-system \
--set meshProvider=osm \
--set metricsServer=http://osm-prometheus.osm-system.svc:7070
```
The [configuration](#configuration) section lists the parameters that can be configured during installation.
## Uninstalling the Chart
+1 -1
View File
@@ -26,7 +26,7 @@ helm upgrade -i flagger-loadtester flagger/loadtester
The command deploys loadtester on the Kubernetes cluster in the default namespace.
> **Tip**: Note that the namespace where you deploy the load tester should
> have the Istio, App Mesh or Linkerd sidecar injection enabled
> have the Istio, App Mesh, Linkerd or Open Service Mesh sidecar injection enabled
The [configuration](#configuration) section lists the parameters that can be configured during installation.
Binary file not shown.

After

Width:  |  Height:  |  Size: 124 KiB

+2 -1
View File
@@ -10,7 +10,7 @@ version in production by gradually shifting traffic to the new version while mea
and running conformance tests.
Flagger implements several deployment strategies (Canary releases, A/B testing, Blue/Green mirroring)
using a service mesh (App Mesh, Istio, Linkerd)
using a service mesh (App Mesh, Istio, Linkerd, Open Service Mesh)
or an ingress controller (Contour, Gloo, NGINX, Skipper, Traefik) for traffic routing.
For release analysis, Flagger can query Prometheus, Datadog, New Relic, CloudWatch or Graphite
and for alerting it uses Slack, MS Teams, Discord and Rocket.
@@ -36,6 +36,7 @@ After installing Flagger, you can follow one of these tutorials to get started:
* [Istio](tutorials/istio-progressive-delivery.md)
* [Linkerd](tutorials/linkerd-progressive-delivery.md)
* [AWS App Mesh](tutorials/appmesh-progressive-delivery.md)
* [Open Service Mesh](tutorials/osm-progressive-delivery.md)
**Ingress controller tutorials**
+1
View File
@@ -30,6 +30,7 @@
* [NGINX Canary Deployments](tutorials/nginx-progressive-delivery.md)
* [Skipper Canary Deployments](tutorials/skipper-progressive-delivery.md)
* [Traefik Canary Deployments](tutorials/traefik-progressive-delivery.md)
* [Open Service Mesh Deployments](tutorials/osm-progressive-delivery.md)
* [Blue/Green Deployments](tutorials/kubernetes-blue-green.md)
* [Canary analysis with Prometheus Operator](tutorials/prometheus-operator.md)
* [Zero downtime deployments](tutorials/zero-downtime-deployments.md)
@@ -71,6 +71,16 @@ helm upgrade -i flagger flagger/flagger \
--set metricsServer=http://appmesh-prometheus:9090
```
Deploy Flagger for **Open Service Mesh (OSM)** (requires OSM to have been installed with Prometheus):
```console
$ helm upgrade -i flagger flagger/flagger \
--namespace=osm-system \
--set crd.create=false \
--set meshProvider=osm \
--set metricsServer=http://osm-prometheus.osm-system.svc:7070
```
You can install Flagger in any namespace as long as it can talk to the Prometheus service on port 9090.
For ingress controllers, the install instructions are:
@@ -173,6 +183,14 @@ kustomize build https://github.com/fluxcd/flagger/kustomize/linkerd?ref=main | k
This deploys Flagger in the `linkerd` namespace and sets the metrics server URL to Linkerd's Prometheus instance.
Install Flagger for Open Service Mesh:
```bash
kustomize build https://github.com/fluxcd/flagger/kustomize/osm?ref=main | kubectl apply -f -
```
This deploys Flagger in the `osm-system` namespace and sets the metrics server URL to OSM's Prometheus instance.
If you want to install a specific Flagger release, add the version number to the URL:
```bash
@@ -202,7 +220,7 @@ metadata:
name: app
namespace: test
spec:
# can be: kubernetes, istio, linkerd, appmesh, nginx, skipper, gloo, traefik
# can be: kubernetes, istio, linkerd, appmesh, nginx, skipper, gloo, traefik, osm
# use the kubernetes provider for Blue/Green style deployments
provider: nginx
```
@@ -0,0 +1,355 @@
# Open Service Mesh Canary Deployments
This guide shows you how to use Open Service Mesh (OSM) and Flagger to automate canary deployments.
![Flagger OSM Traffic Split](https://raw.githubusercontent.com/fluxcd/flagger/main/docs/diagrams/flagger-osm-traffic-split.png)
## Prerequisites
Flagger requires a Kubernetes cluster **v1.16** or newer and Open Service Mesh **0.9.1** or newer.
Install Open Service Mesh with Prometheus and permissive traffic policy enabled.
```bash
osm install \
--set=OpenServiceMesh.deployPrometheus=true \
--set=OpenServiceMesh.enablePermissiveTrafficPolicy=true
```
Install Flagger in the `osm-system` namespace using `kubectl`.
```bash
kubectl apply -k https://github.com/fluxcd/flagger//kustomize/osm?ref=main
```
Alternatively, Flagger can be installed in the `osm-system` namespace using `helm`.
```bash
helm upgrade -i flagger flagger/flagger \
--namespace=osm-system \
--set meshProvider=osm \
--set metricsServer=http://osm-prometheus.osm-system.svc:7070
```
## Bootstrap
Flagger takes a Kubernetes deployment and optionally a horizontal pod autoscaler (HPA),
then creates a series of objects (Kubernetes deployments, ClusterIP services and SMI traffic split).
These objects expose the application inside the mesh and drive the canary analysis and promotion.
Create a `test` namespace and enable osm namespace monitoring and metrics scraping for the namespace.
```bash
kubectl create namespace test
osm namespace add test
osm metrics enable --namespace test
```
Create a `podinfo` deployment and a horizontal pod autoscaler:
```bash
kubectl apply -k https://github.com/fluxcd/flagger//kustomize/podinfo?ref=main
```
Install the load testing service to generate traffic during the canary analysis:
```bash
kubectl apply -k https://github.com/fluxcd/flagger//kustomize/tester?ref=main
```
Create a canary custom resource for the `podinfo` deployment.
The following `podinfo` canary custom resource instructs Flagger to:
1. monitor any changes to the `podinfo` deployment created earlier,
2. detect `podinfo` deployment revision changes, and
3. start a Flagger canary analysis, rollout, and promotion if there were deployment revision changes.
```yaml
apiVersion: flagger.app/v1beta1
kind: Canary
metadata:
name: podinfo
namespace: test
spec:
provider: osm
# deployment reference
targetRef:
apiVersion: apps/v1
kind: Deployment
name: podinfo
# HPA reference (optional)
autoscalerRef:
apiVersion: autoscaling/v2beta2
kind: HorizontalPodAutoscaler
name: podinfo
# the maximum time in seconds for the canary deployment
# to make progress before it is rolled back (default 600s)
progressDeadlineSeconds: 60
service:
# ClusterIP port number
port: 9898
# container port number or name (optional)
targetPort: 9898
analysis:
# schedule interval (default 60s)
interval: 30s
# max number of failed metric checks before rollback
threshold: 5
# max traffic percentage routed to canary
# percentage (0-100)
maxWeight: 50
# canary increment step
# percentage (0-100)
stepWeight: 5
# OSM Prometheus checks
metrics:
- name: request-success-rate
# minimum req success rate (non 5xx responses)
# percentage (0-100)
thresholdRange:
min: 99
interval: 1m
- name: request-duration
# maximum req duration P99
# milliseconds
thresholdRange:
max: 500
interval: 30s
# testing (optional)
webhooks:
- name: acceptance-test
type: pre-rollout
url: http://flagger-loadtester.test/
timeout: 30s
metadata:
type: bash
cmd: "curl -sd 'test' http://podinfo-canary.test:9898/token | grep token"
- name: load-test
type: rollout
url: http://flagger-loadtester.test/
timeout: 5s
metadata:
cmd: "hey -z 2m -q 10 -c 2 http://podinfo-canary.test:9898/"
```
Save the above resource as podinfo-canary.yaml and then apply it:
```bash
kubectl apply -f ./podinfo-canary.yaml
```
When the canary analysis starts, Flagger will call the pre-rollout webhooks before routing traffic to the canary.
The canary analysis will run for five minutes while validating the HTTP metrics and rollout hooks every half a minute.
After a couple of seconds Flagger will create the canary objects.
```bash
# applied
deployment.apps/podinfo
horizontalpodautoscaler.autoscaling/podinfo
ingresses.extensions/podinfo
canary.flagger.app/podinfo
# generated
deployment.apps/podinfo-primary
horizontalpodautoscaler.autoscaling/podinfo-primary
service/podinfo
service/podinfo-canary
service/podinfo-primary
trafficsplits.split.smi-spec.io/podinfo
```
After the boostrap, the `podinfo` deployment will be scaled to zero and the traffic to `podinfo.test` will be routed to the primary pods.
During the canary analysis, the `podinfo-canary.test` address can be used to target directly the canary pods.
## Automated Canary Promotion
Flagger implements a control loop that gradually shifts traffic to the canary while measuring key performance indicators like HTTP requests success rate, requests average duration and pod health.
Based on analysis of the KPIs a canary is promoted or aborted.
![Flagger Canary Stages](https://raw.githubusercontent.com/fluxcd/flagger/main/docs/diagrams/flagger-canary-steps.png)
Trigger a canary deployment by updating the container image:
```bash
kubectl -n test set image deployment/podinfo \
podinfod=stefanprodan/podinfo:3.1.1
```
Flagger detects that the deployment revision changed and starts a new rollout.
```text
kubectl -n test describe canary/podinfo
Status:
Canary Weight: 0
Failed Checks: 0
Phase: Succeeded
Events:
New revision detected! Scaling up podinfo.test
Waiting for podinfo.test rollout to finish: 0 of 1 updated replicas are available
Pre-rollout check acceptance-test passed
Advance podinfo.test canary weight 5
Advance podinfo.test canary weight 10
Advance podinfo.test canary weight 15
Advance podinfo.test canary weight 20
Advance podinfo.test canary weight 25
Waiting for podinfo.test rollout to finish: 1 of 2 updated replicas are available
Advance podinfo.test canary weight 30
Advance podinfo.test canary weight 35
Advance podinfo.test canary weight 40
Advance podinfo.test canary weight 45
Advance podinfo.test canary weight 50
Copying podinfo.test template spec to podinfo-primary.test
Waiting for podinfo-primary.test rollout to finish: 1 of 2 updated replicas are available
Promotion completed! Scaling down podinfo.test
```
**Note** that if you apply any new changes to the `podinfo` deployment during the canary analysis, Flagger will restart the analysis.
A canary deployment is triggered by changes in any of the following objects:
* Deployment PodSpec \(container image, command, ports, env, resources, etc\)
* ConfigMaps mounted as volumes or mapped to environment variables
* Secrets mounted as volumes or mapped to environment variables
You can monitor all canaries with:
```bash
watch kubectl get canaries --all-namespaces
NAMESPACE NAME STATUS WEIGHT LASTTRANSITIONTIME
test podinfo Progressing 15 2019-06-30T14:05:07Z
prod frontend Succeeded 0 2019-06-30T16:15:07Z
prod backend Failed 0 2019-06-30T17:05:07Z
```
## Automated Rollback
During the canary analysis you can generate HTTP 500 errors and high latency to test if Flagger pauses and rolls back the faulted version.
Trigger another canary deployment:
```bash
kubectl -n test set image deployment/podinfo \
podinfod=stefanprodan/podinfo:3.1.2
```
Exec into the load tester pod with:
```bash
kubectl -n test exec -it flagger-loadtester-xx-xx sh
```
Repeatedly generate HTTP 500 errors:
```bash
watch -n 1 curl http://podinfo-canary.test:9898/status/500
```
Repeatedly generate latency:
```bash
watch -n 1 curl http://podinfo-canary.test:9898/delay/1
```
When the number of failed checks reaches the canary analysis thresholds defined in the `podinfo` canary custom resource earlier, the traffic is routed back to the primary, the canary is scaled to zero and the rollout is marked as failed.
```text
kubectl -n test describe canary/podinfo
Status:
Canary Weight: 0
Failed Checks: 10
Phase: Failed
Events:
Starting canary analysis for podinfo.test
Pre-rollout check acceptance-test passed
Advance podinfo.test canary weight 5
Advance podinfo.test canary weight 10
Advance podinfo.test canary weight 15
Halt podinfo.test advancement success rate 69.17% < 99%
Halt podinfo.test advancement success rate 61.39% < 99%
Halt podinfo.test advancement success rate 55.06% < 99%
Halt podinfo.test advancement request duration 1.20s > 0.5s
Halt podinfo.test advancement request duration 1.45s > 0.5s
Rolling back podinfo.test failed checks threshold reached 5
Canary failed! Scaling down podinfo.test
```
## Custom Metrics
The canary analysis can be extended with Prometheus queries.
Let's a define a check for 404 not found errors.
Edit the canary analysis (`podinfo-canary.yaml` file) and add the following metric.
For more information on creating additional custom metrics using OSM metrics, please check the [metrics available in OSM](https://docs.openservicemesh.io/docs/guides/observability/metrics/#available-metrics).
```yaml
analysis:
metrics:
- name: "404s percentage"
threshold: 3
query: |
100 - (
sum(
rate(
osm_request_total{
destination_namespace="test",
destination_kind="Deployment",
destination_name="podinfo",
response_code!="404"
}[1m]
)
)
/
sum(
rate(
osm_request_total{
destination_namespace="test",
destination_kind="Deployment",
destination_name="podinfo"
}[1m]
)
) * 100
)
```
The above configuration validates the canary version by checking if the HTTP 404 req/sec percentage is below three percent of the total traffic.
If the 404s rate reaches the 3% threshold, then the analysis is aborted and the canary is marked as failed.
Trigger a canary deployment by updating the container image:
```bash
kubectl -n test set image deployment/podinfo \
podinfod=stefanprodan/podinfo:3.1.3
```
Exec into the load tester pod with:
```bash
kubectl -n test exec -it flagger-loadtester-xx-xx sh
```
Repeatedly generate 404s:
```bash
watch -n 1 curl http://podinfo-canary.test:9898/status/404
```
Watch Flagger logs to confirm successful canary rollback.
```text
kubectl -n osm-system logs deployment/flagger -f | jq .msg
Starting canary deployment for podinfo.test
Pre-rollout check acceptance-test passed
Advance podinfo.test canary weight 5
Halt podinfo.test advancement 404s percentage 6.20 > 3
Halt podinfo.test advancement 404s percentage 6.45 > 3
Halt podinfo.test advancement 404s percentage 7.22 > 3
Halt podinfo.test advancement 404s percentage 6.50 > 3
Halt podinfo.test advancement 404s percentage 6.34 > 3
Rolling back podinfo.test failed checks threshold reached 5
Canary failed! Scaling down podinfo.test
```
+2 -2
View File
@@ -3,11 +3,11 @@
Flagger can run automated application analysis, promotion and rollback for the following deployment strategies:
* **Canary Release** \(progressive traffic shifting\)
* Istio, Linkerd, App Mesh, NGINX, Skipper, Contour, Gloo Edge, Traefik
* Istio, Linkerd, App Mesh, NGINX, Skipper, Contour, Gloo Edge, Traefik, Open Service Mesh
* **A/B Testing** \(HTTP headers and cookies traffic routing\)
* Istio, App Mesh, NGINX, Contour, Gloo Edge
* **Blue/Green** \(traffic switching\)
* Kubernetes CNI, Istio, Linkerd, App Mesh, NGINX, Contour, Gloo Edge
* Kubernetes CNI, Istio, Linkerd, App Mesh, NGINX, Contour, Gloo Edge, Open Service Mesh
* **Blue/Green Mirroring** \(traffic shadowing\)
* Istio
+9 -1
View File
@@ -34,6 +34,14 @@ kustomize build https://github.com/fluxcd/flagger/kustomize/linkerd?ref=main | k
This deploys Flagger in the `linkerd` namespace and sets the metrics server URL to linkerd-viz extension's Prometheus instance
which lives under `linkerd-viz` namespace by default.
Install Flagger for Open Service Mesh:
```bash
kustomize build https://github.com/fluxcd/flagger/kustomize/osm?ref=main | kubectl apply -f -
```
This deploys Flagger in the `osm-system` namespace and sets the metrics server URL to OSM's Prometheus instance.
If you want to install a specific Flagger release, add the version number to the URL:
```bash
@@ -68,7 +76,7 @@ metadata:
name: app
namespace: test
spec:
# can be: kubernetes, istio, linkerd, appmesh, nginx, skipper, gloo
# can be: kubernetes, istio, linkerd, appmesh, nginx, skipper, gloo, osm
# use the kubernetes provider for Blue/Green style deployments
provider: nginx
```