flagger/charts/podinfo

Podinfo

Podinfo is a tiny web application made with Go that showcases best practices of running canary deployments with Flagger and Istio.

Installing the Chart

Add Flagger Helm repository:

helm repo add flagger https://flagger.app

To install the chart with the release name frontend:

helm upgrade -i frontend flagger/podinfo \
--namespace test \
--set nameOverride=frontend \
--set backend=http://backend.test:9898/echo \
--set canary.enabled=true \
--set canary.istioIngress.enabled=true \
--set canary.istioIngress.gateway=istio-system/public-gateway \
--set canary.istioIngress.host=frontend.istio.example.com

To install the chart as backend:

helm upgrade -i backend flagger/podinfo \
--namespace test \
--set nameOverride=backend \
--set canary.enabled=true 

Uninstalling the Chart

To uninstall/delete the frontend deployment:

$ helm delete --purge frontend

The command removes all the Kubernetes components associated with the chart and deletes the release.

Configuration

The following tables lists the configurable parameters of the podinfo chart and their default values.

Parameter	Description	Default
image.repository	image repository	quay.io/stefanprodan/podinfo
image.tag	image tag	<VERSION>
image.pullPolicy	image pull policy	IfNotPresent
hpa.enabled	enables HPA	true
hpa.cpu	target CPU usage per pod	80
hpa.memory	target memory usage per pod	512Mi
hpa.minReplicas	maximum pod replicas	2
hpa.maxReplicas	maximum pod replicas	4
resources.requests/cpu	pod CPU request	1m
resources.requests/memory	pod memory request	16Mi
backend	backend URL	None
faults.delay	random HTTP response delays between 0 and 5 seconds	false
faults.error	1/3 chances of a random HTTP response error	false

Specify each parameter using the --set key=value[,key=value] argument to helm install. For example,

$ helm install flagger/podinfo --name frontend \
  --set=image.tag=1.4.1,hpa.enabled=false

Alternatively, a YAML file that specifies the values for the above parameters can be provided while installing the chart. For example,

$ helm install flagger/podinfo --name frontend -f values.yaml