Differences between revisions 7 and 26 (spanning 19 versions)

Kubernetes helm chart notes

Links: k8s/Azure , k8s/Monitoring , k8s/helm/HelmV2ToV3 , https://lzone.de/blog/Helm-Best-Practices

Helm setup 2020-01

Create a dir and add Chart.yaml with version and maintainer.
Create requirements.yaml file with external charts needed
- search for versions with $ helm search -l stable/rabbitmq-ha
Install local charts from google with $ helm dependency update
Verify with $ helm dependency list

Install 2019-03

Ran official curl, and get_helm, all fine
When deploying chart got an error, tiller not allowed to create namespaces.

Fixed with command belown and helm init --upgrade

kubectl create serviceaccount --namespace kube-system tiller
 # serviceaccount "tiller" created

kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
 # clusterrolebinding "tiller-cluster-rule" created

kubectl patch deploy --namespace kube-system tiller-deploy -p '{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}' 
 # deployment "tiller-deploy" patched

201903 add ingress and static ip

Get k8s nodeResourceGroup grom gui or with

az aks show --resource-group <rgK8S> --name <clusterName> --query nodeResourceGroup -o tsv

provision static ip with

az network public-ip create --resource-group <MC_K8S_from_above> --name <cluster-PublicIP> --allocation-method static

assign ip to nginx ingress controller

helm install stable/nginx-ingress  -namespace kube-system  --set controller.service.loadBalancerIP="52.23.23.32"  --set controller.replicaCount=2

Run 2019-02

helm install --name p1 git/helmchart/ --namespace piet --set "env=DEV" --timeout 600
Run: helm ls --all p1; to check the status of the release
run: helm del --purge p1; to delete it
helm status p1
helm history p1
helm rollback p1 3; roll back to version 3
helm rollback; to last successfully DEPLOYED revision
helm upgrade --debug --dry-run
helm upgrade --install

Tricks

Use checksum of config map to change app annotation and force a new version to be deployed for apps that do not pick up new configs.
- https://helm.sh/docs/developing_charts/#hooks
- https://youtu.be/WugC_mbbiWU?t=1043
hooks
```
annotation:
  "helm.sh/hook": " "
```

HELM install/uninstall

Please look for official current documentation

helmins() {
 kubectl -n kube-system create serviceaccount tiller
 kubectl create clusterrolebinding tiller --clusterrole cluster-admin --serviceaccount=kube-system:tiller
 helm init --service-account=tiller
}
helmdel() {
 kubectl -n kube-system delete deployment tiller-deploy
 kubectl delete clusterrolebinding tiller
 kubectl -n kube-system delete serviceaccount tiller
 
}

CategoryK8sKubernetes

-  ⇤ ← Revision 7 as of 2019-03-14 09:02:37 → 
  Size: 785
  Editor: PieterSmit
  Comment:
+   ← Revision 26 as of 2020-04-15 21:31:49 → ⇥
  Size: 3045
  Editor: PieterSmit
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
+## page was renamed from Kubernetes/helm
## page was renamed from kubernetes/helm
-Line 2:
+Line 4:
- Links: [[Azure/Kubernetes]]
+ Links: [[k8s/Azure]] , [[k8s/Monitoring]] , [[k8s/helm/HelmV2ToV3]] , https://lzone.de/blog/Helm-Best-Practices
-Line 4:
+Line 6:
+== Helm setup 2020-01 ==
 1. Create a dir and add Chart.yaml with version and maintainer.
 2. Create requirements.yaml file with external charts needed
    * search for versions with {{{$ helm search -l stable/rabbitmq-ha }}}
 3. Install local charts from google with {{{$  helm dependency update }}}
 4. Verify with {{{$  helm dependency list }}}


== Install 2019-03 ==
 * Ran official curl, and get_helm, all fine
 * When deploying chart got an error, tiller not allowed to create namespaces.
 * Fixed with command belown and helm init --upgrade {{{{{
kubectl create serviceaccount --namespace kube-system tiller
 # serviceaccount "tiller" created

kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
 # clusterrolebinding "tiller-cluster-rule" created

kubectl patch deploy --namespace kube-system tiller-deploy -p '{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}' 
 # deployment "tiller-deploy" patched

}}}}}

== 201903 add ingress and static ip ==
 
 1. Get k8s nodeResourceGroup grom gui or with {{{
az aks show --resource-group <rgK8S> --name <clusterName> --query nodeResourceGroup -o tsv
}}}
 1. provision static ip with {{{
az network public-ip create --resource-group <MC_K8S_from_above> --name <cluster-PublicIP> --allocation-method static
}}}
 1. assign ip to nginx ingress controller {{{
helm install stable/nginx-ingress  -namespace kube-system  --set controller.service.loadBalancerIP="52.23.23.32"  --set controller.replicaCount=2
}}}

== Run 2019-02 ==
-Line 27:
+Line 65:
-Line 29:
+Line 66:
+=== HELM install/uninstall ===
 * Please look for official current documentation {{{
helmins() {
 kubectl -n kube-system create serviceaccount tiller
 kubectl create clusterrolebinding tiller --clusterrole cluster-admin --serviceaccount=kube-system:tiller
 helm init --service-account=tiller
}
helmdel() {
 kubectl -n kube-system delete deployment tiller-deploy
 kubectl delete clusterrolebinding tiller
 kubectl -n kube-system delete serviceaccount tiller
 
}
}}}
----
CategoryK8sKubernetes