Salut!
Aujourd’hui nous allons voir ensemble comment utiliser Helm avec un cluster AKS. Helm est un gestionnaire de package pour Kubernetes permettant de faire de la gestion de release, des rollbacks etc ..
Avec la commande helm init nous allons déployer Tiller: le composant server-side de helm sur notre cluster AKS.
maxime@Azure:~$ helm init Creating /home/maxime/.helm Creating /home/maxime/.helm/repository Creating /home/maxime/.helm/repository/cache Creating /home/maxime/.helm/repository/local Creating /home/maxime/.helm/plugins Creating /home/maxime/.helm/starters Creating /home/maxime/.helm/cache/archive Creating /home/maxime/.helm/repository/repositories.yaml Adding stable repo with URL: https://kubernetes-charts.storage.googleapis.com Adding local repo with URL: http://127.0.0.1:8879/charts $HELM_HOME has been configured at /home/maxime/.helm. Tiller (the Helm server-side component) has been installed into your Kubernetes Cluster. Happy Helming!
Il existe une multitude de packages (Chart) mis à disposition par la communauté. Vous pouvez les retrouver sur le github helm.
maxime@Azure:~$ helm search NAME CHART VERSION APP VERSION DESCRIPTION stable/acs-engine-autoscaler 2.1.2 2.1.1 Scales worker nodes within agent pools stable/aerospike 0.1.6 v3.14.1.2 A Helm chart for Aerospike in Kubernetes stable/anchore-engine 0.1.3 0.1.6 Anchore container analysis and policy evaluatio... stable/artifactory 7.0.2 5.8.4 Universal Repository Manager supporting all maj... stable/aws-cluster-autoscaler 0.3.2 Scales worker nodes within autoscaling groups. stable/buildkite 0.2.1 3 Agent for Buildkite stable/centrifugo 2.0.0 1.7.3 Centrifugo is a real-time messaging server. stable/cert-manager 0.2.2 0.2.3 A Helm chart for cert-manager stable/chaoskube 0.6.2 0.6.1 Chaoskube periodically kills random pods in you... stable/chronograf 0.4.2 Open-source web application written in Go and R... stable/cluster-autoscaler 0.4.2 1.1.0 Scales worker nodes within autoscaling groups. stable/cockroachdb 0.6.2 1.1.4 CockroachDB is a scalable, survivable, strongly... stable/concourse 0.11.5 3.8.0 Concourse is a simple and scalable CI system. stable/consul 1.3.0 1.0.0 Highly available and distributed service discov... stable/coredns 0.8.0 1.0.1 CoreDNS is a DNS server that chains plugins and... stable/coscale 0.2.0 3.9.1 CoScale Agent stable/dask-distributed 2.0.0 Distributed computation in Python stable/datadog 0.10.9 DataDog Agent stable/docker-registry 1.0.2 2.6.2 A Helm chart for Docker Registry stable/dokuwiki 0.2.1 DokuWiki is a standards-compliant, simple to us... stable/drupal 0.11.6 8.4.4 One of the most versatile open source content m...
Dans notre exemple, nous allons déployer un serveur Jenkins
maxime@Azure:~$ helm install stable/jenkins NAME: wondering-turtle LAST DEPLOYED: Thu Feb 22 01:16:24 2018 NAMESPACE: default STATUS: DEPLOYED RESOURCES: ==> v1/Service NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE wondering-turtle-jenkins-agent ClusterIP 10.0.220.87 <none> 50000/TCP 1s wondering-turtle-jenkins LoadBalancer 10.0.23.135 <pending> 8080:32590/TCP 1s ==> v1beta1/Deployment NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE wondering-turtle-jenkins 1 1 1 0 1s ==> v1/Pod(related) NAME READY STATUS RESTARTS AGE wondering-turtle-jenkins-2144157487-815j7 0/1 Pending 0 1s ==> v1/Secret NAME TYPE DATA AGE wondering-turtle-jenkins Opaque 2 1s ==> v1/ConfigMap NAME DATA AGE wondering-turtle-jenkins 3 1s wondering-turtle-jenkins-tests 1 1s ==> v1/PersistentVolumeClaim NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE wondering-turtle-jenkins Pending default 1s
maxime@Azure:~$ printf $(kubectl get secret --namespace default wondering-turtle-jenkins -o jsonpath="{.data.jenkins-admin-password}" | base64 --decode);echo
B5rH2iWqAL
maxime@Azure:~$ kubectl get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.0.0.1 <none> 443/TCP 30m wondering-turtle-jenkins LoadBalancer 10.0.23.135 52.226.17.49 8080:32590/TCP 4m wondering-turtle-jenkins-agent ClusterIP 10.0.220.87 <none> 50000/TCP 4m
Nous listons les déploiements helm de notre cluster AKS
maxime@Azure:~$ helm list NAME REVISION UPDATED STATUS CHART NAMESPACE wondering-turtle 1 Thu Feb 22 01:16:24 2018 DEPLOYED jenkins-0.13.2 default
Nous pouvons désormais supprimer notre déploiement avec la commande helm delete
maxime@Azure:~$ helm delete wondering-turtle release "wondering-turtle" deleted
Dans un prochain article nous verrons ensemble comment déployer OpenFaaS avec Helm.