Continous Delivery to Kubernetes using Helm

Continous Delivery to Kubernetes using Helm

• 2.
  Continuous Delivery to Kubernetesusing Helm Adnan Abdulhussein - @prydonius
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  CI/CD •Run Unit/Functional Tests …also for PRs •Automatically Build and Push Images •Rollout New Version
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  Code/config change Build Test Push Dockerimage Staging/QA deployment Production deployment Manual verification
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  Code/config change Build Test Push Dockerimage Staging/QA deployment Production deployment Manual verification
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  Example: Kubernetes resource apiVersion:v1 kind: Deployment metadata: name: my-app spec: replicas: 1 template: metadata: labels: app: my-app spec: containers: - name: my-app image: prydonius/seanmeme:v1.0.0 ports: - containerPort: 80 livenessProbe: httpGet: path: / port: http initialDelaySeconds: 120 timeoutSeconds: 5
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  kubectl apply -fmanifests/
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  Rolling Upgrade
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  sed -i.bak 's#prydonius/seanmeme:v1.0.0#${imageTag}#' deployment.yaml
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  Package Manager for Kubernetes
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  a little bitabout Helm... • an easier way to manage and share manifests • tweak definitions for different environments • manage the lifecycle of our application
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  Charts(packages) ● Are applicationdefinitions ● Consist of metadata, definitions, config and documentation ● Live in chart repositories todo ├── Chart.yaml ├── README.md ├── templates │ ├── NOTES.txt │ ├── _helpers.tpl │ ├── deployment.yaml │ └── service.yaml └── values.yaml
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  Tiller • In-cluster component •Renders Chart templates • Creates/updates resources • Tracks state of applications Kubernetes Helm Client gRPC Kube API Tiller
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  helm install my-app--set image.tag=${imageTag}
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  Seek. Locate. Deploy.
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  Demo!
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  Pipeline Stages: Build environment{ IMAGE_NAME = 'prydonius/seanmeme' } stage('Build') { agent any steps { checkout scm sh 'docker build -t $IMAGE_NAME:$BUILD_ID .' } }
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  Pipeline Stages: Push stage('ImageRelease') { agent any when { expression { env.BRANCH_NAME == 'master' } } steps { withCredentials([[$class: 'UsernamePasswordMultiBinding', credentialsId: 'dockerhub', usernameVariable: 'DOCKER_USERNAME', passwordVariable: 'DOCKER_PASSWORD']]) { sh ''' docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD docker push $IMAGE_NAME:$BUILD_ID ''' } } } Only release master builds
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  Pipeline Stages: StagingDeployment stage('Staging Deployment') { ... environment { RELEASE_NAME = 'seanmeme-staging' SERVER_HOST = 'staging.seanmeme.k8s.prydoni.us' } steps { sh ''' . ./helm/helm-init.sh helm upgrade --install --namespace staging $RELEASE_NAME ./helm/seanmeme --set image.tag=$BUILD_ID,ingress.host=$SERVER_HOST ''' } }
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  Pipeline Stages: ManualVerification stage('Deploy to Production?') { when { expression { env.BRANCH_NAME == 'master' } } steps { // Prevent any older builds from deploying to production milestone(1) input 'Deploy to Production?' milestone(2) } }
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  Pipeline Stages: ProductionDeployment stage('Production Deployment') { ... environment { RELEASE_NAME = 'seanmeme-production' SERVER_HOST = 'seanmeme.k8s.prydoni.us' } steps { sh ''' . ./helm/helm-init.sh helm upgrade --install --namespace production $RELEASE_NAME ./helm/seanmeme --set image.tag=$BUILD_ID,ingress.host=$SERVER_HOST ''' } }
• 26.
  Helm Community • Over187 contributors • Helm 2.6.1 released last week! • Slack channel: Kubernetes #helm-users • Public dev meetings: Thursdays @ 5:30pm BST (Helm), @ 7pm BST (Charts) • Weekly updates & demos at SIG-Apps meetings: Mondays @ 9am pacific (5pm BST) Join us!
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  Thank You