Kubernetes [Jakub Kulhan] (6. sraz, Praha, 31.3.2016)
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Kubernetes [Jakub Kulhan] (6. sraz, Praha, 31.3.2016)
- 1. commit => #GitHub => #CircleCI => #Docker => #Kubernetes #AWS cluster 6. sraz přátel Symfony v Praze 31.3.2016
- 2. continuous integration … deployment … delivery
- 3. Kouzelná Almara 1 Java aplikace v Tomcatu (RESTful API + Wicket UI)
- 5. fuck it! 🐙 #BitBucket => #Bamboo => SSH upload WARka => jetty-runner.jar + automatický reload po uploadu nového WARu (Node.JS skript)
- 6. Skrz 3 frontend PHP(-FPM) aplikace, 2 3 ReactPHP aplikace, ~30 RabbitMQ consumers, 1 Go aplikace
- 7. SVN 👹
- 8. fuck it! 🐙 #BitBucket => BB hook => checkout git do ~/commits/<commit> => hook.sh => (na stagingu automaticky) swap.sh
- 9. hitserver, adserver, ranking, RabbitMQ consumers supervisord 🤘 porty 💩
- 10. hitserver, adserver, ranking, RabbitMQ consumers supervisord 💩 porty 💩
- 11. Liftago 7 Java aplikací, 2 Node.JS aplikace, Python skripty v crontabu
- 12. 💩 Jelastic 💩 💩 Dogado 💩
- 14. ❓ Java/PHP/Go/Node/… ❓ Java 7 vs. 8, PHP 5.3 vs. 7.0, … ❓ supervisor/autorestart ❓ rolling deployment ❓ porty ❓ nezávislé na hostingu
- 15. ❓ Java/PHP/Go/Node/… ✅ Docker ❓ Java 7 vs. 8, PHP 5.3 vs. 7.0, … ✅ Docker ❓ supervisor/autorestart ✅ Kubernetes ❓ rolling deployment ✅ Kubernetes ❓ porty ✅ Kubernetes ❓ nezávislé na providerovi ✅ Kubernetes
- 16. Kubernetes
- 21. Reconciliation loop Observed state Desired state
- 22. Reconciliation loop Observed state Desired statecreate
- 23. Reconciliation loop Observed state Desired statescale
- 24. Reconciliation loop Observed state Desired statehealth check
- 25. Replication controller Pod billing 10.0.0.34 Replication controller billing-prod app=billing env=prod replicas=3 app=billing env=prod Pod billing 10.0.0.35 app=billing env=prod Pod billing 10.0.0.36 app=billing env=prod
- 27. Service Pod billing 10.0.0.34 Replication controller billing-prod app=billing env=prod Pod billing 10.0.0.35 app=billing env=prod Pod api 10.0.0.14 app=api env=prod ??? ???
- 29. Service Pod billing 10.0.0.34 Replication controller billing-prod app=billing env=prod Pod billing 10.0.0.35 app=billing env=prod Pod api 10.0.0.14 app=api env=prod Service billing-prod 10.1.0.1
- 32. …a více • Job (cron scheduler plánovaný na 1.3) • DaemonSet • Horizontal Pod Autoscaler • Secret • Ingress
- 34. $ kubectl create -f - <<EOF > apiVersion: v1 > kind: ReplicationController > metadata: > name: billing-prod > spec: > replicas: 3 > template: > metadata: > labels: > app: billing > env: prod > spec: > containers: > - name: billing > image: docker-registry.liftago.com/billing:latest > imagePullPolicy: Always …
- 35. … > env: > - name: SPRING_PROFILES_ACTIVE > value: prod > ports: > - containerPort: 8080 > livenessProbe: > httpGet: > path: /health > port: 8080 > initialDelaySeconds: 60 > timeoutSeconds: 5 > readinessProbe: > httpGet: > path: /health > port: 8080 > initialDelaySeconds: 1 > timeoutSeconds: 1 > imagePullSecrets: > - name: docker-repository.liftago.com > EOF
- 36. $ kubectl create -f <<EOF > apiVersion: v1 > kind: Service > metadata: > name: billing-prod > labels: > app: billing > env: prod > spec: > clusterIP: 10.1.0.1 > ports: > - port: 80 > targetPort: 8080 > protocol: TCP > selector: > app: billing > env: prod > EOF
- 37. $ kubectl get po -l app=billing,env=prod NAME READY STATUS RESTARTS AGE billing-prod-e3jcm 1/1 Running 0 1m billing-prod-4sdfb 1/1 Running 0 1m billing-prod-sd134 1/1 Running 0 1m $ kubectl get rc -l app=billing,env=prod NAME DESIRED CURRENT AGE billing-prod 3 3 1m $ kubectl get svc -l app=billing,env=prod NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE billing-prod 10.1.0.1 <none> 80/TCP 1m
- 38. $ kubectl exec -it billing-prod-e3jcm bash $ cat /etc/hosts 127.0.0.1 billing-prod-e3jcm …
- 41. machine: java: version: oraclejdk8 environment: DOCKER_TAG: $(date +%Y-%m-%d).$CIRCLE_BUILD_NUM services: - docker post: - docker login -e $DOCKER_EMAIL -u $DOCKER_USER -p $DOCKER_PASS $DOCKER_REGISTRY dependencies: post: - sudo wget 'http://storage.googleapis.com/kubernetes-release/release/v1.2.0/bin/linux/amd64/kubectl' -O /usr/local/bin/kubectl - sudo chmod 755 /usr/local/bin/kubectl # docker pull suggested by https://discuss.circleci.com/t/caching-docker-image-with-docker-hub/1784 - docker pull $DOCKER_REGISTRY/$CIRCLE_PROJECT_REPONAME:latest || true test: … deployment: kubernetes: branch: master commands: - docker build -t $DOCKER_REGISTRY/$CIRCLE_PROJECT_REPONAME:$DOCKER_TAG . - docker push $DOCKER_REGISTRY/$CIRCLE_PROJECT_REPONAME:$DOCKER_TAG - docker tag -f $DOCKER_REGISTRY/$CIRCLE_PROJECT_REPONAME:$DOCKER_TAG $DOCKER_REGISTRY/$CIRCLE_PROJECT_REPONAME:latest - docker push $DOCKER_REGISTRY/$CIRCLE_PROJECT_REPONAME:latest - > kubectl config set-cluster kubernetes --server=$KUBERNETES_MASTER && kubectl config set-credentials circleci --token=$KUBERNETES_TOKEN && kubectl config set-context kubernetes --cluster=kubernetes --user=circleci && kubectl config use-context kubernetes - kubectl rolling-update billing-prod --image=$DOCKER_REGISTRY/$CIRCLE_PROJECT_REPONAME:$DOCKER_TAG --update-period=10s