Enjoying k8s cluster with Minikube and Helm
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The document discusses the author's Kubernetes environment and tools including kubectl, Minikube, and Helm. The author details how they use Minikube to create a single node Kubernetes cluster with kubectl and deploy charts with Helm. They also discuss charts they have already tried like Prometheus and Spinnaker as well as creating their own original chart called abematv-comment-receiver.
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Enjoying k8s cluster with Minikube and Helm
- 1. Enjoying k8s cluster with Minikube and Helm 2019/04/08 # node-1 @loftkun
- 2. @loftkun • • • • ==( 10 )==> WEB SRE • k8s
- 3. • • •
- 4. Check out my Qiita ! minikube, helm [PR]
- 5. Agenda • My k8s environment and tools • kubectl • Minikube • Helm • Already tried Charts • Create Original Chart
- 7. kubectl
- 9. $ kubectl –h Advanced Commands: diff Diff live version against would-be applied version apply Apply a configuration to a resource by filename or stdin patch Update field(s) of a resource using strategic merge patch replace Replace a resource by filename or stdin wait Experimental: Wait for a specific condition on one or many resources. convert Convert config files between different API versions kustomize Build a kustomization target from a directory or a remote url.
- 10. Minikube
- 11. New features • v1.0.0 is released at 3/27 ! • • supports Kubernetes 1.14 by default • https://kubernetes.io/blog/2019/03/28/running-kubernetes-locally-on-linux-with- minikube-now-with-kubernetes-1.14-support/
- 12. single-node ? • Minikube single-node Kubernetes cluster • V1.0.0 README.md • https://github.com/kubernetes/minikube/commit/ec5ac30
- 13. Become multi-node support !? • Roadmap (2019) • https://github.com/kubernetes/minikube/blob/master/docs/contributors/roadmap.md • #4 Support all Kubernetes features • Add multi-node support • minikube multi-node cluster
- 14. Setup is Simple ! (on ubuntu 17.10) # download curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 && chmod +x minikube sudo cp minikube /usr/local/bin && rm minikube
- 15. Setup is Simple ! (on ubuntu 17.10) # download curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 && chmod +x minikube sudo cp minikube /usr/local/bin && rm minikube # config as you like minikube config set cpus 12 minikube config set memory 40960
- 16. Setup is Simple ! (on ubuntu 17.10) # download curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 && chmod +x minikube sudo cp minikube /usr/local/bin && rm minikube # config as you like minikube config set cpus 12 minikube config set memory 40960 # start cluster minikube start
- 17. $ kubectl get no NAME STATUS ROLES AGE VERSION minikube Ready master 10m v1.14.0
- 18. $ kubectl get no NAME STATUS ROLES AGE VERSION minikube Ready master 10m v1.14.0 $ kubectl get svc -A NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE default kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 10m kube-system kube-dns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP,9153/TCP 10m kube-system monitoring-grafana NodePort 10.107.133.92 <none> 80:30002/TCP 10m kube-system monitoring-influxdb ClusterIP 10.109.201.109 <none> 8083/TCP,8086/TCP 10m
- 19. Be careful ! • Minikube (VM) • Default • CPU2 2GB 20GB • Spinnaker ( 10GB ) • • minikube config set • • minikube delete minikube start
- 20. Tips of Minikube • minikube CPU default 2 • https://qiita.com/loftkun/items/41ecde082778254de79a • minikube default 2GB • https://qiita.com/loftkun/items/7400d5ae0e7b1fb7d26e • Spinnaker + Kayenta • https://qiita.com/loftkun/items/2fd1d598d04084495e2c
- 21. Helm
- 22. Overview • v2.13.0 is released at 2/27 ! • https://github.com/helm/helm/releases • • • •
- 24. Setup is Simple ! (on ubuntu 17.10) # download & install cli $ curl https://raw.githubusercontent.com/helm/helm/master/scripts/get | bash
- 25. Setup is Simple ! (on ubuntu 17.10) # download & install cli $ curl https://raw.githubusercontent.com/helm/helm/master/scripts/get | bash # deploy tiller $ helm init
- 26. Deploy a Chart (e.g. MongoDB) $ helm install stable/mongodb ¥ --name my-mongo ¥ --namespace my-mongo ¥ --set mongodbRootPassword=pass,mongodbUsername=user1,mongodbPassword=pass1,mongodbDatabase=testdb
- 27. Deploy a Chart (e.g. MongoDB) $ helm install stable/mongodb ¥ --name my-mongo ¥ --namespace my-mongo ¥ --set mongodbRootPassword=pass,mongodbUsername=user1,mongodbPassword=pass1,mongodbDatabase=testdb $ kubectl get svc -n my-mongo NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE my-mongo-mongodb ClusterIP 10.97.82.12 <none> 27017/TCP 37s
- 28. Deploy a Chart (e.g. MongoDB) $ helm install stable/mongodb ¥ --name my-mongo ¥ --namespace my-mongo ¥ --set mongodbRootPassword=pass,mongodbUsername=user1,mongodbPassword=pass1,mongodbDatabase=testdb $ kubectl get svc -n my-mongo NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE my-mongo-mongodb ClusterIP 10.97.82.12 <none> 27017/TCP 37s $ kubectl get po -n my-mongo NAME READY STATUS RESTARTS AGE my-mongo-mongodb-5ccffd7cb4-tkrd8 1/1 Running 0 40s $
- 30. • Grafana • Gitlab-ce • Minio • MongoDB • MySQL • Prometheus • includes alertmanager, pushgateway • Spinnaker Already tried Charts • Istio • Kafka • GitLab • Cloud native images • https://docs.gitlab.com/ee/inst all/docker.html#cloud-native- images • loftkun ( ) • abematv-comment-receiver charts/incubator charts/stable 3rd party repo
- 31. • Grafana • Gitlab-ce • Minio • MongoDB • MySQL • Prometheus • includes alertmanager, pushgateway • Spinnaker Already tried Charts • Istio • Kafka • GitLab • Cloud native images • https://docs.gitlab.com/ee/inst all/docker.html#cloud-native- images • loftkun ( my original chart ) • abematv-comment-receiver charts/incubator charts/stable 3rd party repo Today's Pickup
- 32. charts/incubator/istio ( Don't use now )
- 33. Be Careful ! • • Istio.io •
- 34. • • $ helm fetch stable/spinnaker • $ helm template spinnaker-1.1.7.tgz > spinnaker-1.1.7.yaml
- 35. • • $ helm fetch stable/spinnaker • $ helm template spinnaker-1.1.7.tgz > spinnaker-1.1.7.yaml • • $ istioctl kube-inject -f ./spinnaker.yaml > ./spinnaker-injected.yaml
- 36. • • $ helm fetch stable/spinnaker • $ helm template spinnaker-1.1.7.tgz > spinnaker-1.1.7.yaml • • $ istioctl kube-inject -f ./spinnaker.yaml > ./spinnaker-injected.yaml • • $ kubectl apply -f ./spinnaker-injected.yaml
- 37. Consepts
- 38. Consepts • Proxy ( Envoy ) • Pod • Automatic Manual
- 39. Consepts • Pilot • SideCar • yaml • Route • blue/green deploy • canary release • • • • •
- 41. charts/stable/prometheus • 1Chart • Prometheus / Alertmanager / PushGateway • • Prometheus ------> Alertmanager • Prometheus ------> scrape targets • PushGateway • Node, Service, Pod,
- 42. GitLab ( Cloud native images )
- 45. Create New Chart $ helm create abematv-comment-receiver $ tree abematv-comment-receiver/ abematv-comment-receiver/ ├── charts ├── Chart.yaml ├── templates │ ├── deployment.yaml │ ├── _helpers.tpl │ ├── ingress.yaml │ ├── NOTES.txt │ ├── service.yaml │ └── tests │ └── test-connection.yaml └── values.yaml
- 46. Fix Chart Info ( e.g. image repo, tag ) $ vim abematv-comment-receiver/values.yaml $ cat abematv-comment-receiver/values.yaml image: repository: loftkun/abematv-comment-receiver tag: latest $ helm lint abematv-comment-receiver/ ==> Linting abematv-comment-receiver/ 1 chart(s) linted, no failures $
- 47. Deploy ! $ helm install ./abematv-comment-receiver ¥ --name abmtest ¥ --namespace abmtest $ kubectl get po -n abmtest NAME READY STATUS RESTARTS AGE abmtest-abematv-comment-receiver 1/1 Running 0 43s $ kubectl logs –f ${podname} -n abmtest {"id":"wnBd8uUPeey6BwP8PkkWWS","message":"10 ","createdAtMs":1554630315263}
- 48. loftkun/abematv-comment-receiver • • • : ( https://abema.tv/now-on-air/shogi ) $ kubectl logs abmtest-abematv-comment-receiver-7775747d65-h8zs2 -n abmtest {"id":"XEfQoBeq3LU5Tq4kXTJZ5R","message":" ","createdAtMs":1554630249431} {"id":"hn3gbIw0245r908JfrgOcN","message":" ! ","createdAtMs":1554630274691} {"id":"hn3gbIw0245r908JfrgOmx","message":" by ","createdAtMs":1554630307015} {"id":"wnBd8uUPeey6BwP8PkkWWS","message":"10 ","createdAtMs":1554630315263}
- 50. Tips of Helm • Helm • https://qiita.com/loftkun/items/853bbaabd4bf0fa96e9c • Pushgateway->Prometheus->Alertmanager->Webhook • https://qiita.com/loftkun/items/28cdf77ea9269e255a53 • GitLab • https://qiita.com/loftkun/items/c3945a2595e4f9c7ba09
- 51. Appendix : other trying environments
- 52. Appendix : other trying environments • • • • • • • •