Kubernetes + Compose = Kompose

docker composeで使ってたymlをkubernetes向けにコンバートしてくれるツールを使ってみたのでメモ

インストール

落として権限つけるだけで使えます

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// ダウンロード
$ sudo curl -L https://github.com/kubernetes/kompose/releases/download/v1.9.0/kompose-linux-amd64 -o /usr/local/bin/kompose
$ sudo chmod +x /usr/local/bin/kompose
$ kompose
Kompose is a tool to help users who are familiar with docker-compose move to Kubernetes.

Usage:
  kompose [command]

Available Commands:
  completion  Output shell completion code
  convert     Convert a Docker Compose file
  down        Delete instantiated services/deployments from kubernetes
  help        Help about any command
  up          Deploy your Dockerized application to a container orchestrator.
  version     Print the version of Kompose

Flags:
      --error-on-warning    Treat any warning as an error
  -f, --file stringArray    Specify an alternative compose file
  -h, --help                help for kompose
      --provider string     Specify a provider. Kubernetes or OpenShift. (default "kubernetes")
      --suppress-warnings   Suppress all warnings
  -v, --verbose             verbose output

Use "kompose [command] --help" for more information about a command.

使ってみる

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// サンプルダウンロード
$ wget https://raw.githubusercontent.com/kubernetes/kompose/master/examples/docker-compose-v3.yaml

// コンバート
$ kompose -f ./docker-compose-v3.yaml convert
INFO Kubernetes file "frontend-service.yaml" created
INFO Kubernetes file "redis-master-service.yaml" created
INFO Kubernetes file "redis-slave-service.yaml" created
INFO Kubernetes file "frontend-deployment.yaml" created
INFO Kubernetes file "redis-master-deployment.yaml" created
INFO Kubernetes file "redis-slave-deployment.yaml" created

$ ll
合計 28
-rw-r--r-- 1 9zilla 9zilla 421  3月  1 21:48 docker-compose-v3.yaml
-rw-r--r-- 1 9zilla 9zilla 710  3月  1 21:49 frontend-deployment.yaml
-rw-r--r-- 1 9zilla 9zilla 432  3月  1 21:49 frontend-service.yaml
-rw-r--r-- 1 9zilla 9zilla 608  3月  1 21:49 redis-master-deployment.yaml
-rw-r--r-- 1 9zilla 9zilla 390  3月  1 21:49 redis-master-service.yaml
-rw-r--r-- 1 9zilla 9zilla 687  3月  1 21:49 redis-slave-deployment.yaml
-rw-r--r-- 1 9zilla 9zilla 387  3月  1 21:49 redis-slave-service.yaml

// 中身はこんな感じ
$ head frontend-service.yaml
apiVersion: v1
kind: Service
metadata:
  annotations:
    kompose.cmd: kompose -f ./docker-compose-v3.yaml convert
    kompose.service.type: LoadBalancer
    kompose.version: 1.9.0 (093c756)
  creationTimestamp: null
  labels:
    io.kompose.service: frontend