docker-compose 项目迁移到 k8s

背景

生产环境有个Confluence，因为是用的公有云，最近想迁移到自己的自建k8s集群上。

 

由于项目是用的 docker-compose 启动运行的，首先是要备份数据。

 

1、备份PGSQL数据

docker exec 容器NAMES pg_dump  -U  User  DB > /data/backup/db.sql

 

 

2、打包项目镜像

docker save confluence:latest | gzip > confluence.tar.gz
docker save postgresql:latest | gzip > postgresql.tar.gz

 

3、docker-compose 文件格式转换成 deployment

 

参考链接 https://kompose.io/setup/

参考链接 https://kubernetes.io/zh/docs/tasks/configure-pod-container/translate-compose-kubernetes/

 

 

 

 转换完成，根据自己的需求在改改。

 

deployment

apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: ns-wiki
  name: postgresql
  labels:
    app: postgresql
spec:
  replicas: 1
  selector:
    matchLabels:
      app: postgresql
  template:
    metadata:
      name: postgresql
      labels:
        app: postgresql
    spec:
      restartPolicy: Always
      containers:
      - name: postgresql
        image: blacklabelops/postgres:9.5.4
        imagePullPolicy: IfNotPresent
        env:
          - name: POSTGRES_COLLATE
            value: C
          - name: POSTGRES_COLLATE_TYPE
            value: C
          - name: POSTGRES_DB
            value: xxxxdb
          - name: POSTGRES_ENCODING
            value: UNICODE
          - name: POSTGRES_PASSWORD
            value: xxxx
          - name: POSTGRES_USER
            value: cxxxxdb
        resources:
          requests:
            cpu: 100m
            memory: 256Mi
          limits:
            cpu: 300m
            memory: 2Gi
        volumeMounts:
          - name: postgresql-data
            mountPath: /var/lib/postgresql/data
          - name: date-conf
            mountPath: /etc/localtime
      volumes:
      - name: postgresql-data
        persistentVolumeClaim:
          claimName: postgresql-data
      - name: date-conf
        hostPath:
          path: /etc/localtime 

 

pvc

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: postgresql-data
  namespace: ns-wiki
spec:
  storageClassName: resize-gfs-class
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 50Gi

 

confluence 项目的大概也是这样

 

部署好了deployment 之后，导入数据到deployment的 pgsql 

 

kubectl exec -i -n ns-wiki  postgresql-5b9c8778ff-c98t6 -- psql -U xxxdb -d db < xxxxncedb.sql