Question

我有一个使用docker-compose的docker应用程序，我想在openshift-3中部署该项目，所以我正在使用kompose。这是我的docker-compose文件：-

version: '3'

services:
  katana-db:
    image: postgres
    restart: always
    environment:
      POSTGRES_PASSWORD: *****
      POSTGRES_USER: *****
  backend:
    depends_on:
      - katana-db
    build:
      context: .
      dockerfile: dockerfile_uwsgi
    image: warrior_deployment_backend
    extra_hosts:
      - "example.com:100.0.0.201"
    volumes:
      - katana-secrets:/secrets
      - katana-static:/warriorframework_py3/static
      - katana-wapps:/warriorframework_py3/katana/wapps
      - katana-wui:/warriorframework_py3/katana/wui
    ports:
      - "4000:4000"
    environment:
      DB_HOST: katana-db
      DB_NAME: warrior
      DB_USER: *****
      DB_PASSWORD: *****
  migration:
    depends_on:
      - backend
    image: warrior_deployment_backend
    entrypoint: ["sh", "-c"]
    command: ["
      python /warriorframework_py3/katana/manage.py collectstatic --noinput;
      python /warriorframework_py3/katana/manage.py makemigrations;
      python /warriorframework_py3/katana/manage.py migrate;
      echo \"from django.contrib.auth import get_user_model; User = get_user_model(); x = User.objects.create_superuser('admin', '', 'warriorframework') if not User.objects.filter(username='admin').exists() else User.objects.get(username='admin'); x.set_password('warriorframework'); x.save()\" | python /warriorframework_py3/katana/manage.py shell;
      "]
    volumes:
      - katana-static:/warriorframework_py3/static
      - katana-wapps:/warriorframework_py3/katana/wapps
      - katana-wui:/warriorframework_py3/katana/wui
    environment:
      DB_HOST: katana-db
      DB_NAME: warrior
      DB_USER: warrior
      DB_PASSWORD: qwerty
  frontend:
    depends_on:
      - backend
    build:
      context: .
      dockerfile: dockerfile_nginx
    image: warrior_deployment_frontend
    volumes:
      - katana-static:/warriorframework_py3/static
      - nginx-secrets:/secrets
    ports:
      - "9443:8443"
    labels:
      kompose.service.expose: "true"

volumes:
  katana-static:
    driver: local-persist
    driver_opts:
      mountpoint: /data/local-persist/data/warrior/katana-static
  katana-wapps:
    driver: local-persist
    driver_opts:
      mountpoint: /data/local-persist/data/warrior/wapps
  katana-wui:
    driver: local-persist
    driver_opts:
      mountpoint: /data/local-persist/data/warrior/wui
  nginx-secrets:
    driver: local-persist
    driver_opts:
      mountpoint: /data/local-persist/data/warrior/nginx-secrets
  katana-secrets:
    driver: local-persist
    driver_opts:
      mountpoint: /data/local-persist/data/warrior/katana-secrets

当我跑步时：

sudo kompose up --provider openshift

错误如下：

FATA Error while deploying application: persistentvolumeclaims "katana-static" already exists

完整的控制台日志如下：

INFO Building image 'warrior_deployment_backend' from directory 'warrior_docker_deployment'
INFO Image 'warrior_deployment_backend' from directory 'warrior_docker_deployment' built successfully
INFO Pushing image 'warrior_deployment_backend:latest'
INFO Multiple authentication credentials detected. Will try each configuration.
INFO Attempting authentication credentials 'docker-registry-default.router.default.svc.cluster.local
INFO Successfully pushed image 'warrior_deployment_backend:latest'
INFO Building image 'warrior_deployment_frontend' from directory 'warrior_docker_deployment'
INFO Image 'warrior_deployment_frontend' from directory 'warrior_docker_deployment' built successfully
INFO Pushing image 'warrior_deployment_frontend:latest' to registry 
INFO Multiple authentication credentials detected. Will try each configuration.
INFO Attempting authentication credentials 'docker-registry-default.router.default.svc.cluster.local
INFO Successfully pushed image 'warrior_deployment_frontend:latest' 
INFO We are going to create OpenShift DeploymentConfigs, Services and PersistentVolumeClaims for your Dockerized application.
If you need different kind of resources, use the 'kompose convert' and 'oc create -f' commands instead.

INFO Deploying application in "rak-warrior-ui" namespace
INFO Successfully created Service: backend
INFO Successfully created Service: frontend
INFO Successfully created DeploymentConfig: backend
INFO Successfully created ImageStream: backend
INFO Successfully created PersistentVolumeClaim: katana-secrets of size 100Mi. If your cluster has dynamic storage provisioning, you don't have to do anything. Otherwise you have to create PersistentVolume to make PVC work
INFO Successfully created PersistentVolumeClaim: katana-static of size 100Mi. If your cluster has dynamic storage provisioning, you don't have to do anything. Otherwise you have to create PersistentVolume to make PVC work
INFO Successfully created PersistentVolumeClaim: katana-wapps of size 100Mi. If your cluster has dynamic storage provisioning, you don't have to do anything. Otherwise you have to create PersistentVolume to make PVC work
INFO Successfully created PersistentVolumeClaim: katana-wui of size 100Mi. If your cluster has dynamic storage provisioning, you don't have to do anything. Otherwise you have to create PersistentVolume to make PVC work
INFO Successfully created DeploymentConfig: frontend
INFO Successfully created ImageStream: frontend
INFO Successfully created Route: frontend
FATA Error while deploying application: persistentvolumeclaims "katana-static" already exists

根据我的观察/分析，该错误可能是由于以下原因造成的：-

kompose可能错误地解释了共享卷。如果我更清楚地解释这一点，就好像“ katana-static”是由前端，后端和迁移容器使用的共享卷。 kompose执行以下步骤（这里我仅关注共享卷：katana-static）

kompose将会读取docker-compose.yml
现在第一个容器是后端，因此可以在卷下找到katana-static，因此可以创建卷。
接下来，它会转到下一个容器并再次找到katana-static，因此它会尝试再次创建
由于它再次尝试创建共享的持久性卷katana-static（已经存在），因此会引发我们面临的错误。

如果这实际上是正在发生的事情，那么该如何解决？否则是什么导致此错误？

如果还有其他论坛可以问这个问题，请分享评论部分中的链接。谢谢。

Answer 1

问题可能出在本地卷上

volumes:
  katana-static:
    driver: local-persist
    driver_opts:
      mountpoint: /data/local-persist/data/warrior/katana-static
  katana-wapps:
    driver: local-persist
    driver_opts:
      mountpoint: /data/local-persist/data/warrior/wapps
  katana-wui:
    driver: local-persist
    driver_opts:
      mountpoint: /data/local-persist/data/warrior/wui
  nginx-secrets:
    driver: local-persist
    driver_opts:
      mountpoint: /data/local-persist/data/warrior/nginx-secrets
  katana-secrets:
    driver: local-persist
    driver_opts:
      mountpoint: /data/local-persist/data/warrior/katana-secrets

本地卷在openshift中不起作用。我建议您使用“ kompose convert”命令将docker-compose转换为kubernetes YAML。

然后查看并更新pvc和pv。然后最终一个一个地部署资源

部署应用程序时出错：persistentvolumeclaims已经存在

1 个答案: