转换码头-使用Kompose在GKE上部署工作负载

Question

我有用Django Restframework编写的项目，用于执行长期运行任务的芹菜，作为代理的Redis和用于监视芹菜任务的Flower。我编写了一个Dockerfile & docker-compose.yaml来创建一个网络，并在容器中运行这个服务。

Dockerfile

FROM python:3.7-slim

ENV PYTHONUNBUFFERED 1

RUN apt-get update &&\
    apt-get install python3-dev default-libmysqlclient-dev gcc  -y &&\
    apt-get install -y libssl-dev libffi-dev &&\
    python -m pip install --upgrade pip &&\
    mkdir /ibdax

WORKDIR /ibdax

COPY ./requirements.txt /requirements.txt

COPY . /ibdax

EXPOSE 80

EXPOSE 5555

ENV ENVIRONMENT=LOCAL

#install dependencies
RUN pip install -r /requirements.txt

RUN pip install django-phonenumber-field[phonenumbers]
RUN pip install drf-yasg[validation]

docker-compose.yaml

version: "3"

services:
  redis:
    container_name: redis-service
    image: "redis:latest"
    ports:
      - "6379:6379"
    restart: always
    command: "redis-server"

  ibdax-backend:
    container_name: ibdax
    build:
      context: .
      dockerfile: Dockerfile
    image: "ibdax-django-service"
    volumes:
      - .:/ibdax
    ports:
      - "80:80"
    expose:
      - "80"
    restart: always
    env_file:
      - .env.staging
    command: >
      sh -c "daphne -b 0.0.0.0 -p 80 ibdax.asgi:application"
    links:
      - redis

  celery:
    container_name: celery-container
    image: "ibdax-django-service"
    command: "watchmedo auto-restart -d . -p '*.py' -- celery  -A ibdax worker -l INFO"
    volumes:
      - .:/ibdax
    restart: always
    env_file:
      - .env.staging
    links:
      - redis
    depends_on:
      - ibdax-backend

  flower:
    container_name: flower
    image: "ibdax-django-service"
    command: "flower -A ibdax --port=5555 --basic_auth=${FLOWER_USERNAME}:${FLOWER_PASSWORD}"
    volumes:
      - .:/ibdax
    ports:
      - "5555:5555"
    expose:
      - "5555"
    restart: always
    env_file:
      - .env
      - .env.staging
    links:
      - redis
    depends_on:
      - ibdax-backend

这个Dockerfile & docker-compose运行得很好，现在我想将这个应用程序部署到GKE。我偶然发现了Kompose，它将docker-compose转换为kubernetes资源。我阅读了文档并开始执行这些步骤，第一步是运行kompose convert。这会返回少量警告，并创建几个文件，如下所示-

WARN Service "celery" won't be created because 'ports' is not specified 
WARN Volume mount on the host "/Users/jeetpatel/Desktop/projects/ibdax" isn't supported - ignoring path on the host 
WARN Volume mount on the host "/Users/jeetpatel/Desktop/projects/ibdax" isn't supported - ignoring path on the host 
WARN Volume mount on the host "/Users/jeetpatel/Desktop/projects/ibdax" isn't supported - ignoring path on the host 
INFO Kubernetes file "flower-service.yaml" created 
INFO Kubernetes file "ibdax-backend-service.yaml" created 
INFO Kubernetes file "redis-service.yaml" created 
INFO Kubernetes file "celery-deployment.yaml" created 
INFO Kubernetes file "env-dev-configmap.yaml" created 
INFO Kubernetes file "celery-claim0-persistentvolumeclaim.yaml" created 
INFO Kubernetes file "flower-deployment.yaml" created 
INFO Kubernetes file "flower-claim0-persistentvolumeclaim.yaml" created 
INFO Kubernetes file "ibdax-backend-deployment.yaml" created 
INFO Kubernetes file "ibdax-backend-claim0-persistentvolumeclaim.yaml" created 
INFO Kubernetes file "redis-deployment.yaml" created 

我忽略了警告并移到下一步，即运行命令

kubectl apply -f flower-service.yaml, ibdax-backend-service.yaml, redis-service.yaml, celery-deployment.yaml

但我知道这个错误-

error: Unexpected args: [ibdax-backend-service.yaml, redis-service.yaml, celery-deployment.yaml]

所以我打算一个接一个地申请-

kubectl apply -f flower-service.yaml

但我知道这个错误-

The Service "flower" is invalid: spec.ports[1]: Duplicate value: core.ServicePort{Name:"", Protocol:"TCP", AppProtocol:(*string)(nil), Port:5555, TargetPort:intstr.IntOrString{Type:0, IntVal:0, StrVal:""}, NodePort:0}

不知道我哪里出了问题。

此外，Kompose的先决条件是有一个Kubernetes集群，所以我创建了一个带有公共网络的Autopilot集群。现在，我不确定这个apply命令将如何识别我创建的集群并在其上部署我的应用程序。

Answer 1

在kompose convert之后，花-service.yaml文件有重复的端口--这就是错误的意思。

...
  ports:
    - name: "5555"
      port: 5555
      targetPort: 5555
    - name: 5555-tcp
      port: 5555
      targetPort: 5555
...

您可以删除端口name: "5555"或name: 5555-tcp。

例如，将端口块替换为

  ports:
    - name: 5555-tcp
      port: 5555
      targetPort: 5555

并再次部署服务。

我还建议将端口名更改为更具描述性的名称。

同样的情况发生在ibdax-后端-service.yaml文件中。

...
  ports:
    - name: "80"
      port: 80
      targetPort: 80
    - name: 80-tcp
      port: 80
      targetPort: 80
...

您可以删除其中一个定义，并重新部署服务(还建议将端口名更改为更具描述性的名称)。

kompose不是一个完美的工具，它总是给你一个完美的结果。您应该检查生成的文件中是否有冲突和/或缺少的字段。