Parlons de la façon de déployer des services de nœuds sur plusieurs environnements via docker-compose

# docker-compose.yml
version: '3.0'
services: # 服务列表
  # 测试数据库
  mysql:
    image: mysql
    container_name: mysql_test
    restart: always
    environment:
      - MYSQL_ROOT_PASSWORD=test_sql
      - NODE_ENV=development
    ports:
      - 13306:3306
    volumes:
      - 服务器上对应目录:/var/lib/mysql
      
  # 测试node服务
  server:  # node服务
    container_name: server-test # 容器名称
    image: node:14.15.0
    ports:  # 暴露的端口
      - "7007:5088"
    environment: 
      - NODE_ENV=development
    volumes:
      - .:/data
    working_dir: /data
    depends_on: # web服务依靠mysql要先等mysql启动
      - mysql
    restart: on-failure:5 # 自动重启，失败的话重启5次后停止
    command: yarn start # 覆盖容器启动后默认执行的命令

# docker-compose.prod.yml
version: '3.0'
services: # 服务列表
  # 线上数据库
  prod-mysql:
    image: mysql
    container_name: mysql_prod
    restart: always
    environment:
      - MYSQL_ROOT_PASSWORD=prod_sql
      - NODE_ENV=production
    ports:
      - 13307:3306
    volumes:
      - 服务器上对应目录:/var/lib/mysql

  # 线上node服务
  prod-server:
    container_name: server-prod
    image: node:14.15.0
    ports:
      - "7077:5089"
    environment: 
      - NODE_ENV=production
    volumes:
      - .:/data
    working_dir: /data
    depends_on:
      - prod-mysql
    restart: on-failure:5
    command: yarn start:prod

# cross-env指定NODE_ENV为开发或线上环境
...
"scripts": {
    ...
    "build": "nest build",
    "start": "yarn && cross-env  NODE_ENV=development nest start",
    "start:prod": "yarn && yarn build && cross-env  NODE_ENV=production node dist/src/main",
    ...
  },
...

# 测试(dev分支)，git clone node服务地址，切换到dev分支
/opt/xxx/server-test/server

# 线上(master分支)，git clone node服务地址，切换到master分支
/opt/xxx/server-prod/server

# CI变量说明说明
- BRANCH、DEV_BRANCH是CI变量，分别对应master、dev分支
- DOCKER_CONTAINER、DEV_DOCKER_CONTAINER分别对应线上、测试启动的docker容器
- ROOT_PATH、DEV_ROOT_PATH分别对应远程服务器上线上、测试node服务存放路径
- CI_PROJECT_NAME表示gitlab上仓库名称

stages:
  - dev_deploy
  - master_deploy

master_deploy:
  stage: master_deploy
  image: ansible镜像地址
  script:
    - echo \"${HOST}\" ansible_ssh_user=\"${USER}\" ansible_ssh_pass=\"${PASS}\" ansible_ssh_host=\"${HOST}\" > hosts
    - echo ansible-playbook ansible.yaml -e hosts=${HOST} -i ./hosts
    - ansible-playbook ansible.yaml -e "HOST=${HOST}  DEST_PATH=${ROOT_PATH}/${CI_PROJECT_NAME} DOCKER_CONTAINER_NAME=${DOCKER_CONTAINER} CUR_BRANCH=${BRANCH}" -i ./hosts
    - rm -f hosts
  only:
    - master
  tags:
    - k8s

dev_deploy:
  stage: dev_deploy
  image: ansible镜像地址
  script:
    - echo \"${HOST}\" ansible_ssh_user=\"${USER}\" ansible_ssh_pass=\"${PASS}\" ansible_ssh_host=\"${HOST}\" > hosts
    - echo ansible-playbook ansible.yaml -e hosts=${HOST} -i ./hosts
    - ansible-playbook ansible.yaml -e "HOST=${HOST}  DEST_PATH=${DEV_ROOT_PATH}/${CI_PROJECT_NAME} DOCKER_CONTAINER_NAME=${DEV_DOCKER_CONTAINER} CUR_BRANCH=${DEV_BRANCH}" -i ./hosts
    - rm -f hosts
  only:
    - dev
  tags:
    - k8s

# cd到node服务server目录，切换分支，拉取最新代码，docker容器重启
- name: deploy
  hosts: "{{ HOST }}"
  become_user: root
  become: yes
  tasks: # 任务
    - name: git checkout branch
      command: git checkout "{{CUR_BRANCH}}"
      args:
        chdir: "{{ DEST_PATH }}"
    - name: git pull
      command: git pull
      args:
        chdir: "{{ DEST_PATH }}"
    - name: docker restart container
      command: docker restart "{{ DOCKER_CONTAINER_NAME }}"
      args:
        chdir: "{{ DEST_PATH }}"

# 测试目录 /opt/xxx/server-test/server
docker-compose up -d

# 线上目录 /opt/xxx/server-prod/server
docker-compose -f docker-compose.prod.yml up -d

# 修改前
# docker-compose.yml
version: '3.0'
services:
  ...
  server:
    ...
    command: yarn && yarn start
    
# package.json
"scripts": {
    ...
    "build": "nest build",
    "start": "cross-env  NODE_ENV=development nest start",
    "start:prod": "cross-env  NODE_ENV=production yarn build && node dist/src/main",
    ...
  },
    
# 修改后
# docker-compose.yml
version: '3.0'
services:
  ...
  server:
    ...
    command: yarn start
    
# package.json
方案一：
"scripts": {
    ...
    "build": "nest build",
    "start": "yarn && cross-env  NODE_ENV=development nest start",
    "start:prod": "yarn && yarn build && cross-env  NODE_ENV=production node dist/src/main",
    ...
  },
  
方案二：
"scripts": {
    ...
    "build": "nest build",
    "start": "cross-env NODE_ENV=development nest start",
    "prestart": "yarn",
    "start:prod": "yarn build && cross-env  NODE_ENV=production node dist/src/main",
    "prestart:prod": "yarn",
    ...
},