使用 PM2 启动 herd 实践记录

痛点与目标

痛点

herd 服务无法在 erda 上进行热部署，无法在线上环境进行debug，修改代码验证问题
erda 上的日志无法筛选，且定位困难，有时会因为因为未知原因无法打开，甚至丢失日志

目标

herd 服务实现类似nginx reload的热部署实践
利用 pm2 的日志功能实现 herd 日志过滤实践

实践

实践环境：招商采购商城项目开发环境

流水线修改

#
# 部署流水线配置
# 记得在流水线环境变量里面配置各env默认值
# PROJECT_TYPE           区分打包的应用 (b2c/b2b/sea/point 等)
# PROJECT_SUB_TYPE       区分打包的二级应用 (srm/brd等)
#
version: '1.1'
envs:
  PROJECT_NAME: gaia-mall

# pipeline 的不同阶段声明。
stages:
  - stage:
      - git-checkout:
          params:
            depth: 1

  - stage:
      - js-build:
          alias: pipeline-build
          version: '1.0'
          params:
            build_cmd:
              - npm ci
              # 开发时使用的 build 命令，二开项目需要在 redevelop 配置中替换为 npm run build
              - npm run build
            node_version: '14'
            workdir: ${git-checkout}
          resources:
            cpu: 2
            mem: 4096

  # 构建镜像
  - stage:
      - release:
          alias: release
          version: '1.0'
          params:
            dice_yml: ${pipeline-build}/dice.yml
            services:
              gaia-mall:
                cmd: sed -i "s^server_name .*^^g" /etc/nginx/conf.d/nginx.conf.template && envsubst "`printf '$%s' $(bash -c "compgen -e")`" < /etc/nginx/conf.d/nginx.conf.template > /etc/nginx/conf.d/default.conf && /usr/local/openresty/bin/openresty -g 'daemon off;'
                copys:
                  - ${pipeline-build}/public/:/app/
                  - ${pipeline-build}/nginx.conf.template:/etc/nginx/conf.d/
                image: registry.cn-hangzhou.aliyuncs.com/dice-third-party/terminus-nginx:0.2
              herd:
                cmd: cd /root/pipeline-build && echo 'Start gaia-mall service ...' && npm i pm2 -g && pm2 start npm --name srm-mall -- run 'server' && pm2 logs srm-mall
                copys:
                  - ${pipeline-build}:/root/
                image: registry.erda.cloud/erda-actions/terminus-debian-herd:1.1.11-n14.17
            workdir: ${pipeline-build}
          resources:
            cpu: 2
            mem: 2048

  # 部署
  - stage:
      - dice:
          params:
            time_out: 300
            release_id_path: ${release}