背景

现在项目中拥有多种技术栈的服务，如Go，Java，Web服务，以及其他类服务。在做CI/CD时，不得不根据技术栈不同而建立不同的jenkins的job来实现，而每种技术栈里编译打包的动作各不相同，对运维要求很高。自从docker 17.06版开始支持multi-stage build以后，我们可以不分技术栈，所有服务统一使用docker build来实现编译打包。

Dockerfile以及相关配置

1. Go
   • 由于国内无法拉取依赖，这里省略掉了拉取镜像的动作，默认代码库里包含有依赖。
   • Dockerfile

FROM golang:1.10.2-alpine3.7 as BUILD
COPY . /go/src/PACKAGE.COM/SERVICE_NAME
WORKDIR /go/src/PACKAGE.COM/SERVICE_NAME
RUN go build -o app .


FROM alpine:3.7
WORKDIR /app/
COPY --from=BUILD /go/src/PACKAGE.COM/SERVICE_NAME/app .
CMD ["./app"]

1. Web
   • node-base为基于node:10.9.0-alpine做的一个基础镜像，其中配置了内部npm repo，并且内置了启动shell entrypoint.sh。
   • 内部npm配置文件为.npmrc。
   • entrypoint.sh会生成nginx配置并启动，其中root路径配置为/usr/share/nginx/html。
   • Dockerfile

FROM node-base:0.0.10 as BUILD
ADD ./ /app/
WORKDIR /app
RUN yarn && yarn run build

FROM nginx:1.13.1-alpine
WORKDIR /app

COPY --from=BUILD /app/dist/ /usr/share/nginx/html
COPY --from=BUILD /app/entrypoint.sh /app/
RUN chmod +x /app/entrypoint.sh

CMD ["./entrypoint.sh"]

3. Java
   • java-base为基于maven:3.5.4-jdk-8-alpine的基础镜像，配置了maven。
   • 配置了dev模式和release模式，通过build参数控制。
     + maven配置例

<?xml version="1.0" encoding="UTF-8"?>

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
  <localRepository>/usr/share/maven/ref/repository</localRepository>
  <pluginGroups>
  </pluginGroups>
  <proxies>
  </proxies>
  <servers>
    <server>
      <id>repo</id>
      <username>li.bai</username>
      <password>123456</password>
    </server>
  </servers>
  <mirrors>
    <mirror>
      <id>repo</id>
      <name>Maven Repository</name>
      <url>http://MAVEN_HOST</url>
      <mirrorOf>*</mirrorOf>
    </mirror>
  </mirrors>
  <profiles>
    <profile>
      <id>repo</id>
      <activation>
        <activeByDefault>true</activeByDefault>
      </activation>
      <repositories>
        <repository>
          <id>repo</id>
          <name> Maven Repository</name>
          <url>http://MAVEN_HOST/artifactory/repo</url>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </repository>
      </repositories>
      <pluginRepositories>
        <pluginRepository>
          <id>repo</id>
          <name>Maven Repository</name>
          <url>http://MAVEN_HOST/artifactory/repo</url>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </pluginRepository>
      </pluginRepositories>
    </profile>
  </profiles>
</settings>

• Dockerfile

FROM java-base:0.0.1 as BUILD
ARG release_mode
ARG build_version
ADD . /app
WORKDIR /app
RUN if [ "${release_mode}" = "dev" ] ; then \
      echo "Dev Mode" && mvn -B -f /app/pom.xml -s /usr/share/maven/ref/settings.xml clean install -Dmaven.test.skip=true -U ; \
    else \
      echo "Release Mode" && mvn -B -f /app/pom.xml -s /usr/share/maven/ref/settings.xml versions:update-parent && \
      mvn -B -f /app/pom.xml -s /usr/share/maven/ref/settings.xml versions:set -DnewVersion=${build_version} -DgenerateBackupPoms=false && \
      mvn -B -f /app/pom.xml -s /usr/share/maven/ref/settings.xml clean deploy -Dmaven.test.skip=true -Pmy-product -U ; \
    fi


FROM frolvlad/alpine-oraclejdk8:latest
COPY --from=BUILD /app/starter/application/target/*-release.zip /app.zip

WORKDIR /application
RUN unzip /app.zip

CMD ["sh","-c","bin/app console"]

RUN rm -f /app.zip

Jenkins Job配置

1. 拉取git代码。
2. 执行shell。

docker build IMAGE:${VERSION} --build-arg release_mode=release --build-arg build_version=${VERSION} .  

docker push IMAGE:${VERSION}

3. 调用发布镜像到服务器的job。