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Dockerfiles: 标准镜像、基础镜像和服务镜像 === 这是一个包含所有公用镜像构建过程的仓库,主要分三部分:Dockerfile、公共资源、构建脚本。 所有维护这个仓库的人员都应该提供并及时更新自己的文档。 ![Docker logo](https://i.imgur.com/AZd6puj.png) ## Dockerfile --- 包含:library、base、service 结构: ```bash . |-- base # 父类 | |-- centos # 子类 | | `-- centos=version-zh.df # 模糊版本 | |-- gradle | | `-- gradle=2.14.1.df # 明确版本 | |-- jdk | | `-- jdk=8u101.df | `-- tomcat | |-- src # 私有资源(可选) | | |-- docker-entrypoint-kazoo.sh | | `-- docker-entrypoint.sh | |-- tomcat=8.0.36.df |-- library | |-- centos | |-- centos=7.2.1511.df | |-- centos=latest.df # 最后版本 | `-- src | `-- centos-7.2.1511-docker.tar.xz |-- service |-- elasticsearch |-- elasticsearch=2.3.5.df `-- src `-- docker-entrypoint.sh - library:包含各类标准镜像,基本上属于官方的标准流程,该动极少且不做定制。 - base:包含各类基础镜像,根据需求做定制,不修改原有结构。 - service:包含各类服务镜像,根据需求做定制,尽量不修改原有结构。 ``` 用途:规整镜像Dockerfile的存放结构 ## 公共资源 --- 包含:resources 结构: ```bash . `-- sources |-- apache-tomcat-8.0.36.tar.gz |-- elasticsearch-2.3.5.tar.gz |-- gradle-2.14.1-bin.zip `-- jdk-8u101-linux-x64.tar.gz ``` 用途:存放镜像构建过程中的依赖文件 ## 构建脚本 --- 包含:build.sh、build.list 结构: - build.sh: ```bash #!/bin/bash cd `dirname ${BASH_SOURCE}` # 切换到工作目录 suffix="2257b4561a43e400e437b662529255e3" # 标签 [ -n "${1}" ] && DOCKER_REGISTRY="${1%%/*}/" # docker仓库 os="centos" fs="simplehttpserver" dns="bind" mnt=`pwd`/resources DOCKER_BUILD_LIST=`grep -v '^ *#' build.list` # 取得任务 # 构建最简单的系统镜像 sed -i '/^FROM/d' library/${os}/${os}=latest.df sed -i "1iFROM scratch" library/${os}/${os}=latest.df docker build -t ${os}:latest -f library/${os}/${os}=latest.df library/${os} # 构建最简单的文件服务镜像 sed -i '/^FROM/d' library/${fs}/${fs}=latest.df sed -i "1iFROM ${os}" library/${fs}/${fs}=latest.df docker build -t ${fs}:latest -f library/${fs}/${fs}=latest.df library/${fs} # 构建最简单的解析服务镜像 sed -i '/^FROM/d' library/${dns}/${dns}=latest.df sed -i "1iFROM ${os}" library/${dns}/${dns}=latest.df docker build -t ${dns}:latest -f library/${dns}/${dns}=latest.df library/${dns} # 运行文件服务并挂载资源 docker stop ${fs}-${suffix} && docker rm ${fs}-${suffix} || echo docker run -d -P --name ${fs}-${suffix} -v ${mnt}:/mnt ${fs}:latest fsIp=`docker inspect -f '{{.NetworkSettings.IPAddress}}' ${fs}-${suffix}` # 运行解析服务 docker stop ${dns}-${suffix} && docker rm ${dns}-${suffix} || echo docker run -d -P --name ${dns}-${suffix} ${dns}:latest docker exec ${dns}-${suffix} bash -c "echo '${fs} A ${fsIp}' >> /var/named/named.localhost" docker restart ${dns}-${suffix} dnsIp=`docker inspect -f '{{.NetworkSettings.IPAddress}}' ${dns}-${suffix}` # 修改宿主机dns sed -i "/${suffix}/d" /etc/resolv.conf sed -i "1inameserver ${dnsIp} # ${suffix}" /etc/resolv.conf # 构建镜像 for LINE in ${DOCKER_BUILD_LIST} do FROM_IMAGE=`echo ${LINE} | awk -F',' '{print $1}'` TO_IMAGE=`echo ${LINE} | awk -F',' '{print $2}'` DOCKERFILE_FILE=`echo ${LINE} | awk -F',' '{print $3}'` DOCKERFILE_PATH=${DOCKERFILE_FILE%/*} [ -n "${DOCKER_REGISTRY}" ] && docker pull ${DOCKER_REGISTRY}${TO_IMAGE} || echo "${DOCKER_REGISTRY}${TO_IMAGE} not found!" sed -i '/^FROM/d' ${DOCKERFILE_FILE} if [ 'scratch' != "${FROM_IMAGE}" ] then sed -i "1iFROM ${DOCKER_REGISTRY}${FROM_IMAGE}" ${DOCKERFILE_FILE} else sed -i "1iFROM ${FROM_IMAGE}" ${DOCKERFILE_FILE} fi docker build -t ${DOCKER_REGISTRY}${TO_IMAGE} -f ${DOCKERFILE_FILE} ${DOCKERFILE_PATH} [ -n "${DOCKER_REGISTRY}" ] && docker push ${DOCKER_REGISTRY}${TO_IMAGE} done # 清理 sed -i "/${suffix}/d" /etc/resolv.conf docker stop ${dns}-${suffix} && docker rm ${dns}-${suffix} || echo docker stop ${fs}-${suffix} && docker rm ${fs}-${suffix} || echo ``` - build.list: ```bash scratch,library/centos:7.2.1511,library/centos/centos=7.2.1511.df base/centos:7.2.1511-zh,base/jdk:8u101,base/jdk/jdk=8u101.df base/jdk:8u101,base/gradle:2.14.1-8u101,base/gradle/gradle=2.14.1.df base/jdk:8u101,base/tomcat:8.0.36-8u101,base/tomcat/tomcat=8.0.36.df - 以","分隔为三部分。第一部分:上层镜像,第二部分:目标镜像,第三部分:Dockerfile位置。 ``` 用途:执行build.sh,根据build.list文件所指定的关系,依次构建镜像。