Docker进阶-使用Dockerfile

Docker进阶-使用Dockerfile

Dockerfiel介绍

Dockerfile构建过程

DockerFile指令

FROM #基础镜像，一切从这里开始构建 MAINTAINER #镜像是谁写的，姓名＋邮箱 RUN #镜像构建的时候需要运行的命令 ADD #步骤：Tomcat镜像，这个tomcat压缩包！添加内容 WORKDIR #镜像工作目录 VOLUME #挂载的目录 EXPOSE #暴露端口配置 CMD #指定这个容器启动的时候要运行的命令，只有最后一个会生效，可被替代 ["ls","-a"] ENTRYPOINT #指定这个容器启动的时候要运行的命令，可以追加命令 ["ls","-a"] ONBUILD #当构建一个被继承DockerFile 这个时候就会运行ONBUILD 的指令，出发指令 COPY #类似ADD，将我们的文件拷贝到镜像中 ENV #构建的时候设置环境变量

创建一个自己的centos

1.#编写一个Dockerfile的文件 [root@localhost dockerfile]# cat mydockerfile-centos FROM centos MAINTAINER xaingguo ENV MYPATH /usr/local WORKDIR $MYPATH RUN yum -y install vim RUN yum -y install net-tools EXPOSE 80 CMD echo $MYPATH CMD echo "----end----" CMD /bin/bash 2.通过这个文件构建镜像 命令docker bulid -f dockerfile文件 -t 镜像名:[tag] . docker build -f mydockerfile-centos -t mycentos:0.1 . Successfully built 5a6c2a12fada Successfully tagged mycentos:0.1 3.测试运行

实操搞一下：Tomcat镜像

FROM centos:7 MAINTAINER nature COPY readme.txt /usr/local/readme.txt ADD jdk-8u11-linux-x64.tar.gz /usr/local ADD apache-tomcat-9.0.22.tar.gz /usr/local RUN yum -y install vim ENV MYPATH /usr/local WORKDIR $MYPATH ENV JAVA_HOME /usr/local/jdk1.8.0_11 ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar ENV CATALINA_HOME /usr/local/apache-tomcat-9.0.22 ENV CATALINA_BASH /usr/local/apache-tomcat-9.0.22 ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/lib:CATALINA_HOME/bin EXPOSE 8080 CMD /usr/local/apache-tomcat-9.0.22/bin/startup.sh && tail -F /usr/local/apache-tomcat-9.0.22/bin/logs/catalina.out

3.构建镜像

[root@xiangguo tomcat]# docker build -t diytomcat . [root@xiangguo tomcat]# docker images

[root@xiangguo tomcat]# docker run -d -p 9090:8080 --name xgtomcat -v /home/nature/build/tomcat/test:/usr/local/apache-tomcat-9.0.22/webapps/test -v /home/nature/build/tomcat/tomcatlogs/:/usr/local/apache-tomcat-9.0.22/logs diytomcat

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发布自己的镜像

DockerHub地址：<~]# docker login --help Usage: docker login [OPTIONS] [SERVER] Log in to a Docker registry. If no server is specified, the default is defined by the daemon. Options: -p, --password string Password --password-stdin Take the password from stdin -u, --username string Username

登陆成功后，提交镜像

[root@xiangguo ~]# docker login -u liuzhaoxuan Password: WARNING! Your password will be stored unencrypted in /root/.docker/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded [root@xiangguo ~]# docker push liuzhaoxuan/diytomcat:1.0 The push refers to repository [docker.io/liuzhaoxuan/diytomcat] An image does not exist locally with the tag: liuzhaoxuan/diytomcat

[root@xiangguo ~]# docker tag eb50604912df lzx/diytomcat:1.0 [root@xiangguo ~]# docker iomages docker: 'iomages' is not a docker command. See 'docker --help' [root@xiangguo ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE diytomcat latest eb50604912df 8 hours ago 727MB lzx/diytomcat 1.0 eb50604912df 8 hours ago 727MB mysql latest 5c62e459e087 8 weeks ago 556MB cmdtest latest dc266f7bb898 2 months ago 204MB nginx latest f0b8a9a54136 3 months ago 133MB tomcat latest c0e850d7b9bb 3 months ago 667MB hello-world latest d1165f221234 5 months ago 13.3kB centos 7 8652b9f0cb4c 9 months ago 204MB [root@xiangguo ~]# docker push lzx/diytomcat:1.0 The push refers to repository [docker.io/lzx/diytomcat] 962fe093e7b9: Preparing 168475953090: Preparing cc841424475a: Preparing d3b8ca1656d5: Preparing 0ac7206ca0c3: Preparing 174f56854903: Waiting denied: requested access to the resource is denied 但是会拒绝

[root@xiangguo ~]# docker tag eb50604912df liuzhaoxuan/lzxtomcat:1.0 [root@xiangguo ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE diytomcat latest eb50604912df 22 hours ago 727MB liuzhaoxuan/lzxtomcat 1.0 eb50604912df 22 hours ago 727MB mysql latest 5c62e459e087 8 weeks ago 556MB cmdtest latest dc266f7bb898 2 months ago 204MB nginx latest f0b8a9a54136 3 months ago 133MB tomcat latest c0e850d7b9bb 3 months ago 667MB hello-world latest d1165f221234 5 months ago 13.3kB centos 7 8652b9f0cb4c 9 months ago 204MB [root@xiangguo ~]# docker push liuzhaoxuan/lzxtomcat:1.0 The push refers to repository [docker.io/liuzhaoxuan/lzxtomcat] 962fe093e7b9: Pushed 168475953090: Pushing [===> ] 12.5MB/183.8MB cc841424475a: Pushing [====================> ] 6.31MB/15.49MB d3b8ca1656d5: Pushing [> ] 4.368MB/324MB 0ac7206ca0c3: Pushed 174f56854903: Pushing [==> ] 11.99MB/203.9MB 这样就正在上传。

小结

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