docker for linux

Posted 2021-01-29

1. Dockerfile :
   • dockerfile 是一个包含创建所有命令的文本文件，使用docker build 根据dockerfile命令创建新的镜像
   • FROM tomcat # 参考的基础镜像
   • MAINTAINER #标识镜像创建者
   • 执行命令
     • RUN rm -f /usr/local/tomcat/webapps/ROOT/index.jsp
     • RUN echo "welcome to tomcat!" >/usr/local/tomcat/webapps/ROOT/index.html
2. 构建镜像：跟进dockerfile 文件自动构建镜像
   • docker build -f Dockerfile当前路径 -t xianwei/tomcat:v2 .
     *exp: $ docker build -f dockerfile -t xianwei/tomcat:v2 .
   • [[email protected] ~]$ sudo docker build -f /dockerfile -t xianwei/tomcat:v2 .
     Sending build context to Docker daemon 196.6MB
     Step 1/4 : FROM tomcat
     ---> ef802ca71927
     Step 2/4 : MAINTAINER Eric
     ---> Running in 328055e1575c
     Removing intermediate container 328055e1575c
     ---> 35ebde183840
     Step 3/4 : RUN rm -f /usr/local/tomcat/webapps/ROOT/index.jsp
     ---> Running in 29be0a87fdbc
     Removing intermediate container 29be0a87fdbc
     ---> 567478df2a70
     Step 4/4 : RUN echo "welcome to tomcat!" >/usr/local/tomcat/webapps/ROOT/index.html
     ---> Running in c55851466c73
     Removing intermediate container c55851466c73
     ---> 04819a1dbce5
     Successfully built 04819a1dbce5
     Successfully tagged xianwei/tomcat:v2

3.使用新镜像运行容器
$ sudo docker run --name v2 -p 9999:8080 -d 04819a1dbce5