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依赖

docker使用

安装docker 使用yum安装最新版本docker yum install docker

查看docker版本

[root@localhost ~]# docker version Client: Version: 1.13.1 API version: 1.26 Package version: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

下载tomcat

[root@localhost ~]# docker pull tomcat Using default tag: latest Trying to pull repository docker.io/library/tomcat ... latest: Pulling from docker.io/library/tomcat e9afc4f90ab0: Pull complete 989e6b19a265: Pull complete af14b6c2f878: Pull complete 5573c4b30949: Pull complete fb1a405f128d: Pull complete 612a9f566fdc: Pull complete cf63ebed1142: Pull complete fbb20561cd50: Pull complete e99c920870d7: Pull complete b7f793f2be47: Pull complete Digest: sha256:81c2a95e5b1b5867229d75255abe54928d505deb81c8ff8949b61fde1a5d30a1 Status: Downloaded newer image for docker.io/tomcat:latest [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE docker.io/tomcat latest 2eb5a120304e 3 weeks ago 647 MB

docker images查看本地仓库有哪些镜像。

启动tomcat

[root@localhost ~]# docker run -d -p 80:8080 tomcat:latest 162820979bc3ca1e9958b548ef06262ac34e2ddd9010b10ee52bfdf3a6ffca58 [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 162820979bc3 tomcat:latest "catalina.sh run" About a minute ago Up About a minute 0.0.0.0:80->8080/tcp eloquent_spence

上面设置了端口映射，虚拟机的80端口映射到docker容器的tomcat的8080端口。这样就可以在虚拟机外部访问docker的内容了。 下图可以看到正常访问到tomcat了，但是不知道为何tomcat返回了404。 停止容器

[root@localhost ~]# docker stop 162820979bc3 162820979bc3 [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

服务停止后就无法再访问tomcat了：