仓库配置及安装启动
[root@localhost ~]# yum install -y yum-utils device-mapper-persistent-data lvm2 [root@localhost ~]# yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo [root@localhost ~]# yum makecache fast [root@localhost ~]# yum -y install docker-ce [root@localhost ~]# service docker start Redirecting to /bin/systemctl start docker.service
版本查看
[root@localhost ~]# docker -v Docker version 18.09.0, build 4d60db4
镜像下载
[root@localhost ~]# docker pull alpine Using default tag: latest latest: Pulling from library/alpine 4fe2ade4980c: Pull complete Digest: sha256:621c2f39f8133acb8e64023a94dbdf0d5ca81896102b9e57c0dc184cadaf5528 Status: Downloaded newer image for alpine:latest
查看的本地镜像
[root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE alpine latest 196d12cf6ab1 3 months ago 4.41MB
镜像启动成容器
[root@localhost ~]# docker run -it alpine sh / #
容器里创建一个大小为20M
/ # dd if=/dev/zero of=chenxi bs=10M count=2 2+0 records in 2+0 records out / # ls -l chenxi -rw-r--r-- 1 root root 20971520 Dec 12 04:31 chenxi
用快捷键Ctrl+p,q退出容器，根据此运行的容器制作镜像
[root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 292d32b4b3a1 alpine "sh" 15 minutes ago Up 15 minutes condescending_wu [root@localhost ~]# docker commit 292d32b4b3a1 chenxi:test sha256:cfcb3e42b392ac74fb8984f339916cbd062a968f6398af47e24d55dbb4364152 [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE chenxi test cfcb3e42b392 13 seconds ago 25.4MB alpine latest 196d12cf6ab1 3 months ago 4.41MB
查看镜像层
[root@localhost ~]# docker history alpine:latest IMAGE CREATED CREATED BY SIZE COMMENT 196d12cf6ab1 3 months ago /bin/sh -c #(nop) CMD ["/bin/sh"] 0B <missing> 3 months ago /bin/sh -c #(nop) ADD file:25c10b1d1b41d46a1… 4.41MB [root@localhost ~]# docker history chenxi:test IMAGE CREATED CREATED BY SIZE COMMENT cfcb3e42b392 2 minutes ago sh 21MB 196d12cf6ab1 3 months ago /bin/sh -c #(nop) CMD ["/bin/sh"] 0B <missing> 3 months ago /bin/sh -c #(nop) ADD file:25c10b1d1b41d46a1… 4.41MB
使用dockerfil简单构建tomcat镜像文件
[root@localhost ~]# ls /tomcat/ apache-tomcat-9.0.13.tar.gz Dockerfile [root@localhost ~]# cat /tomcat/Dockerfile FROM centos RUN mkdir /tomcat && yum -y install java COPY apache-tomcat-9.0.13.tar.gz /tomcat RUN tar -zvxf /tomcat/apache-tomcat-9.0.13.tar.gz -C /usr/local/ EXPOSE 8080 CMD ["/usr/local/apache-tomcat-9.0.13/bin/catalina.sh", "run"] [root@localhost tomcat]# docker build -f Dockerfile -t tomcat:chenxi . Sending build context to Docker daemon 9.991MB Step 1/6 : FROM centos ---> 1e1148e4cc2c Step 2/6 : RUN mkdir /tomcat && yum -y install java ---> Using cache ---> 05e991a5d3f7 Step 3/6 : COPY apache-tomcat-9.0.13.tar.gz /tomcat ---> Using cache ---> 3dffdd201d5f Step 4/6 : RUN tar -zvxf /tomcat/apache-tomcat-9.0.13.tar.gz -C /usr/local/ ---> Using cache ---> 1b8021e0f9fb Step 5/6 : EXPOSE 8080 ---> Using cache ---> a3d6bc853d8c Step 6/6 : CMD ["/usr/local/apache-tomcat-9.0.13/bin/catalina.sh", "run"] ---> Using cache ---> 3969b96f4e53 Successfully built 3969b96f4e53 Successfully tagged tomcat:chenxi
查看构建的容器镜像并启动
[root@localhost tomcat]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
tomcat 7 3969b96f4e53 7 minutes ago 445MB
tomcat chenxi 3969b96f4e53 7 minutes ago 445MB
<none> <none> 2b60cff33319 2 days ago 435MB
<none> <none> 0717bf973613 2 days ago 435MB
centos latest 1e1148e4cc2c 8 days ago 202MB
[root@localhost tomcat]# docker run -d --name chenxi -p 8080:8080 tomcat:chenxi
a7713ecd235158cdc7c276d057a8fb06561002f119d80b6ee882810e1d3c8488
[root@localhost tomcat]# ss -lntp
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:22 *:*
users:(("sshd",pid=1022,fd=3))LISTEN 0 100 127.0.0.1:25 *:*
users:(("master",pid=1293,fd=13))LISTEN 0 128 :::8080 :::*
users:(("docker-proxy",pid=2259,fd=4))LISTEN 0 128 :::22 :::*
users:(("sshd",pid=1022,fd=4))LISTEN 0 100 ::1:25 :::*
users:(("master",pid=1293,fd=14))
