docker commit 提交容器成为一个新的副本，有点像套娃
# 命令和git原理类似
docker commit -m="提交的描述信息" -a="作者" 容器id 目标镜像名:[TAG]
实战测试
#step-1 启动一个默认的tomcat
[root@ddkk.com ~]# docker run -d -p 3355:8080 --name tomcat02 tomcat
57644fa210a03bfea17b961b804bb528a94935700f0074b084b0603f48521889
[root@ddkk.com ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
57644fa210a0 tomcat "catalina.sh run" 15 seconds ago Up 14 seconds 0.0.0.0:3355->8080/tcp, :::3355->8080/tcp tomcat02
3b6ca0890fa0 portainer/portainer "/portainer" 33 minutes ago Up 28 minutes 0.0.0.0:8088->9000/tcp, :::8088->9000/tcp dreamy_robinson
#step-2 发现这个默认的tomcat没有webapps应用，镜像的原因，官方的镜像默认 webapps下面是没有文件的
[root@ddkk.com ~]# docker exec -it 57644fa210a0 /bin/bash
root@57644fa210a0:/usr/local/tomcat# ls
BUILDING.txt CONTRIBUTING.md LICENSE NOTICE README.md RELEASE-NOTES RUNNING.txt bin conf lib logs native-jni-lib temp webapps webapps.dist work
root@57644fa210a0:/usr/local/tomcat# ls webapps/
root@57644fa210a0:/usr/local/tomcat# ls webapps.dist/
ROOT docs examples host-manager manager
#step-3 自己拷贝基本文件进去
root@57644fa210a0:/usr/local/tomcat# cp -r webapps.dist/* webapps/
root@57644fa210a0:/usr/local/tomcat# ls webapps/
ROOT docs examples host-manager manager
root@57644fa210a0:/usr/local/tomcat# exit
exit
#step-4 commit
[root@ddkk.com ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
57644fa210a0 tomcat "catalina.sh run" 2 minutes ago Up 2 minutes 0.0.0.0:3355->8080/tcp, :::3355->8080/tcp tomcat02
3b6ca0890fa0 portainer/portainer "/portainer" 35 minutes ago Up 30 minutes 0.0.0.0:8088->9000/tcp, :::8088->9000/tcp dreamy_robinson
[root@ddkk.com ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
tomcat 9.0 266d1269bb29 7 days ago 668MB
tomcat latest 266d1269bb29 7 days ago 668MB
nginx latest dd34e67e3371 8 days ago 133MB
elasticsearch 7.14.0 e347b2b2d6c1 3 weeks ago 1.04GB
portainer/portainer latest 580c0e4e98b0 5 months ago 79.1MB
centos latest 300e315adb2f 8 months ago 209MB
[root@ddkk.com ~]# docker commit -m="add webapps file" -a="gelaotou" 57644fa210a0 tomcat_gelaotou:1.0
sha256:fabb99d62dfe97e8146d75b7a18840f812dff6c1c24916016012306735a9139a
#step-5 校验
[root@ddkk.com ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
tomcat_gelaotou 1.0 fabb99d62dfe 6 seconds ago 673MB
tomcat 9.0 266d1269bb29 7 days ago 668MB
tomcat latest 266d1269bb29 7 days ago 668MB
nginx latest dd34e67e3371 8 days ago 133MB
elasticsearch 7.14.0 e347b2b2d6c1 3 weeks ago 1.04GB
portainer/portainer latest 580c0e4e98b0 5 months ago 79.1MB
centos latest 300e315adb2f 8 months ago 209MB
