首先拉取一个镜像,在这里以NGINX为例

[root@DockServer opt]# docker pull nginx
[root@DockServer opt]# docker p_w_picpaths
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nginx               latest              b8efb18f159b        3 weeks ago         107MB

启动NGINX镜像,映射出端口

[root@DockServer opt]# docker run --name webserver -d -p 80:80 nginx
8f62585b370ca34eb8c438adbab0f972e1990cee25000a742c6a2d8e7ee7ba38
[root@DockServer opt]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
8f62585b370c        nginx               "nginx -g 'daemon ..."   6 seconds ago       Up 6 seconds        0.0.0.0:80->80/tcp       webserver

访问端口,直接用命令行访问,

[root@DockServer opt]# curl http://127.0.0.1



Welcome to nginx!



Welcome to nginx!

If you see this page, the nginx web server is successfully installed and working. Further configuration is required.

For online documentation and support please refer to nginx.org.
Commercial support is available at nginx.com.

Thank you for using nginx.

可以看到能够访问在nginx docker里的东东了,下面我们修改下首页内容

进入nginx docker 里面进行修改

进入docker
[root@DockServer opt]# docker exec -it webserver bash
root@8f62585b370c:/# echo '

Hello, Docker!

' > /usr/share/nginx/html/index.html root@8f62585b370c:/#  exit exit

再次访问看看

[root@DockServer opt]# curl http://127.0.0.1

Hello, Docker!

可以看出,已经修改成功,我们保存成镜像

[root@DockServer opt]# docker commit  --author "Ding Jin "  --message "修改nginx默认网页"  webserver webserver:v2
sha256:ca35d11b57bac6e3e4ebab15aaff528c8530f7f5e59e00f58fa61e86edf1aa91
[root@DockServer opt]# docker p_w_picpaths
REPOSITORY             TAG                 IMAGE ID            CREATED             SIZE
webserver              v2                  ca35d11b57ba        6 seconds ago       107MB
nginx                  latest              b8efb18f159b        3 weeks ago         107MB

已经可以看到webserver:v2镜像了,运行下
[root@DockServer opt]# docker run --name web2 -d -p 81:80 webserver:v2
1647edeba49aa664c0ccf642248f6b30b36c6b08990ede580a5803f1a59ae545
[root@DockServer opt]# curl http://127.0.0.1:81

Hello, Docker!

可以了解以下命令,

查看webserver做了哪些更改,即和源镜像对比不同

[root@DockServer opt]# docker diff webserver
C /root
A /root/.bash_history
C /run
A /run/nginx.pid
C /var
C /var/cache
C /var/cache/nginx
A /var/cache/nginx/uwsgi_temp
A /var/cache/nginx/client_temp
A /var/cache/nginx/fastcgi_temp
A /var/cache/nginx/proxy_temp
A /var/cache/nginx/scgi_temp
C /usr
C /usr/share
C /usr/share/nginx
C /usr/share/nginx/html

查看webserver:v2历史文件变动记录

[root@DockServer opt]# docker history webserver:v2
IMAGE               CREATED             CREATED BY                                      SIZE                COMMENT
ca35d11b57ba        4 minutes ago       nginx -g daemon off;                            98B                 修改nginx默认网页
b8efb18f159b        3 weeks ago         /bin/sh -c #(nop)  CMD ["nginx" "-g" "daem...   0B                  
           3 weeks ago         /bin/sh -c #(nop)  STOPSIGNAL [SIGTERM]         0B                  
           3 weeks ago         /bin/sh -c #(nop)  EXPOSE 80/tcp                0B                  
           3 weeks ago         /bin/sh -c ln -sf /dev/stdout /var/log/ngi...   0B                  
           3 weeks ago         /bin/sh -c apt-get update  && apt-get inst...   52.2MB              
           3 weeks ago         /bin/sh -c #(nop)  ENV NJS_VERSION=1.13.3....   0B                  
           3 weeks ago         /bin/sh -c #(nop)  ENV NGINX_VERSION=1.13....   0B                  
           3 weeks ago         /bin/sh -c #(nop)  MAINTAINER NGINX Docker...   0B                  
           3 weeks ago         /bin/sh -c #(nop)  CMD ["bash"]                 0B                  
           3 weeks ago         /bin/sh -c #(nop) ADD file:fa8dd9a679f473a...   55.2MB

结合上篇,我们上传到本地私有仓库,然后就直接可以在本地调用了~~