docker commit命令使用
所属分类 docker
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docker commit 可用于定制镜像 ,不建议使用
推荐使用 Dockerfile 定制镜像
docker run --name nginx -d -p 8080:80 nginx
注意内部端口号是 80 !!!
8080:80 !!!
curl http://127.0.0.1:8080
netstat -anlp |grep 8080
tcp6 0 0 :::8080 :::* LISTEN 9613/docker-proxy-c
docker exec -it nginx bash
进入容器的shell
echo 'Hello, Docker!' > /usr/share/nginx/html/index.html
exit
curl http://127.0.0.1:8080
Hello, Docker!
修改了容器的文件,也就是改动了容器的存储层。通过 docker diff 命令看到具体的改动
docker diff nginx
C /root
A /root/.bash_history
C /run
A /run/nginx.pid
A /run/secrets
C /usr
C /usr/share
C /usr/share/nginx
C /usr/share/nginx/html
C /usr/share/nginx/html/index.html
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
docker commit 将容器的存储层保存下来成为镜像
在原有镜像的基础上,叠加上容器的存储层,构成新的镜像。
docker commit --author "dugang" --message "index.html update" nginx nginx:v2
docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx v2 27c7bba6e8bf 6 seconds ago 109 MB
docker.io/nginx latest 53f3fd8007f7 2 days ago 109 MB
docker.io/ubuntu latest d131e0fa2585 13 days ago 102 MB
docker.io/hello-world latest fce289e99eb9 4 months ago 1.84 kB
docker run --name nginx-v2 -d -p 8090:80 nginx:v2
curl http://127.0.0.1:8090
Hello, Docker!
docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ca638074b505 nginx:v2 "nginx -g 'daemon ..." 30 seconds ago Up 29 seconds 0.0.0.0:8090->80/tcp nginx-v2
15a64ee6fdf3 nginx "nginx -g 'daemon ..." 12 minutes ago Up 12 minutes 0.0.0.0:8080->80/tcp nginx
docker image ls nginx
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx v2 27c7bba6e8bf 2 minutes ago 109 MB
docker.io/nginx latest 53f3fd8007f7 2 days ago 109 MB
docker history 查看镜像历史记录
docker history nginx:v2
IMAGE CREATED CREATED BY SIZE COMMENT
27c7bba6e8bf 3 minutes ago nginx -g daemon off; 204 B index.html update
53f3fd8007f7 2 days ago /bin/sh -c #(nop) CMD ["nginx" "-g" "daem... 0 B
2 days ago /bin/sh -c #(nop) STOPSIGNAL SIGTERM 0 B
2 days ago /bin/sh -c #(nop) EXPOSE 80 0 B
2 days ago /bin/sh -c ln -sf /dev/stdout /var/log/ngi... 22 B
2 days ago /bin/sh -c set -x && apt-get update && a... 54.1 MB
2 days ago /bin/sh -c #(nop) ENV NJS_VERSION=1.15.12... 0 B
2 days ago /bin/sh -c #(nop) ENV NGINX_VERSION=1.15.... 0 B
2 days ago /bin/sh -c #(nop) LABEL maintainer=NGINX ... 0 B
2 days ago /bin/sh -c #(nop) CMD ["bash"] 0 B
2 days ago /bin/sh -c #(nop) ADD file:fcb9328ea4c1156... 55.3 MB
使用 docker commit 命令,手动操作给旧的镜像添加了新的一层,形成新的镜像, 多层存储机制
docker commit 对镜像的操作都是黑箱操作,生成的镜像被称为黑箱镜像 ,不推荐使用
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