容器初始化

alpine

Docker 镜像瘦身优化

alpine之创建最小docker镜像

利用Dockerfile修改容器中的apt源(debian源)

os.init

# debian 11 bullseye
echo 'deb http://mirrors.163.com/debian/ bullseye main non-free contrib
deb http://mirrors.163.com/debian/ bullseye-updates main non-free contrib
deb http://mirrors.163.com/debian/ bullseye-backports main non-free contrib
deb-src http://mirrors.163.com/debian/ bullseye main non-free contrib
deb-src http://mirrors.163.com/debian/ bullseye-updates main non-free contrib
deb-src http://mirrors.163.com/debian/ bullseye-backports main non-free contrib
deb http://mirrors.163.com/debian-security/ bullseye/updates main non-free contrib
deb-src http://mirrors.163.com/debian-security/ bullseye/updates main non-free contrib' >sources.list

# debain 10
echo 'deb http://mirrors.163.com/debian/ buster main non-free contrib
deb http://mirrors.163.com/debian/ buster-updates main non-free contrib
deb http://mirrors.163.com/debian/ buster-backports main non-free contrib
deb-src http://mirrors.163.com/debian/ buster main non-free contrib
deb-src http://mirrors.163.com/debian/ buster-updates main non-free contrib
deb-src http://mirrors.163.com/debian/ buster-backports main non-free contrib
deb http://mirrors.163.com/debian-security/ buster/updates main non-free contrib
deb-src http://mirrors.163.com/debian-security/ buster/updates main non-free contrib' >sources.list

#可以看一下别人要安装的是哪些
apt install -y  vim.tiny  curl cron procps #usage vim.tiny  vim太重了 

修改已有官方镜像

注意：记住容器的 ID，稍后还会用到

 docker ps 
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
8511226ff1da        8e022c70c28b  

使用 docker commit 命令来提交更新后的副本。


 4f177bd27a9ff0f6dc2a830403925b5360bfe0b93d476f7fc3231110e7f71b1c^C
root@myxps:~# docker commit -m "Added curl vim.tiny" -a "linuxsa.org" 8511226ff1da   evan886/debian:v1  #是不是这个添加了后面的不用添加tag呢  下次 再试一下 
sha256:9c19bdca07aa14194e93f65264ad42f18dbabc43a8bb6bc3eadd7790a67f2296
root@myxps:~# 


其中，-m 来指定提交的说明信息，跟我们使用的版本控制工具一样；-a 可以指定更新的用户信息；之后是用来创建镜像的容器的 ID；最后指定目标镜像的仓库名和 tag 信息。创建成功后会返回这个镜像的 ID 信息。

使用 docker images 来查看新创建的镜像。

root@myxps:~# docker images 
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
<none>              <none>              9c19bdca07aa        26 seconds ago      118MB
debian              buster-slim         8e022c70c28b        11 days ago         69.2MB
root@myxps:~# 



使用 docker images 来查看新创建的镜像。
root@myxps:~# docker  run -it  9c19bdca07aa  bash  

打上自己的tag
root@myxps:~# docker images 
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
<none>              <none>              9c19bdca07aa        4 minutes ago       118MB
debian              buster-slim         8e022c70c28b        11 days ago         69.2MB

root@myxps:~# docker tag 9c19bdca07aa  evan886/debian:v1 
root@myxps:~# docker images 
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
evan886/debian      v1                  9c19bdca07aa        9 minutes ago       118MB
debian              buster-slim         8e022c70c28b        11 days ago         69.2MB
root@myxps:~# 

root@myxps:~# docker login 


docker push evan886/debian:v1 

利用 Dockerfile 来创建镜像

docker build --tag evan886/centos-nginx:v1 -f nginx/Dockerfile .


docker run --name nginx -p 80:80 -v /data/apps/nginx/html/:/data/apps/nginx/html/ -d  -it 9a4ccef0484d

登入容器：
docker exec -it jenkins /bin/bash


docker push evan886/centos-nginx:v1

see also

Docker 镜像使用