Docker basis

   Author: Gentleman.Hu
   Create Time: 2020-11-01 10:47:02
   Modified by: Gentleman.Hu
   Modified time: 2020-11-02 11:23:19
   Email: [email protected]
   Home: https://crushing.xyz
   Description: Docker new one

Docker

Installation

get-started

对应系统下载.

安装好,在托盘图标可以看到状态,启动成功

• 查看版本

Images,Containers,and Ports

docker image COMMAND

• show containers

docker image ps

• 基本命令平时就查看,其他build等简单使用

docker container COMMAND

• show containers

docker container ls [-a] 显示全部(包含未运行的)

image就是镜像,静态的,通过image可以生成container

docker pull COMMAND

拉取image

docker run COMMAND

docker run --name name -d imagename

通过image创建container并运行 -d,dettach

• 开放端口

docker run -p outer:inner imagename

outer: 外部端口 inner: 内部端口

比如 8080:80 ,外部宿主计算机端口映射到docker内部80端口

• 开放多个端口

-p 8080:80 -p 2222:222 -p etc...

• 删除container

docker rm -f containername

• 删除image

docker rmi imagename

Volumes - Host adn Container

• share file from host

docker run --name name -v /some/folder:/usr/local/nginx/html:ro -p 8080:80 nginx:latest

• going inside container

docker exec -it containername bash(/bin/sh)

Building Images

• Dockerfile

FROM ubuntu:18.04
COPY . /app
RUN make /app
CMD python /app/app.py

Reference

• docker build

• docker push

推送到duckerhub或者其他docker仓库

• .dockerignore

Reference

# comment
*/temp*
*/*/temp*
temp?

Rule	Behavior
# comment	Ignored.
*/temp*	Exclude files and directories whose names start with temp in any immediate subdirectory of the root. For example, the plain file /somedir/temporary.txt is excluded, as is the directory /somedir/temp.
*/*/temp*	Exclude files and directories starting with temp from any subdirectory that is two levels below the root. For example, /somedir/subdir/temporary.txt is excluded.
temp?	Exclude files and directories in the root directory whose names are a one-character extension of temp. For example, /tempa and /tempb are excluded.

此文件忽略通过规则定义的文件 然而,往往忽略的,需要在dockerfile中重新RUN来在部署时候生成module等

• Alpine

很精简的,体积很小.适合集成docker中

official docker_alpine

FROM alpine:3.7
RUN apk add --no-cache mysql-client
ENTRYPOINT ["mysql"]

一个使用例子 36.8MB

Resources

• https://hub.docker.com/_/alpine

• dockerignore