Docker

Install：

安装完成后需要sudo usermod -aG docker [user]后重新登录，以非root用户使用docker。

docker run command时，报docker: Cannot connect to the Docker daemon. Is the docker daemon running on this host？检查docker是否已启动，ps -aux | grep docker，若已启动依然报此错误，一般是用户导致的，可sudo执行，或添加docker用户。

docker run hello-world

run：创建并运行一个docker container，container是极简的linux操作系统

hello-world：加载名为hello-world的image进这个container，image是加载进container的程序

Docker Hub：全球共享docker image库。

构建image:

mkdir mydocker && cd mydocker

vim Dockerfile

docker build -t docker-whale . # 读取当前目录下的Dockerfile，构建名为docker-whale的image

docker run docker-whale

docker images

# REPOSITORY TAG IMAGE ID CREATED SIZE

# docker-whale latest bd523f778016 About an hour ago 274.5 MB

# hello-world latest 94df4f0ce8a4 3 weeks ago 967 B

# docker/whalesay latest 6b362a9f73eb 12 months ago 247 MB
docker tag bd523f778016 [account]/docker/whalesay latest # 用image-id和docker-hub-account和image名称标记image

docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

# docker-whale latest bd523f778016 About an hour ago 274.5 MB

# yimzncy/docker-whale latest bd523f778016 About an hour ago 274.5 MB

# hello-world latest 94df4f0ce8a4 3 weeks ago 967 B

# docker/whalesay latest 6b362a9f73eb 12 months ago 247 MB

sudo docker login --username=[account] --email=[account]@gmail.com # 登录docker hub

docker push docker/whalesay # push image

docker rmi -f bd523f778016/docker-whale # 删除image可用id或name

docker run [account]/docker/whalesay # pull && load image

MORE:
https://docs.docker.com/docker-hub/