Docker 常用指令

Env:

• 安裝與啟動

  在安裝 Docker 前先更新一下 YUM Repository:

  # yum -y update

  更新 YUM Repository 後可以安裝 Docker 及其相關套件:

  # yum -y install docker docker-registry

  安裝好 Docker 後, 啟動 Docker 及設定 Docker 開機自動啟動:

  # systemctl enable docker

  # systemctl start docker

  要檢查 Docker 是否正確啟動, 可用 status 選項:

  # systemctl status docker.service

• 登入 Docker hub to push or commit images

  # docker login

• Show host IP

ip addr show docker0 | grep -Po 'inet \K[\d.]+'

• Enable / Disable Hyper-V

• Disable -> Docker’ll work and VirtualBox’ll fail.

  bcdedit /set hypervisorlaunchtype off

• Enable -> Docker’ll fail and VirtualBox’ll work.

  bcdedit /set hypervisorlaunchtype auto

• Ref: https://dotblogs.com.tw/d___s/2018/08/02/virtualboxruntimeerror

Build image:

• Create a file with multiple lines content in Dockerfile

RUN echo $'[repo] \n\
name            = YUM Repository \n\
baseurl         = https://example.com/packages/ \n\
enabled         = 1 \n\
gpgcheck        = 0' > /etc/yum.repos.d/Repo.repoxyz

Build container:

• Start and attach to container

docker start -ai {{container_id}}
#or start and docker exec 

• Build and expose port to container

• docker run -d -p 8080:80 {image}

• Build and go into container bash

  docker run -t -i ubuntu:12.04 bash

• Build, expose port and go into container bash

  docker run -itd -p 8080:80 {image} bash

   

  # -p host_port:container_port

About Image:

• 清除 <none> images

docker rmi $(docker images -f "dangling=true" -q)

• 更新 image

• docker commit -m “Setup to Jupyter truly” -a “John” {containerId} {image}

• Build image

docker build -t jj/image -f Dockerfilexxx .

• Push to Repository

  docker push {image}

• Check the files permission in docker image

  docker run –rm -ti –entrypoint sh {image} -c “ls -alF /usr/local/bin/”

About Container:

• Remove dead container

• Linux

sudo rm -rf /var/lib/docker/<storage_driver>/{CONTAINER ID}/

• Windows

del D:\ProgramData\docker\containers\{CONTAINER ID}
del D:\ProgramData\docker\windowsfilter\{CONTAINER ID}

• Check screen log output

docker logs -f <CONTAINER> --tail {lineNumber}

• List all the containers

  docker ps -aq

• Stop all running containers

  docker stop $(docker ps -aq)

• Remove all containers

  docker rm $(docker ps -aq)

• Remove all images

  docker rmi $(docker images -q)

• Copy file from host to container

  docker cp foo.txt mycontainer:/foo.txt

  from container to host

  docker cp mycontainer:/foo.txt foo.txt

• 進入 Running Container bash

  docker exec -i -t <CONTAINER_ID> bash

  docker exec -i -t <CONTAINER_ID> sh

• 進入 Stopped(Exited) container bash

docker images   # Find the {imageId} of exited container
docker run -it --entrypoint=sh {imageId}

# not verify? 
docker start -ai {CONTAINER_ID} bash

• 修改初始 command 並 start new container

  docker run -ti –entrypoint=sh <IMAGE_NAME>