Docker 安裝流程

原本的 Docker 安裝流程是寫在另一篇文章中，後來覺得有必要寫更詳細一些
所以決定再寫一篇

1. 安裝 Docker CE

參考: https://docs.docker.com/engine/installation/

1-1. 移除舊版本

sudo apt-get remove docker docker-engine docker.io

1-2. 安裝 Docker CE

SET UP THE REPOSITORY

sudo apt-get update
 
sudo apt-get install \
  apt-transport-https \
  ca-certificates \
  curl \
  software-properties-common
 
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
 
sudo add-apt-repository \
  "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) \
  stable"

INSTALL DOCKER CE

sudo apt-get update
sudo apt-get install docker-ce

VERIFY

sudo docker run hello-world

2. Docker run as non-root

這個是非必要的動作，不過在開發時會比較方便

參考 :

• Manage Docker as a non-root user
• [Docker] 使用非 root 權限來執行 docker client

Add the docker group if it doesn't already exist:

sudo groupadd docker

Add the connected user $USER to the docker group. Change the user name to match your preferred user if you do not want to use your current user:

sudo gpasswd -a $USER docker

Either do a newgrp docker or log out/in to activate the changes to groups.
You can check if you can run docker without sudo:

docker run hello-world