[Docker] 도커 설치

## Docker 설치

 

① yum (centos)

$ sudo yum -y update

$ sudo yum -y install docker 

 

② apt-get (ubuntu)

$ sudo apt-get update

$ sudo apt-get upgrade

$ sudo apt install -y docker.io

$ sudo apt install -y docker-compose

 

$ sudo usermod -aG docker {사용자명}
$ sudo usermod -aG docker $USER

 

③ wget

$ sudo wget -qO- http://get.docker.com/ | sh

 

[wget 미 설치시 - Centos]

yum install wget 

 

④ curl

$ curl -fsSL https://get.docker.com -o get-docker.sh
$ sudo sh get-docker.sh

 

# Ubuntu

$ sudo apt-get update
$ sudo apt-get install \
    ca-certificates \
    curl \
    gnupg \
    lsb-release

$  curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

$  echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null


$ sudo apt-get update
$ sudo apt-get install docker-ce docker-ce-cli containerd.io

https://docs.docker.com/engine/install/ubuntu/

 

## Docker 버전 확인

$ sudo docker version 

$ sudo docker -v

 

## Docker 자동실행

$ sudo systemctl start docker

$ sudo systemctl is-enabled docker

  -> enable 됐는지 확인
$ sudo systemctl enable docker

   ->  재부팅시 자동으로 docker daemon을 실행

 

* 자동실행 안 했을 시 Cannot connect to the Docker daemon at unix:///var/run/docker.sock. 에러 발생

 

 

## hello-world 실행

$  sudo docker run hello-world

 

위와 같이 Hello from Docker! 가 출력되면 성공!