CentOS Docker 설치

Docker 설치

curl -fsSL https://get.docker.com/ | sh
sudo systemctl enable --now docker
sudo usermod -aG docker <user>   # 재로그인 필요
docker -v
docker run hello-world

특정 버전 (yum)

yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum list docker-ce --showduplicates | sort -r
yum install docker-ce-<version>   # 예: docker-ce-20.10.15-3.el7

Docker Compose

sudo curl -L "https://github.com/docker/compose/releases/download/v2.5.0/docker-compose-$(uname -s)-$(uname -m)" \
  -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
docker-compose -v

Troubleshoot: docker.sock permission denied

# 권장: docker 그룹 소속 (재로그인)
sudo usermod -aG docker <user>
# 임시: 소켓 그룹
sudo chown root:docker /var/run/docker.sock
# 비권장: chmod 666