Docker Installation

Docker Installation#

Install on CentOS#

Prerequisites#

To install Docker Engine, you need a maintained version of CentOS 7

Installation methods#

Install using the repository#

sudo yum install -y yum-utils
#yum-config-manager --add-repo https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/docker-ce.repo
sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

Install Docker Engine

  1. sudo yum install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

    • Or: sudo yum install -y docker-ce docker-ce-cli containerd.io

    • Or: sudo yum install -y --allowerasing docker-ce docker-ce-cli containerd.io

  2. sudo systemctl start docker

  3. docker run hello-world

sudo systemctl stop docker
# Specific version
sudo yum list docker-ce --showduplicates | sort -r
sudo yum install docker-ce-<VERSION_STRING> docker-ce-cli-<VERSION_STRING> containerd.io docker-buildx-plugin docker-compose-plugin

Install from a package#

#curl https://download.docker.com/linux/centos/docker-ce.repo -o /etc/yum.repos.d/docker-ce.repo
curl https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/docker-ce.repo -o /etc/yum.repos.d/docker-ce.repo
yum install https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.13-3.2.el7.x86_64.rpm

Uninstall Docker Engine#

  1. yum remove docker-ce docker-ce-cli containerd.io

  2. rm -rf /var/lib/docker

Tips#

CentOS 8 Errors:

  • Problem 1: problem with installed package podman-1.4.2-5.module_el8.1.0+237+63e26edc.x86_64

  • Problem 2: problem with installed package buildah-1.9.0-5.module_el8.1.0+237+63e26edc.x86_64

rpm -q podman
sudo dnf remove podman
rpm -q buildah
sudo dnf remove buildah

sudo systemctl enable docker
sudo mkdir /etc/docker
sudo vi /etc/docker/daemon.json
{
  "registry-mirrors": ["https://docker.mirrors.ustc.edu.cn/"],
  "log-driver": "json-file",
  "log-opts": {"max-size":"500m", "max-file":"3"}
}
sudo systemctl daemon-reload
sudo systemctl restart docker

Util#

#停止所有容器
docker stop $(docker ps -aq)

Docker Registry#

  • docker.io: Docker Hub 官方镜像仓库

  • gcr.io、k8s.gcr.io: 谷歌镜像仓库

  • quay.io: Red Hat 镜像仓库

  • ghcr.io: GitHub 镜像仓库

修改默认存储路径#

docker info
#默认目录：Docker Root Dir: /var/lib/docker
systemctl stop docker.service
mkdir -p /home/docker/
#使用 rsync 替代 cp 解决断点续传问题
rsync -avz /var/lib/docker/* /home/docker/
vi /etc/docker/daemon.json

{
"data-root": "/home/docker"
}

systemctl start docker
docker info
df -h
rm -rf /var/lib/docker

References#

Contents