Ubuntu20.04安装docker

安装

1. 卸载旧版docker
sudo apt-get remove docker docker-engine docker.io containerd runc
sudo apt-get purge docker-ce docker-ce-cli containerd.io docker-compose-plugin
sudo rm -rf /var/lib/docker /etc/docker

2. 安装必要的依赖项
sudo apt-get update
sudo apt-get install -y apt-transport-https ca-certificates curl gnupg lsb-release

3. 添加阿里云的 Docker GPG 密钥
curl -fsSL https://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

4. 设置阿里云的 Docker 仓库
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] \
https://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

5. 更新 APT 包索引并安装 Docker
sudo apt-get update
sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin

配置源

https://cloud.tencent.com/developer/article/2485043

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<EOF
{
    "registry-mirrors": [
        "https://docker.1ms.run",
        "https://docker.xuanyuan.me"
    ]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

‍

改权限

问题描述：执行docker ps -a ，报错信息如下：

permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: 
Get "http://%2Fvar%2Frun%2Fdocker.sock/v1.49/containers/json?all=1": dial unix /var/run/docker.sock: connect: permission denied

解决：

添加docker用户组：sudo groupadd docker
将登陆用户加入到docker用户组中：sudo gpasswd -a $USER docker
更新用户组：newgrp docker
测试：docker images

‍

‍

‍