Linux下Docker安装_sudo yum install last metadata expiration-优快云博客

本文链接：https://blog.youkuaiyun.com/fengzhexiabi/article/details/106819197

本文详细介绍了在Linux环境下安装Docker的步骤，包括更新系统、安装依赖、设置镜像源、安装Docker-CE及解决安装过程中可能遇到的问题。同时，提供了修改Docker默认存放路径的方法和镜像加速配置。

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Linux下Docker安装

步骤1：yum更新

sudo yum update

步骤2：安装依赖环境

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

步骤三：设置阿里云镜像源

sudo yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

步骤四：安装 Docker-CE

sudo yum install docker-ce

报错插曲:

[root@test-linux ~]# sudo yum install  docker-ce
Last metadata expiration check: 0:04:18 ago on Wed 17 Jun 2020 08:56:46 PM CST.
Error: 
 Problem: package docker-ce-3:19.03.11-3.el7.x86_64 requires containerd.io >= 1.2.2-3, but none of the providers can be installed
  - cannot install the best candidate for the job
  - package containerd.io-1.2.10-3.2.el7.x86_64 is excluded
  - package containerd.io-1.2.13-3.1.el7.x86_64 is excluded
  - package containerd.io-1.2.13-3.2.el7.x86_64 is excluded
  - package containerd.io-1.2.2-3.3.el7.x86_64 is excluded
  - package containerd.io-1.2.2-3.el7.x86_64 is excluded
  - package containerd.io-1.2.4-3.1.el7.x86_64 is excluded
  - package containerd.io-1.2.5-3.1.el7.x86_64 is excluded
  - package containerd.io-1.2.6-3.3.el7.x86_64 is excluded

解决方法：安装新版containerd.io

sudo dnf install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm

步骤五：继续安装 Docker-CE

sudo yum install docker-ce

步骤六：设置开机自启动docker

# 开机自启
sudo systemctl enable docker 
# 启动docker服务  
sudo systemctl start docker

步骤六：镜像加速配置

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://vl8aqvzg.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

步骤七：修改Docker默认存放路径

#修改docker配置文件/etc/docker/daemon.json，添加或修改 "data-root" 选项，以指向新的存储路径，如下
{
	"data-root": "/platform/docker"
}

步骤八：重新enable一下docker 服务、重新进行软连接以及进行一次daemon-reload

systemctl disable docker
systemctl enable docker
systemctl daemon-reload
systemctl start docker

步骤九：验证新的存放路径

docker info
#可以看到Docker Root Dir已变为新目录
#eg:
#Docker Root Dir: /platform/docker