手把手ubuntu18.04安装docker步骤

01.业务背景

使用ubuntu18.04来安装docker.

02.安装什么

安装docker-engine和安装docker-compose.

03.官网地址

Docker的官网 :https://www.docker.com
ubuntu18.04安装docker的参考地址: https://docs.docker.com/engine/install/ubuntu/
参考官网文章:Install Docker Engine on Ubuntu
注意:我们无须安装docker-desktop.

04.安装docker

在ubuntu18.04中安装docker需要以下步骤.

步骤01.清理旧版

如果以前安装过docker,可以将旧版本进行卸载.执行命令如下:
卸载命令1.1:
sudo apt-get remove docker docker-engine docker.io containerd runc
卸载命令1.2:
sudo apt-get purge docker-ce docker-ce-cli containerd.io docker-compose-plugin
卸载命令1.3:
sudo rm -rf /var/lib/docker
sudo rm -rf /var/lib/containerd

步骤02.创建仓库

如果你是第一次安装docker,那么需要安装docker仓库.
Update the apt package index and install packages to allow apt to use a repository over HTTPS:

执行命令2.1:
sudo apt-get update
执行命令2.2:
sudo apt-get install ca-certificates curl gnupg lsb-release

Add Docker's official GPG key:
执行命令2.3:sudo mkdir -p /etc/apt/keyrings
执行命令2.4:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

Use the following command to set up the repository:
执行命令2.5:

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

需要确认不同的操作系统版本号,配置的数据根本不同.
使用ubuntu18.04,因此配置是bionic.
执行命令2.6:
sudo gedit /etc/apt/sources.list.d/docker.list
修改内容如下:

deb [arch=amd64 signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu **bionic** stable