docker engine

说明

环境：Ubuntu 20.04，
- uname -a
- lsb_release -a
目前官方支持的Ubuntu版本如下
版本不一时，优先参考官网，官方安装介绍：Install Docker Engine on Ubuntu

现有sources.list，如果速度过慢，可优先更换镜像源

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://cn.archive.ubuntu.com/ubuntu focal main restricted
# deb-src http://cn.archive.ubuntu.com/ubuntu focal main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://cn.archive.ubuntu.com/ubuntu focal-updates main restricted
# deb-src http://cn.archive.ubuntu.com/ubuntu focal-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://cn.archive.ubuntu.com/ubuntu focal universe
# deb-src http://cn.archive.ubuntu.com/ubuntu focal universe
deb http://cn.archive.ubuntu.com/ubuntu focal-updates universe
# deb-src http://cn.archive.ubuntu.com/ubuntu focal-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://cn.archive.ubuntu.com/ubuntu focal multiverse
# deb-src http://cn.archive.ubuntu.com/ubuntu focal multiverse
deb http://cn.archive.ubuntu.com/ubuntu focal-updates multiverse
# deb-src http://cn.archive.ubuntu.com/ubuntu focal-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://cn.archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
# deb-src http://cn.archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu focal partner
# deb-src http://archive.canonical.com/ubuntu focal partner

deb http://cn.archive.ubuntu.com/ubuntu focal-security main restricted
# deb-src http://cn.archive.ubuntu.com/ubuntu focal-security main restricted
deb http://cn.archive.ubuntu.com/ubuntu focal-security universe
# deb-src http://cn.archive.ubuntu.com/ubuntu focal-security universe
deb http://cn.archive.ubuntu.com/ubuntu focal-security multiverse
# deb-src http://cn.archive.ubuntu.com/ubuntu focal-security multiverse

步骤

卸载旧版本

由于是新系统，没安装过，留空

设置docker官方仓库

更新apt包索引及允许使用HTTPS使用存储库

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sudo apt-get update
sudo apt-get install ca-certificates curl gnupg lsb-release
# 截图展示了已经安装好的情形

添加docker官方秘钥

1 2	sudo mkdir -m 0755 -p /etc/apt/keyrings curl -fsSL https://download.docker.com/linux/ubuntu/gpg \| sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

设置官方存储库

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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

正式安装

再次更新apt包索引：sudo apt-get update

安装Docker Engine, containerd和Docker Compose

1 2	# 最新版本命令，如安装指定版本，查看官网 sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin