https://docs.docker.com/install/linux/docker-ce/ubuntu/
- 如果有旧版本,你需要卸载它。
Ubuntu旧版本被称为docker
,docker.io
或docker-engine
。可以查看是否存在/var/lib/docker/目录来确定自己是否存在旧版本。执行下面命令卸载它:
sudo apt-get remove docker docker-engine docker.io containerd runc
- 更新apt
sudo apt-get update
- 添加证书安装包以允许apt通过HTTPS
sudo apt-get install \
apt-transport-https \
ca-certificates \
curl \
gnupg-agent \
software-properties-common
- 添加Docker的官方GPG密钥
显示OK,表示添加成功.
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88
通过搜索指纹的最后8个字符,验证您现在拥有带指纹的密钥 。输入指令:
sudo apt-key fingerprint 0EBFCD88
- 添加稳定仓库
sudo add-apt-repository \
"deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"
- 更新
apt
包索引
这一步不能够省略,我们需要再次把软件更新到最新,否则下一步有可能会报错。
sudo apt-get update
- 安装最新版本的Docker CE和containerd
sudo apt-get install docker-ce docker-ce-cli containerd.io
要安装特定版本的Docker CE,可以使用以下指令例举出所有的版本,并使用第二列中的版本字符串安装特定版本。
apt-cache madison docker-ce
docker-ce | 5:18.09.1~3-0~ubuntu-xenial | https://download.docker.com/linux/ubuntu xenial/stable amd64 Packages
docker-ce | 5:18.09.0~3-0~ubuntu-xenial | https://download.docker.com/linux/ubuntu xenial/stable amd64 Packages
docker-ce | 18.06.1~ce~3-0~ubuntu | https://download.docker.com/linux/ubuntu xenial/stable amd64 Packages
docker-ce | 18.06.0~ce~3-0~ubuntu | https://download.docker.com/linux/ubuntu xenial/stable amd64 Packages
...
安装特定版本如下:
sudo apt-get install docker-ce=<VERSION_STRING> docker-ce-cli=<VERSION_STRING> containerd.io
- 测试安装成功
通过运行hello-world
映像验证。
sudo docker run hello-world
效果如下:
Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
(amd64)
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
https://hub.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/get-started/
- 添加当前用户到 docker 用户组
如果你想执行docker命令时,不必每次都在前面加上sudo,就执行下面命令(这条命令最好切换到root用户下):
sudo usermod -aG docker username
username是你登陆的用户名。