Windows10 + WSL2 + Linux子系统 + Docker

Windows10 + WSL2 + Linux子系统 + Docker

首先参考安装 WSL | Microsoft Docs， 若是版本未达到要求参考​​​​​旧版 WSL 的手动安装步骤 | Microsoft Docs ，第6步执行完之后，执行以下 *** 作：

然后Ubuntu上安装Docker CE
1.先卸载旧版本的docker
  $ sudo apt-get remove docker docker-engine docker.io containerd runc
用资源库安装
2.Update the apt package index and install packages to allow apt to use a repository over HTTPS:
  $ sudo apt-get update
  $ sudo apt-get install
    apt-transport-https
    ca-certificates
    curl
    gnupg-agent
    software-properties-common
3.Add Docker’s official GPG key:
   $ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
   $ sudo apt-key fingerprint 0EBFCD88
   $ sudo add-apt-repository
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu
   $(lsb_release -cs)
   stable"
4.INSTALL DOCKER ENGINE
  $ sudo apt-get update
  $ sudo apt-get install docker-ce docker-ce-cli containerd.io
如果要安装特定版本的docker-ce，用如下步骤：
  $ apt-cache madison docker-ce
  $ sudo apt-get install docker-ce= docker-ce-cli= containerd.io
5.Verify that Docker Engine is installed correctly by running the hello-world image. （需要docker desktop处于启动状态）
  $ sudo docker run hello-world

启动Docker Desktop发生错误System.IO.IOException:
The process cannot access the file 'C:UsersxxxxAppDataLocalDockervm-configconfig.iso' because it is being used by another process.
解决办法：进Hyper-V Manager，关闭DockerDesktopVM

授于当前用户以root权限运行Docker CLI
  $ sudo usermod -aG docker $USER
安装Docker Compose
# Install Python and PIP.
  $ sudo apt-get install -y python3 python3-pip
# Install Docker Compose into your user's home directory.
  $ pip3 install --user docker-compose
连接Docker daemon
最关键的一行命令，打开Bash：
  $ echo "export DOCKER_HOST=tcp://localhost:2375" >> ~/.bashrc && source ~/.bashrc
验证Docker启动成功：（先执行unset DOCKER_HOST）
  $ docker info
  $ docker-compose --version
  $ docker run hello-world

如果docker info失败，报如下错误：
ERROR: Cannot connect to the Docker daemon at tcp://localhost:2375. Is the docker daemon running?
执行unset DOCKER_HOST，然后再跑docker info