Ubuntu18.04安装docker

Ubuntu18.04系统中 Docker 安装与配置指南

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本文档详细介绍了如何在Ubuntu18.04上安装Docker和docker-machine，并通过添加sources.list、安装VirtualBox以及配置Docker源来优化环境。成功安装后，建议重启并调整daemon.json文件以完善设置。

docker环境配置(ubuntu)

安装docker
```
$ sudo snap install docker
```

安装docker-machine

$ base=https://github.com/docker/machine/releases/download/v0.16.0 &&
  curl -L $base/docker-machine-$(uname -s)-$(uname -m) >/tmp/docker-machine &&
  sudo install /tmp/docker-machine /usr/local/bin/docker-machine

检查是否成功：

$ docker-machine version
docker-machine version 0.16.0, build 9371605

安装virtual box来作为docker-machine的driver：

编辑/etc/apt/sources.list添加这行内容："deb https://download.virtualbox.org/virtualbox/debian bionic contrib"
```
$ wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add - 
$ sudo apt-get update 
$ sudo apt-get install virtualbox-5.2
```

创建一个docker-machine：

  $ docker-machine create --driver virtualbox default
  Running pre-create checks...
  Creating machine...
  (staging) Copying /Users/ripley/.docker/machine/cache/boot2docker.iso to /Users/ripley/.docker/machine/machines/default/boot2docker.iso...
  (staging) Creating VirtualBox VM...
  (staging) Creating SSH key...
  (staging) Starting the VM...
  (staging) Waiting for an IP...
  Waiting for machine to be running, this may take a few minutes...
  Machine is running, waiting for SSH to be available...
  Detecting operating system of created instance...
  Detecting the provisioner...
  Provisioning with boot2docker...
  Copying certs to the local machine directory...
  Copying certs to the remote machine...
  Setting Docker configuration on the remote daemon...
  Checking connection to Docker...
  Docker is up and running!
  To see how to connect Docker to this machine, run: docker-machine env default

查看创建是否成功：

$ docker-machine ls
NAME      ACTIVE   DRIVER       STATE     URL   SWARM   DOCKER    ERRORS
default   -        virtualbox   Stopped                 Unknown

创建好之后最好重启一下

修改docker的源：

修改或新增/etc/docker/daemon.json

# vi /etc/docker/daemon.json

{

"registry-mirrors": ["https://registry.docker-cn.com"]

}

$ systemctl restart docker.service