所有版本的安装文档在https://docs.docker.com/install/都可以找到。
以在ubuntu上安装docker为例：https://docs.docker.com/install/linux/docker-ce/ubuntu/，只需要执行两步即可安装成功：
$ curl -fsSL https://get.docker.com -o get-docker.sh
$ sudo sh get-docker.sh
如果想要让非root用户也能使用root，需要将该用户加到docker组：
$ sudo usermod -aG docker USER_NAME
Docker daemon的配置文件为/etc/docker/daemon.json，修改它即可。
Docker daemon默认使用brdige docker0，它创建的bridge模式的container将会加入到该bridge上。如果想用别的bridge，增加下面选项即可。
{
"bridge": "YOUR-BRIDGE" // e.g. "brdige": "192.168.1.1/24"
}
fixed-cidr必须与bridge在同一个网段（因此要求bridge必须要有ip，否则配置的bridge将不起作用，docker依旧将使用bridge docker0）。
--fixed-cidr=CIDR and --fixed-cidr-v6=CIDRv6: restrict the IP range from the docker0 subnet, using standard CIDR notation. For example: 172.16.1.0/28. This range must be an IPv4 range for fixed IPs, and must be a subset of the bridge IP range (docker0 or set using --bridge or the bip key in the daemon.json file). For example, with --fixed-cidr=192.168.1.0/25, IPs for your containers will be chosen from the first half of addresses included in the 192.168.1.0/24 subnet.
{
"fixed-cidr": "XXXXX/XX" // e.g. "fixed-cidr": "192.168.1.5/25"
}
- Configure and troubleshoot the Docker daemon: https://docs.docker.com/config/daemon/
- Build your own bridge: https://docs.docker.com/v17.09/engine/userguide/networking/default_network/build-bridges/
- Customize the docker0 bridge: https://docs.docker.com/v17.09/engine/userguide/networking/default_network/custom-docker0/