Ubuntu 18.04中安装Docker

2019/10/1 by Qin Zhiqiang in 云原生 Docker

Docker是云原生的基石，服务软件都可以包含到Docker容器中，服务软件之间相互隔离。云原生时代，几乎到了“没有服务可以脱离Docker容器”。

服务器使用Ubuntu Server 18.04，后续安装其他软件与维护都比较方便。

sudo apt-get update
sudo apt-get install docker.io -y
sudo systemctl start docker
sudo systemctl enable docker

修改 Docker driver，符合K8S等使用场景：

sudo nano /etc/docker/daemon.json

{
    "exec-opts": ["native.cgroupdriver=systemd"],
    "log-driver": "json-file",
    "log-opts": {
        "max-size": "100m"
    },
    "storage-driver": "overlay2",
    "storage-opts": [
        "overlay2.override_kernel_check=true"
    ]
}

sudo systemctl daemon-reload
sudo systemctl restart docker

运行Hello World：

$ sudo docker run --rm hello-world
...
Hello from Docker!
This message shows that your installation appears to be working correctly.
...

添加当前用户到Docker用户组，避免每次执行需要sudo：

sudo usermod -aG docker $USER

# logout, then login again
dock images