检查你是否正在使用Docker Machine:)

运行docker-machine env default就可以了。

因为根据文档:

Docker Machine is a tool that lets you install Docker Engine on virtual hosts, and manage the hosts with docker-machine commands. You can use Machine to create Docker hosts on your local Mac or Windows box, on your company network, in your data center, or on cloud providers like AWS or Digital Ocean. Using docker-machine commands, you can start, inspect, stop, and restart a managed host, upgrade the Docker client and daemon, and configure a Docker client to talk to your host. Point the Machine CLI at a running, managed host, and you can run docker commands directly on that host. For example, run docker-machine env default to point to a host called default, follow on-screen instructions to complete env setup, and run docker ps, docker run hello-world, and so forth.

https://docs.docker.com/machine/overview/

检查你是否正在使用Docker Machine:)

运行docker-machine env default就可以了。

因为根据文档:

Docker Machine is a tool that lets you install Docker Engine on virtual hosts, and manage the hosts with docker-machine commands. You can use Machine to create Docker hosts on your local Mac or Windows box, on your company network, in your data center, or on cloud providers like AWS or Digital Ocean. Using docker-machine commands, you can start, inspect, stop, and restart a managed host, upgrade the Docker client and daemon, and configure a Docker client to talk to your host. Point the Machine CLI at a running, managed host, and you can run docker commands directly on that host. For example, run docker-machine env default to point to a host called default, follow on-screen instructions to complete env setup, and run docker ps, docker run hello-world, and so forth.

https://docs.docker.com/machine/overview/

我在亚马逊AWS上运行时也遇到了同样的问题。

以下是我的尝试:

使用已经存在的AWS实例在本地设置docker-machine 使用的通用设置 它算是连接上了，但因为远程端口关闭了，所以失败了 在那之后，Docker守护进程拒绝启动，但是运行dockerd可以工作…

在远程机器上进行了如下测试:

service docker start # Also restart, no success
systemctl start docker # Also restart, no success
dockerd # Success

我删除了/var/lib/docker并卸载了所有内容，但重新安装后没有成功。不幸的是，我没有日志存储从失败，但docker。服务拒绝启动。

然而，最终解决我问题的基本上是:

sudo usermod -aG docker $(whoami)

尝试修改/etc/sysconfig中的Docker配置文件，Docker或Docker -network:

(…~ v1.17)

码头工人文件:

OPTIONS= -H fd://

或(v1.18):

docker-network文件:

DOCKER_NETWORK_OPTIONS= -H unix:///var/run/docker.sock

经过详细的调查，这个问题似乎每次在Mac OS X重新启动(或Docker虚拟机重新启动)后都会发生，这会阻止Docker客户端连接到Docker守护进程。

要解决这个问题，你可以:

A)使用官方安装程序(https://www.docker.com/products/docker-toolbox)重新安装Docker工具箱，或者简单地

B)依次执行以下命令:

# First make sure that the virtual machine is running
docker-machine start default

# Regenerate TLS connection certs, requires confirmation
docker-machine regenerate-certs default

# Finally, set env
eval "$(docker-machine env default)"

C)和(B)一样，你也可以复制粘贴下面这行来运行所有三个命令:

docker-machine start default; docker-machine regenerate-certs default; eval "$(docker-machine env default)"

如果你得到以下错误:

Error getting SSH command: Something went wrong running an SSH command!
command : cat /etc/os-release
err     : exit status 255
output  :

只要再次重新运行这三个命令，第二次就可以工作了。

如果你使用gitlab-ci / gitlab-runners，如果你没有访问/var/run/docker.sock的权限，你就会得到这个错误。

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock

解决问题:

sudo usermod -aG docker gitlab-runner

验证:

sudo -u gitlab-runner -H docker info

希望这能有所帮助。