Ubuntu Raspberry Pi 3 上的核心 16 无法连接到 Docker 守护进程

Question

设置新 Ubuntu Core 16 raspberry Pi 机器后。使用来自 Ubuntu Core web page.

的图像

并使用 snap 在其上安装 Docker：

snap install docker

我无法使用 docker，因为出现错误：

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

Docker 服务状态不活跃（死）：

sudo systemctl status snap.docker.dockerd.service

snap.docker.dockerd.service - Service for snap application docker.dockerd
Loaded: loaded (/etc/systemd/system/snap.docker.dockerd.service; enabled; vendor preset: enabled)
Active: inactive (dead) (Result: exit-code) since Wed 2017-05-03 10:30:55 UTC; 30min ago
Process: 1975 ExecStart=/usr/bin/snap run docker.dockerd (code=exited, status=126)
Main PID: 1975 (code=exited, status=126)

May 03 10:30:54 localhost.localdomain systemd[1]: snap.docker.dockerd.service: Unit entered failed state.
May 03 10:30:54 localhost.localdomain systemd[1]: snap.docker.dockerd.service: Failed with result 'exit-code'.
May 03 10:30:55 localhost.localdomain systemd[1]: snap.docker.dockerd.service: Service hold-off time over, scheduling restart.
May 03 10:30:55 localhost.localdomain systemd[1]: Stopped Service for snap application docker.dockerd.
May 03 10:30:55 localhost.localdomain systemd[1]: snap.docker.dockerd.service: Start request repeated too quickly.
May 03 10:30:55 localhost.localdomain systemd[1]: Failed to start Service for snap application docker.dockerd.

正在重新启动 docker 服务：

sudo systemctl stop snap.docker.dockerd.service
sudo systemctl start snap.docker.dockerd.service

没有帮助。

Docker 版本输出：

Client:
Version:      1.13.1
API version:  1.26
Go version:   go1.7.5
Git commit:   -snap-a2d8d8c
Built:        Fri Apr 21 08:56:55 2017
OS/Arch:      linux/arm
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

docker 的快照连接：

snap interfaces |grep docker

:docker-support           docker:privileged,docker:support
:firewall-control         docker
:network                  docker
:network-bind             docker
docker:docker-daemon      docker:docker-cli
-                         docker:account-control
-                         docker:home

是否需要任何其他步骤才能正确启动 docker 守护程序？

UPD：Docker 服务日志

 sudo journalctl -u snap.docker.dockerd.service -f

 -- Logs begin at Wed 2017-05-03 15:56:02 UTC. --
 May 03 16:12:58 localhost.localdomain systemd[1]: Stopped Service for snap application docker.dockerd.
 May 03 16:12:58 localhost.localdomain systemd[1]: Started Service for snap application docker.dockerd.
 May 03 16:12:59 localhost.localdomain snap[1697]: /snap/docker/91/bin/dockerd-wrapper: 23: /snap/docker/91/bin/dockerd-wrapper: useradd: Permission denied
 May 03 16:12:59 localhost.localdomain systemd[1]: snap.docker.dockerd.service: Main process exited, code=exited, status=126/n/a
 May 03 16:12:59 localhost.localdomain systemd[1]: snap.docker.dockerd.service: Unit entered failed state.
 May 03 16:12:59 localhost.localdomain systemd[1]: snap.docker.dockerd.service: Failed with result 'exit-code'.
 May 03 16:12:59 localhost.localdomain systemd[1]: snap.docker.dockerd.service: Service hold-off time over, scheduling restart.
 May 03 16:12:59 localhost.localdomain systemd[1]: Stopped Service for snap application docker.dockerd.
 May 03 16:12:59 localhost.localdomain systemd[1]: snap.docker.dockerd.service: Start request repeated too quickly.
 May 03 16:12:59 localhost.localdomain systemd[1]: Failed to start Service for snap application docker.dockerd.

Answer 1

我遇到了和你一样的问题，但是在执行 this post 中给出的命令后它又恢复了。

这些是命令：

$  sudo snap connect docker:account-control :account-control
$  sudo snap connect docker:home :home
$  snap disable docker && snap enable docker
$  newgrp docker-snap

Ubuntu Raspberry Pi 3 上的核心 16 无法连接到 Docker 守护进程

Ubuntu Core 16 on Raspberry Pi 3 cannot connect to Docker daemon

ubuntu

docker

raspberry-pi3

snapcraft