docker - 在 CentOS7 中无法启动 docker daemon

Question

执行systemctl start docker后，得到:

Failed to start docker.service: Unit not found.

这是 systemctl status docker -l 的输出:

[root@HP11012078 init.d]# systemctl status docker -l
● docker.service - Docker Application Container Engine
   Loaded: loaded (/etc/systemd/system/docker.service; disabled; vendor preset: disabled)
   Active: inactive (dead)
     Docs: https://docs.docker.com

Feb 09 17:04:35 HP11012078 docker[28152]: time="2017-02-09T17:04:35.104333869+08:00" level=warning msg="container 58a5c6ba6710240bb5b1fd79e4600b547cf4c882eb2ca85e15c59c1404106877 restart canceled"
Feb 09 17:04:35 HP11012078 docker[28152]: time="2017-02-09T17:04:35.113914527+08:00" level=warning msg="container d320ba5f02cdd8567893acfc62b6673a24b6c8a43ccb52342bb3470ff420230d restart canceled"
Feb 09 17:04:35 HP11012078 docker[28152]: time="2017-02-09T17:04:35.122613873+08:00" level=warning msg="container 4030daadb9481a1b96b7a5c614c8910a601f83f2dced8340f4ea4c3583e7e844 restart canceled"
Feb 09 17:04:45 HP11012078 docker[28152]: time="2017-02-09T17:04:45.002120051+08:00" level=info msg="Container c13f11ce792c477d9b663c6fdbcfe9694663f7843a40540c58922893f4b41247 failed to exit within 10 seconds of signal 15 - using the force"
Feb 09 17:04:45 HP11012078 docker[28152]: time="2017-02-09T17:04:45.002120421+08:00" level=info msg="Container 0457d15d8b0bc83458dd3eea0c0b84699465da9746defc2429db89e426dbfa75 failed to exit within 10 seconds of signal 15 - using the force"
Feb 09 17:04:45 HP11012078 docker[28152]: time="2017-02-09T17:04:45.002870012+08:00" level=warning msg="Cannot kill container c13f11ce792c477d9b663c6fdbcfe9694663f7843a40540c58922893f4b41247: rpc error: code = 2 desc = \"containerd: container not found\""
Feb 09 17:04:45 HP11012078 docker[28152]: time="2017-02-09T17:04:45.049505738+08:00" level=warning msg="container 0457d15d8b0bc83458dd3eea0c0b84699465da9746defc2429db89e426dbfa75 restart canceled"
Feb 09 17:04:45 HP11012078 docker[28152]: time="2017-02-09T17:04:45.173034929+08:00" level=error msg="Force shutdown daemon"
Feb 09 17:04:45 HP11012078 docker[28152]: time="2017-02-09T17:04:45+08:00" level=info msg="stopping containerd after receiving terminated"
Feb 09 17:04:46 HP11012078 systemd[1]: Stopped Docker Application Container Engine.

但我可以使用 docker daemon 命令启动 docker。请帮忙

Answer 1

要解决此问题，必须创建一个丢失的文件:/usr/lib/systemd/system/docker.socket

[Unit]
Description=Docker Socket for the API
PartOf=docker.service

[Socket]
ListenStream=/var/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker

[Install]
WantedBy=sockets.target

然后运行:

systemctl daemon-reload
systemctl start docker.socket
systemctl start docker

然后 Docker 将启动。看起来安装删除了该文件并且没有替换它。