在daemon.json中配置hosts后无法启动docker

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问题:在daemon.json中配置hosts后无法启动docker

  我正在尝试使用配置文件 /etc/docker/daemon.json:

{
  "debug": true,
  "hosts": ["tcp://0.0.0.0:1234", "unix:///var/run/docker.sock"],
  "dns"  : ["8.8.8.8","8.8.4.4"]
}

  当我尝试重新启动 docker .. 它失败了:

#service docker restart
Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.

  观看 systemctl 状态 docker.service:

Starting Docker Application Container Engine...
docker-slave-ubuntu-build dockerd[24806]: unable to configure the Docker daemon with file /etc/docker/daemon.json: 
the following directives are specified both as a flag and in the configuration file: 
hosts: (from flag: [fd://], from file: [tcp://0.0.0.0:4243 unix:///var/run/docker.sock])

解答

  看起来这是从命令行和配置文件合并配置的问题。默认的 systemd 单元文件指定-H fd://,它与您的tcp://0.0.0.0:1234和unix:///var/run/docker.sock冲突。
  关于这个主题有许多GitHub问题:
. https://github.com/moby/moby/issues/22339
. https://github.com/moby/moby/issues/21559
. https://github.com/moby/moby/issues/25471
. https://github.com/moby/moby/pull/27473

  他们似乎不认为这是一个错误。但这绝对是一个烦恼。一种解决方法是复制默认单元文件并从中删除-H fd://:

sudo cp /lib/systemd/system/docker.service /etc/systemd/system/
sudo sed -i 's/\ -H\ fd:\/\///g' /etc/systemd/system/docker.service
sudo systemctl daemon-reload
sudo service docker restart