Docker 启动失败

Docker 启动失败

今天我遇到了一个问题,docker 停止了,我无法启动它

 systemctl status docker

● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Tue 2020-01-28 09:59:03 +0330; 1min 51s ago
     Docs: https://docs.docker.com
  Process: 2327 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock (code=exited, status=205/LIMITS)
 Main PID: 2327 (code=exited, status=205/LIMITS)

Jan 28 09:59:03 example.com systemd[1]: Starting Docker Application Container Engine...
Jan 28 09:59:03 example.com systemd[1]: docker.service: main process exited, code=exited, status=205/LIMITS
Jan 28 09:59:03 example.com systemd[1]: Stopped Docker Application Container Engine.
Jan 28 09:59:03 example.com systemd[1]: Unit docker.service entered failed state.
Jan 28 09:59:03 example.com systemd[1]: docker.service failed.

我看到我有status=205/LIMITS我记得三天前我改变了ulimit配置

# /etc/security/limits.d/custom.conf

root soft nofile 1000000
root hard nofile 1000000
* soft nofile 1000000
* hard nofile 1000000
# /etc/sysctl.conf

fs.file-max = 1000000
fs.nr_open = 1000000

我将 fd 增加到 100 万,撤消更改后,docker 成功启动

这里到底有什么问题?

答案1

status=205/LIMITS意味着其中一个限制命中LimitCPU=, LimitFSIZE=, LimitDATA=, LimitSTACK=, LimitCORE=, LimitRSS=, LimitNOFILE=, LimitAS=, LimitNPROC=, LimitMEMLOCK=, LimitLOCKS=, LimitSIGPENDING=, LimitMSGQUEUE=, LimitNICE=, LimitRTPRIO=, LimitRTTIME=

我不确定你的操作系统版本,但给出一个 Ubuntu 16 的示例,/etc/systemd/system/docker.service.d/customexec.conf如果不存在以下内容,请创建此文件。

[Service]
LimitNOFILE=1000000

重新加载systemctl daemon-reload

docker 软件包设置的限制高于我们的新限制,因此进程无法启动。如果上述选项不适合您,您可以尝试以下方法。

sysctl -w fs.nr_open=1048576

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