网友阿里云装的最新版docker起不来了，还是被coding给解决了-CFANZ编程社区

网友啊，看到我之前写过的一篇文章运维之docker启动失败Failed to start Docker Application Container Engine. ，说不行，仍然解决不了问题，于是乎我又写了一篇文章安利最全docker加速器配置，但是网友说还是不行
于是呐，coding就远程给网友看了下，当然解决了问题
以上就是本文创作的动力！

下面就是coding一步一步解决问题的记录全过程

一、现场情况

0. 配置信息

阿里云主机
OS：CentOS7.9.2009
Architecture：x86_64
CPU(s)：2
Memory：4G
Disk：40G

1.故障截图

网友阿里云装的最新版docker起不来了，还是被coding给解决了_git

2.故障描述

（1）启动docker服务失败

（2）docker info 信息中 Server 报错：Is the docker daemon running?

二、排查过程

首先，确定云主机环境

vi os.sh

#!/bin/bash

uname -a && echo '' && \
cat /etc/centos-release && echo '' && \
hostnamectl && echo '' && \
lscpu && echo '' && \
free -h && echo '' && \
lsblk && echo '' && \
df -hT

chmod u+x os.sh./os.sh

其次，确定已安装docker版本

docker version

docker info

rpm -qa | grep docker

第三，查看几个重要docker配置文件

加速器：

/etc/docker/daemon.json

docker服务：

/etc/systemd/system/docker.service

查看sock是否存在

/run/containerd/containerd.sock

/var/run/docker.sock

三、解决方案

考虑：修改 docker 配置文件/etc/docker/daemon.json此路不通
考虑：卸载后重装
此路亦不通
考虑：终极解决方案

定位问题根源

网友阿里云装的最新版docker起不来了，还是被coding给解决了_运维_02

只需要把它干掉即可解决问题

罪恶根源

--registry-mirror=<mirror.aliyuncs.com>

干的话，直接编辑 /usr/lib/systemd/system/docker.service文件，去掉上面那行即可

之后要进行的操作是

重新加载daemon

systemctl daemon-reload

重启docker服务

systemctl restart docker

四、复现一下

1、默认安装docker最新版

yum -y install docker

2、修改docker.service文件

在 ExecStart=/usr/bin/dockerd和 -H fd:// --containerd=/run/containerd/containerd.sock之间添加 --registry-mirror=<mirror.aliyuncs.com>

vim /usr/lib/systemd/system/docker.service

[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd --registry-mirror=<mirror.aliyuncs.com> -H fd:// --containerd=/run/containerd/containerd.sock
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always

3、重新加载daemon

systemctl daemon-reload

4、重启docker服务

systemctl restart docker

4、查看docker服务、版本、info，必现报错

所以解决方案是：干掉问题根源，干掉 --registry-mirror=<mirror.aliyuncs.com>

然后重启docker服务，systemctl restart docker，恢复正常！

[root@y1 ~]# vim /usr/lib/systemd/system/docker.service
[root@y1 ~]#
[root@y1 ~]# systemctl restart docker
Warning: docker.service changed on disk. Run 'systemctl daemon-reload' to reload units.
Job for docker.service failed because start of the service was attempted too often. See "systemctl status docker.service" and "journalctl -xe" for details.
To force a start use "systemctl reset-failed docker.service" followed by "systemctl start docker.service" again.
[root@y1 ~]#
[root@y1 ~]#
[root@y1 ~]# systemctl daemon-reload
[root@y1 ~]#
[root@y1 ~]# systemctl restart docker
[root@y1 ~]#
[root@y1 ~]# systemctl status docker
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
   Active: active (running) since 日 2021-05-16 02:51:49 CST; 14s ago
     Docs: https://docs.docker.com
 Main PID: 94682 (dockerd)
   Memory: 46.8M
   CGroup: /system.slice/docker.service
           └─94682 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

5月 16 02:51:49 y1 dockerd[94682]: time="2021-05-16T02:51:49.156123788+08:00" level=info msg="[graphdriver] using prior storage driver: devicemapper"
5月 16 02:51:49 y1 dockerd[94682]: time="2021-05-16T02:51:49.156232393+08:00" level=warning msg="[graphdriver] WARNING: the devicemapper storage-driver is deprecated, an...ure release"
5月 16 02:51:49 y1 dockerd[94682]: time="2021-05-16T02:51:49.167332132+08:00" level=warning msg="Unable to find pids cgroup in mounts"
5月 16 02:51:49 y1 dockerd[94682]: time="2021-05-16T02:51:49.167906494+08:00" level=info msg="Loading containers: start."
5月 16 02:51:49 y1 dockerd[94682]: time="2021-05-16T02:51:49.462966417+08:00" level=info msg="Default bridge (docker0) is assigned with an IP address 172.17.0.0/16. Daem... IP address"
5月 16 02:51:49 y1 dockerd[94682]: time="2021-05-16T02:51:49.562746930+08:00" level=info msg="Loading containers: done."
5月 16 02:51:49 y1 dockerd[94682]: time="2021-05-16T02:51:49.652924659+08:00" level=info msg="Docker daemon" commit=8728dd2 graphdriver(s)=devicemapper version=20.10.6
5月 16 02:51:49 y1 dockerd[94682]: time="2021-05-16T02:51:49.653295544+08:00" level=info msg="Daemon has completed initialization"
5月 16 02:51:49 y1 systemd[1]: Started Docker Application Container Engine.
5月 16 02:51:49 y1 dockerd[94682]: time="2021-05-16T02:51:49.693700429+08:00" level=info msg="API listen on /var/run/docker.sock"
Hint: Some lines were ellipsized, use -l to show in full.
[root@y1 ~]#
[root@y1 ~]# docker version
Client: Docker Engine - Community
 Version:           20.10.6
 API version:       1.41
 Go version:        go1.13.15
 Git commit:        370c289
 Built:             Fri Apr  9 22:45:33 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.6
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       8728dd2
  Built:            Fri Apr  9 22:43:57 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.4
  GitCommit:        05f951a3781f4f2c1911b05e61c160e9c30eaa8e
 runc:
  Version:          1.0.0-rc93
  GitCommit:        12644e614e25b05da6fd08a38ffa0cfe1903fdec
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0
[root@y1 ~]#