CentOS7安装docker 启动不了解决篇 "Cannot connect to the Docker daemon at unix:///var/run/docker.sock. ..."问题

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本文记录了使用yum install docker安装Docker后启动失败的问题。博主尝试关闭防火墙、关闭selinux、重装系统等常见方法均未解决。最后给出两种成功安装并启动的方法，一是通过修改yum源安装docker - engine，二是使用curl命令安装。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

[root@test ~]# yum update

[root@test ~]# yum install docker

[root@test ~]# service docker start

Redirecting to /bin/systemctl start docker.service

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

[root@test ~]# systemctl status docker.service

● docker.service - Docker Application Container Engine

Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)

Active: inactive (dead) (Result: exit-code) since 四 2016-03-10 13:01:21 CST; 7s ago

Docs: http://docs.docker.com

Process: 29939 ExecStart=/usr/bin/docker daemon $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_NETWORK_OPTIONS $ADD_REGISTRY $BLOCK_REGISTRY $INSECURE_REGISTRY (code=exited, status=2)

Main PID: 29939 (code=exited, status=2)

CGroup: /system.slice/docker.service

└─29970 mkfs.ext4 -E nodiscard,lazy_itable_init=0,lazy_journal_ini...

3月 10 13:01:20 test.test.com systemd[1]: Failed to start Docker Applic....

3月 10 13:01:20 test.test.com systemd[1]: Unit docker.service entered f....

3月 10 13:01:20 test.test.com systemd[1]: docker.service failed.

3月 10 13:01:21 test.test.com systemd[1]: docker.service holdoff time o....

Hint: Some lines were ellipsized, use -l to show in full.

[root@test ~]#

使用yum install docker安装完后启动不了

[root@apptest ~]# service docker start

Redirecting to /bin/systemctl start docker.service

一直停留在以上步骤

可以使用以下命令来安装，即可成功。

一个问题让我折腾了两天，试过关闭防火墙，关闭selinux，重装系统，等等网上能查到的方法都解决不了。

如果大家解决了，回复感谢下我吧。

[root@apptest ~]# yum remove docker

[root@apptest ~]# yum remove docker-selinux

[root@test yum.repos.d]# vi /etc/yum.repos.d/docker.repo

[dockerrepo]

name=Docker Repository

baseurl=https://yum.dockerproject.org/repo/main/centos/$releasever/

enabled=1

gpgcheck=1

gpgkey=https://yum.dockerproject.org/gpg

[root@test yum.repos.d]# yum install docker-engine

已安装:

docker-engine.x86_64 0:1.10.2-1.el7.centos

作为依赖被安装:

docker-engine-selinux.noarch 0:1.10.2-1.el7.centos

[root@apptest ~]# service docker start

Redirecting to /bin/systemctl start docker.service

[root@apptest ~]# docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

[root@test yum.repos.d]# docker version

Client:

Version: 1.10.2

API version: 1.22

Go version: go1.5.3

Git commit: c3959b1

Built: Mon Feb 22 16:16:33 2016

OS/Arch: linux/amd64

Server:

Version: 1.10.2

API version: 1.22

Go version: go1.5.3

Git commit: c3959b1

Built: Mon Feb 22 16:16:33 2016

OS/Arch: linux/amd64

[root@test yum.repos.d]#

或者使用以下方法

[root@apptest ~]# curl -fsSL https://get.docker.com/ | sh

+ sh -c 'sleep 3; yum -y -q install docker-engine'

警告：/var/cache/yum/x86_64/7/docker-main-repo/packages/docker-engine-selinux-1.10.2-1.el7.centos.noarch.rpm: 头V4 RSA/SHA512 Signature, 密钥 ID 2c52609d: NOKEY

docker-engine-selinux-1.10.2-1.el7.centos.noarch.rpm 的公钥尚未安装

导入 GPG key 0x2C52609D:

用户ID : "Docker Release Tool (releasedocker) <docker@docker.com>"

指纹 : 5811 8e89 f3a9 1289 7c07 0adb f762 2157 2c52 609d

来自 : https://yum.dockerproject.org/gpg

setsebool: SELinux is disabled.

+ sh -c 'docker version'

Client:

Version: 1.10.2

API version: 1.22

Go version: go1.5.3

Git commit: c3959b1