Ubuntu 18.04安装docker

安装日志：

$ sudo apt install docker.io
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  bridge-utils cgroupfs-mount containerd git git-man liberror-perl pigz runc ubuntu-fan
Suggested packages:
  aufs-tools btrfs-progs debootstrap docker-doc rinse zfs-fuse | zfsutils git-daemon-run | git-daemon-sysvinit git-doc git-el git-email git-gui gitk gitweb git-cvs git-mediawiki git-svn
The following NEW packages will be installed:
  bridge-utils cgroupfs-mount containerd docker.io git git-man liberror-perl pigz runc ubuntu-fan
0 upgraded, 10 newly installed, 0 to remove and 384 not upgraded.
Need to get 56.9 MB of archives.
After this operation, 291 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://cn.archive.ubuntu.com/ubuntu bionic/universe amd64 pigz amd64 2.4-1 [57.4 kB]
Get:2 http://cn.archive.ubuntu.com/ubuntu bionic/main amd64 bridge-utils amd64 1.5-15ubuntu1 [30.1 kB]
Get:3 http://cn.archive.ubuntu.com/ubuntu bionic/universe amd64 cgroupfs-mount all 1.4 [6,320 B]
Get:4 http://cn.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 runc amd64 1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.2 [1,903 kB]
Get:5 http://cn.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 containerd amd64 1.2.6-0ubuntu1~18.04.2 [19.4 MB]                                                                                  
Get:6 http://cn.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 docker.io amd64 18.09.7-0ubuntu1~18.04.3 [30.7 MB]                                                                                 
Get:7 http://cn.archive.ubuntu.com/ubuntu bionic/main amd64 liberror-perl all 0.17025-1 [22.8 kB]                                                                                                          
Get:8 http://cn.archive.ubuntu.com/ubuntu bionic-updates/main amd64 git-man all 1:2.17.1-1ubuntu0.4 [803 kB]                                                                                               
Get:9 http://cn.archive.ubuntu.com/ubuntu bionic-updates/main amd64 git amd64 1:2.17.1-1ubuntu0.4 [3,907 kB]                                                                                               
Get:10 http://cn.archive.ubuntu.com/ubuntu bionic/main amd64 ubuntu-fan all 0.12.10 [34.7 kB]                                                                                                              
Fetched 56.9 MB in 1min 31s (622 kB/s)                                                                                                                                                                     
Preconfiguring packages ...
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(Reading database ... 159769 files and directories currently installed.)
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Unpacking pigz (2.4-1) ...
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Setting up liberror-perl (0.17025-1) ...
Setting up cgroupfs-mount (1.4) ...
Setting up containerd (1.2.6-0ubuntu1~18.04.2) ...
Created symlink /etc/systemd/system/multi-user.target.wants/containerd.service → /lib/systemd/system/containerd.service.
Setting up bridge-utils (1.5-15ubuntu1) ...
Setting up ubuntu-fan (0.12.10) ...
Created symlink /etc/systemd/system/multi-user.target.wants/ubuntu-fan.service → /lib/systemd/system/ubuntu-fan.service.
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Setting up pigz (2.4-1) ...
Setting up git (1:2.17.1-1ubuntu0.4) ...
Setting up docker.io (18.09.7-0ubuntu1~18.04.3) ...
Adding group `docker' (GID 127) ...
Done.
Created symlink /etc/systemd/system/sockets.target.wants/docker.socket → /lib/systemd/system/docker.socket.
Processing triggers for ureadahead (0.100.0-20) ...
Processing triggers for systemd (237-3ubuntu10.9) ...

 

安装后，当前用户（普通用户）不能直接使用docker命令，需要更新。

$ docker ps
Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.39/containers/json: 
dial unix /var/run/docker.sock: connect: permission denied

 

解决：添加当前用户到docker用户组

创建用户组
$ sudo groupadd docker
添加当前用户到docker组
$ sudo usermod -aG docker $USER
重启docker
$ service docker restart

其实，重启docker后普通用户也直接使用docker命令，仍然提示没有权限。

此时，执行下面的命令可以解决问题：
$ newgrp - docker

Finally，重启Ubuntu解决了问题。

 

权限问题由下面的文件造成：

/var/run$ ls -l | grep docker
drwx------  5 root  root    120 7月  17 14:35 docker
-rw-r--r--  1 root  root      4 7月  17 14:35 docker.pid
srw-rw----  1 root  docker    0 7月  17 14:35 docker.sock

 

Docker版本：

$ docker version
Client:
 Version:           18.09.7
 API version:       1.39
 Go version:        go1.10.1
 Git commit:        2d0083d
 Built:             Wed Jul  3 12:13:59 2019
 OS/Arch:           linux/amd64
 Experimental:      false

Server:
 Engine:
  Version:          18.09.7
  API version:      1.39 (minimum version 1.12)
  Go version:       go1.10.1
  Git commit:       2d0083d
  Built:            Mon Jul  1 19:31:12 2019
  OS/Arch:          linux/amd64
  Experimental:     false

 

疑问：docker用户和docker的关系是什么？

 

修改为国内镜像：网易的、Docker中国的

daemon.json默认是没有的，需要新建，，

/etc/docker$ sudo vim daemon.json

/etc/docker$ cat daemon.json 
{
  "registry-mirrors": ["http://hub-mirror.c.163.com", "https://registry.docker-cn.com"]
}

 

安装完毕，接下来，使用各种docker命令实战。

 

转载于:https://www.cnblogs.com/luo630/p/11201201.html