在线安装docker
以下操作步骤均在root用户下操作
1、 检查内核是否符合要求
Docker 要求 Centos系统的内核版本高于 3.10 ,建议在Centos 7版本
命令如下:
uname -r
执行过程如下:
[root@localhost yum.repos.d]# uname -r
3.10.0-693.el7.x86_64
2、 配置docker镜像源
命令如下:
wget -O /etc/yum.repos.d/docker-ce.repo https://download.docker.com/linux/centos/docker-ce.repo yum makecache
执行过程如下:
[root@localhost yum.repos.d]# wget -O /etc/yum.repos.d/docker-ce.repo https://download.docker.com/linux/centos/docker-ce.repo
--2018-02-09 07:51:02-- https://download.docker.com/linux/centos/docker-ce.repo
正在解析主机 download.docker.com (download.docker.com)... 205.251.203.37, 205.251.203.39, 205.251.203.182, ...
正在连接 download.docker.com (download.docker.com)|205.251.203.37|:443... 已连接。
已发出 HTTP 请求,正在等待回应... 200 OK
长度:2424 (2.4K) [binary/octet-stream]
正在保存至: “/etc/yum.repos.d/docker-ce.repo”
100%[================================================================================>] 2,424 --.-K/s 用时 0s
2018-02-09 07:51:04 (320 MB/s) - 已保存 “/etc/yum.repos.d/docker-ce.repo” [2424/2424])
[root@localhost ~]# yum makecache
已加载插件:fastestmirror, langpacks
base | 3.6 kB 00:00:00
docker-ce-stable | 2.9 kB 00:00:00
extras | 3.4 kB 00:00:00
updates | 3.4 kB 00:00:00
(1/3): docker-ce-stable/x86_64/primary_db | 11 kB 00:00:01
(2/3): docker-ce-stable/x86_64/filelists_db | 6.5 kB 00:00:01
(3/3): docker-ce-stable/x86_64/other_db | 65 kB 00:00:00
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
元数据缓存已建立
3、 安装docker依赖包
命令如下:
yum remove docker docker-common docker-selinux docker-engine yum install -y yum-utils device-mapper-persistent-data lvm2
执行过程如下:
[root@localhost ~]# yum remove docker docker-common docker-selinux docker-engine 删除老版本
已加载插件:fastestmirror, langpacks
参数 docker 没有匹配
参数 docker-common 没有匹配
参数 docker-selinux 没有匹配
参数 docker-engine 没有匹配
不删除任何软件包
[root@localhost ~]# yum install -y yum-utils device-mapper-persistent-data lvm2 安装依赖包
已加载插件:fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
。。。。。。
。。。。。。
更新完毕:
device-mapper-persistent-data.x86_64 0:0.7.0-0.1.rc6.el7_4.1
完毕
4、 安装docker-ce
命令如下:
yum install docker-ce
执行过程如下:
[root@localhost ~]# yum install docker-ce
已加载插件:fastestmirror, langpacks
Loading mirror speeds from cached hostfile
base: mirrors.aliyun.com extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
正在解决依赖关系
--> 正在检查事务
---> 软件包 docker-ce.x86_64.0.17.12.0.ce-1.el7.centos 将被 安装
--> 正在处理依赖关系 container-selinux >= 2.9,它被软件包 docker-ce-17.12.0.ce-1.el7.centos.x86_64 需要
--> 正在检查事务
---> 软件包 container-selinux.noarch.2.2.36-1.gitff95335.el7 将被 安装
--> 解决依赖关系完成
依赖关系解决
===============================================================================
Package 架构 版本 源 大小
===============================================================================
正在安装:
docker-ce x86_64 17.12.0.ce-1.el7.centos docker-ce-stable 30 M
为依赖而安装:
container-selinux noarch 2:2.36-1.gitff95335.el7 extras 31 k
事务概要
===============================================================================
安装 1 软件包 (+1 依赖软件包)
总下载量:30 M
安装大小:123 M
Is this ok [y/d/N]: y
Downloading packages:
(1/2): container-selinux-2.36-1.gitff95335.el7.noarch.rpm | 31 kB 00:00:01
warning: /var/cache/yum/x86_64/7/docker-ce-stable/packages/docker-ce-17.12.0.ce-1.el7.centos.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
docker-ce-17.12.0.ce-1.el7.centos.x86_64.rpm 的公钥尚未安装
(2/2): docker-ce-17.12.0.ce-1.el7.centos.x86_64.rpm | 30 MB 00:00:06
----------------------------------------------------------------------------------
总计 4.4 MB/s | 30 MB 00:00:06
从 https://download.docker.com/linux/centos/gpg 检索密钥
导入 GPG key 0x621E9F35:
用户ID : "Docker Release (CE rpm) docker@docker.com"
指纹 : 060a 61c5 1b55 8a7f 742b 77aa c52f eb6b 621e 9f35
来自 : https://download.docker.com/linux/centos/gpg
是否继续?[y/N]:y
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
正在安装 : 2:container-selinux-2.36-1.gitff95335.el7.noarch 1/2
正在安装 : docker-ce-17.12.0.ce-1.el7.centos.x86_64 2/2
验证中 : 2:container-selinux-2.36-1.gitff95335.el7.noarch 1/2
验证中 : docker-ce-17.12.0.ce-1.el7.centos.x86_64 2/2
已安装:
docker-ce.x86_64 0:17.12.0.ce-1.el7.centos
作为依赖被安装:
container-selinux.noarch 2:2.36-1.gitff95335.el7
完毕!
5、 启动docker 后台服务
命令如下:
systemctl start docker
执行过程如下:
[root@localhost ~]# systemctl start docker
6、 测试运行hello-world
命令如下:
docker run hello-world
执行过程如下:
[root@localhost ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
ca4f61b1923c: Pull complete
Digest: sha256:66ef312bbac49c39a89aa9bcc3cb4f3c9e7de3788c944158df3ee0176d32b751
Status: Downloaded newer image for hello-world:latest
Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message, Docker took the following steps:
- The Docker client contacted the Docker daemon.
- The Docker daemon pulled the "hello-world" image from the Docker Hub.(amd64)
- The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading.
- The Docker daemon streamed that output to the Docker client, which sent it to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
https://cloud.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/engine/userguide/