fedora21 安装 docker 1.8.2

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博客介绍了在Fedora系统安装Docker的相关要求和步骤。Fedora需19以上64位版本才支持docker，28后的版本支持docker-ce社区版。还给出官方安装文档链接，说明了删除旧版、安装相关包、启动docker、开机启动及测试等操作。

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Fedora版本要在19以上，64位版本系统才支持docker。

Fedora 28 后的版本才支持 docker-ce docker社区版；我们这次装的是Docker version 1.8.2.fc21

官方的ce版在 fedora的安装文档说明

https://docs.docker.com/install/linux/docker-ce/fedora/

先删除旧版的docker，

sudo yum -y remove docker

把wmdocker包和docker-io包一起装上：

sudo yum install wmdocker
sudo yum  install docker-io

跑完安装，可以启动docker了：

sudo systemctl start docker

开机启动：

sudo systemctl enable docker

测试一下是否正常：

sudo docker run -i -t fedora /bin/bash

Unable to find image 'fedora:latest' locally 而且没有下载更新

执行这行命令

sudo docker search --stars=2 fedora

INDEX       NAME                                         DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
docker.io   docker.io/fedora                             Official Docker builds of Fedora                802       [OK]       
docker.io   docker.io/fedora/apache                                                                      36                   [OK]
docker.io   docker.io/fedora/nginx                                                                       20                   [OK]
docker.io   docker.io/mattsch/fedora-nzbhydra            Fedora NZBHydra                                 5                    [OK]
docker.io   docker.io/darksheer/fedora22                 Base Fedora 22 Image -- Updated hourly          3                    [OK]
docker.io   docker.io/vbatts/fedora-varnish              https://github.com/vbatts/laughing-octo/tr...   2                    [OK]
docker.io   docker.io/vergissberlin/fedora-development   Docker fedora image to use for development...   2                    [OK]

再执行下命令：

sudo docker run -i -t fedora /bin/bash

看到下面的更新信息后就好了：

Unable to find image 'fedora:latest' locally
Trying to pull repository docker.io/library/fedora ...
latest: Pulling from docker.io/library/fedora 7c91a140e7a1: Downloading 3.772 MB/72.87 MB
docker run -i -t fedora /bin/bash
Unable to find image 'fedora:latest' locally
Trying to pull repository docker.io/library/fedora ...
latest: Pulling from docker.io/library/fedora 7c91a140e7a1: Pull complete
Digest: sha256:a97914edb6ba15deb5c5acf87bd6bd5b6b0408c96f48a5cbd
Status: Downloaded newer image for docker.io/fedora:latest
docker run -i -t fedora /bin/bash
Unable to find image 'fedora:latest' locally
Trying to pull repository docker.io/library/fedora ...
latest: Pulling from docker.io/library/fedora 7c91a140e7a1: Downloading 3.232 MB/72.87 MB

然后就可以进入一个docker下的bash环境：


root@localhost ~ $ docker --version 
Docker version 1.8.2.fc21, build 3abcea7-dirty

root@localhost /etc/docker $ docker run -i -t fedora /bin/bash
[root@c2753dac949c /]# cat /etc/redhat-release 
Fedora release 30 (Thirty)
[root@c2753dac949c /]#


打开另一同主机的session，可以看到刚刚创建的容器正在运行
root@localhost ~ $ docker ps -a
CONTAINER ID        IMAGE                     COMMAND             CREATED             STATUS                     PORTS               NAMES
c2753dac949c        fedora                    "/bin/bash"         18 seconds ago      Up 18 seconds                                  elated_hodgkin