基于alios（centos 7.2） 安装 docker

参考文档：

https://help.aliyun.com/document_detail/51853.html?spm=a2c4g.264695.0.0.55c91e18zfwqrz#section-gtl-cjs-ls2

https://developer.aliyun.com/article/1148896

https://blog.csdn.net/qq_32828933/article/details/88656414

https://github.com/huataihuang/cloud-atlas-draft/blob/master/os/linux/redhat/package/convert_alios_to_centos.md

https://unix.stackexchange.com/questions/250249/error-after-installing-dnf-on-centos-7

http://www.hackdig.com/01/hack-248914.htm

https://www.cnblogs.com/wangqingyong/p/14228735.html

安装社区版Docker（docker-ce）

1. 下载docker-ce的yum源：

wget -O /etc/yum.repos.d/docker-ce.repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

2. 安装docker-ce：

yum -y install docker-ce

可能会报错：

Error: Package: containerd.io-1.6.21-3.1.el7.x86_64 (docker-ce-stable)

           Requires: container-selinux >= 2:2.74

Error: Package: docker-ce-rootless-extras-24.0.1-1.el7.x86_64 (docker-ce-stable)

           Requires: slirp4netns >= 0.4

Error: Package: 3:docker-ce-24.0.1-1.el7.x86_64 (docker-ce-stable)

           Requires: container-selinux >= 2:2.74

Error: Package: docker-ce-rootless-extras-24.0.1-1.el7.x86_64 (docker-ce-stable)

           Requires: fuse-overlayfs >= 0.7

 解决：

https://developer.aliyun.com/article/1148896

查看有没有

yum search container-selinux

结果：

warning: Found BDB Packages database while attempting lmdb backend: using bdb backend.
Loaded plugins: branch, fastestmirror, langpacks
Trying branch: stable
Loading mirror speeds from cached hostfile
 * epel: mirrors.tuna.tsinghua.edu.cn
warning: Found BDB Packages database while attempting lmdb backend: using bdb backend.
warning: Found BDB Packages database while attempting lmdb backend: using bdb backend.
Warning: No matches found for: container-selinux
No matches found

发现没有这个

解决方式：去官网找，增加官网源

在docker-ce.repo中添加centos-extras源

vim /etc/yum.repos.d/docker-ce.repo

在文档最上面添加源

[centos-extras]
name=Centos extras - $basearch
enabled=1
gpgcheck=0
baseurl=http://mirror.centos.org/centos/7/extras/x86_64

配置完成后的

esc -> :wq 保存退出后，安装三个包：

 yum install  slirp4etns fuse-overlayfs container-selinux

然后安装docker：

yum -y install docker-ce

启动、查看状态：

systemctl start docker

systemctl status docker

　

刚开始参考的：https://help.aliyun.com/document_detail/264695.html?spm=a2c4g.187598.0.0.37c31e18BJaJiR （Alibaba Cloud Linux 3）

发现不行，卡在

Failed to open: /var/cache/dnf/x86_64/7.2/x86_64/7.2/epel/repodata/bcad035bfd456bd33c633b0cefd435c50fd59150e22552236db05ea139f8937b-updateinfo.xml.bz2.

 

网上说卸载掉： epel-release

但卸载完发现安装不了 docker，报：

No package docker available.

 

进入死循环，遂先放弃，回头再研究