扩展仓库（extras）
扩展仓库主要存放了virtual、ceph、kubernetes、epel、openstack 等相关软件源。
首先用户需要确认系统中已经配置并开启扩展仓库，配置文件如下：
[extras]
name=Loongnix server $releasever - Extras
baseurl=http://pkg.loongnix.cn/loongnix-server/$releasever/extras/$basearch/release/
gpgcheck=0
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-LOONGNIX
该仓库中提供了 10 个 loongnix-release 相关包，可以通过执行命令：yum search loongnix-release 查看可安装的扩展仓库。详细列表如下：
| 扩展仓库软件包名 | 含义 |
|---|---|
| loongnix-release | Loongnix-Server Linux release files |
| loongnix-release-advanced-virtualization | Advanced Virtualization packages from the Loongnix Virtualization SIG repository |
| loongnix-release-ceph-nautilus | Ceph Nautilus packages from the Loongnix |
| loongnix-release-ceph-pacific | Ceph Pacific packages from the Loongnix repository |
| loongnix-release-epel | Extra Packages for Enterprise Linux repository configuration |
| loongnix-release-kubernetes | Config to enable the repository for the kubernetes |
| loongnix-release-nfv-openvswitch | Common release file to establish shared metadata Loongnix |
| loongnix-release-openstack-ussuri | OpenStack from the Loongnix Cloud SIG repo configs |
| loongnix-release-qpid-proton | Config to enable the Messaging SIG QPID Proton packages |
| loongnix-release-rabbitmq-38 | messaging Loongnix repo configs |
用户可根据需求使用 yum install 命令安装对应的软件包即可。