本文介绍如何通过libvirt为虚拟机添加rbd类型的数据盘。
1. 为admin用户生成ceph认证的秘钥
cat > secret.xml <<EOF
<secret ephemeral='no' private='no'>
<usage type='ceph'>
<name>client.admin secret</name>
</usage>
</secret>
EOF
2.定义秘钥
virsh secret-define --file secret.xml # 会生成一个uuid3.获取admin用户的keyring
ceph auth get-key client.admin| sudo tee client.admin.key4. 为秘钥设置uuid
virsh secret-set-value --secret {生成的uuid} --base64 $(cat client.admin.key) && rm client.admin.key secret.xml5.编辑虚拟机配置，其中的uuid是我们生成的，不是集群的fsid
<disk type='network' device='disk'>
<driver name='qemu'/>
<auth username='admin'>
<secret type='ceph' uuid='3e1da0e5-5dc2-4e68-a52e-496876a66867'/>
</auth>
<source protocol='rbd' name='rbd/sap2'>
<host name='CEPH MONITOR IP' port='6789'/>
<host name='CEPH MONITOR IP' port='6789'/>
<host name='CEPH MONITOR IP' port='6789'/>
</source>
<target dev='vde' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0d' function='0x0'/>
</disk>配置完成后启动虚拟机，即可正常使用rbd类型的云硬盘
