ovirt社区提供的对接ceph的方案
1. 流程图
2. 安装openstack环境
rdo的方式安装openstack
网址: www.2cto.com/net/201704/619639.html
ovirt-engine通过openstack的java sdk调用cinder服务
将cinder和ceph对接好
3. ovirt界面操作
Add Provider弹出框里面的内容设置
Name： cinder1
Type： Openstack Volume
Provider URL： http://192.168.1.179:8776
钩上Requires Authentication选项
Username ：cinder
password 在/etc/cinder/cinder.conf文件里面可以找到 keystone_authtoken -> password
Tenant Name services 在/etc/cinder/cinder.conf文件里面可以找到 keystone_authtoken -> project_name
Authentication URL： http://192.168.1.179:35357/v2.0
点击Test按钮，测试成功表示可以连接
4. 创建磁盘
磁盘能够成功的创建，也能在ceph存储池里面看到，
5. 启动虚拟机
但是不能启动虚拟机
错误如下：
2017-08-22 18:25:54,722+0200 ERROR (vm/c6aa509b) [virt.vm] (vmId='c6aa509b-bc6b-48d8-8b36-6d4ec7a01791') The vm start process failed (vm:631)
Traceback (most recent call last):
File "/usr/share/vdsm/virt/vm.py", line 562, in _startUnderlyingVm
self._run()
File "/usr/share/vdsm/virt/vm.py", line 2021, in _run
self._connection.createXML(domxml, flags),
File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 123, in wrapper
ret = f(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 941, in wrapper
return func(inst, *args, **kwargs)
File "/usr/lib64/python2.7/site-packages/libvirt.py", line 3782, in createXML
if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self)
libvirtError: internal error: process exited while connecting to monitor: 2017-08-22T16:25:54.063094Z qemu-kvm: -drive file=rbd:volumes/volume-41e58877-bd12-49b0-9b02-6fe6ceda994e:auth_supported=none:mon_host=126.251.0.246\:6789\;126.251.0.247\:6789\;126.251.0.248\:6789,format=raw,if=none,id=drive-virtio-disk0,cache=none,werror=stop,rerror=stop,aio=threads: error connecting: Connection timed out
2017-08-22 18:25:54,725+0200 INFO (vm/c6aa509b) [virt.vm] (vmId='c6aa509b-bc6b-48d8-8b36-6d4ec7a01791') Changed state to Down: internal error: process exited while connecting to monitor: 2017-08-22T16:25:54.063094Z qemu-kvm: -drive file=rbd:volumes/volume-41e58877-bd12-49b0-9b02-6fe6ceda994e:auth_supported=none:mon_host=126.251.0.246\:6789\;126.251.0.247\:6789\;126.251.0.248\:6789,format=raw,if=none,id=drive-virtio-disk0,cache=none,werror=stop,rerror=stop,aio=threads: error connecting: Connection timed out (code=1) (vm:1221)
2017-08-22 18:25:54,726+0200 INFO (vm/c6aa509b) [virt.vm] (vmId='c6aa509b-bc6b-48d8-8b36-6d4ec7a01791') Stopping connection (guestagent:430)
2017-08-22 18:25:55,738+0200 INFO (jsonrpc/6) [vdsm.api] START destroy(gracefulAttempts=1) from=::ffff:10.0.0.1,56056 (api:46)
2017-08-22 18:25:55,739+0200 INFO (jsonrpc/6) [virt.vm] (vmId='c6aa509b-bc6b-48d8-8b36-6d4ec7a01791') Release VM resources (vm:4239)
问题分析：
在这台主机上，后台的ceph命令不能使用，表明这台主机和ceph存储域的联通性没有配置好
6. 存在的问题
6.1 存在单点故障的问题
需要做cinder节点的高可用；
keystone的高可用；
sql数据库的高可用；
6.2 增加运维难度
需要维护openstack环境，那这样的话还用什么ovirt，直接用openstack不是更好吗
7. 我的方案
自己在ovirt的基础上开发一套对接ceph的API，主要是虚拟机相关的一系列操作，对接的是RBD接口的python api