Hi Max, I have a working Xenserver pool using Ceph RBD as a backend.. I got it working by using the RBDSR plugin here: https://github.com/mstarikov/rbdsr
I don't have much time, but I just wanted to respond in case it's helpful... Here is how I got it working: On CEPH Set tunables to legacy # ceph osd crush tunables legacy Disable chooseleaf_vary_r # ceph osd getcrushmap -o /tmp/mycrushmap # crushtool -d /tmp/mycrushmap > /tmp/mycrushmap.txt chooseleaf_vary_r 0 # crushtool -c /tmp/mycrushmap.txt -o /tmp/mycrushmap.new # ceph osd setcrushmap -i /tmp/mycrushmap.new Create RBD image # rbd create *pool*/*image* --size *512G* --image-shared Remove Deep-flatten feature # rbd feature disable *pool*/*image* deep-flatten On XenServer (Install the RBDSR plugin on every node) To Create SR on XenServer # modprobe rbd (make sure the are no errors) # xe sr-create type=lvmoiscsi name-label=*RBD IMAGE NAME* shared=true device-config:target=*CEPH MONITOR IP* device-config:port=6789 device-config:targetIQN=*RBD POOL NAME* device-config:SCSIid=*MOUNT NAME* device-config:chapuser=*CEPHUSER* device-config:chappassword=*PASSWORD* NOTES: - The GUI option doesn't work, but the above command works every time. - If you you have more than one XenServer and they are on a Pool, you have to run the sr-create command on one node, then the other(s) pool members will need to rejoin the Pool for the sr to be shared accross the pool. I couldn't get the mounts working on other pool members of an existing pool. Let me know if you have any questions. Cheers, Mike
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