@olivierlambert this is holding up quite well. I've pounded it good doing 3 exports and an import simultaneously and maintained about 60mb sec writes while doing reads and writes asynchronous as the imports and exports are on the same cephfs. Had an issue with the ceph repository moving to the pool when I created the pool and wound up hosing my pool manager trying to fix it but setting new pool manager and rebuilding the other and it has been flawless since. I've built the XO from source and it has come a long way from the last time I looked at it. We went with a small vendor out of canada called 45drives for the ceph hardware and deployment and they have a nice ansible derived delivery and config package if anyone is looking for a supported solution that is pretty slick.

@olivierlambert nevermind I fixed it, I had forgot to add the public side of my ceph network onto the new host and then it all scanned correctly. Thanks for being responsive and a little education as it always helps.

@olivierlambert I guess I just need to understand what the difference in xosan and xostore is plus how that relates to vmwares shared storage. Good your busy keeps the lights on and growing.

Ok it gets better I have 4 R730 with 6 10ge fiber ports 512gb ram each with san backend to use for the migration. Then once I have the migration tested and working move off the vmware rebuild the dell p570f servers to xcp-ng with xostor and move it back then I have some serious playing space for snapshots and all kinds of fun. Does anyone see any gotchas for this project?

@scboley Ok been doing a little viewing as I haven't looked at the XCP-NG offerings in a while. So XOSTOR is hyperconverged vsan replacement. So would it be possible to take a 5 node Dell VXRail and purchase one extra and configure it with 8.2 XO and XOSTOR and then start moving things onto this take one of the 5 and load with XCP-NG and move some more and eventually replace all of the VMware? Has anyone done something like this? Is XOSTOR a dual type of VSAN offering since it's what is replacing XOSAN? @olivierlambert thoughts?

I have a unique opportunity with my parent company to get them off a VXRail VSan/Vsphere and go to XCP-NG. I will build an interim pool to live migrate from the vsphere to xcp and then here's my question. Has anyone taken a vxrail system and used XCP-NG and how would you implement the shared storage aspects of it? In my little world I've been using XCP for several years with a 45drives CEPH cluster on the backend and love it.

@olivierlambert so are you completely on your own release schedule now or are you still tied to citrix version releases? I've used you since 7.x versions and have had zero issues and still have one 6.5 I'm going to migrate a vm off of because it was on local storage and it's quite large and I didn't want to redo it because of the storage changes from 6 to 7 and then I'll have a pool with all 8.2 after I patch up my other 8.2 and then rebuild the 6.5 to 8.2.

@olivierlambert that is right and its up and running using the driver you guys built and taking a good load no issues. Hats off to you and your team for making this work. I used nfs for exporting off my old ceph system but the importing is strictly on your native cephfs drivers. On my old one I was on xcp-ng 7.6 and had nfs sitting over the cephfs and just gigabit network and it worked but no live movement at all and now I can live migrate no problems with bonded dual 10gb fiber and single 10gb fiber to the hosts.

@olivierlambert this is holding up quite well. I've pounded it good doing 3 exports and an import simultaneously and maintained about 60mb sec writes while doing reads and writes asynchronous as the imports and exports are on the same cephfs. Had an issue with the ceph repository moving to the pool when I created the pool and wound up hosing my pool manager trying to fix it but setting new pool manager and rebuilding the other and it has been flawless since. I've built the XO from source and it has come a long way from the last time I looked at it. We went with a small vendor out of canada called 45drives for the ceph hardware and deployment and they have a nice ansible derived delivery and config package if anyone is looking for a supported solution that is pretty slick.

@olivierlambert nevermind I fixed it, I had forgot to add the public side of my ceph network onto the new host and then it all scanned correctly. Thanks for being responsive and a little education as it always helps.

@olivierlambert

Nov 21 10:20:11 xcp4-1 SM: [30250] vhd=/var/run/sr-mount/51b80ad1-820d-c29a-1f9c-a50d6454f927/.vhd scan-error=-5 error-message='failure scanning target'
Nov 21 10:20:11 xcp4-1 SM: [30250] scan failed: -5
Nov 21 10:20:11 xcp4-1 SM: [30250] ', stderr: ''
Nov 21 10:20:12 xcp4-1 SM: [30250] ['/usr/bin/vhd-util', 'scan', '-f', '-m', '/var/run/sr-mount/51b80ad1-820d-c29a-1f9c-a50d6454f927/.vhd']
Nov 21 10:20:12 xcp4-1 SM: [30250] FAILED in util.pread: (rc 5) stdout: 'vhd=/var/run/sr-mount/51b80ad1-820d-c29a-1f9c-a50d6454f927 scan-error=2 error-message='failure
scanning target'
Nov 21 10:20:12 xcp4-1 SM: [30250] vhd=/var/run/sr-mount/51b80ad1-820d-c29a-1f9c-a50d6454f927/*.vhd scan-error=-5 error-message='failure scanning target'
Nov 21 10:20:12 xcp4-1 SM: [30250] scan failed: -5

@olivierlambert adding another host to the pool and it fails to connect to the ceph shared storage:

Nov 21 09:57:48 xcp4-1 xapi: [debug||116026 /var/lib/xcp/xapi|SR.scan R:05af02328263|helpers] Waiting for up to 12.902806 seconds before retrying...
Nov 21 09:57:59 xcp4-1 xapi: [debug||116027 /var/lib/xcp/xapi||dummytaskhelper] task dispatch:session.logout D:79aefd48b34b created by task D:f32e5efdeec8
Nov 21 09:57:59 xcp4-1 xapi: [ info||116027 /var/lib/xcp/xapi|session.logout D:67032978d90c|xapi_session] Session.destroy trackid=c8a5d1fe7e932298b267edb677909a4b
Nov 21 09:57:59 xcp4-1 xapi: [debug||116028 /var/lib/xcp/xapi||dummytaskhelper] task dispatch:session.slave_login D:0366d884ee46 created by task D:f32e5efdeec8
Nov 21 09:57:59 xcp4-1 xapi: [ info||116028 /var/lib/xcp/xapi|session.slave_login D:b39585e0b07e|xapi_session] Session.create trackid=fc78c651286146c61742b0ca74212bb9 pool=true uname= originator=xapi is_local_superuser=true auth_user_sid= parent=trackid=9834f5af41c964e225f24279aefe4e49
Nov 21 09:57:59 xcp4-1 xapi: [debug||116029 /var/lib/xcp/xapi||dummytaskhelper] task dis

Nov 21 09:59:34 xcp4-1 xapi: [ info||116009 HTTPS 192.168.254.101->|Async.PBD.plug R:631710626e67|xapi_session] Session.destroy trackid=726402fee499e51bb72de7fd054a93d0
Nov 21 09:59:34 xcp4-1 xapi: [debug||116009 HTTPS 192.168.254.101->|Async.PBD.plug R:631710626e67|message_forwarding] Unmarking SR after PBD.plug (task=OpaqueRef:63171062-6e67-4cbd-b3be-91bb534a94bf)
Nov 21 09:59:34 xcp4-1 xapi: [error||116009 ||backtrace] Async.PBD.plug R:631710626e67 failed with exception Server_error(SR_BACKEND_FAILURE_12, [ ; mount failed with return code 32; ])
Nov 21 09:59:34 xcp4-1 xapi: [error||116009 ||backtrace] Raised Server_error(SR_BACKEND_FAILURE_12, [ ; mount failed with return code 32; ])
Nov 21 09:59:34 xcp4-1 xapi: [error||116009 ||backtrace] 1/1 xapi Raised at file (Thread 116009 has no backtrace table. Was with_backtraces called?, line 0
Nov 21 09:59:34 xcp4-1 xapi: [error||116009 ||backtrace]