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    CEPH FS Storage Driver

    Scheduled Pinned Locked Moved Development
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    • M Offline
      maxcuttins
      last edited by

      @r1 said in CEPH FS Storage Driver:

      patch -p0 < ceph.patch

      This went not so smooth, reporting "unexpected end":

      patch -p0 < ceph.patch
patching file /opt/xensource/sm/nfs.py
patching file /opt/xensource/sm/NFSSR.py
patch unexpectedly ends in middle of line
Hunk #3 succeeded at 197 with fuzz 1.
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      • R Offline
        r1 XCP-ng Team
        last edited by

        Hi @maxcuttins - what's your XCP-NG version and can you share checksum for your NFSSR.py file?

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        • R Offline
          Rainer
          last edited by Rainer

          Hi,

          I also play around with xcp-ng and ceph and just tried to use CephFS as a storage repos. I am using XCP-ng 8.0.0 with Ceph Nautilus. Before I tried to use lvm on top of a rbd which basically works but performance is really bad this way.

          So I downloaded your patch and ran it on my test 8.0.0 xenserver, all Hunks succeeded. ceph is also installed, modprobe ceph works. Next I tried to add a new cephFs repository just as you described it above.

          In the end I see an error box pooping up in XencCenter: "SM has thrown a generic python exception". And thats all.

          In /var/log/SMlog I see the log attached below.

          Thanks
          Rainer

          /var/log/SMLog:

          Sep 26 09:42:54 rzinstal4 SM: [18075] lock: opening lock file /var/lock/sm/d63d0d49-522d-6160-a1eb-a9d5f34cec1e/sr
Sep 26 09:42:54 rzinstal4 SM: [18075] lock: acquired /var/lock/sm/d63d0d49-522d-6160-a1eb-a9d5f34cec1e/sr
Sep 26 09:42:54 rzinstal4 SM: [18075] sr_create {'sr_uuid': 'd63d0d49-522d-6160-a1eb-a9d5f34cec1e', 'subtask_of': 'DummyRef:|55cbc4ef-c6e9-4dba-aa5f-8f56b2473443|SR.create', 'args': ['0'], 'host_ref': 'OpaqueRef:0c03f516-7ed5-48ac-895b-51833177aed5', 'session_ref': 'OpaqueRef:d472846e-c6aa-467d-ac8b-0f401fbc698c', 'device_config': {'server': 'ip_of_mon', 'SRmaster': 'true', 'serverpath': '/sds', 'options': 'name=admin,secretfile=/etc/ceph/admin.secret'}, 'command': 'sr_create', 'sr_ref': 'OpaqueRef:9fb35d75-a45c-4ce4-b9f4-8ed8072ad6ad'}
Sep 26 09:42:54 rzinstal4 SM: [18075] ['/usr/sbin/rpcinfo', '-p', 'ip_of_mon']
Sep 26 09:42:54 rzinstal4 SM: [18075] FAILED in util.pread: (rc 1) stdout: '', stderr: 'rpcinfo: can't contact portmapper: RPC: Remote system error - Connection refused
Sep 26 09:42:54 rzinstal4 SM: [18075] '
Sep 26 09:42:54 rzinstal4 SM: [18075] Unable to obtain list of valid nfs versions
Sep 26 09:42:54 rzinstal4 SM: [18075] lock: released /var/lock/sm/d63d0d49-522d-6160-a1eb-a9d5f34cec1e/sr
Sep 26 09:42:54 rzinstal4 SM: [18075] ***** generic exception: sr_create: EXCEPTION <type 'exceptions.TypeError'>, not all arguments converted during string formatting
Sep 26 09:42:54 rzinstal4 SM: [18075]   File "/opt/xensource/sm/SRCommand.py", line 110, in run
Sep 26 09:42:54 rzinstal4 SM: [18075]     return self._run_locked(sr)
Sep 26 09:42:54 rzinstal4 SM: [18075]   File "/opt/xensource/sm/SRCommand.py", line 159, in _run_locked
Sep 26 09:42:54 rzinstal4 SM: [18075]     rv = self._run(sr, target)
Sep 26 09:42:54 rzinstal4 SM: [18075]   File "/opt/xensource/sm/SRCommand.py", line 323, in _run
Sep 26 09:42:54 rzinstal4 SM: [18075]     return sr.create(self.params['sr_uuid'], long(self.params['args'][0]))
Sep 26 09:42:54 rzinstal4 SM: [18075]   File "/opt/xensource/sm/NFSSR", line 216, in create
Sep 26 09:42:54 rzinstal4 SM: [18075]     raise exn
Sep 26 09:42:54 rzinstal4 SM: [18075]
Sep 26 09:42:54 rzinstal4 SM: [18075] ***** NFS VHD: EXCEPTION <type 'exceptions.TypeError'>, not all arguments converted during string formatting
Sep 26 09:42:54 rzinstal4 SM: [18075]   File "/opt/xensource/sm/SRCommand.py", line 372, in run
Sep 26 09:42:54 rzinstal4 SM: [18075]     ret = cmd.run(sr)
Sep 26 09:42:54 rzinstal4 SM: [18075]   File "/opt/xensource/sm/SRCommand.py", line 110, in run
Sep 26 09:42:54 rzinstal4 SM: [18075]     return self._run_locked(sr)
Sep 26 09:42:54 rzinstal4 SM: [18075]   File "/opt/xensource/sm/SRCommand.py", line 159, in _run_locked
Sep 26 09:42:54 rzinstal4 SM: [18075]     rv = self._run(sr, target)
Sep 26 09:42:54 rzinstal4 SM: [18075]   File "/opt/xensource/sm/SRCommand.py", line 323, in _run
Sep 26 09:42:54 rzinstal4 SM: [18075]     return sr.create(self.params['sr_uuid'], long(self.params['args'][0]))
Sep 26 09:42:54 rzinstal4 SM: [18075]   File "/opt/xensource/sm/NFSSR", line 216, in create
Sep 26 09:42:54 rzinstal4 SM: [18075]     raise exn
Sep 26 09:42:54 rzinstal4 SM: [18075]
Sep 26 09:42:54 rzinstal4 SM: [18075] lock: closed /var/lock/sm/d63d0d49-522d-6160-a1eb-a9d5f34cec1e/sr
          R 1 Reply Last reply Reply Quote 0
          • olivierlambertO Offline
            olivierlambert Vates 🪐 Co-Founder CEO
            last edited by

            Hi @Rainer and welcome 🙂

            Please use Markdown syntax for console/code blocks:

            ```
my test
```
            R 1 Reply Last reply Reply Quote 0
            • R Offline
              Rainer @olivierlambert
              last edited by

              Hello oliverlambert,
              thanks for the hint. I edited my post correcting the formatting.

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              • R Offline
                r1 XCP-ng Team @Rainer
                last edited by

                @Rainer Please share your NFSSR.py to check. Are you able to manually mount the SR using #mount.ceph addr1,addr2,addr3,addr4:remotepath localpath?

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                • R Offline
                  Rainer
                  last edited by

                  Hello,

                  thanks for your answer. I can mount the the CephFS filesystem on the xenserver this way:

                  mount.ceph  1.2.3.4:/base /mnt -o "name=admin,secretfile=/etc/ceph/admin.secret"

                  where 1.2.3.4 is the IP of the active ceph monitor.

                  In xencenters New-SR-dialog I put the "1.2.3.4:/base" part in the "Share Name" input field and the options name=admin,secretfile=/etc/ceph/admin.secret in the "Advanced Options" field .

                  Below I attached my patched /opt/xensource/sm/NFSSR.py file:
                  [0_1569574207746_NFSSR.py](Uploading 100%)

                  NFSSR.py.txt

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                  • R Offline
                    r1 XCP-ng Team
                    last edited by

                    Just so you know - the original patch was for XCP-NG 7.6. I'm checking it for XCP-NG 8.

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                    • R Offline
                      r1 XCP-ng Team
                      last edited by

                      Can you share /opt/xensource/sm/nfs.py as well... it was also supposed to be patched.

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                      • R Offline
                        r1 XCP-ng Team
                        last edited by

                        Updated new patch for XCP-NG 8.

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                        • olivierlambertO Offline
                          olivierlambert Vates 🪐 Co-Founder CEO
                          last edited by

                          Note that all are hacks are won't survive any upgrade and aren't supported 😉 But it's fine for a proof of concept.

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                          • R Offline
                            r1 XCP-ng Team
                            last edited by r1

                            Agree - unless we have enough interest from community to pack it or make it maintainable, it will stay a hack.

                            Also mentioning the command to apply patch # patch -d/ -p1 < cephfs-8.patch

                            Edit : updated patch strip level

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                            • R Offline
                              Rainer
                              last edited by Rainer

                              Hello and thanks for the new patch. I understand that this is only a kind of hack or better a proof of concept. I do not want to use this for a productive system but only wanted to give it a try with nautilus and see what performance I can expect if this hack hopefully develops to a supported integration of Ceph.

                              I hoped that the patch might work for XCP-ng 8.0 as well but it seems it does not that easily. So I could also install a xenserver 7.6 and use the original patch and test how it works for me. I do not want you to invest too much work in the 8.0 adoption. So if you think testing the patch 8.0 does not really help you in any way, then please do not hesitate and tell me. Else if you are as well interested to test if it works with 8.0 here is what I found out:

                              The new patch does not work completely, there is a "patch unexpectedly ends in middle of line" -warning. On a fresh installed system:

                              # cd /
# patch --verbose -p0  < /cephfs-8.patch
mm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|--- /opt/xensource/sm/nfs.py   20199-27 16:45:11.918853933 +0530
|+++ /opt/xensource/sm/nfs.py   20199-27 16:49:26.910379515 +0530
--------------------------
patching file /opt/xensource/sm/nfs.py
Using Plan A...
Hunk #1 succeeded at 137.
Hunk #2 succeeded at 159.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|--- /opt/xensource/sm/NFSSR.py 20199-27 16:44:56.437557255 +0530
|+++ /opt/xensource/sm/NFSSR.py 20199-27 17:07:45.651188670 +0530
--------------------------
patching file /opt/xensource/sm/NFSSR.py
Using Plan A...
Hunk #1 succeeded at 137.
Hunk #2 succeeded at 160.
patch unexpectedly ends in middle of line
Hunk #3 succeeded at 197 with fuzz 1.
done

                              I can do a ceph.mount just like described before but when I instead try to create a new Ceph-FS-SR named "Ceph" in xencenter 8.0.0 I still get the error that SM has thrown a generic python exception.

                              The SMlog error log indicates that creating a NFS repos is tried with the given parameters and not a CephFS one:

                              ...
Sep 30 13:03:05 rzinstal4 SM: [975] sr_create {'sr_uuid': '79cc55db-ee9f-9cc0-8d94-8cdb2915363b', 'subtask_of': 'DummyRef:|6456510f-b2dd-4dcd-b6ab-eb5eb40ceb9c|SR.create', 'args': ['0'], 'host_ref': 'OpaqueRef:72898e54-20b2-4046-9825-94553457fa60', 'session_ref': 'OpaqueRef:8a0819af-8b91-4086-a9cf-04ae37dc8e79', 'device_config': {'server': '1.2.3.4', 'SRmaster': 'true', 'serverpath': '/base', 'options': 'name=admin,secretfile=/etc/ceph/admin.secret'}, 'command': 'sr_create', 'sr_ref': 'OpaqueRef:91c592f6-47a0-40d6-8a33-7fe01831145f'}
Sep 30 13:03:05 rzinstal4 SM: [975] ['/usr/sbin/rpcinfo', '-p', '1.2.3.4']
Sep 30 13:03:05 rzinstal4 SM: [975] FAILED in util.pread: (rc 1) stdout: '', stderr: 'rpcinfo: can't contact portmapper: RPC: Remote system error - Connection refused
Sep 30 13:03:05 rzinstal4 SM: [975] '
Sep 30 13:03:05 rzinstal4 SM: [975] Unable to obtain list of valid nfs versions
...

                              I attached my /opt/xensource/sm/nfs.py file as well.

                              Thanks a lot

                              Rainer
                              nfs.py.txt

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                              • R Offline
                                r1 XCP-ng Team
                                last edited by

                                @r1 said in CEPH FS Storage Driver:

                                patch -d/ -p0 < cephfs-8.patch

                                Please try # patch -d/ -p0 < cephfs-8.patch

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                                • R Offline
                                  r1 XCP-ng Team
                                  last edited by r1

                                  I see that there is a call to check_server_tcp which is expected to return True but not doing so in my patch. I'll modify it.

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                                  • R Offline
                                    r1 XCP-ng Team
                                    last edited by

                                    The same patch is updated. Kindly download again and try with # patch -d/ -p1 < cephfs-8.patch.

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                                    • R Offline
                                      Rainer @r1
                                      last edited by

                                      Thanks for the new patch. Applying the patch does not report any errors or warnings. When I try to create a "NFS" SR I still get the generic python error message from xencenter however the error message in /var/log/SMlog has changed:

                                      Oct  1 10:17:52 xenserver8 SM: [4975] lock: opening lock file /var/lock/sm/76ad6fee-a7a8-34e6-bcce-a53f69a677a9/sr
Oct  1 10:17:52 xenserver8 SM: [4975] lock: acquired /var/lock/sm/76ad6fee-a7a8-34e6-bcce-a53f69a677a9/sr
Oct  1 10:17:52 xenserver8 SM: [4975] sr_create {'sr_uuid': '76ad6fee-a7a8-34e6-bcce-a53f69a677a9', 'subtask_of': 'DummyRef:|c98cee36-24ff-4575-b7
43-3a84cd93ed17|SR.create', 'args': ['0'], 'host_ref': 'OpaqueRef:72898e54-20b2-4046-9825-94553457fa60', 'session_ref': 'OpaqueRef:175293cb-a791-
44be-bd5f-a4cb911adddb', 'device_config': {'server': '1.2.3.4', 'SRmaster': 'true', 'serverpath': '/base', 'options': 'name=admin,secretfil
e=/etc/ceph/admin.secret'}, 'command': 'sr_create', 'sr_ref': 'OpaqueRef:a36f0371-1dc7-4685-a208-24e04a1c1e08'}
Oct  1 10:17:52 xenserver8 SM: [4975] lock: released /var/lock/sm/76ad6fee-a7a8-34e6-bcce-a53f69a677a9/sr
Oct  1 10:17:52 xenserver8 SM: [4975] ***** generic exception: sr_create: EXCEPTION <type 'exceptions.NameError'>, global name 'useroptions' is no
t defined
Oct  1 10:17:52 xenserver8 SM: [4975]   File "/opt/xensource/sm/SRCommand.py", line 110, in run
Oct  1 10:17:52 xenserver8 SM: [4975]     return self._run_locked(sr)
Oct  1 10:17:52 xenserver8 SM: [4975]   File "/opt/xensource/sm/SRCommand.py", line 159, in _run_locked
Oct  1 10:17:52 xenserver8 SM: [4975]     rv = self._run(sr, target)
Oct  1 10:17:52 xenserver8 SM: [4975]   File "/opt/xensource/sm/SRCommand.py", line 323, in _run
Oct  1 10:17:52 xenserver8 SM: [4975]     return sr.create(self.params['sr_uuid'], long(self.params['args'][0]))
Oct  1 10:17:52 xenserver8 SM: [4975]   File "/opt/xensource/sm/NFSSR", line 216, in create
Oct  1 10:17:52 xenserver8 SM: [4975]     raise exn
Oct  1 10:17:52 xenserver8 SM: [4975]
Oct  1 10:17:52 xenserver8 SM: [4975] ***** NFS VHD: EXCEPTION <type 'exceptions.NameError'>, global name 'useroptions' is not defined
Oct  1 10:17:52 xenserver8 SM: [4975]   File "/opt/xensource/sm/SRCommand.py", line 372, in run
Oct  1 10:17:52 xenserver8 SM: [4975]     return self._run_locked(sr)
Oct  1 10:17:52 xenserver8 SM: [4975]   File "/opt/xensource/sm/SRCommand.py", line 159, in _run_locked
Oct  1 10:17:52 xenserver8 SM: [4975]     rv = self._run(sr, target)
Oct  1 10:17:52 xenserver8 SM: [4975]   File "/opt/xensource/sm/SRCommand.py", line 323, in _run
Oct  1 10:17:52 xenserver8 SM: [4975]     return sr.create(self.params['sr_uuid'], long(self.params['args'][0]))
Oct  1 10:17:52 xenserver8 SM: [4975]   File "/opt/xensource/sm/NFSSR", line 216, in create
Oct  1 10:17:52 xenserver8 SM: [4975]     raise exn
Oct  1 10:17:52 xenserver8 SM: [4975]
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                                      • R Offline
                                        r1 XCP-ng Team
                                        last edited by

                                        Looks like variable declaration issue. I had it working for XCP-NG 7.6... Give me some time to fix this and make it working for 8.0

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                                        • J Offline
                                          jmccoy555 @r1
                                          last edited by jmccoy555

                                          @r1 Is this still in development; would like to get it working with 8.1?

                                          Manually mounting the CephFS works, but the patch fails, probably not surprisingly; or is a GlusterFS approach a better option?

                                          With Ceph Octopus and the cephadm approach setting Ceph up is really easy, so maybe this will become a more popular feature....?

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                                          • R Offline
                                            r1 XCP-ng Team
                                            last edited by

                                            @jmccoy555 I did not continue this. Will definitely rejuvenate it once 8.1 is released. Hopefully next week.

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