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    CEPH FS Storage Driver

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    • borzelB
      borzel XCP-ng Center Team @scboley
      last edited by borzel

      @scboley said in CEPH FS Storage Driver:

      and not good to upset the masses

      this is the reason I worked at night the last two weeks at work 🌃

      1 Reply Last reply Reply Quote 0
      • S
        scboley @r1
        last edited by scboley

        @r1 sudo mount -t ceph sanadmin.nams.net:6789: / /mnt/nfsmigrate

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        • R
          r1 XCP-ng Team
          last edited by

          @scboley nice. It should work straight as mentioned in 2nd post of this thread.

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          • M
            maxcuttins
            last edited by maxcuttins

            Ok,

            i start my adventure but I get soon an issue.

            This command install the nautilus release Repo:

            yum install centos-release-ceph-nautilus --enablerepo=extras

            and worked fine.

            This one should installed ceph-common but cannot find many dependencies

            yum install ceph-common
Loaded plugins: fastestmirror
centos-ceph-nautilus                                                                                                                                | 2.9 kB  00:00:00
centos-ceph-nautilus/7/x86_64/primary_db                                                                                                            |  62 kB  00:00:00
Loading mirror speeds from cached hostfile
 * centos-ceph-nautilus: mirrors.prometeus.net
Resolving Dependencies
--> Running transaction check
---> Package ceph-common.x86_64 2:14.2.0-1.el7 will be installed
--> Processing Dependency: python-rgw = 2:14.2.0-1.el7 for package: 2:ceph-common-14.2.0-1.el7.x86_64

... [CUT] ...

Error: Package: 2:librgw2-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: libibverbs.so.1()(64bit)
Error: Package: leveldb-1.12.0-5.el7.1.x86_64 (centos-ceph-nautilus)
           Requires: libsnappy.so.1()(64bit)
Error: Package: 2:libcephfs2-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: librdmacm.so.1()(64bit)
Error: Package: 2:ceph-common-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: liblz4.so.1()(64bit)
Error: Package: 2:libradosstriper1-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: libibverbs.so.1()(64bit)
Error: Package: 2:librbd1-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: libibverbs.so.1()(64bit)
Error: Package: 2:ceph-common-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: python-requests
Error: Package: 2:librgw2-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: librdmacm.so.1()(64bit)
Error: Package: 2:librados2-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: librdmacm.so.1()(64bit)
Error: Package: 2:ceph-common-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: libibverbs.so.1()(64bit)
Error: Package: 2:libcephfs2-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: libibverbs.so.1()(64bit)
Error: Package: 2:ceph-common-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: libfuse.so.2()(64bit)
Error: Package: 2:ceph-common-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: libsnappy.so.1()(64bit)
Error: Package: 2:librbd1-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: librdmacm.so.1()(64bit)
Error: Package: 2:librados2-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: librdmacm.so.1(RDMACM_1.0)(64bit)
Error: Package: 2:ceph-common-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: librabbitmq.so.4()(64bit)
Error: Package: 2:libradosstriper1-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: librdmacm.so.1()(64bit)
Error: Package: 2:librgw2-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: librabbitmq.so.4()(64bit)
Error: Package: 2:librados2-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: libibverbs.so.1()(64bit)
Error: Package: 2:ceph-common-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: libtcmalloc.so.4()(64bit)
Error: Package: 2:librados2-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: libibverbs.so.1(IBVERBS_1.0)(64bit)
Error: Package: 2:librados2-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: libibverbs.so.1(IBVERBS_1.1)(64bit)
Error: Package: 2:ceph-common-14.2.0-1.el7.x86_64 (centos-ceph-nautilus)
           Requires: librdmacm.so.1()(64bit)
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

            Of course I'm using a higher version of Ceph than your post.
            Any hint anyway?

            M 1 Reply Last reply Reply Quote 0
            • M
              maxcuttins @maxcuttins
              last edited by

              Ok, solved.
              Of course Ceph need Epel and Base repo enabled.

              This worked:

              yum install epel-release -y --enablerepo=extras
yum install ceph-common --enablerepo='centos-ceph-nautilus' --enablerepo='epel' --enablerepo='base'
              1 Reply Last reply Reply Quote 0
              • M
                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.
                1 Reply Last reply Reply Quote 0
                • R
                  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
                    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
                      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
                        Rainer @olivierlambert
                        last edited by

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

                        1 Reply Last reply Reply Quote 1
                        • R
                          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?

                          1 Reply Last reply Reply Quote 0
                          • R
                            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

                            1 Reply Last reply Reply Quote 0
                            • R
                              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.

                              1 Reply Last reply Reply Quote 0
                              • R
                                r1 XCP-ng Team
                                last edited by

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

                                1 Reply Last reply Reply Quote 0
                                • R
                                  r1 XCP-ng Team
                                  last edited by

                                  Updated new patch for XCP-NG 8.

                                  1 Reply Last reply Reply Quote 0
                                  • olivierlambertO
                                    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.

                                    1 Reply Last reply Reply Quote 0
                                    • R
                                      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

                                      1 Reply Last reply Reply Quote 0
                                      • R
                                        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
                                          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

                                          1 Reply Last reply Reply Quote 0
                                          • R
                                            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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