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    CEPH FS Storage Driver

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    • R
      r1 XCP-ng Team 🚀
      last edited by

      RBD is faster because of client side caching.. Ceph FS does not do it but can be made faster by enabling fscache. Once you have your numbers we will retest with fscache 🙂

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      • S
        scboley
        last edited by scboley

        Ok I have mine in a very restricted environment and do not have any logins defined for the ceph access.
        So saying that if I don't put any user authentication in the options will it still work? I had issues with your plugin around that same problem.
        I'm also still on 7.5 will that be an issue and my ceph is mimic.

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

          Can you show your mount command by doing some example mount? e.g. #mount.ceph add1:remotepath localpath /mnt? Does this work as it is?

          The advanced options are necessary for now to discriminate between NFS and Ceph. But I think once I know your working command, I will be able to generalize it.

          BTW - I hope you installed the ceph.ko as mentioned in earlier steps.

          S 2 Replies Last reply Reply Quote 0
          • S
            scboley @r1
            last edited by

            @r1 I'm in planning phase right now since these boxes are actually production and I'll have to figure how to do this without it being a possible danger to my production enviro. The box I have that needs it the worst I still haven't upgraded from xenserver 6.5. I need to setup a fully dev box for this. I've got plans for upgrading my infrastructure for the ceph and virtual public network that this would help tremendously.

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            • R
              r1 XCP-ng Team 🚀
              last edited by

              Sadly XS 6.5 uses 3.10 kernel which does not support Ceph outright and you would most likely to update this host to a recent XCP version.

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

                @r1 Yeah I just haven't had time yet since it has one of our heaviest used virtuals on it and not good to upset the masses lol.

                borzelB 1 Reply Last reply Reply Quote 0
                • 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 🌃

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                  • 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'
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                          • 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?

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                                      • 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

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                                        • 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.

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