The mount failure is probably related to glusterfs. There are glusterfs logs on the host that 
can give more info on this error. 
Oh duh, sorry forgot to check :-&

"failed to fetch volume file"

[2019-01-25 13:47:03.560677] I [MSGID: 100030] [glusterfsd.c:2691:main] 0-/usr/sbin/glusterfs: Started running /usr/sbin/glusterfs version 5.2 (args: /usr/sbin/glusterfs --process-name fuse --volfile-server=*.*.*.* --volfile-server=*.*.*.* --volfile-server=*.*.*.* --volfile-id=ssd5 /rhev/data-center/mnt/glusterSD/*.*.*.*:ssd5)
[2019-01-25 13:47:03.571819] I [MSGID: 101190] [event-epoll.c:622:event_dispatch_epoll_worker] 0-epoll: Started thread with index 1
[2019-01-25 14:02:45.067440] I [glusterfsd-mgmt.c:2424:mgmt_rpc_notify] 0-glusterfsd-mgmt: disconnected from remote-host: *.*.*.*
[2019-01-25 14:02:45.067500] I [glusterfsd-mgmt.c:2464:mgmt_rpc_notify] 0-glusterfsd-mgmt: connecting to next volfile server *.*.*.*
[2019-01-25 14:02:45.069678] E [rpc-clnt.c:346:saved_frames_unwind] (--> /lib64/libglusterfs.so.0(_gf_log_callingfn+0x13b)[0x7f2b0b7f4f1b] (--> /lib64/libgfrpc.so.0(+0xce11)[0x7f2b0b5bde11] (--> /lib64/libgfrpc.so.0(+0xcf2e)[0x7f2b0b5bdf2e] (--> /lib64/libgfrpc.so.0(rpc_clnt_connection_cleanup+0x91)[0x7f2b0b5bf531] (--> /lib64/libgfrpc.so.0(+0xf0d8)[0x7f2b0b5c00d8] ))))) 0-glusterfs: forced unwinding frame type(GlusterFS Handshake) op(GETSPEC(2)) called at 2019-01-25 13:47:03.572632 (xid=0x2)
[2019-01-25 14:02:45.069697] E [glusterfsd-mgmt.c:2136:mgmt_getspec_cbk] 0-mgmt: failed to fetch volume file (key:ssd5)
[2019-01-25 14:02:45.069725] W [glusterfsd.c:1481:cleanup_and_exit] (-->/lib64/libgfrpc.so.0(+0xce32) [0x7f2b0b5bde32] -->/usr/sbin/glusterfs(mgmt_getspec_cbk+0x841) [0x5651101b7231] -->/usr/sbin/glusterfs(cleanup_and_exit+0x6b) [0x5651101afbbb] ) 0-: received signum (0), shutting down
[2019-01-25 14:02:45.069749] I [fuse-bridge.c:5897:fini] 0-fuse: Unmounting '/rhev/data-center/mnt/glusterSD/*.*.*.*:ssd5'.
[2019-01-25 14:02:45.078949] I [fuse-bridge.c:5902:fini] 0-fuse: Closing fuse connection to '/rhev/data-center/mnt/glusterSD/*.*.*.*:ssd5'.
[2019-01-25 14:02:45.079035] W [glusterfsd.c:1481:cleanup_and_exit] (-->/lib64/libpthread.so.0(+0x7dd5) [0x7f2b0a656dd5] -->/usr/sbin/glusterfs(glusterfs_sigwaiter+0xe5) [0x5651101afd45] -->/usr/sbin/glusterfs(cleanup_and_exit+0x6b) [0x5651101afbbb] ) 0-: received signum (15), shutting down

On 1/25/19 2:55 PM, Nir Soffer wrote:
On Fri, Jan 25, 2019 at 3:18 PM Jorick Astrego <jorick@netbulae.eu> wrote:

Hi,

We're having problems mounting the preexisting 3.12 glusterfs storage domains in ovirt node ng 4.3.0 rc2.

Getting

There are no iptables blocks on the storage network, the ip's are pingable bothe ways. I can telnet to the glusterfs ports and I see no messages in the logs of the glusterfs servers.

When I try the mount command manually it hangs for ever:

/usr/bin/mount -t glusterfs -o backup-volfile-servers=*.*.*.*:*.*.*.* *.*.*.*:/sdd8 /mnt/temp

I haven't submitted a bug yet....

from supervdsm.log

MainProcess|jsonrpc/2::DEBUG::2019-01-25 13:42:45,282::supervdsm_server::100::SuperVdsm.ServerCallback::(wrapper) call volumeInfo with (u'sdd8', u'*.*.*.*') {}
MainProcess|jsonrpc/2::DEBUG::2019-01-25 13:42:45,282::commands::198::root::(execCmd) /usr/bin/taskset --cpu-list 0-63 /usr/sbin/gluster --mode=script volume info --remote-host=*.*.*.* sdd8 --xml (cwd None)
MainProcess|jsonrpc/2::DEBUG::2019-01-25 13:44:45,399::commands::219::root::(execCmd) FAILED: <err> = ''; <rc> = 1
MainProcess|jsonrpc/2::DEBUG::2019-01-25 13:44:45,399::logutils::319::root::(_report_stats) ThreadedHandler is ok in the last 120 seconds (max pending: 2)


This looks like
https://bugzilla.redhat.com/show_bug.cgi?id=1666123#c18

We should see "ThreadedHandler is ok" every 60 seconds when using debug log level.

Looks like your entire supervdsmd process was hang for 120 seconds.
 

MainProcess|jsonrpc/2::ERROR::2019-01-25 13:44:45,399::supervdsm_server::104::SuperVdsm.ServerCallback::(wrapper) Error in volumeInfo
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/vdsm/supervdsm_server.py", line 102, in wrapper
    res = func(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/gluster/cli.py", line 529, in volumeInfo
    xmltree = _execGlusterXml(command)
  File "/usr/lib/python2.7/site-packages/vdsm/gluster/cli.py", line 131, in _execGlusterXml
    return _getTree(rc, out, err)
  File "/usr/lib/python2.7/site-packages/vdsm/gluster/cli.py", line 112, in _getTree
    raise ge.GlusterCmdExecFailedException(rc, out, err)
GlusterCmdExecFailedException: Command execution failed
error: E
r
r
o
r
 
:
 
R
e
q
u
e
s
t
 
t
i
m
e
d
 
o
u
t

Looks like side effect of

GlusterException assumes that it accept list of lines, but we started to raise
strings. The class should be fixed to handle strings.



return code: 1
MainProcess|jsonrpc/2::DEBUG::2019-01-25 13:44:45,400::supervdsm_server::100::SuperVdsm.ServerCallback::(wrapper) call mount with (<vdsm.supervdsm_server._SuperVdsm object at 0x7f6eb8d0a2d0>, u'*.*.*.*:/sdd8', u'/rhev/data-center/mnt/glusterSD/*.*.*.*:_sdd8') {'vfstype': u'glusterfs', 'mntOpts': u'backup-volfile-servers=*.*.*.*:*.*.*.*', 'cgroup': 'vdsm-glusterfs'}
MainProcess|jsonrpc/2::DEBUG::2019-01-25 13:44:45,400::commands::198::root::(execCmd) /usr/bin/taskset --cpu-list 0-63 /usr/bin/systemd-run --scope --slice=vdsm-glusterfs /usr/bin/mount -t glusterfs -o backup-volfile-servers=*.*.*.*:*.*.*.* *.*.*.*:/sdd8 /rhev/data-center/mnt/glusterSD/*.*.*.*:_sdd8 (cwd None)
MainProcess|jsonrpc/0::DEBUG::2019-01-25 13:45:02,884::commands::219::root::(execCmd) FAILED: <err> = 'Running scope as unit run-38676.scope.\nMount failed. Please check the log file for more details.\n'; <rc> = 1
MainProcess|jsonrpc/0::ERROR::2019-01-25 13:45:02,884::supervdsm_server::104::SuperVdsm.ServerCallback::(wrapper) Error in mount
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/vdsm/supervdsm_server.py", line 102, in wrapper
    res = func(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/supervdsm_server.py", line 144, in mount
    cgroup=cgroup)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/mount.py", line 277, in _mount
    _runcmd(cmd)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/mount.py", line 305, in _runcmd
    raise MountError(rc, b";".join((out, err)))
MountError: (1, ';Running scope as unit run-38676.scope.\nMount failed. Please check the log file for more details.\n')


The mount failure is probably related to glusterfs. There are glusterfs logs on the host that 
can give more info on this error. 

MainProcess|jsonrpc/0::DEBUG::2019-01-25 13:45:02,894::supervdsm_server::100::SuperVdsm.ServerCallback::(wrapper) call volumeInfo with (u'ssd9', u'*.*.*.*') {}
MainProcess|jsonrpc/0::DEBUG::2019-01-25 13:45:02,894::commands::198::root::(execCmd) /usr/bin/taskset --cpu-list 0-63 /usr/sbin/gluster --mode=script volume info --remote-host=*.*.*.* ssd9 --xml (cwd None)


from vdsm.log

2019-01-25 13:46:03,519+0100 WARN  (vdsm.Scheduler) [Executor] Worker blocked: <Worker name=jsonrpc/2 running <Task <JsonRpcTask {'params': {u'connectionParams': [{u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'6b6b7899-c82b-4417-b453-0b3b0ac11deb', u'connection': u'*.*.*.*:ssd4', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'b036005a-d44d-4689-a8c3-13e1bbf55af7', u'connection': u'*.*.*.*:ssd5', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'40d191b0-b7f8-48f9-bf6f-327275f51fef', u'connection': u'*.*.*.*:ssd6', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'26fbd2d6-6f25-4520-ab7f-15e9001f07b9', u'connection': u'*.*.*.*:/hdd2', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'f11fed97-513a-4a10-b85c-2afe68f42608', u'connection': u'*.*.*.*:/ssd3', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'f20b8691-528e-4e38-89ad-1e27684dee8b', u'connection': u'*.*.*.*:/sdd8', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'188e71dc-3d81-43d3-b930-238a4c6711e6', u'connection': u'*.*.*.*:/ssd9', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}], u'storagepoolID': u'00000001-0001-0001-0001-000000000043', u'domainType': 7}, 'jsonrpc': '2.0', 'method': u'StoragePool.connectStorageServer', 'id': u'581e2ad3-0682-4d44-95b4-bdc088b45f66'} at 0x7f9be815c850> timeout=60, duration=1260.00 at 0x7f9be815ca10> task#=98 at 0x7f9be83bb750>, traceback:
File: "/usr/lib64/python2.7/threading.py", line 785, in __bootstrap
  self.__bootstrap_inner()
File: "/usr/lib64/python2.7/threading.py", line 812, in __bootstrap_inner
  self.run()
File: "/usr/lib64/python2.7/threading.py", line 765, in run
  self.__target(*self.__args, **self.__kwargs)
File: "/usr/lib/python2.7/site-packages/vdsm/common/concurrent.py", line 195, in run
  ret = func(*args, **kwargs)
File: "/usr/lib/python2.7/site-packages/vdsm/executor.py", line 301, in _run
  self._execute_task()
File: "/usr/lib/python2.7/site-packages/vdsm/executor.py", line 315, in _execute_task
  task()
File: "/usr/lib/python2.7/site-packages/vdsm/executor.py", line 391, in __call__
  self._callable()
File: "/usr/lib/python2.7/site-packages/yajsonrpc/__init__.py", line 262, in __call__
  self._handler(self._ctx, self._req)
File: "/usr/lib/python2.7/site-packages/yajsonrpc/__init__.py", line 305, in _serveRequest
  response = self._handle_request(req, ctx)
File: "/usr/lib/python2.7/site-packages/yajsonrpc/__init__.py", line 345, in _handle_request
  res = method(**params)
File: "/usr/lib/python2.7/site-packages/vdsm/rpc/Bridge.py", line 194, in _dynamicMethod
  result = fn(*methodArgs)
File: "/usr/lib/python2.7/site-packages/vdsm/API.py", line 1103, in connectStorageServer
  connectionParams)
File: "/usr/lib/python2.7/site-packages/vdsm/storage/dispatcher.py", line 72, in wrapper
  result = ctask.prepare(func, *args, **kwargs)
File: "/usr/lib/python2.7/site-packages/vdsm/storage/task.py", line 108, in wrapper
  return m(self, *a, **kw)
File: "/usr/lib/python2.7/site-packages/vdsm/storage/task.py", line 1179, in prepare
  result = self._run(func, *args, **kwargs)
File: "/usr/lib/python2.7/site-packages/vdsm/storage/task.py", line 882, in _run
  return fn(*args, **kargs)
File: "<string>", line 2, in connectStorageServer
File: "/usr/lib/python2.7/site-packages/vdsm/common/api.py", line 50, in method
  ret = func(*args, **kwargs)
File: "/usr/lib/python2.7/site-packages/vdsm/storage/hsm.py", line 2410, in connectStorageServer
  conObj.connect()

from messages:

Jan 25 13:49:07 node9 vdsm[31968]: WARN Worker blocked: <Worker name=jsonrpc/3 running <Task <JsonRpcTask {'params': {u'connectionParams': [{u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'6b6b7899-c82b-4417-b453-0b3b0ac11deb', u'connection': u'*.*.*.*:ssd4', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'b036005a-d44d-4689-a8c3-13e1bbf55af7', u'connection': u'*.*.*.*:ssd5', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'40d191b0-b7f8-48f9-bf6f-327275f51fef', u'connection': u'*.*.*.*:ssd6', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'26fbd2d6-6f25-4520-ab7f-15e9001f07b9', u'connection': u'*.*.*.*:/hdd2', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'f11fed97-513a-4a10-b85c-2afe68f42608', u'connection': u'*.*.*.*:/ssd3', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'f20b8691-528e-4e38-89ad-1e27684dee8b', u'connection': u'*.*.*.*:/sdd8', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}, {u'mnt_options': u'backup-volfile-servers=*.*.*.*:*.*.*.*', u'id': u'188e71dc-3d81-43d3-b930-238a4c6711e6', u'connection': u'*.*.*.*:/ssd9', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'ipv6_enabled': u'false', u'vfs_type': u'glusterfs', u'password': '********', u'port': u''}], u'storagepoolID': u'00000001-0001-0001-0001-000000000043', u'domainType': 7}, 'jsonrpc': '2.0', 'method': u'StoragePool.connectStorageServer', 'id': u'918f4d06-ca89-4ec0-a396-3407f1bdb8f9'} at 0x7f9be82ff250> timeout=60, duration=840.00 at 0x7f9be82ffa50> task#=93 at 0x7f9be83bba10>, traceback:#012File: "/usr/lib64/python2.7/threading.py", line 785, in __bootstrap#012  self.__bootstrap_inner()#012File: "/usr/lib64/python2.7/threading.py", line 812, in __bootstrap_inner#012  self.run()#012File: "/usr/lib64/python2.7/threading.py", line 765, in run#012  self.__target(*self.__args, **self.__kwargs)#012File: "/usr/lib/python2.7/site-packages/vdsm/common/concurrent.py", line 195, in run#012  ret = func(*args, **kwargs)#012File: "/usr/lib/python2.7/site-packages/vdsm/executor.py", line 301, in _run#012  self._execute_task()#012File: "/usr/lib/python2.7/site-packages/vdsm/executor.py", line 315, in _execute_task#012  task()#012File: "/usr/lib/python2.7/site-packages/vdsm/executor.py", line 391, in __call__#012  self._callable()#012File: "/usr/lib/python2.7/site-packages/yajsonrpc/__init__.py", line 262, in __call__#012  self._handler(self._ctx, self._req)#012File: "/usr/lib/python2.7/site-packages/yajsonrpc/__init__.py", line 305, in _serveRequest#012  response = self._handle_request(req, ctx)#012File: "/usr/lib/python2.7/site-packages/yajsonrpc/__init__.py", line 345, in _handle_request#012  res = method(**params)#012File: "/usr/lib/python2.7/site-packages/vdsm/rpc/Bridge.py", line 194, in _dynamicMethod#012  result = fn(*methodArgs)#012File: "/usr/lib/python2.7/site-packages/vdsm/API.py", line 1103, in connectStorageServer#012  connectionParams)#012File: "/usr/lib/python2.7/site-packages/vdsm/storage/dispatcher.py", line 72, in wrapper#012  result = ctask.prepare(func, *args, **kwargs)#012File: "/usr/lib/python2.7/site-packages/vdsm/storage/task.py", line 108, in wrapper#012  return m(self, *a, **kw)#012File: "/usr/lib/python2.7/site-packages/vdsm/storage/task.py", line 1179, in prepare#012  result = self._run(func, *args, **kwargs)#012File: "/usr/lib/python2.7/site-packages/vdsm/storage/task.py", line 882, in _run#012  return fn(*args, **kargs)#012File: "<string>", line 2, in connectStorageServer#012File: "/usr/lib/python2.7/site-packages/vdsm/common/api.py", line 50, in method#012  ret = func(*args, **kwargs)#012File: "/usr/lib/python2.7/site-packages/vdsm/storage/hsm.py", line 2410, in connectStorageServer#012  conObj.connect()#012File: "/usr/lib/python2.7/site-packages/vdsm/storage/storageServer.py", line 172, in connect#012  self._mount.mount(self.options, self._vfsType, cgroup=self.CGROUP)#012File: "/usr/lib/python2.7/site-packages/vdsm/storage/mount.py", line 207, in mount#012  cgroup=cgroup)#012File: "/usr/lib/python2.7/site-packages/vdsm/common/supervdsm.py", line 56, in __call__#012  return callMethod()#012File: "/usr/lib/python2.7/site-packages/vdsm/common/supervdsm.py", line 54, in <lambda>#012  **kwargs)#012File: "<string>", line 2, in mount#012File: "/usr/lib64/python2.7/multiprocessing/managers.py", line 759, in _callmethod#012  kind, result = conn.recv()

This matches the theory of blocked supervdsmd.

Met vriendelijke groet, With kind regards,

Jorick Astrego

Netbulae Virtualization Experts
Tel: 053 20 30 270 info@netbulae.eu Staalsteden 4-3A KvK 08198180
Fax: 053 20 30 271 www.netbulae.eu 7547 TA Enschede BTW NL821234584B01


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Met vriendelijke groet, With kind regards,

Jorick Astrego

Netbulae Virtualization Experts
Tel: 053 20 30 270 info@netbulae.eu Staalsteden 4-3A KvK 08198180
Fax: 053 20 30 271 www.netbulae.eu 7547 TA Enschede BTW NL821234584B01