Created attachment 958639 [details]
/var/log from both hosts

+++ This bug was initially created as a clone of Bug #1165215 +++

Description of problem:
I tried to add a new RHEL7 host to a DC where I already had a host with RHEL6.6 OS installed. In the DC I had a gluster domain which was created using the RHEL6.6 host. The host wasn't able to connect to the storage pool due to a mount failure to the gluster domain.

Version-Release number of selected component (if applicable):

rhev 3.4.4 av13.1

On the RHEL7 host:
vdsm-4.14.18-2.el7ev.x86_64
libvirt-1.1.1-29.el7_0.3.x86_64
samba-vfs-glusterfs-4.1.1-37.el7_0.x86_64
glusterfs-debuginfo-3.4.0.65rhs-1.el7_0.x86_64
glusterfs-libs-3.4.0.65rhs-1.el7_0.x86_64
glusterfs-3.4.0.65rhs-1.el7_0.x86_64
glusterfs-fuse-3.4.0.65rhs-1.el7_0.x86_64
glusterfs-api-devel-3.4.0.65rhs-1.el7_0.x86_64
glusterfs-devel-3.4.0.65rhs-1.el7_0.x86_64
glusterfs-api-3.4.0.65rhs-1.el7_0.x86_64
glusterfs-rdma-3.4.0.65rhs-1.el7_0.x86_64
qemu-kvm-rhev-1.5.3-60.el7_0.10.x86_64
sanlock-3.1.0-2.el7.x86_64

On the RHEL6.6 host:
vdsm-4.14.18-2.el6ev.x86_64
libvirt-0.10.2-46.el6_6.1.x86_64
sanlock-2.8-1.el6.x86_64
qemu-kvm-rhev-0.12.1.2-2.448.el6.x86_64
glusterfs-api-devel-3.6.0.28-2.el6.x86_64
glusterfs-cli-3.6.0.28-2.el6.x86_64
glusterfs-libs-3.6.0.28-2.el6.x86_64
glusterfs-api-3.6.0.28-2.el6.x86_64
glusterfs-devel-3.6.0.28-2.el6.x86_64
samba-glusterfs-3.6.23-12.el6.x86_64
glusterfs-rdma-3.6.0.28-2.el6.x86_64
glusterfs-debuginfo-3.4.0.57rhs-1.el6_5.x86_64
glusterfs-3.6.0.28-2.el6.x86_64
glusterfs-fuse-3.6.0.28-2.el6.x86_64


How reproducible:
Always

Steps to Reproduce:
Have 2 hosts: one with RHEL6.6 and one with RHEL7. Install all gluster packages mentioned above
1. Create a gluster domain using a RHEL6.6 host 

Thread-13::DEBUG::2014-11-18 09:25:58,924::mount::202::Storage.Misc.excCmd::(_runcmd) '/usr/bin/sudo -n /bin/mount -t glusterfs 10.35.160.202:/elad /rhev/data-center/mnt/glusterSD/10.35.160.202:_elad' (cwd None)

2. Add a new cluster to the DC and add a RHEL7 host to it
3.

Actual results:
Host is unable to connect to the storage pool:

vdsm.log:

Thread-14::INFO::2014-11-18 15:02:17,746::logUtils::44::dispatcher::(wrapper) Run and protect: connectStorageServer(domType=7, spUUID='00000002-0002-0002-0002-000000000316', conList=[{'port': '', 'connection': '10
.35.160.202:/elad', 'iqn': '', 'user': '', 'tpgt': '1', 'vfs_type': 'glusterfs', 'password': '******', 'id': 'f26f92dd-6cf5-4353-b516-1c0b31e44605'}], options=None)
Thread-14::DEBUG::2014-11-18 15:02:17,772::mount::202::Storage.Misc.excCmd::(_runcmd) '/usr/bin/sudo -n /usr/bin/mount -t glusterfs 10.35.160.202:/elad /rhev/data-center/mnt/glusterSD/10.35.160.202:_elad' (cwd Non
e)
Thread-14::ERROR::2014-11-18 15:02:17,811::storageServer::209::StorageServer.MountConnection::(connect) Mount failed: (32, ";mount: unknown filesystem type 'glusterfs'\n")
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/storageServer.py", line 207, in connect
    self._mount.mount(self.options, self._vfsType)
  File "/usr/share/vdsm/storage/mount.py", line 198, in mount
    return self._runcmd(cmd, timeout)
  File "/usr/share/vdsm/storage/mount.py", line 214, in _runcmd
    raise MountError(rc, ";".join((out, err)))
MountError: (32, ";mount: unknown filesystem type 'glusterfs'\n")
Thread-14::ERROR::2014-11-18 15:02:17,812::hsm::2389::Storage.HSM::(connectStorageServer) Could not connect to storageServer
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/hsm.py", line 2386, in connectStorageServer
    conObj.connect()
  File "/usr/share/vdsm/storage/storageServer.py", line 215, in connect
    raise e
MountError: (32, ";mount: unknown filesystem type 'glusterfs'\n")


engine.log:

2014-11-18 16:15:02,499 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (DefaultQuartzScheduler_Worker-8) [659b4d39] Correlation ID: null, Call Stack: null, Custom Event ID: -1, Messag
e: The error message for connection 10.35.160.202:/elad returned by VDSM was: Problem while trying to mount target
2014-11-18 16:15:02,500 ERROR [org.ovirt.engine.core.bll.storage.GLUSTERFSStorageHelper] (DefaultQuartzScheduler_Worker-8) [659b4d39] The connection with details 10.35.160.202:/elad failed because of error code 47
7 and error message is: problem while trying to mount target



The problem occurs only on RHEL7 hosts.
Mounting the gluster voume manually from the host succeeds:


Expected results:
Connecting a RHEL7 host to a gluster domain should succeed if it was created by a RHEL6 host

Additional info: 
/var/log from both hosts
engine.log