Hi, I realised that gluster 3.7.8 was released for GA. So I updated
manually using "yum -y install glusterfs*" gluster get's updated normally,
but  unfortunately things stopped to work completely.
ovirt_hosted_engine_ha was not able to connect to my gluster storage domain
(as you can see below). I'm not using ovirt + gluster in hyperconverged
way. I have 3 external gluster hosts.

As a workaround I've executed "*yum* downgrade glusterfs*" and after doing
this ovirt started to work again...but as a collateral effect now I can't
migrate my vm's anymore.  On the vdsm logs I can see the following errors
when trying to manually migrate a any VM.... Anyone knows how to fix it?

Thread-66055::DEBUG::2016-02-17
11:05:57,497::migration::453::virt.vm::(stop)
vmId=`05681896-a76a-4ae1-879e-8fe5d28634e1`::stopping migration downtime
thread

Thread-66055::ERROR::2016-02-17
11:05:57,497::migration::208::virt.vm::(_recover)
vmId=`05681896-a76a-4ae1-879e-8fe5d28634e1`::unable to connect to server at
'kvm2.brightsquid.com:49152': No route to host

Thread-66055::DEBUG::2016-02-17
11:05:57,497::stompreactor::389::jsonrpc.AsyncoreClient::(send) Sending
response

Thread-66056::DEBUG::2016-02-17
11:05:57,498::migration::450::virt.vm::(run)
vmId=`05681896-a76a-4ae1-879e-8fe5d28634e1`::migration downtime thread
exiting

Thread-66055::DEBUG::2016-02-17
11:05:57,540::__init__::206::jsonrpc.Notification::(emit) Sending event
{"params": {"notify_time": 4327804740,
"05681896-a76a-4ae1-879e-8fe5d28634e1": {"status": "Migration Source"}},
"jsonrpc": "2.0", "method":
"|virt|VM_status|05681896-a76a-4ae1-879e-8fe5d28634e1"}

Thread-66055::ERROR::2016-02-17
11:05:57,541::migration::310::virt.vm::(run)
vmId=`05681896-a76a-4ae1-879e-8fe5d28634e1`::Failed to migrate

Traceback (most recent call last):

  File "/usr/share/vdsm/virt/migration.py", line 294, in run

    self._startUnderlyingMigration(time.time())

  File "/usr/share/vdsm/virt/migration.py", line 364, in
_startUnderlyingMigration

    self._perform_migration(duri, muri)

  File "/usr/share/vdsm/virt/migration.py", line 403, in _perform_migration

    self._vm._dom.migrateToURI3(duri, params, flags)

  File "/usr/share/vdsm/virt/virdomain.py", line 68, in f

    ret = attr(*args, **kwargs)

  File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line
124, in wrapper

    ret = f(*args, **kwargs)

  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1836, in
migrateToURI3

    if ret == -1: raise libvirtError ('virDomainMigrateToURI3() failed',
dom=self)

libvirtError: unable to connect to server at 'kvm2.brightsquid.com:49152':
No route to host

Thread-68::DEBUG::2016-02-17
11:05:57,652::fileSD::173::Storage.Misc.excCmd::(getReadDelay)
/usr/bin/taskset --cpu-list 0-39 /usr/bin/dd
if=/rhev/data-center/mnt/gluster2.brightsquid.com:_home_export_iso/61827b7b-e255-44f5-a791-482a144be29f/dom_md/metadata
iflag=direct of=/dev/null bs=4096 count=1 (cwd None)

Thread-68::DEBUG::2016-02-17
11:05:57,662::fileSD::173::Storage.Misc.excCmd::(getReadDelay) SUCCESS:
<err> = '0+1 records in\n0+1 records out\n341 bytes (341 B) copied,
0.000713967 s, 478 kB/s\n'; <rc> = 0










Issue to connect to the gluster storage.
*****************************************************************************
Feb 17 01:25:40 kvm2 ovirt-ha-agent:
INFO:ovirt_hosted_engine_ha.lib.storage_server.StorageServer:Connecting
storage server
Feb 17 01:25:40 kvm2 ovirt-ha-agent:
INFO:ovirt_hosted_engine_ha.lib.storage_server.StorageServer:Connecting
storage server
Feb 17 01:25:40 kvm2 journal: ovirt-ha-agent
ovirt_hosted_engine_ha.agent.agent.Agent ERROR Error: 'Connection to
storage server failed' - trying to restart agent
Feb 17 01:25:40 kvm2 ovirt-ha-agent:
ERROR:ovirt_hosted_engine_ha.agent.agent.Agent:Error: 'Connection to
storage server failed' - trying to restart agent
Feb 17 01:25:41 kvm2 ovirt-ha-broker:
INFO:ovirt_hosted_engine_ha.broker.listener.ConnectionHandler:Connection
established
Feb 17 01:25:41 kvm2 journal: ovirt-ha-broker
ovirt_hosted_engine_ha.broker.listener.ConnectionHandler ERROR Error
handling request, data: 'set-storage-domain FilesystemBackend
dom_type=glusterfs
sd_uuid=7d376952-312b-4539-b809-a8fa740f7883'#012Traceback (most recent
call last):#012  File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/broker/listener.py",
line 166, in handle#012    data)#012  File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/broker/listener.py",
line 299, in _dispatch#012    .set_storage_domain(client, sd_type,
**options)#012  File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/broker/storage_broker.py",
line 66, in set_storage_domain#012    self._backends[client].connect()#012
 File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/storage_backends.py",
line 456, in connect#012    self._dom_type)#012  File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/storage_backends.py",
line 108, in get_domain_path#012    " in {1}".format(sd_uuid,
parent))#012BackendFailureException: path to storage domain
7d376952-312b-4539-b809-a8fa740f7883 not found in
/rhev/data-center/mnt/glusterSD
Feb 17 01:25:41 kvm2 ovirt-ha-broker:
ERROR:ovirt_hosted_engine_ha.broker.listener.ConnectionHandler:Error
handling request, data: 'set-storage-domain FilesystemBackend
dom_type=glusterfs sd_uuid=7d376952-312b-4539-b809-a8fa740f7883'
Feb 17 01:25:41 kvm2 ovirt-ha-broker: Traceback (most recent call last):
Feb 17 01:25:41 kvm2 ovirt-ha-broker: File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/broker/listener.py",
line 166, in handle
Feb 17 01:25:41 kvm2 ovirt-ha-broker: data)
Feb 17 01:25:41 kvm2 ovirt-ha-broker: File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/broker/listener.py",
line 299, in _dispatch
Feb 17 01:25:41 kvm2 ovirt-ha-broker: .set_storage_domain(client, sd_type,
**options)
Feb 17 01:25:41 kvm2 ovirt-ha-broker: File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/broker/storage_broker.py",
line 66, in set_storage_domain
Feb 17 01:25:41 kvm2 ovirt-ha-broker: self._backends[client].connect()
Feb 17 01:25:41 kvm2 ovirt-ha-broker: File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/storage_backends.py",
line 456, in connect
Feb 17 01:25:41 kvm2 ovirt-ha-broker: self._dom_type)
Feb 17 01:25:41 kvm2 ovirt-ha-broker: File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/storage_backends.py",
line 108, in get_domain_path
Feb 17 01:25:41 kvm2 ovirt-ha-broker: " in {1}".format(sd_uuid, parent))
Feb 17 01:25:41 kvm2 ovirt-ha-broker: BackendFailureException: path to
storage domain 7d376952-312b-4539-b809-a8fa740f7883 not found in
/rhev/data-center/mnt/glusterSD
Feb 17 01:25:41 kvm2 journal: vdsm vds ERROR failed to retrieve Hosted
Engine HA info#012Traceback (most recent call last):#012  File
"/usr/share/vdsm/API.py", line 1842, in _getHaInfo#012    stats =
instance.get_all_stats()#012  File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py",
line 103, in get_all_stats#012    self._configure_broker_conn(broker)#012
 File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py",
line 180, in _configure_broker_conn#012    dom_type=dom_type)#012  File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/brokerlink.py",
line 176, in set_storage_domain#012    .format(sd_type, options,
e))#012RequestError: Failed to set storage domain FilesystemBackend,
options {'dom_type': 'glusterfs', 'sd_uuid':
'7d376952-312b-4539-b809-a8fa740f7883'}: Request failed: <class
'ovirt_hosted_engine_ha.lib.storage_backends.BackendFailureException'>
Feb 17 01:25:41 kvm2 ovirt-ha-broker:
INFO:ovirt_hosted_engine_ha.broker.listener.ConnectionHandler:Connection
closed
^C
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