11:12 a.m.
On 08 Nov 2016, at 17:52, Martin Sivak <msivak(a)redhat.com>
wrote:
Hi,
mom-vdsm.service contains:
Requires=vdsmd.service
After=vdsmd.service
So when Shira restarted vdsm, mom was also restarted.
[journalctl --unit vdsmd]
Nov 08 18:25:27 RHEL7.2Server systemd[1]: Stopping Virtual Desktop
Server Manager...
Nov 08 18:25:27 RHEL7.2Server vdsmd_init_common.sh[3053]: vdsm:
Running run_final_hooks
Nov 08 18:25:27 RHEL7.2Server systemd[1]: Starting Virtual Desktop
Server Manager...
[journalctl --unit mom-vdsm]
Nov 08 18:17:23 RHEL7.2Server systemd[1]: Starting MOM instance
configured for VDSM purposes...
Nov 08 18:25:16 RHEL7.2Server systemd[1]: Stopping MOM instance
configured for VDSM purposes...
Nov 08 18:25:29 RHEL7.2Server systemd[1]: Started MOM instance
configured for VDSM purposes.
But mom then immediately failed with:
2016-11-08 18:25:08,008 - mom.RPCServer - INFO - ping()
2016-11-08 18:25:08,010 - mom.RPCServer - INFO - getStatistics()
2016-11-08 18:25:17,028 - mom.RPCServer - INFO - RPC Server ending
2016-11-08 18:25:24,705 - mom.GuestManager - INFO - Guest Manager ending
2016-11-08 18:25:26,575 - mom.HostMonitor - INFO - Host Monitor ending
2016-11-08 18:25:29,869 - mom - INFO - MOM starting
2016-11-08 18:25:29,905 - mom.HostMonitor - INFO - Host Monitor starting
2016-11-08 18:25:29,905 - mom - INFO - hypervisor interface vdsmjsonrpcbulk
2016-11-08 18:25:30,029 - mom.vdsmInterface - ERROR - Cannot connect
to VDSM! [Errno 111] Connection refused
2016-11-08 18:25:30,030 - mom - ERROR - Failed to initialize MOM threads
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/mom/__init__.py", line 29, in run
hypervisor_iface = self.get_hypervisor_interface()
File "/usr/lib/python2.7/site-packages/mom/__init__.py", line 217,
in get_hypervisor_interface
return module.instance(self.config)
File
"/usr/lib/python2.7/site-packages/mom/HypervisorInterfaces/vdsmjsonrpcbulkInterface.py",
line 47, in instance
return JsonRpcVdsmBulkInterface()
File
"/usr/lib/python2.7/site-packages/mom/HypervisorInterfaces/vdsmjsonrpcbulkInterface.py",
line 29, in __init__
super(JsonRpcVdsmBulkInterface, self).__init__()
File
"/usr/lib/python2.7/site-packages/mom/HypervisorInterfaces/vdsmjsonrpcInterface.py",
line 43, in __init__
.orRaise(RuntimeError, 'No connection to VDSM.')
File "/usr/lib/python2.7/site-packages/mom/optional.py", line 28, in orRaise
raise exception(*args, **kwargs)
RuntimeError: No connection to VDSM.
The question here is, how much time does VDSM need to allow jsonrpc to
connect and request a ping and list of VMs?
The only correct answer is - when it's ready and responds with success rather than
either not respond at all(as in your case) or with "recovering from crash or
initializing" code
Martin
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