OVS servers restart when iSCSI target restarts

Long story short, I've been working on my new lab at home off and on. Tonight I was working on my lab to get to the point where I would have OVMM as a virtual machine as the dedicated host I have for temporary measures only has two gigs of ram vs the recommended 8 gigs of ram.
More to the point: I was working on the storage portion of my setup and I got my iSCSI target discovered (FreeNAS 9.3) and I was able to build my cluster of OVSs. I noticed earlier that my FreeNAS server had some pending updates and I figured it would be a good idea to perform these updates before I started using the iSCSI storage for active virtual machines. Naturally, when the updates are done on my FreeNAS server, it reboots.
What I don't understand is why both of my OVSs restarted at the same time after the FreeNAS server went down for a reboot. Was there a hidden gotcha? Did I overlook something in the documentation?
A side effect of the unexpected reboot is the fact that my OVS(2) did not come back online with OVMM and I could not ping my management interface for that OVS. I did several Google searches and tried some manual up/downs of the interfaces and tried one effort to manually configure bond0 to an IP address to try and get some sort of response. Needless to say, none of those were good ideas and didn't help. Therefore, I'm re-installing OVS on server 2 now.
If anyone has any ideas as to how I could have fixed OVS(2) I'm more than willing to take notes in case this happens again.
Thank you for any and all help,
Brendan
P.S. If this has any influence with my situation, I am running LACP bonds and all IP addresses are configured on the VLAN interfaces. I have not had any issues configuring my switch and with the exception of OVS(2) not wanting to reply after the unexpected restart I had everything working. An added gotcha is that the storage VLAN interface on OVS(2) continued to reply after the restart.

Hi Brendan,
the situation you encountered is expected for a single-headed iSCSI target. If you present OVM with a LUN - regardless if it's iSCSI or FC, OVM creates an OCFS2 volume on it, when you choose that LUN to be used as a storage repository. This is, since OCFS2 is a cluster-aware file system and thus is the only supported fs to use for a cluster setup. Now, although OVFS2 is really easy to setup - compared to other cluster file systems - it has some mechanics that will cause your nodes to fence (or reboot) in case the node looses "contact" with the OCFS2. Each node writes little keep-alive fragments onto the OCSF2 and if you reboot your iSCSI target, then this will cease and OCFS2 will fence itself, hoping for some minor glitch that may be gone after a reboot.
There are a couple of ways to achieve this with iSCSI, but their resp. setup is not easy, and the hoops to jump through are probably to many for a lab setup. E.g. I am running a two RAC nodes as iSCST targets, which in turn do have high-redundancy disk setup behind them, consiting of 3 seperate storage servers. So, in my setup I am able to survive:
- two storage node failures
- one RAC node failure (which provides the iSCSI target for my OVS)
Regarding your OVS2, as you have already re-installed OVS2, there will be now way, to tell, what went wrong with it, as you'd need access to the console to poke around a bit, while OVS2 is in that situation, where it doesn't respond to pings on it's management interface.
Cheers,
budy

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Message was edited by: Host

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Jan 5 14:57:49 Rigpa kernel[0]: hibernatewriteimage done(0)
Jan 5 14:57:49 Rigpa kernel[0]: sleep
Jan 5 14:57:49 Rigpa kernel[0]: Enabling XMM register save/restore and SSE/SSE2 opcodes
Jan 5 14:57:49 Rigpa kernel[0]: Started CPU 01
Jan 5 14:57:49 Rigpa kernel[0]: IOBluetoothHCIController::restartShutdownWL this is a wake from sleep
Jan 5 14:57:49 Rigpa kernel[0]: System Wake
Jan 5 14:57:52 Rigpa mDNSResponder: Repeated transitions for interface lo0 (127.0.0.1); delaying packets by 5 seconds
Jan 5 14:57:53 Rigpa configd35: posting notification com.apple.system.config.network_change
Jan 5 14:57:53 Rigpa lookupd185: lookupd (version 369.6) starting - Sat Jan 5 14:57:53 2008

Periodic error about contract when try to restart my NRPE daemon

Hi everyone,
i have an embarrassing problem with my NRPE daemon on my solaris x86.
i am doing a lot of change in my NRPE configuration file and i always need to restart it.
sometimes, the restart didn't work and the services become "maintenance". Here is "/var/svc/log/network-cswnrpe:default.log":
[ Jun 24 15:28:39 Stopping because service restarting. ]
[ Jun 24 15:28:39 Executing stop method ("pkill -U nagios") ]
[ Jun 24 15:28:39 Method "stop" exited with status 0 ]
[ Jun 24 15:28:49 Method or service exit timed out. Killing contract 449 ]
[ Jun 24 15:28:50 Method or service exit timed out. Killing contract 449 ]
[ Jun 24 15:28:51 Method or service exit timed out. Killing contract 449 ]
[ Jun 24 15:28:52 Method or service exit timed out. Killing contract 449 ]
[ Jun 24 15:28:53 Method or service exit timed out. Killing contract 449 ]
[ Jun 24 15:28:54 Method or service exit timed out. Killing contract 449 ]
[ Jun 24 15:28:55 Method or service exit timed out. Killing contract 449 ]
[ Jun 24 15:28:56 Method or service exit timed out. Killing contract 449 ]
[ Jun 24 15:28:57 Method or service exit timed out. Killing contract 449 ]
[ Jun 24 15:28:58 Method or service exit timed out. Killing contract 449 ]
[ Jun 24 15:28:59 Method or service exit timed out. Killing contract 449 ]
[ Jun 24 15:29:00 Method or service exit timed out. Killing contract 449 ]As my NRPE is doing a lot of check, i suspect that it appears when NRPE is doing a check (it's why this pb appears sometimes)
You can see that my stop method call "pkill -U nagios", it's because i have change that (before it was "kill"). I have try a lot of thing into the "stop" method but it always do the same thing.
So...before this pb, i have never heard about "contract" and i made my own research....if I understand my pb is that the contract of the NRPE process don't want to die....
i think that contract is faithfull, but this one is very annoying for me, and i see during my google research that this pb appears for several people and services....someone says that this is related to the parent process, and someone say that it's a configuration problem related to the XML of the SMF....
can someboy help me please? i can post the content of the /var/svc/manifest/network/nagios-nrpe.xml file or do a "ptree" if needed.
thx by advance

Hi, anyone can help me for correctly manage this contract? (or going in other way...)

OVS servers restart when iSCSI target restarts

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