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[Linux-cluster] STONITH




I had a quick search through your threads but couldn't find an exact hit which includes a resolution so I thought I'd try posting this here.

We have a two node RH ES 3.0 cluster which uses an MSA 500 G2 shared array with a single LUN, and a crossover cable set up as eth1 for heartbeat.
Both nodes are dual fed through an NPS power switch.

All works fine and has done for 18 months but we've had 2 outages recently where the following happens...

We appear to lose eth1, and the MSA 500 G2 starts timing out, and by the time I get in in the morning I can see errors on the MSA 500 G2 LCDs saying "43 REDUNDANCY FAILED" and "POWER OK" resepctively on the secondary and primary controllers.

Both servers are up, but the failover node appears to have been forcibly rebooted by STONITH, with 2 plugs in the NPS being turned off & on again.

This leaves neither node able to talk to the shared array, and the service down.

Powering cycling both nodes and the array fixes the problem, but I want to know whats causing it in the first place.  It doesn't appear to be related to load, although I can't rule that out - both outages were at approx 04:40 on a Friday.

Here are the key msgs from syslog...

Sep 29 04:44:50 node1 kernel: tg3: eth1: Link is down.
Sep 29 04:44:51 node1 kernel: cciss: cmd f79252b0 timedout
.......~100 of these
Sep 29 04:44:51 node1 kernel: cciss: cmd f79216f8 timedout
Sep 29 04:44:53 node1 kernel: tg3: eth1: Link is up at 1000 Mbps, full duplex.
Sep 29 04:44:53 node1 kernel: tg3: eth1: Flow control is off for TX and off for RX.
Sep 29 04:45:03 node1 clumembd[2411]: <info> Membership View #3:0x00000001
Sep 29 04:45:04 node1 cluquorumd[2389]: <warning> --> Commencing STONITH <--
Sep 29 04:45:06 node1 cluquorumd[2389]: Power to NPS outlet(s) 6 turned /Off.
Sep 29 04:45:07 node1 kernel: tg3: eth1: Link is down.
Sep 29 04:45:08 node1 cluquorumd[2389]: Power to NPS outlet(s) 2 turned /Off.
Sep 29 04:45:08 node1 cluquorumd[2389]: <notice> STONITH: node2-h has been fenced!
Sep 29 04:45:10 node1 cluquorumd[2389]: Power to NPS outlet(s) 6 turned /On.
Sep 29 04:45:12 node1 cluquorumd[2389]: Power to NPS outlet(s) 2 turned /On.
Sep 29 04:45:12 node1 cluquorumd[2389]: <notice> STONITH: node2-h is no longer fenced off.
Sep 29 04:45:14 node1 kernel: tg3: eth1: Link is up at 1000 Mbps, full duplex.
Sep 29 04:45:14 node1 kernel: tg3: eth1: Flow control is off for TX and off for RX.
Sep 29 04:47:41 node1 kernel: tg3: eth1: Link is down.
Sep 29 04:47:44 node1 kernel: tg3: eth1: Link is up at 1000 Mbps, full duplex.
Sep 29 04:47:44 node1 kernel: tg3: eth1: Flow control is on for TX and on for RX.

I thought it would go again this morning so I turned up the cluster daemon loglevels, and unfortunately it didn't crash but I spotted this in the debug msgs....

Oct  6 04:39:31 node1 clulockd[2462]: <debug> ioctl(fd,SIOCGARP,ar [eth1]): No such device or address
Oct  6 04:39:31 node1 clulockd[2462]: <debug> Connect: Member #1 (192.168.100.101) [IPv4]
Oct  6 04:39:31 node1 clulockd[2462]: <debug> Processing message on 11
Oct  6 04:39:31 node1 clulockd[2462]: <debug> Received 188 bytes from peer
Oct  6 04:39:31 node1 clulockd[2462]: <debug> LOCK_LOCK | LOCK_TRYLOCK
Oct  6 04:39:31 node1 clulockd[2462]: <debug> lockd_trylock: member #1 lock 0
Oct  6 04:39:31 node1 clulockd[2462]: <debug> Replying ACK

The point is the cluster is working fine, and fails over and back fine.  I can telnet onto the NPS from both nodes so thats OK too.
As far as I can tell eth1 is set up OK, and working across 192.168 addresses.

Any ideas where to start looking at this?

Regards,
GXW  :o)


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