[Linux-HA] Another DC detected after power cycle

[Xinwei Hu]

2007/6/13, Thomas Åkerblom (HF/EBC) <thomas.akerblom at ericsson.com>:
>
> Hi All.
> One of our tester has a system with four servers and a standby (heartbeat
> 2.0.7).
> servers:
> lab14b-ts-lim1
> lab14b-ts-lim2
> lab14b-ts-lim3
> lab14b-ts-lim4
> standby:
> lab14b-ts-limx
> For each server there is a group of three services (two IP addresses and a
> telephony service).
> group_lim1
> group_lim2
> group_lim3
> group_lim4
> If one server goes down the standby should take over the failing group.
> At one point the tester powered down lim1 and lim2 and after a short time
> powered them up again.
> Lim1 09:55:06
> Lim2 09:54:20
> Group_lim1 starts on lim1 and group_lim2 starts on lim2
> At 12:25:05 the standby suddenly begins to start group_lim3 and at the
> same time group_lim2.
> The services for these two groups go up and down for a while until the IPs
> for group_lim3 and the telephony service for group_lim2 are running.


I see this in messages-lim2.txt:
===
Jun 11 12:24:59 lab14b-ts-lim2 heartbeat: [3362]: info: Link
lab14b-ts-lim3:eth0 dead.
Jun 11 12:25:02 lab14b-ts-lim2 kernel: tg3: eth1: Link is down.
Jun 11 12:25:03 lab14b-ts-lim2 kernel: tg3: eth0: Link is down.
===
and soon:
===
Jun 11 12:25:09 lab14b-ts-lim2 kernel: tg3: eth1: Link is up at 100 Mbps,
full duplex.
Jun 11 12:25:09 lab14b-ts-lim2 kernel: tg3: eth1: Flow control is off for TX
and off for RX.
Jun 11 12:25:10 lab14b-ts-lim2 kernel: tg3: eth0: Link is up at 100 Mbps,
full duplex.
Jun 11 12:25:10 lab14b-ts-lim2 kernel: tg3: eth0: Flow control is off for TX
and off for RX.
===
lab14b-ts-lim2 went off-line for a moment for a reason we don't know yet.
Heartbeat handled this right as far as I understand.

At this time I can see the message 'Another DC detected' in lim2 and in
> limx.
> Crm_mon will in all nodes show that lim3 is OFFLINE, even on lim3 itself.
> I'm confused, can someone shed some light on this matter.
> I attach logs that I think may be of interest.
>
> <<nodgp.zip>>
> BR.
> *** Thomas
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