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List:       linux-ha-dev
Subject:    Re: [Linux-ha-dev] Split brain condition endures long time after
From:       "Andrew Beekhof" <beekhof () gmail ! com>
Date:       2008-04-11 8:33:51
Message-ID: 26ef5e70804110133w76628ae0k58e59e637046c94c () mail ! gmail ! com
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2008/4/6 davor emard <davoremard@gmail.com>:
> HI
>
>  After resume from suspend of the master machine the "split brain
>  situation" is kept for about 20 minutes. Both machines keep the shared
>  IP address during this time. Is this OK?

Not OK, but I'd imagine expected if you don't have STONITH (or at
least ipfail) configured.

>
>  I have setup a small test environment with 2 machines on debian
>  one is amd64 computer (with amd64 debian) other is i386 laptop
>  with i386 debian, both  running heartbeat 2.1.3-5
>
>  Shared resource is just a IP address
>
>  Laptop is set as master
>
>  A small setup is set using the same eth0 interface and unicast
>  communication between nodes. Everything works well (shutting
>  down each node, plugging off the cable and plugging it back again),
>  each time master (laptop) acquires the IP address from the slave
>  and split brain is during only a minute or something short.
>
>  But if I do the software suspend of the laptop, wait until slave
>  takes the IP address and then resume the laptop from suspend
>  state - it wakes up with it's IP because it has been suspended,
>  but the computer (slave) doesn't want to give up the resource for 20 min
>
>  Best regards, Davor
>
>  (attached config and syslog from laptop and the computer)
>
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>
>
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