[ClusterLabs] IPaddr2 works for 12 seconds then stops
daniel at Biblestuph.com
Tue Nov 13 09:06:56 EST 2018
On 10/11/2018 5:00 PM, Valentin Vidic wrote:
> On Thu, Oct 11, 2018 at 01:25:52PM -0400, Daniel Ragle wrote:
>> For the 12 second window it *does* work in, it appears as though it works
>> only on one of the two servers (and always the same one). My twelve seconds
>> of pings runs continuously then stops; while attempts to hit the Web server
>> works hit or miss depending on my source port (I'm using
>> sourceip-sourceport). I.E., as if anything that would be handled by the
>> other server isn't making it through. But after the 12 seconds neither
>> server responds to the requests against the VIP (but they do respond fine to
>> their own static IPs at all times).
> Could be that the switch in front of the servers does not like to see
> the same MAC on two ports or something like that.
>> During the 12 seconds that it works I get these in the logs of the server
>> that *is* responding:
>> Oct 11 12:17:43 node2 kernel: ipt_CLUSTERIP: unknown protocol 1
>> Oct 11 12:17:44 node2 kernel: ipt_CLUSTERIP: unknown protocol 1
>> Oct 11 12:17:45 node2 kernel: ipt_CLUSTERIP: unknown protocol 1
> Protocol 1 once per second should be ICMP PING so this is just CLUSTERIP
> complaining that it can't calculate sourceip-sourceport for those packets
> (ICMP has no source port).
> So maybe try recording the traffic using tcpdump on both servers and
> see if any requests are comming in at all from the network equipment.
Thanks, finally getting back to this. Putting a tshark on both nodes and
then restarting the VIP-clone resource shows the pings coming through
for 12 seconds, always on node2, then stop. I.E., before/after those 12
seconds nothing on either node from the server initiating the pings.
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