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.
Dan
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