Hi,
I have two nodes (RHEL 5.5) configured in a cluster
(Corosync/Pacemaker).
I have an IPaddr2 and Apache resources configured as clones on those
systems (configuration is shown below).
The IPaddr2 is configured for load balancing using ClusterIP with hash
sourceip.
My problem is that when failing back the ClusterIP after an initial
failure test the cluster no longer receives traffic even though the
ClusterIP appears to fail back correctly.
Test as follows:
1. Test initial failure by adding location constraint to one node - this
moves all ClusterIP elements to the opposing node:
e.g. location loc_test cl_ipclust_0 -inf: node2 (will cause ClusterIP
to move to node 1)
2. Observe in web browser traffic is still being sent to Apache and
responses returned correctly
3. Now delete the test constraint and the ClusterIP will return back to
node 2. (confirmed with ifconfig, cat /proc/net/ipt_CLUSTER/192.168.0.10
on both nodes - nodes respond with correct 'id', ping on both nodes to
cluster IP resolves correctly)
4. Attempt to connect with web-browser to ClusterIP and this fails
5. Restart Apache clone and retry - still doesn't work
The only way I can restore traffic is to stop the ClusterIP clone, wait
a few seconds (5-10) and start it again.
Anyone have any idea why this might be?
Any advice appreciated.
Thanks,
Configuration as follows:
node node1
node node2
primitive apache_0 ocf:heartbeat:apache \
params configfile="/etc/httpd/conf/httpd.conf"
httpd="/usr/sbin/httpd.worker"
statusurl="http://localhost/server-status";
envfiles="/etc/sysconfig/httpd" \
op start interval="0" timeout="40" \
op stop interval="0" timeout="60" \
op monitor interval="10" timeout="40"
primitive ipclust_0 ocf:intact:IPaddr2 \
params ip="192.168.0.10" nic="eth0" iflabel="1"
clusterip_hash="sourceip" \
op monitor interval="10" timeout="5"
clone cl_apache0 apache_0 \
meta globally_unique="false" interleave="true"
clone cl_ipclust_0 ipclust_0 \
meta globally-unique="true" interleave="true" clone-node-max="2"
clone-max="2" notify="true" \
params resource-stickiness="0"
RHEL 5.5, kernel 2.6.18-194.8.1.el5 x86_64
Corosync 1.2.7-1.1.el5
Pacemaker 1.0.9.1-1.15.el5
resource-agents 1.0.3-2.6.el5
--
Best Regards,
Brett Delle Grazie
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