Hello Mathieu, On 11/17/2011 07:22 PM, SEILLIER Mathieu wrote: > Hi all, > > I have to use Heartbeat with Pacemaker for High Availability between 2 Tomcat > 5.5 servers under Linux RedHat 5.4. > The first server is active, the other one is passive. The master is called > servappli01, with IP address 186.20.100.81, the slave is called servappli02, > with IP address 186.20.100.82. > I configured a virtual IP 186.20.100.83. Each Tomcat is not launched when > server is started, this is Heartbeat which starts Tomcat when it's running. > All seem to be OK, each server see the other as active, and the crm_mon > command shows this below : > > ============ > Last updated: Thu Nov 17 19:03:34 2011 > Stack: Heartbeat > Current DC: servappli01 (bf8e9a46-8691-4838-82d9-942a13aeedca) - partition > with quorum > Version: 1.0.11-1554a83db0d3c3e546cfd3aaff6af1184f79ee87 > 2 Nodes configured, 2 expected votes > 2 Resources configured. > ============ > > Online: [ servappli01 servappli02 ] > > Clone Set: ClusterIPClone (unique) > ClusterIP:0 (ocf::heartbeat:IPaddr2): Started servappli01 > ClusterIP:1 (ocf::heartbeat:IPaddr2): Started servappli02
Your did not only configured a simple VIP but a cluster IP which acts
like a simple static loadbalancer ... man iptables ... search for CLUSTERIP.
If this was not your intention, simply don't clone it.
If you want a clusterip you have to choose correct meta attributes:
clone ClusterIPClone ClusterIP \
meta globally-unique="true" clone-node-max=2 interleave=true
> Clone Set: TomcatClone (unique)
> Tomcat:0 (ocf::heartbeat:tomcat): Started servappli01
> Tomcat:1 (ocf::heartbeat:tomcat): Started servappli02
>
>
> The 2 Tomcat servers as identical, and the same webapps are deployed on each
> server in order to be able to access webapps on the other server if one is
> down.
> By default, requests from clients are processed by the first server because
> it's the master.
> My problem is that when I crash the Tomcat on the first server, requests from
> clients are not redirected to the second server. For a while, requests are
> not processed, then Heartbeat restarts Tomcat itself and requests are
> processed again by the first server.
> Requests are never forwarded to the second Tomcat if the first is down.
Default behavior on monitoring errors is a local restart. If you always
test from the same IP I would expect your requests to fail while Tomcat
is not running on the one node you are redirected ... so if you choose
the clusterip_hash "sourceip-sourceport" your chance should be 50/50 to
get redirected ... if you want a "real" loadbalancer you might want to
integrate a service likde ldirectord with realserver checks to remove a
non-working service from the loadbalancing.
... use "ip addr show" or define a label to see your VIP ...
Regards,
Andreas
--
Need help with Pacemaker?
http://www.hastexo.com/now
>
> Here is my configuration :
>
> ha.cf file (the same on each server) :
>
> crm respawn
> logfacility local0
> logfile /var/log/ha-log
> debugfile /var/log/ha-debug
> warntime 10
> deadtime 20
> initdead 120
> keepalive 2
> autojoin none
> node servappli01
> node servappli02
> ucast eth0 186.20.100.81 # ignored by node1 (owner of ip)
> ucast eth0 186.20.100.82 # ignored by node2 (owner of ip)
>
> cib.xml file (the same on each server) :
>
> <?xml version="1.0" ?>
> <cib admin_epoch="0" crm_feature_set="3.0.1"
> dc-uuid="bf8e9a46-8691-4838-82d9-942a13aeedca" epoch="127" have-quorum="1"
> num_updates="51" validate-with="pacemaker-1.0">
> <configuration>
> <crm_config>
> <cluster_property_set id="cib-bootstrap-options">
> <nvpair id="cib-bootstrap-options-dc-version" name="dc-version"
> value="1.0.11-1554a83db0d3c3e546cfd3aaff6af1184f79ee87"/>
> <nvpair id="cib-bootstrap-options-cluster-infrastructure"
> name="cluster-infrastructure" value="Heartbeat"/>
> <nvpair id="cib-bootstrap-options-expected-quorum-votes"
> name="expected-quorum-votes" value="2"/>
> <nvpair id="cib-bootstrap-options-no-quorum-policy"
> name="no-quorum-policy" value="ignore"/>
> <nvpair id="cib-bootstrap-options-stonith-enabled"
> name="stonith-enabled" value="false"/>
> </cluster_property_set>
> </crm_config>
> <nodes>
> <node id="489a0305-862a-4280-bce5-6defa329df3f" type="normal"
> uname="servappli01"/>
> <node id="bf8e9a46-8691-4838-82d9-942a13aeedca" type="normal"
> uname="servappli02"/>
> </nodes>
> <resources>
> <clone id="TomcatClone">
> <meta_attributes id="TomcatClone-meta_attributes">
> <nvpair id="TomcatClone-meta_attributes-globally-unique"
> name="globally-unique" value="true"/>
> </meta_attributes>
> <primitive class="ocf" id="Tomcat" provider="heartbeat" type="tomcat">
> <instance_attributes id="Tomcat-instance_attributes">
> <nvpair id="Tomcat-instance_attributes-tomcat_name"
> name="tomcat_name" value="TomcatSBNG"/>
> <nvpair id="Tomcat-instance_attributes-tomcat_user"
> name="tomcat_user" value="tomcat"/>
> <nvpair id="Tomcat-instance_attributes-statusurl"
> name="statusurl" value="http://127.0.0.1:8080/mas-security/Security"/>
> <nvpair id="Tomcat-instance_attributes-java_home"
> name="java_home" value="/usr/java/default"/>
> <nvpair id="Tomcat-instance_attributes-catalina_home"
> name="catalina_home" value="/usr/share/tomcat55"/>
> </instance_attributes>
> <operations>
> <op id="Tomcat-monitor-30s" interval="30s" name="monitor"
> timeout="60s"/>
> <op id="Tomcat-start-0" interval="0" name="start" timeout="120s"/>
> <op id="Tomcat-stop-0" interval="0" name="stop" timeout="120s"/>
> </operations>
> </primitive>
> </clone>
> <clone id="ClusterIPClone">
> <meta_attributes id="ClusterIPClone-meta_attributes">
> <nvpair id="ClusterIPClone-meta_attributes-globally-unique"
> name="globally-unique" value="true"/>
> </meta_attributes>
> <primitive class="ocf" id="ClusterIP" provider="heartbeat"
> type="IPaddr2">
> <instance_attributes id="ClusterIP-instance_attributes">
> <nvpair id="ClusterIP-instance_attributes-ip" name="ip"
> value="186.20.100.83"/>
> <nvpair id="ClusterIP-instance_attributes-cidr_netmask"
> name="cidr_netmask" value="24"/>
> <nvpair id="ClusterIP-instance_attributes-clusterip_hash"
> name="clusterip_hash" value="sourceip"/>
> </instance_attributes>
> <operations>
> <op id="ClusterIP-monitor-30s" interval="30s" name="monitor"/>
> </operations>
> </primitive>
> </clone>
> </resources>
> <constraints>
> <rsc_colocation id="ip-with-tomcat" rsc="ClusterIPClone"
> score="INFINITY" with-rsc="TomcatClone"/>
> <rsc_order first="TomcatClone" id="ip-after-tomcat" score="INFINITY"
> then="ClusterIPClone"/>
> </constraints>
> <rsc_defaults>
> <meta_attributes id="rsc-options">
> <nvpair id="rsc-options-resource-stickiness"
> name="resource-stickiness" value="100"/>
> </meta_attributes>
> </rsc_defaults>
> </configuration>
> </cib>
>
> Another strange thing is that the VIP never appears in the result of ifconfig
> command...
> Can somebody help me please ?
> I guess there's is something wrong but I don't know what !
> Thanx
>
> Mathieu
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