Alex Spengler wrote:
Hi,
I'm stuck in setting up my cluster.
What I want to achive is
- run apache on whatever node together with cluster IP which is
172.23.100.200.
- if apache fails -> switch over to other node
- if gateway 172.23.100.1 is not reachable -> switch over to other node
AND allow unlimited number of switchovers!
This is the problem, it does switch over but only once or twice and then
it's stuck .. any ideas?
*unlimited* is pretty much impossible I think.
But you may start with this:
Set a #uname score of 5050 for one node, 5000 for the other node.
Set resource_failure_stickiness to -100.
Use a multiplier of 100 for pingd and pingd as a score_attribute (sth like:
<rsc_location id="rsc-loc-syslog" rsc="syslog">
<rule id="syslog-connected" score_attribute="pingd">
<expression id="syslog-connected-rule-1"
attribute="pingd" operation="defined"/>
</rule>
</rsc_location>
)
Then you will end up with:
Startup
node1: 5050 + 100 pingd
node2: 5000 + 100 pingd
decision: start on node1
now, whatever fails will reduce the score by 100, causing a failover.
With a start at 5000, you can have 50 failovers. Enlarge as needed.
Regards
Dominik
thanks in advance
Alex
*Here my config:*
*Node1 - big-sSTATSfe1*
eth0: 172.23.100.26
eth1: 192.168.0.1
*Node2 - big-sSTATSfe2*
eth0: 172.23.100.22
eth1:192.168.0.2
*ha.cf:*
use_logd yes
node big-sSTATSfe1 big-sSTATSfe2
deadtime 5
deadping 5
initdead 60
warntime 3
crm true
ucast eth0 172.23.100.22 # 172.23.100.26 on the second node
ucast eth1 192.168.0.2 # 192.168.0.1 on the second node
ping 172.23.100.1
*cib.xml*
<cib admin_epoch="1" epoch="1" num_updates="1" generated="true"
have_quorum="true" ignore_dtd="false" num_peers="2"
dc_uuid="68cd29ed-c7fe-44d9-9fe8-a1258e5b1d0f">
<configuration>
<crm_config>
<cluster_property_set id="cib-bootstrap-options">
<attributes>
<nvpair id="cib-bootstrap-options-symmetric-cluster"
name="symmetric-cluster" value="true"/>
<nvpair id="cib-bootstrap-options-no-quorum-policy"
name="no-quorum-policy" value="ignore"/>
<nvpair id="cib-bootstrap-options-default-resource-stickiness"
name="default-resource-stickiness" value="0"/>
<nvpair id="cib-bootstrap-options-default-resource-failure-stickiness"
name="default-resource-failure-stickiness" value="-100"/>
<nvpair id="cib-bootstrap-options-stonith-enabled"
name="stonith-enabled" value="true"/>
<nvpair id="cib-bootstrap-options-stonith-action" name="stonith-action"
value="reboot"/>
<nvpair id="cib-bootstrap-options-remove-after-stop"
name="remove-after-stop" value="false"/>
<nvpair id="cib-bootstrap-options-short-resource-names"
name="short-resource-names" value="true"/>
<nvpair id="cib-bootstrap-options-transition-idle-timeout"
name="transition-idle-timeout" value="1min"/>
<nvpair id="cib-bootstrap-options-default-action-timeout"
name="default-action-timeout" value="10s"/>
<nvpair id="cib-bootstrap-options-is-managed-default"
name="is-managed-default" value="true"/>
</attributes>
</cluster_property_set>
</crm_config>
<nodes/>
<resources>
<group id="apache_group_p80" ordered="true" collocated="true">
<primitive class="ocf" provider="heartbeat" type="IPaddr"
id="IPaddr_p80">
<instance_attributes id="IPaddr_1_inst_attr">
<attributes>
<nvpair id="IPaddr_p80_attr_0" name="ip" value="172.23.100.200"/>
<nvpair id="IPaddr_p80_attr_1" name="netmask" value="255.255.255.0"/>
<nvpair id="IPaddr_p80_attr_2" name="nic" value="eth0"/>
<nvpair id="IPaddr_p80_attr_3" name="broadcast" value="172.23.100.255
"/>
</attributes>
</instance_attributes>
<operations>
<op id="IPaddr_p80_mon" name="monitor" interval="2s" timeout="3s"/>
</operations>
</primitive>
<primitive id="apache_p80" class="lsb" type="apache"
provider="heartbeat">
<instance_attributes id="inatt_apache_p80">
<attributes>
<nvpair name="configfile" value="/etc/httpd/conf/httpd.conf"
id="nvpb1_apache_p80"/>
<nvpair name="statusurl" value="
http://172.23.100.200:80/server-status <http://172.23.100.200/server-status>"
id="nvpb2_apache_p80"/>
</attributes>
</instance_attributes>
<operations>
<op id="apache_p80:start" name="start" timeout="10s"/>
<op id="apache_p80:stop" name="stop" timeout="10s"/>
<op id="apache_p80:monitor" name="monitor" interval="2s"
timeout="5s"/>
</operations>
</primitive>
</group>
<clone id="pingd">
<instance_attributes id="pingd">
<attributes>
<nvpair id="pingd-clone_max" name="clone_max" value="2"/>
<nvpair id="pingd-clone_node_max" name="clone_node_max" value="1"/>
</attributes>
</instance_attributes>
<primitive id="gateway" class="ocf" type="pingd" provider="heartbeat">
<operations>
<op id="gateway:child-monitor" name="monitor" interval="5s"
timeout="5s" prereq="nothing"/>
<op id="gateway:child-start" name="start" prereq="nothing"/>
</operations>
<instance_attributes id="pingd_inst_attrs">
<attributes>
<nvpair id="pingd-dampen" name="dampen" value="5s"/>
<nvpair id="pingd-multiplier" name="multiplier" value="100"/>
</attributes>
</instance_attributes>
</primitive>
</clone>
</resources>
<constraints>
<rsc_colocation id="colocation_apache_group_p80" from="apache_group_p80"
to="apache_group_p80" score="INFINITY"/>
<rsc_location id="gateway:connected" rsc="apache_group_p80">
<rule id="gateway:connected:rule" score="-INFINITY" boolean_op="or">
<expression id="gateway:connected:expr:undefined" attribute="pingd"
operation="not_defined"/>
<expression id="gateway:connected:expr:zero" attribute="pingd"
operation="lte" value="0"/>
</rule>
</rsc_location>
</constraints>
</configuration>
<status/>
</cib>
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See also: http://linux-ha.org/ReportingProblems
