[Linux-cluster] Question about cluster behavior

[emmanuel segura]

in this case your quorum should be provides 2 votes, in this case if two
nodes dies and you want to continue with just one node {1(votes per node) +
2(quorum devices) = 3 votes of 5}, more than half


2014-02-14 18:34 GMT+01:00 Digimer <lists at alteeve.ca>:

> Replies in-line:
>
>
> On 14/02/14 12:07 PM, FABIO FERRARI wrote:
>
>> So it's not a normal behavior, I guess.
>>
>> Here is my cluster.conf:
>>
>> <?xml version="1.0"?>
>> <cluster config_version="59" name="mail">
>>          <clusternodes>
>>                  <clusternode name="eta.mngt.unimo.it" nodeid="1">
>>                          <fence>
>>                                  <method name="fence-eta">
>>                                          <device name="fence-eta"/>
>>                                  </method>
>>                          </fence>
>>                  </clusternode>
>>                  <clusternode name="beta.mngt.unimo.it" nodeid="2">
>>                          <fence>
>>                                  <method name="fence-beta">
>>                                          <device name="fence-beta"/>
>>                                  </method>
>>                          </fence>
>>                  </clusternode>
>>                  <clusternode name="guerro.mngt.unimo.it" nodeid="3">
>>                          <fence>
>>                                  <method name="fence-guerro">
>>                                          <device name="fence-guerro"
>> port="Guerro
>> " ssl="on" uuid="4213f370-9572-63c7-26e4-22f0f43843aa"/>
>>                                  </method>
>>                          </fence>
>>                  </clusternode>
>>          </clusternodes>
>>          <cman expected_votes="5"/>
>>
>
> You generally don't need to set this, the cluster can calculate it.
>
>           <quorumd label="mail-qdisk"/>
>>
>
> You don't set any votes, so the default is "1". So with expected votes
> being 5, that means all three nodes have to be up or two nodes and qdisk.
>
>
>           <rm>
>>                  <resources>
>>                          <ip address="155.185.44.61/24" sleeptime="10"/>
>>                          <mysql config_file="/etc/my.cnf"
>> listen_address="155.185.44.61" name="mysql"
>> shutdown_wait="10" startup_wait="10"/>
>>                          <script file="/etc/init.d/httpd" name="httpd"/>
>>                          <script file="/etc/init.d/postfix"
>> name="postfix"/>
>>                          <script file="/etc/init.d/dovecot"
>> name="dovecot"/>
>>                          <fs device="/dev/mapper/mailvg-maillv"
>> force_fsck="1" force_unmount="1" fsid="58161"
>> fstype="xfs" mountpoint="/cl" name="mailvg-maill
>> v" options="defaults,noauto" self_fence="1"/>
>>                          <lvm lv_name="maillv" name="lvm-mailvg-maillv"
>> self_fence="1" vg_name="mailvg"/>
>>                  </resources>
>>                  <failoverdomains>
>>                          <failoverdomain name="mailfailoverdomain"
>> nofailback="1" ordered="1" restricted="1">
>>                                  <failoverdomainnode
>> name="eta.mngt.unimo.it" priority="1"/>
>>                                  <failoverdomainnode
>> name="beta.mngt.unimo.it" priority="2"/>
>>                                  <failoverdomainnode
>> name="guerro.mngt.unimo.it" priority="3"/>
>>                          </failoverdomain>
>>                  </failoverdomains>
>>                  <service domain="mailfailoverdomain" max_restarts="3"
>> name="mailservices" recovery="restart"
>> restart_expire_time="600">
>>                          <fs ref="mailvg-maillv">
>>                                  <ip ref="155.185.44.61/24">
>>                                          <mysql ref="mysql">
>>                                                  <script ref="httpd"/>
>>                                                  <script ref="postfix"/>
>>                                                  <script ref="dovecot"/>
>>                                          </mysql>
>>                                  </ip>
>>                          </fs>
>>                  </service>
>>          </rm>
>>          <fencedevices>
>>                  <fencedevice agent="fence_ipmilan" auth="password"
>> ipaddr="155.185.135.105" lanplus="on" login="root"
>> name="fence-eta" passwd="******" pr
>> ivlvl="ADMINISTRATOR"/>
>>                  <fencedevice agent="fence_ipmilan" auth="password"
>> ipaddr="155.185.135.106" lanplus="on" login="root"
>> name="fence-beta" passwd="******" p
>> rivlvl="ADMINISTRATOR"/>
>>                  <fencedevice agent="fence_vmware_soap"
>> ipaddr="155.185.0.10" login="etabetaguerro"
>> name="fence-guerro" passwd="******"/>
>>          </fencedevices>
>> </cluster>
>>
>> What log file do you need? There are many in /var/log/cluster..
>>
>
> By default, /var/log/messages is the most useful. Checking 'cman_tool
> status' and 'clustat' are also good.
>
> --
> Digimer
> Papers and Projects: https://alteeve.ca/w/
> What if the cure for cancer is trapped in the mind of a person without
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>
>
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