[Linux-cluster] fenced(8) not fencing through all fenceing devices

[Miroslav Zubcic]

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As subject says, I have problem with yet another critical cluster
installation. If we cannot reslove this problem, our customer is
considering another cluster solution. :-(

I have two nodes - IBM servers with redundant power. Every server is
connected on the other APC power switch. If we pool out all ethernet
cables from active node, other node will fence faulty unreachable node,
but fenced(8) will only fork ONE fence_apc command to ONE APC power switch.

Every server has first power cable in first, and second in second power
switch for maximal redundancy and secutiry.

By recycling only one power device, server normaly doesn't shut down
because it has redundant power.

I have attached strace(1) on fenced and I see only one fence_apc beeing
execve(2)d and only one connect(2) - on the first (pwr01) switch.

This has worked on RHEL 3 2-3 years ago AFAIR ...


This is relevant part of cluster.conf(5):


        <clusternodes>
                <clusternode name="tan9f1" votes="1">
                        <fence>
                                <method name="1">
                                        <device name="pwr01" port="1"
switch="10.52.2.240"/>
                                </method>
                                <method name="2">
                                        <device name="pwr02" port="1"
switch="10.52.2.241"/>
                                </method>
                        </fence>
                </clusternode>
                <clusternode name="tan9f2" votes="1">
                        <fence>
                                <method name="1">
                                        <device name="pwr01" port="2"
switch="10.52.2.240"/>
                                </method>
                                <method name="2">
                                        <device name="pwr02" port="2"
switch="10.52.2.241"/>
                                </method>
                        </fence>
                </clusternode>
        </clusternodes>
        <cman expected_votes="1" two_node="1"/>
        <fencedevices>
                <fencedevice agent="fence_apc" ipaddr="10.52.2.240"
login="clumgr" name="pwr01" passwd="XXXXXXXXXXX"/>
                <fencedevice agent="fence_apc" ipaddr="10.52.2.241"
login="clumgr" name="pwr02" passwd="XXXXXXXXXXX"/>
        </fencedevices>



- --
Miroslav Zubcic, Nimium d.o.o., email: <mvz at nimium.hr>
Tel: +385 01 4852 639, Fax: +385 01 4852 640, Mobile: +385 098 942 8672
Gredicka 3, 10000 Zagreb, Hrvatska

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