[ClusterLabs] stonith device locate on same host in active/passive cluster

[Marek Grac]

On Tue, May 2, 2017 at 11:02 AM, Albert Weng <weng.albert at gmail.com> wrote:

>
> Hi Marek,
>
> thanks for your quickly responding.
>
> According to you opinion, when i type "pcs status" then i saw the
> following result of fence :
> ipmi-fence-node1    (stonith:fence_ipmilan):    Started cluaterb
> ipmi-fence-node2    (stonith:fence_ipmilan):    Started clusterb
>
> Does it means both ipmi stonith devices are working correctly? (rest of
> resources can failover to another node correctly)
>

Yes, they are working correctly.

When it becomes important to run fence agents to kill the other node. It
will be executed from the other node, so the fact where fence agent resides
currently is not important

m,


>
> should i have to use location constraint to avoid stonith device running
> on same node ?
> # pcs constraint location ipmi-fence-node1 prefers clustera
> # pcs constraint location ipmi-fence-node2 prefers clusterb
>
> thanks a lot
>
> On Tue, May 2, 2017 at 4:25 PM, Marek Grac <mgrac at redhat.com> wrote:
>
>> Hi,
>>
>>
>>
>> On Tue, May 2, 2017 at 3:39 AM, Albert Weng <weng.albert at gmail.com>
>> wrote:
>>
>>> Hi All,
>>>
>>> I have created active/passive pacemaker cluster on RHEL 7.
>>>
>>> here is my environment:
>>> clustera : 192.168.11.1
>>> clusterb : 192.168.11.2
>>> clustera-ilo4 : 192.168.11.10
>>> clusterb-ilo4 : 192.168.11.11
>>>
>>> both nodes are connected SAN storage for shared storage.
>>>
>>> i used the following cmd to create my stonith devices on each node :
>>> # pcs -f stonith_cfg stonith create ipmi-fence-node1 fence_ipmilan parms
>>> lanplus="ture" pcmk_host_list="clustera" pcmk_host_check="static-list"
>>> action="reboot" ipaddr="192.168.11.10" login=adminsitrator passwd=1234322
>>> op monitor interval=60s
>>>
>>> # pcs -f stonith_cfg stonith create ipmi-fence-node02 fence_ipmilan
>>> parms lanplus="true" pcmk_host_list="clusterb"
>>> pcmk_host_check="static-list" action="reboot" ipaddr="192.168.11.11"
>>> login=USERID passwd=password op monitor interval=60s
>>>
>>> # pcs status
>>> ipmi-fence-node1                     clustera
>>> ipmi-fence-node2                     clusterb
>>>
>>> but when i failover to passive node, then i ran
>>> # pcs status
>>>
>>> ipmi-fence-node1                    clusterb
>>> ipmi-fence-node2                    clusterb
>>>
>>> why both fence device locate on the same node ?
>>>
>>
>> When node 'clustera' is down, is there any place where ipmi-fence-node*
>> can be executed?
>>
>> If you are worrying that node can not self-fence itself you are right.
>> But if 'clustera' will become available then attempt to fence clusterb will
>> work as expected.
>>
>> m,
>>
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>>
>
>
> --
> Kind regards,
> Albert Weng
>
>
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