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<tt>Thx Klaus, appreciate your feedback.<br>
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Regards<br>
Javier<br>
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<td align="left" style="vertical-align:top;font-family:Arial;">Francisco Javier<span style="font-family:remialcxesans;font-size:1px;color:#FFFFFF;line-height:1px;"></span></td>
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<td align="left" style="vertical-align:top;font-family:Arial;">IT System Engineer</td>
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On 5/9/2019 1:14 PM, Klaus Wenninger wrote:<br>
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<blockquote type="cite" cite="mid:c224c40c-3a9b-ec52-1758-38835230abc7@redhat.com">
<pre class="moz-quote-pre" wrap="">On 5/9/19 1:03 PM, Lopez, Francisco Javier [Global IT] wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">Good day guys !
I'm implementing fencing in my two node cluster with this detail:
- fence_vmware_soap
- PostgreSql release 10.X
- CentOS 7.X
As far as I know, to create the resources, I can use two different ways:
- Create only one resource for both nodes, following this way:
# pcs -f stonith_cfg stonith create fence_nodes \
fence_vmware_soap \
ipaddr=<VM_IP> \
ssl_insecure=1 \
login="<VM_user>" \
passwd="<VM_passwd>" \
action=reboot \
pcmk_host_list="node_01,node_02" \
power_wait=3 op monitor interval=60s
- Create two different resources, one for each node, following this way:
# pcs -f stonith_cfg stonith create fence_node_01 \
fence_vmware_soap \
ipaddr=<VM_IP> \
ssl_insecure=1 \
login="<VM_user>" \
passwd="<VM_passwd>" \
action=reboot \
pcmk_host_list="node_01" \
power_wait=3 op monitor interval=60s
# pcs -f stonith_cfg stonith create fence_node_02 \
fence_vmware_soap \
ipaddr=<VM_IP> \
ssl_insecure=1 \
login="<VM_user>" \
passwd="<VM_passwd>" \
action=reboot \
pcmk_host_list="node_02" \
power_wait=3 op monitor interval=60s
With this method I understand I will have to add some constraints, etc.
Said this, my questions are:
- Which are the differences among them ? (if any).
- Is there any recommended option and why ?
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">For your 2-node-cluster there might be a definite reason why you'd
like to have 2 fence-resources as to prevent fence-races when both
are still alive but just don't see each other. If you make one
wait a little longer to fence you can determine which one would
rather win.
If the aim is just to prevent that they fence each other at the same
time introduction of a random delay should be fine as well.
(That is pcmk_delay_max and if you want to further tailor the delay
with astatic delay component you can use pcmk_delay_base on top.)
Klaus
</pre>
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<pre class="moz-quote-pre" wrap="">
Regards
Javier
Francisco Javier Lopez
IT System Engineer | Global IT
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