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<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>Possible
bug with mandatory ordering involving stateful (i.e. master-slave) resources<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>I
have a 2-node cluster (we are running the SLES 11 HA extension, so the
pacemaker version is 1.1.2) in which a master-slave resource is dependent on a
clone resource via a mandatory ordering constraint. From “crm
configure show”:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>primitive
dummy ocf:heartbeat:Dummy \<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>
op monitor interval="15s" \<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>
op start <s>interval="0"</s> timeout="40s" \<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>
op stop <s>interval="0"</s> timeout="60s"<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>primitive
statefuldummy ocf:heartbeat:Stateful \<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>
op start timeout="1800s" \<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>
op timeout="45s" \<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>
op monitor interval="10s" timeout="60s" \<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>
op promote timeout="45s" \<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>
op demote timeout="30s"<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>ms
dummy-ms statefuldummy \<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>
meta target-role="Started" master-max="1" master-node-max="1"
clone-max="2" clone-node-max="1" notify="false"
ordered="false" globally-unique="false"
is-managed="true"<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>clone
dummy-clone dummy \<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>
meta target-role="Started"<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>order
dummy-order inf: dummy-clone dummy-ms<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>(I
reproduced the problem we are experiencing with dummy resources to try and
eliminate the RAs for our real resources as the source of the issue.)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>The
order of events is as follows:<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-family:"Cambria","serif";color:black'><span style='mso-list:Ignore'>1)<span
style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
style='font-family:"Cambria","serif";color:black'>Force a shutdown of the
dummy-clone via “crm resource stop dummy-clone”<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-family:"Cambria","serif";color:black'><span style='mso-list:Ignore'>2)<span
style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
style='font-family:"Cambria","serif";color:black'>Logs show that the crm stops
both the master and slave statefuldummy resources of the dummy-ms. Good.<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-family:"Cambria","serif";color:black'><span style='mso-list:Ignore'>3)<span
style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
style='font-family:"Cambria","serif";color:black'>Logs show that the crm stops
the dummy-clone resources. Good.<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-family:"Cambria","serif";color:black'><span style='mso-list:Ignore'>4)<span
style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
style='font-family:"Cambria","serif";color:black'>Logs immediately show that
the crm starts the master and slave statefuldummy resources of the
dummy-ms. Bad.<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-family:"Cambria","serif";color:black'><span style='mso-list:Ignore'>5)<span
style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
style='font-family:"Cambria","serif";color:black'>Logs show the crm stopping
the statefuldumy resources again. Good?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>Has
anyone seen something similar? My understanding of the ordering
constraints tells me that event #4 is erroneous behaviour. I would not
expect the statefuldummy resources to be restarted until a “crm resource
start dummy-clone” command is issued. If I have other types of
resources dependent on the clone, such as another clone or a group, they behave
as I would expect. It seems to be only with master-slave resources that
the crm tries to start the resource inappropriately.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>In
our real cluster, the master-slave returns an error (OCF_ERR_GENERIC) when it
is started while its prerequisite resource is not started. In this case,
event#5 does not happen, and the master-slave is never again restarted, even
after the prerequisite clone resource is restarted via “crm resource
start <resource-name>”.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>Thanks
for your help,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>Chris
King<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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