[Pacemaker] Re: Understanding rules: location, colocation, order. Using with Master/Slave

Tue Oct 28 19:05:01 UTC 2008

I don't see any attachments :-)

On Tue, Oct 28, 2008 at 12:31 PM, Adrian Chapela
<achapela.rexistros at gmail.com> wrote:
> Serge Dubrouski escribió:
>>
>> On Tue, Oct 28, 2008 at 11:09 AM, Adrian Chapela
>> <achapela.rexistros at gmail.com> wrote:
>>
>>>
>>> Serge Dubrouski escribió:
>>>
>>>>
>>>> On Tue, Oct 28, 2008 at 10:22 AM, Adrian Chapela
>>>> <achapela.rexistros at gmail.com> wrote:
>>>>
>>>>
>>>>>
>>>>> Serge Dubrouski escribió:
>>>>>
>>>>>
>>>>>>
>>>>>> On Tue, Oct 28, 2008 at 6:29 AM, Adrian Chapela
>>>>>> <achapela.rexistros at gmail.com> wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>>> Serge Dubrouski escribió:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>
>>>>>>>> On Mon, Oct 27, 2008 at 12:43 PM, Adrian Chapela
>>>>>>>> <achapela.rexistros at gmail.com> wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>>
>>>>>>>>> Serge Dubrouski escribió:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Something like this:
>>>>>>>>>>
>>>>>>>>>>  <rsc_order id="drbd0_before_myGroup" first="ms-drbd0"
>>>>>>>>>> then="myGroup" then-action="start" first-action="promote"/>
>>>>>>>>>>  <rsc_colocation id="myGroup_on_drbd0" rsc="myGroup"
>>>>>>>>>> with-rsc="ms-drbd0" with-rsc-role="Master" score="INFINITY"/>
>>>>>>>>>>  <rsc_location id="primNode" rsc="myGroup">
>>>>>>>>>>    <rule id="prefered_primNode" score="1000">
>>>>>>>>>>      <expression attribute="#uname" id="expression.id2242728"
>>>>>>>>>> operation="eq" value="fc-node1"/>
>>>>>>>>>>    </rule>
>>>>>>>>>>  </rsc_location>
>>>>>>>>>>
>>>>>>>>>> See that cib.xml that I sent you a couple of days ago. First rule
>>>>>>>>>> will
>>>>>>>>>> promote DRBD before starting a group, second will collocate master
>>>>>>>>>> and
>>>>>>>>>> a group, third one will place group and master to the desired
>>>>>>>>>> node.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Yes, I bases my rules on yours, but I can't update my config with
>>>>>>>>> your
>>>>>>>>> rules
>>>>>>>>> directly.
>>>>>>>>> <rsc_order id="drbd0_before_myGroup" first="ms-drbd0"
>>>>>>>>> then="mail_Group"
>>>>>>>>> then-action="start" first-action="promote"/>
>>>>>>>>>
>>>>>>>>> This could be like:
>>>>>>>>> <rsc_order id="drbd0_before_myGroup" from="mail_Group"
>>>>>>>>> action="start"
>>>>>>>>> to="ms-drbd0" to_action="promote"/>
>>>>>>>>>
>>>>>>>>> What is the version of your heartbeat ? My 2.99.1 heartbeat didn't
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> It's processed by pacemaker, not heartbeat. That rule worked all
>>>>>>>> right
>>>>>>>> under 0.6, 0.7, 1.0:
>>>>>>>>
>>>>>>>> Refresh in 3s...
>>>>>>>>
>>>>>>>> ============
>>>>>>>> Last updated: Mon Oct 27 14:52:47 2008
>>>>>>>> Current DC: fc-node2 (ad6f19b7-228a-48b7-bae0-f95a838bde2a)
>>>>>>>> 2 Nodes configured.
>>>>>>>> 3 Resources configured.
>>>>>>>> ============
>>>>>>>>
>>>>>>>> Node: fc-node1 (b88f98c6-50f2-463a-a6eb-51abbec645a9): online
>>>>>>>> Node: fc-node2 (ad6f19b7-228a-48b7-bae0-f95a838bde2a): online
>>>>>>>>
>>>>>>>> Full list of resources:
>>>>>>>>
>>>>>>>> Clone Set: DoFencing
>>>>>>>>  child_DoFencing:0   (stonith:external/xen0):        Started
>>>>>>>> fc-node1
>>>>>>>>  child_DoFencing:1   (stonith:external/xen0):        Started
>>>>>>>> fc-node2
>>>>>>>> Master/Slave Set: ms-drbd0
>>>>>>>>  drbd0:0     (ocf::heartbeat:drbd):  Master fc-node1
>>>>>>>>  drbd0:1     (ocf::heartbeat:drbd):  Started fc-node2
>>>>>>>> Resource Group: myGroup
>>>>>>>>  myIP        (ocf::heartbeat:IPaddr):        Started fc-node1
>>>>>>>>  fs0 (ocf::heartbeat:Filesystem):    Started fc-node1
>>>>>>>>  myPgsql     (ocf::heartbeat:pgsql): Started fc-node1
>>>>>>>>
>>>>>>>> [root at fc-node1 crm]# rpm -qa | grep pacemaker
>>>>>>>> libpacemaker3-1.0.0-2.1
>>>>>>>> pacemaker-1.0.0-2.1
>>>>>>>> [root at fc-node1 crm]#
>>>>>>>>
>>>>>>>>
>>>>>>>> What error do you get?
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> I can update the configuration now. I have Heartbeat 2.99.1 +
>>>>>>> Pacemaker
>>>>>>> 1.0.
>>>>>>> Bur now, I can't put Master on the node. Have you check fc-node2 as a
>>>>>>> master
>>>>>>> node?
>>>>>>>
>>>>>>> How are you using pingd ? As a clone instance or  configured in ha.cf
>>>>>>> ?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> pingd is broken in 1.0 :-( Andrew fixed it in the latest dev release.
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> OK, but Adrew said me this morning that bug was fixed in last stable
>>>>> code. I
>>>>> have downloaded Pacemaker-1-0-79d2ba7e502f but pingd seems broken as
>>>>> well.
>>>>> If I delete the pingd rule Group is starting but if I don't delete the
>>>>> rule
>>>>> the Group is not starting.
>>>>>
>>>>> Another thing  is the master selection, it is wrong in my case, using
>>>>> your
>>>>> config Sergei. Could you try changing the master node from fc-node1 and
>>>>> fc-node2 ?
>>>>>
>>>>> Thank you!
>>>>>
>>>>>
>>>>
>>>> I have no problems with moving master to fc-node2. JUST A simple
>>>> change in the prefNode rsc_location rule:
>>>>
>>>>     <rsc_location id="primNode" rsc="myGroup">
>>>>       <rule id="prefered_primNode" score="1000">
>>>>         <expression attribute="#uname" id="prefNode" operation="eq"
>>>> value="fc-node2"/>
>>>>       </rule>
>>>>
>>>>
>>>
>>> OK, I understand the rule but is it working for you ? For me it is not
>>> working.
>>>
>>
>> Yes it does:
>>
>> Refresh in 13s...
>>
>> ============
>> Last updated: Tue Oct 28 13:15:53 2008
>> Current DC: fc-node2 (ad6f19b7-228a-48b7-bae0-f95a838bde2a)
>> 2 Nodes configured.
>> 3 Resources configured.
>> ============
>>
>> Node: fc-node1 (b88f98c6-50f2-463a-a6eb-51abbec645a9): online
>> Node: fc-node2 (ad6f19b7-228a-48b7-bae0-f95a838bde2a): online
>>
>> Clone Set: DoFencing
>>    child_DoFencing:0   (stonith:external/xen0):        Started fc-node1
>>    child_DoFencing:1   (stonith:external/xen0):        Started fc-node2
>> Master/Slave Set: ms-drbd0
>>    drbd0:0     (ocf::heartbeat:drbd):  Started fc-node1
>>    drbd0:1     (ocf::heartbeat:drbd):  Master fc-node2
>> Resource Group: myGroup
>>    myIP        (ocf::heartbeat:IPaddr):        Started fc-node2
>>    fs0 (ocf::heartbeat:Filesystem):    Started fc-node2
>>    myPgsql     (ocf::heartbeat:pgsql): Started fc-node2
>>
>> Can you show your cib.xml once more? BTW, are you sure that your apps
>> can start on that second node? What's in the log file?
>>
>
> Yes, all apps are OK , pingd is not working and the Master node isn't which
> I selected it. I attached my config but I don't see any error.... I feel
> very silly.. I don't know why is the reason...
>
> I compilled this:
> http://hg.clusterlabs.org/pacemaker/stable-1.0/archive/c83061c2f931.tar.bz2
> and http://hg.clusterlabs.org/pacemaker/stable-1.0/archive/tip.tar.bz2 with
> same result.
> and this: http://hg.linux-ha.org/dev/archive/4bbe943cf36c.tar.bz2
>
> What are the packages I need ?
>>
>>
>>>
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>>
>>
>>
>
>
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-- 
Serge Dubrouski.