[Pacemaker] Re: Understanding rules: location, colocation, order. Using with Master/Slave
Adrian Chapela
achapela.rexistros at gmail.com
Tue Oct 28 14:31:20 EDT 2008
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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