[Pacemaker] Pacemaker 1.1.12 cib testing, crm_mon doesn't work

Johan Huysmans johan.huysmans at inuits.be
Fri Jun 13 11:51:25 CEST 2014 

I tested with a custom build libqb rpm 
(libqb-0.17.0-1.15.f8b4.dirty.el6.x86_64) however that didn't solved the 
issue.
So for now I will add the export of the PCMK_ipc_buffer to my bash_profile.

thx
Johan


On 13-06-14 11:23, Johan Huysmans wrote:
> I exported the PCMK_ipc_buffer in my console before running the 
> crm_mon and everything worked.
> But I see this more as a workaround (could set this in my bash_profile).
>
> I currently have libqb-0.16.0-2.el6.x86_64 installed,
> which version should fix this ?
>
> Thanks!
> Johan H.
>
>
> On 13-06-14 10:41, Andrew Beekhof wrote:
>> On 13 Jun 2014, at 5:35 pm, Johan Huysmans<johan.huysmans at inuits.be>  wrote:
>>
>>> Hi,
>>>
>>> The PCMK_ipc_buffer was already set to 10000000 (10M).
>> Try setting that in your environment too (otherwise the CLI tools wont know about the new value).
>> Or grab a newer libqb which _should_ do the right thing anyway
>>
>>> For testing I increased to buffer to 10000000 (100M), without results.
>>>
>>> I decreased the buffer to the default 20480 (20K) as it then shows the suggested value.
>>> If I leave it running for a couple of minutes I got these suggested values:
>>> Jun 13 06:33:53 [62206] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (3854984 bytes suggested)
>>> Jun 13 06:33:54 [62206] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (7709968 bytes suggested)
>>> Jun 13 06:33:58 [62206] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (15419936 bytes suggested)
>>> Jun 13 06:35:55 [62206] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (30839872 bytes suggested)
>>> Jun 13 06:37:56 [62206] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (61679744 bytes suggested)
>>> Jun 13 07:16:47 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (3952852 bytes suggested)
>>> Jun 13 07:16:47 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (7905704 bytes suggested)
>>> Jun 13 07:18:03 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (15811408 bytes suggested)
>>> Jun 13 07:18:43 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (31622816 bytes suggested)
>>> Jun 13 07:18:48 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (63245632 bytes suggested)
>>> Jun 13 07:20:49 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (126491264 bytes suggested)
>>> Jun 13 07:22:50 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (252982528 bytes suggested)
>>> Jun 13 07:22:52 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (505965056 bytes suggested)
>>> Jun 13 07:23:57 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (1011930112 bytes suggested)
>>> Jun 13 07:24:51 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (2023860224 bytes suggested)
>>> Jun 13 07:26:52 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (-247246848 bytes suggested)
>>> Jun 13 07:27:22 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (-494493696 bytes suggested)
>>> Jun 13 07:29:22 [44112] SRV-5-1        cib:    error: crm_ipc_prepare:     Could not compress the message into less than the configured ipc limit (20480 bytes).Set PCMK_ipc_buffer to a higher value (-988987392 bytes suggested)
>>>
>>> There is definitely something wrong. Is it the printing of the suggested value or is it something else ?
>>>
>>> If I check the cib.xml files in /var/lib/pacemaker/cib/ all files are a bit smaller then 300K.
>>>
>>> Changing these buffers did not solve my problem not getting results from crm_mon.
>>>
>>> Gr.
>>> Johan
>>>
>>>
>>> On 13-06-14 01:13, Andrew Beekhof wrote:
>>>> On 12 Jun 2014, at 10:53 pm, Johan Huysmans<johan.huysmans at inuits.be>
>>>>   wrote:
>>>>
>>>>
>>>>> Hi All,
>>>>>
>>>>> I deployed Pacemaker 1.1.12-rc2 on our platform to test the cib changes.
>>>>> This was needed on our setup as it contains 6 nodes, 150 resources and the cib process was using lots of cpu.
>>>>>
>>>>> With a limited set of resources (6 nodes, 30 resources) everything worked as expected, including crm_mon.
>>>>> When loading the complete set of resources we lost the crm_mon functionality on all nodes.
>>>>> The cluster is running as expected (running all resources) however we don't have any visibility.
>>>>>
>>>>> I noticed that operations performing changes did actually work like (crm resource stop <resourcename>),
>>>>> but crm resource status didn't work (using crmsh-2.0+git46-1.1.x86_64).
>>>>>
>>>>> I noticed that /dev/shm/qb-cib_ro* files are created, and lsof shows that they are both opened by crm_mon and cib.
>>>>>
>>>>>
>>>>> When executing "crm_mon -1" I get following messages in /var/log/messages (and /var/log/pacemaker.log)
>>>>> Jun 12 12:47:38 [8062] SRV-5-1        cib:   notice: crm_ipcs_sendv:     Response 2 to 0x1810370[17836] (1091618 bytes) failed: Resource temporarily unavailable (-11)
>>>>> Jun 12 12:47:38 [8062] SRV-5-1        cib:  warning: do_local_notify:     Sync reply to crm_mon failed: No message of desired type
>>>>>
>>>>>
>>>>> Restarting the pacemaker and cman service of 1 node didn't solve it.
>>>>>
>>>>>
>>>>> What is causing this problem and how can I resolve it ?
>>>>>
>>>> Almost certainly you're hitting IPC limits associated with large clusters.
>>>>
>>>> You should be able to tune:
>>>>
>>>> # PCMK_ipc_buffer=20480
>>>>
>>>> In /etc/sysconfig/pacemaker and then restart the cluster.
>>>>
>>>> Note also:
>>>>
>>>> # For non-systemd based systems, prefix 'export' to each enabled line
>>>>
>>>>
>>>>
>>>>
>>>>
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