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

Fri Jun 13 08:41:09 UTC 2014

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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> 
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