[ClusterLabs] Antw: [EXT] Re: "Error: unable to fence '001db02a'" but It got fenced anyway

[Digimer]

On 2021-03-01 2:50 a.m., Ulrich Windl wrote:
>>>> Valentin Vidic <vvidic at valentin-vidic.from.hr> schrieb am 28.02.2021 um
> 16:59
> in Nachricht <20210228155921.GM29617 at valentin-vidic.from.hr>:
>> On Sun, Feb 28, 2021 at 03:34:20PM +0000, Eric Robinson wrote:
>>> 001db02b rebooted. After it came back up, I tried it in the other
> direction.
>>>
>>> On node 001db02b, the command...
>>>
>>> # pcs stonith fence 001db02a
>>>
>>> ...produced output...
>>>
>>> Error: unable to fence '001db02a'.
>>>
>>> However, node 001db02a did get restarted!
>>>
>>> We also saw this error...
>>>
>>> Failed Actions:
>>> * stonith‑001db02ab_start_0 on 001db02a 'unknown error' (1): call=70, 
>> status=Timed Out, exitreason='',
>>>     last‑rc‑change='Sun Feb 28 10:11:10 2021', queued=0ms, exec=20014ms
>>>
>>> When that happens, does Pacemaker take over the other node's resources, or
> 
>> not?
>>
>> Cloud fencing usually requires a higher timeout (20s reported here).
>>
>> Microsoft seems to suggest the following setup:
>>
>> # pcs property set stonith‑timeout=900
> 
> But doesn't that mean the other node waits 15 minutes after stonith until it
> performs the first post-stonith action?

No, it means that if there is no reply by then, the fence has failed. If
the fence happens sooner, and the caller is told this, recovery begins
very shortly after.

>> # pcs stonith create rsc_st_azure fence_azure_arm username="login ID"
>>   password="password" resourceGroup="resource group" tenantId="tenant ID"
>>   subscriptionId="subscription id"
>>  
> pcmk_host_map="prod‑cl1‑0:prod‑cl1‑0‑vm‑name;prod‑cl1‑1:prod‑cl1‑1‑vm‑name"
>>   power_timeout=240 pcmk_reboot_timeout=900 pcmk_monitor_timeout=120
>>   pcmk_monitor_retries=4 pcmk_action_limit=3
>>   op monitor interval=3600
>>
>>
> https://docs.microsoft.com/en‑us/azure/virtual‑machines/workloads/sap/high‑avai
> 
>> lability‑guide‑rhel‑pacemaker
>>
>> ‑‑ 
>> Valentin
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Digimer
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