[ClusterLabs] Antw: [EXT] Re: Q: cryptic messages from "QB"

[Christine Caulfield]

On 25/11/2020 13:04, Ulrich Windl wrote:
>>>> Christine Caulfield <ccaulfie at redhat.com> schrieb am 25.11.2020 um 10:17
> in
> Nachricht <56738406-9222-a9f3-c57c-e30400a0b51c at redhat.com>:
>> On 25/11/2020 08:45, Ulrich Windl wrote:
>>> Hi!
>>>
>>> Setting up a cluster in SLES15 SP2, I wonder about a few log messages:
>>>
>>> 1) what does "QB" stand for?
>>>
>>> 2) When QB talks about "server", does it mean "service"?
>>> Examples:
>>> corosync[7982]:   [QB    ] server name: cmap
>>> corosync[7982]:   [QB    ] server name: cfg
>>> corosync[7982]:   [QB    ] server name: cpg
>>> corosync[7982]:   [QB    ] server name: votequorum
>>> corosync[7982]:   [QB    ] server name: quorum
>>>
>>> 3) what is "7982‑7987‑25" in "corosync[7982]:   [QB    ] Denied connection,
> is
>> not ready (7982‑7987‑25)"?
>>>
>>
>>
>> 2) "QB" is just how corosync tags messages that are issued by libqb ‑
>> which is the library that provides IPC services (mostly) to corosync
>> andothers. It's just logging the services that have been registered.
>>
>> 1) QB originally stood for "QuarterBack". I have no idea what that is
>> though I beleive it may be sport‑related. In the spec file for Fedora I
>> renamed it to "Quite Boring" as it's a library that provides basic
>> services ;‑)
>>
>> 3) That's just the unique name of the connection. it's made up of the
>> process PIDs and an incrementing number. The actual full IPC name in
>> /dev/shm has extra bits added on the end to stop them being guessable.
> 
> Thanks for confirming that it's all "Black Magic". ;-)
> 

Pretty much all of clustering is :P

Chrissie