[ClusterLabs] Antw: Re: fencing on iscsi device not working

[Ulrich Windl]

>>> Ken Gaillot <kgaillot at redhat.com> schrieb am 05.11.2019 um 16:05 in
Nachricht
<d2e2114a48ef66535e11fe2fe5970d2bd687c83d.camel at redhat.com>:
> Coincidentally, the documentation for the pcmk_host_check default was
> recently updated for the upcoming 2.0.3 release. Once the release is
> out, the online documentation will be regenerated, but here is the
> text:
> 
> Default
> ‑‑‑‑‑‑‑
> static‑list if either pcmk_host_list or pcmk_host_map is set, otherwise
> dynamic‑list if the fence device supports the list action, otherwise
> status if the fence device supports the status action, otherwise none

I'd make that an itemized list with four items. I thinks it would be easer to
understand.

> 
> On Tue, 2019‑11‑05 at 11:01 +0100, wferi at niif.hu wrote:
>> Roger Zhou <ZZhou at suse.com> writes:
>> 
>> > On 11/3/19 12:56 AM, wferi at niif.hu wrote:
>> > 
>> > > Andrei Borzenkov <arvidjaar at gmail.com> writes:
>> > > 
>> > > > According to documentation, pcmk_host_list is used only if
>> > > > pcmk_host_check=static‑list which is not default, by default
>> > > > pacemaker
>> > > > queries agent for nodes it can fence and fence_scsi does not
>> > > > return
>> > > > anything.
>> > > 
>> > > The documentation is somewhat vague here.  The note about
>> > > pcmk_host_list
>> > > says: "optional unless pcmk_host_check is static‑list".  It does
>> > > not
>> > > state how pcmk_host_list is used if pcmk_host_check is the
>> > > default
>> > > dynamic‑list, 
>> > 
>> > The confusion might be because of "the language barrier".
>> > 
>> > My interpretation is like this:
>> > 
>> > 1. pcmk_host_list is used only if pcmk_host_check is static‑list.
>> > 
>> > 2. pcmk_host_check's default is dynamic‑list.
>> >     That means, by default pcmk_host_list is not used at all.
>> 
>> But this interpretation does not align with reality:
>> 
>> > > but I successfully use such setups with Pacemaker 1.1.16
>> > > with fence_ipmilan.
>> 
>> (I mean I don't set pcmk_host_check on my fence_ipmilan resources,
>> only
>> pcmk_host_list, and they work.)
>> 
>> Unless:
>> 
>> > > the behavior is different in 2.0.1 (the version in Debian
>> > > buster).
>> 
>> That's why I asked:
>> 
>> > > Ram, what happens if you set pcmk_host_check to static‑list?
>> 
>> Of course the developers are most welcome to chime in with their
>> intentions and changes concerning this, I haven't got the time to dig
>> into the core right now.  Tough I'm very much interested for my own
>> sake
>> as well, because I'm about to bring up a buster cluster with very
>> similar config.
> ‑‑ 
> Ken Gaillot <kgaillot at redhat.com>
> 
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