[ClusterLabs] qdevice up and running -- but questions

[Eric Robinson]

> -----Original Message-----
> From: Jan Friesse <jfriesse at redhat.com>
> Sent: Tuesday, April 14, 2020 2:43 AM
> To: Cluster Labs - All topics related to open-source clustering welcomed
> <users at clusterlabs.org>; Sherrard Burton <sb-clusterlabs at allafrica.com>;
> Eric Robinson <eric.robinson at psmnv.com>
> Subject: Re: [ClusterLabs] qdevice up and running -- but questions
>
> >
> >
> > On 4/11/20 6:52 PM, Eric Robinson wrote:
> >>  1. What command can I execute on the qdevice node which tells me
> >> which
> >>     client nodes are connected and alive?
> >>
> >
> > i use
> > corosync-qnetd-tool -v -l
> >
> >
> >>  2. In the output of the pcs qdevice status command, what is the
> >> meaning of...
> >>
> >>          Vote:                   ACK (ACK)
>
> This is documented in the corosync-qnetd-tool man page.
>
> >>
> >>  3. In the output of the  pcs quorum status Command, what is the
> >> meaning of...
> >>
> >> Membership information
> >>
> >> ----------------------
> >>
> >>      Nodeid      Votes    Qdevice Name
> >>
> >>           1          1    A,V,NMW 001db03a
> >>
> >>           2          1    A,V,NMW 001db03b (local)
>
> Pcs just displays output of corosync-quorumtool. Nodeid and votes columns
> are probably obvious, name is resolved reverse dns name of the node ip
> addr (-i suppress this behavior) and qdevice column really needs to be
> documented, so:
> A/NA - Qdevice is alive / not alive. This is rather internal flag, but it can be
> seen as a heartbeat between qdevice and corosync. Should be always alive.
> V/NV - Qdevice has cast voted / not cast voted. Take is a an ACK/NACK.
> MW/NMW - Master wins / not master wins. This is really internal flag. By
> default corosync-qdevice newer asks for master wins so it is going to be
> nmw. For more information what it means see
> votequorum_qdevice_master_wins (3)
>
> Honza

[Eric] This is super helpful information, thank you.
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