[pgpool-general: 6785] Re: VIP and quorum
ishii at sraoss.co.jp
Tue Nov 19 12:58:57 JST 2019
Can you please take a look at this?
SRA OSS, Inc. Japan
> Hi all,
> I am testing pgpool 4.1.0 and ended up in something I found inconsistent.
> This is the description of the delegate_IP parameter in 4.1:
>> Specifies the virtual IP address (VIP) of Pgpool-II that is connected
> from client servers (application servers etc.). When a Pgpool-II is
> switched from standby to active, the Pgpool-II takes over this VIP. If
> on (the default), VIP will not be brought up in case the quorum does not
> exist. Default is ''(empty): which means virtual IP will never be brought
> The part that explains about failover_require_consensus says that if this
> parameter is enabled then VIP will not be claimed if quorum does NOT exist.
> I assume that if I DISABLE this parameter then VIP will be claimed even
> there is no quorum.
> However, when testing with a 3 nodes cluster and failover_require_consensus
> disabled, when I shutdown two nodes the third one doesn't claim the VIP.
> This is what the log states:
>> LOG: I am the cluster leader node but we do not have enough nodes in
>> DETAIL: waiting for the quorum to start escalation process
> In fact, I checked the source code and found no relationship between
> and escalation.
> I'm not complaining about the behavior, just that it seems inconsistent
> with what the doc states. Or perhaps I misunderstood it.
> Rafael Castro.
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