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From Szalay-Bekő Máté <szalay.beko.m...@gmail.com>
Subject Re: Side affects of setting quorumListenOnAllIPs to true
Date Mon, 15 Jun 2020 06:39:23 GMT
Hi Ram,

I am not sure I understand your question. The config quorumListenOnAllIPs
is about to specify if the ports ZooKeeper uses for Server-to-server
communication should bind on the specified address/IP
(quorumListenOnAllIPs=false) or on (quorumListenOnAllIPs=true).

An example: You configure your server list using either static or dynamic
configuration like:

In this case when server.2 starts, it reads the config then initiates
connection (for ZK internal leader election protocol) to server.1 by
connecting to a.foo.com:3888 and sending it's own address (b.foo.com:3888)
enabling server.1 to connect back. However, if server.2 is behind a proxy /
using kubernetes / whatever, then it is possible that you can reach
server.2 as b.foo.com but the ZK process on server.2 can not actually bind
on b.foo.com:3888. In this case the easiest solution is to bind on However, you can not set in the config file of
server 2, since in this case server.2 would send in the
initial message to server.1 and server.1 would try to connect back to
server.2 using what is a bad idea. So in this case it comes
handy to set quorumListenOnAllIPs=true which will cause ZooKeeper to bind
on and still send a 'valid' address in the initial message, an
address where other servers can reach it.

I hope the explanation made it more (and not less) clear :p

Kind regards,

On Fri, Jun 12, 2020 at 7:42 PM rammohan ganapavarapu <
rammohanganap@gmail.com> wrote:

> Hi,
> I am trying to see what are the pros and cons of setting
> quorumListenOnAllIPs to true. Running zookeeper cluster in mtls or local
> proxy environments is not working by keeping default value (false). So can
> someone please explain?
> Any way zookeeper will form quorum with the servers list from the zoo.conf
> static file right? so by enabling this property can any server or IP out of
> the zoo.conf can join the quorum?
> Ram

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