Hi Sanaa, yes it's enough NOT having the "controller" role to be just an "observer". As soon as your node has "controller" role configured (in addition to "broker" or alone) it acts as a "voter" and then being a leader or "follower" based on the election result.
Thanks Paolo On Mon, 25 Mar 2024, 14:25 Sanaa Syed, <[email protected]> wrote: > Hi Paolo, > > If I'm understanding correctly, a kafka broker (aside from the controller > quorum) can be the observer? Do we need to set the process role to anything > in this case to indicate that we want a broker to be an observer? > > On Sun, Mar 24, 2024 at 3:01 PM Paolo Patierno <[email protected]> > wrote: > > > Hi Sanaa, > > in KRaft mode there is the role of "observer" which is typically taken by > > brokers as part of the data plane. The broker/observer can discover which > > node is the leader/active controller and fetches the metadata from it (as > > the "followers" in the KRaft quorum), but cannot vote and cannot become > > leader. > > AFAIK it's allowing to change its role at some point if needed to be > also a > > controller or anyway taking part at the quorum by also having the > metadata > > topic already replicated. > > > > Thanks > > Paolo > > > > On Sun, 24 Mar 2024, 19:05 Sanaa Syed, <[email protected]> > > wrote: > > > > > Hello, > > > > > > Currently in Zookeeper, there is the concept of an observer/dummy node > > that > > > can be used when scaling up a cluster ( > > > https://zookeeper.apache.org/doc/r3.4.13/zookeeperObservers.html). > > > > > > Is there an equivalent of an observer node in KRaft mode? Asking > because > > we > > > use the observer node for our stretched Kafka Clusters (6 zookeeper > nodes > > > across 3 clusters) and would like to find a direct replacement or come > up > > > with an alternative. > > > > > > Thank you, > > > Sanaa > > > > > > > > -- > Sanaa Syed >
