Converting a 3 node cloud to 1-node

[Jayadevan Maymala <ja...@ftltechsys.com>]

Hi all,
We have a Solr cluster (Version 7.3) with 3 nodes in production. We are
moving from one platform provider to another. Even after the move is
complete, I would like to keep the Solr cloud in the existing platform
running for a few weeks - just to compare search results, refer config
files etc. Since live searches won't be going to the existing cloud, and
availability is not critical, I would like to make it a one-node instance.
What are the steps to be followed? All our collections have 2 replicas,
they are not sharded. The Solr cloud uses a 3-node zookeeper ensemble. I
would like to move to a one-solr node, one-zookeeper set up.

A few things I can think of -
On node1 -
1) Edit /etc/default/solr.in.sh
ZK_HOST=
to refer only one server

2) Edit /opt/zookeeper/conf/zoo.cfg
and remove server.2 and server.3 entries.

Shutdown node2 and node 3. On node1, restart solr service, restart zookeeper
Anything else?

Regards,
Jayadevan