How can i migrate Cassandra and Zookeeper applications to a new VM on Edge On-Prem?
In order to accommodate higher traffic volumes, I would like to move my Cassandra and Zookeeper instances from its current shared VM to its own dedicated VM. My Cassandra and Zookeeper currently reside on a VM which also runs the Management Server, UI, and LDAP.
Is there any documented procedure for doing this kind of "migration?" The Apigee On-Prem Operations Guide PDF explains how to change the IP of Cassandra and Zookeeper instances, but nothing on migration.
Any insight would be very much appreciated!
Best, Chris
Hi @Chris Covney is this topology that you are currently using in production today or this is some non-prod environment? Typically Cassandra & Zookeeper should have a dedicated VM. @Chris von See / @Maruti Chand are you aware of any utilities to migrate existing instances?
Best Answer
I'm not aware of any utilities to facilitate moving Postgres and Zookeeper, but I think the process *should* be fairly straightforward... that said, it's probably even easier and less disruptive to API traffic to move the management server, UI and LDAP off of the C*/ZK system.
-- Add a new management server VM with MS, UI and OpenLDAP. Configure OpenLDAP for multi-master replication with the existing LDAP server.
-- Re-point the MS and UI DNS names to the new systems, or add a load balancer such that you can balance traffic across old and new VMs.
-- When things have settled down, remove the old MS and UI, and un-replicate and remove the old OpenLDAP.
Important note: I have not tried this myself, but based on what I know I believe that it will work. As always, backups are really useful :)
Hi Chris,
This is a very good alternative. We have moved forward with this and are working with @Dave Newman in the execution. Thanks everyone for all the helpful responses!
Best, Chris
