Is that really cattle though? Instead of sql01 I’d think a more cattle based name would be db01, db02 etc so it’s database agnostic. For the redis and rabbitmq, I’d think that’s more mq01, mq02, etc for generic message queue servers. Potentially I’m taking the analogy too far though
That's also valid but I like to know exactly what type of DB is running (SQLDB runs Mysql and Postgres Nodes for example) so I can quickly jump and find servers without much thinking.
db01 is taking it into meaninglessness. Is that running PostgreSQL, Redis or MongoDB? Was Redis on db05 or cache01? That's not far from naming them server01, server02, etc.
sql01 is good if you only use sql abstraction layers, otherwise you probably even want postgres01 and mysql01. Or even postgres-olap01 and postgres-oltp01, if that's what you do.
