Setup an aerospike high-availbilty cluster? Are there any guide to set up an aerospike HA? I had search google but there was no possible result in return.

Look like Aerospike is not really popular in common.

P/s: Lab purpose so there only need 2-3 node/host
Aerospike's HA setup is one of the easiest. No need to setup sharding or failover policies. Everything is automatically taken care of. You just need to configure the nodes to see each other and boot them. I suggest to go with 'mesh' mode configuration. Ref: https://www.aerospike.com/docs/operations/configure/network/heartbeat/index.html