emqx4.3/examples/cluster-with-dns.conf.example

##--------------------------------------------------------------------
## Cluster in service discovery via DNS SRV records mode
##
## Configs to instruct how individual nodes can discover each other
##--------------------------------------------------------------------
## Note: This is an example of how to configure this feature
##       you should copy and paste the below data into the emqx.conf for working

cluster {
    ## Human-friendly name of the EMQX cluster.
    name = emqxcl

    ## Service discovery method for the cluster nodes
    discovery_strategy = dns

    ## List of core nodes that the replicant will connect to
    core_nodes = ["emqx1@192.168.0.1", "emqx2@192.168.0.2"]

    ## Remove disconnected nodes from the cluster after this interval
    autoclean = 5m

    ## If true, the node will try to heal network partitions automatically
    autoheal = true

    dns {
      ## The domain name from which to discover peer EMQX nodes' IP addresses
      name = localhost

      ## DNS record type
      ## Type: enum: a | srv
      record_type = a
     }
 }