Changing Domain Connection Config

Questions
1

Suppose I have a participant already connected to a domain. Now I’ve set up a sequencer replica and want to activate client-side load balancing. How do I change the domain connection configuration from one URL to two?

2

Same question for mediator and domain manager. Do I just overwrite it using

mediator.sequencer_connection.set(???)

And for the domain manager?

3

For a participant:

participant1.domains.modify("sequencer1", _.addConnection("http://localhost:4411"))

For Mediator and Domain Manager:

{
import com.digitalasset.canton.networking.Endpoint
val endpoint1 = Endpoint("localhost", Port.tryCreate(4401))
val endpoint2 = Endpoint("localhost", Port.tryCreate(4411))
import com.digitalasset.canton.sequencing.GrpcSequencerConnection
import com.daml.nonempty.NonEmpty
val grpcConnWithBoth = GrpcSequencerConnection(
    NonEmpty(Seq, endpoint1, endpoint2),
    false,
    None,
  )
mediator.sequencer_connection.set(grpcConnWithBoth)
}
4

@bernhard , what about participant updating HA connection endpoint?

Do I need to participant2.domains.modify and then participant2.domains.connect_ha? and provide the endpoints twice in the two commands?

5

I got it working by using modify and reconnect()

@ participant2.domains.disconnect("remote-domain")

@ val endpoint1 = Endpoint("localhost", Port.tryCreate(10018)) 
endpoint1: Endpoint = Endpoint(host = "localhost", port = 10018)

@ val endpoint2 = Endpoint("localhost", Port.tryCreate(20018)) 
endpoint2: Endpoint = Endpoint(host = "localhost", port = 20018)


import com.daml.nonempty.NonEmpty
import com.digitalasset.canton.sequencing.GrpcSequencerConnection

@ val haConnection = GrpcSequencerConnection(NonEmpty(Seq, endpoint1, endpoint2), false, None) 

haConnection: GrpcSequencerConnection = GrpcSequencerConnection(
  endpoints = Seq(http://localhost:10018, http://localhost:20018),
  transportSecurity = false,
  customTrustCertificates = None()
)

@ participant2.domains.modify("remote-domain", _.copy(sequencerConnection = haConnection)) 

@ participant2.domains.reconnect("remote-domain")
1 Like
6

Hi @bernhard , Just noticed that connect_ha is deprecated. (Console Commands — Daml SDK 2.6.3 documentation)Should we use connect_multi instead? And what is the differences between the two?

7

Hi @Frankie , just use connect_multi instead. It was API tidy-up so connect_ha is an alias for connect_multi.