Make autodiscovery work based on SVC names and/or FQDN

[xrow]

Problem: If the target endpoint is set to an name based value either a FQDN or a SVC name the member autodiscovery doen work. Though it does work when using a IP based host name target-endpoints: "XX.239.105.XX:30XXX"

The reason for this request is a simplyfied setup for HA.

[leszko]

@xrow , target endpoint, do you mean:

• WAN Replication?
• Client Configuration?

DNS resolution works fine with the Hazelcast client. So you can put FQDN or SVC in the Hazelast client and it will successfully find the cluster.

Regarding WAN Replication, it is a general issue with Hazelcast that it does not resolve DNSes correctly. That's the related GH Issue: https://github.com/hazelcast/hazelcast-enterprise/issues/3627

[xrow]

Can see hazelcast/hazelcast-enterprise#3627, but it sound like this is the one i am talking about.

[Holmistr]

@xrow Just to make sure, so the issue is happening when you're using WAN replication?

[xrow]

this is correct.

[Holmistr]

@xrow I see, thank you. In that case, let me comment on it.
Working with hostnames in WAN replication is our long standing issue. However, it's not trivial at all to fix. Therefore, we are scheduling it for the next version of IMDG, which is very very roughly targeted to early Q2 2021.

[brettcurtis]

Any update on this? I'd like to use a DNS name in my helm chart for

hazelcast.yaml.hazelcast.wan-replication.wanPublisherRegional.batch-publisher.regional-publisher.target-endpoints

[Holmistr]

@brettcurtis Actually yes! In recently released Hazelcast Platform 5.1, we've done many improvements with the usage of hostnames, especially around WAN replication. Could you give it a try and see if it works for your usecase? Hopefully it should.