Implement DNS-based PING ------------------------ Key: JGRP-2139 URL: https://issues.jboss.org/browse/JGRP-2139 Project: JGroups Issue Type: Enhancement Environment: * OpenShift and Kubernetes (service discovery is done using SRV records) * Any other environment that use {{A}} or {{SRV}} DNS records Reporter: Sebastian Łaskawiec Assignee: Sebastian Łaskawiec Fix For: 4.0.2 DNS Discovery might be very useful in Cloud environments (such as Kubernetes or OpenShift). They expose Services (which act as Load Balancers and Clustered Virtual IPs for Pods (Docker Containers)) with DNS {{SRV}} entries using the following scheme: {{_port._proto.ENDPOINT.service.namespace.sv.cluster.local}} (see [this issue|https://github.com/kubernetes/kubernetes/issues/29420] for more information). The implementation should also allow the following: * Change the DNS Server address * Change or override TTL values * Change DNS record type (either {{A}} or {{SRV}} ** If the record type is {{SRV}}, it should also allow parting port The implementation might be based on Oracle DNS tutorial: http://docs.oracle.com/javase/7/docs/technotes/guides/jndi/jndi-dns.html