Cannot resolve host "postgresql"; lookup postgresql on 10.23.0.05:53: no such host on rke2 cluster

[anishagoyal0504]

Hi Team,
I have deployed keycloak container image in kubernetes rke2 cluster with its own separate postgresql database?

in my case, both keycloak and postgresql are running in separate containers on different pods on the nodes and postgresql pod is running ok with its own clusterIP service on port 5432, when I deployed the keycloak pod and it is failing with the error below:

Cannot resolve host "postgresql"; lookup postgresql on 10.23.0.05:53: no such host

The above ip address indicated in the error is coredns IP which is also working fine. I have two pods

Not sure what causing this and how to resolve this

Any help will be be appreciated