Hi after digging kubernetes internals, I’ve found out Centos 8 does not supports Iptables as legacy mode.
So my CNI was weave and it was using Iptables as legacy mode that’s why my pods cannot resolve k8ssandra-seed-service.
After fixing the resolution issue whole k8ssandra services worked as expected.
I am so appreciated for your attention.
Best regards,
Eren Cankurtaran