[SPARK-30513] Question about spark on k8s

• Type: Question
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 3.0.0
• Component/s: Kubernetes, Spark Core
• Assignee: Unassigned
• Reporter: Jackey Lee
• Created: 15/Jan/20 01:33
• Updated: 12/Dec/22 18:11
• Resolved: 23/Jan/20 02:21

Description

My question is, why we wrote the domain name of Kube-DNS in the code? Isn't
it better to read domain name from the service, or just use the hostname?

In our scenario, we run spark on Kata-like containers, and found the code
had written the Kube-DNS domain. If Kube-DNS is not configured in
environment, tasks would run failed.

Besides, kube-dns is just a plugin for k8s, not a required component for k8s. We can use better DNS services without necessarily using this.