Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

config k8s cluster as following.
ipFamilyPolicy: PreferDualStack
ipFamilies:

IPv6
IPv4

Config tc as followings:
spec:
preferIPv6: true
tlsCluster:
enabled: true
version: master
...

deploy it in the k8s cluster.

2. What did you expect to see? (Required)

tiflash works fine.

3. What did you see instead (Required)

tiflash can't startup.
➜ ~ kubectl -n user-py get pod
NAME READY STATUS RESTARTS AGE
basic-discovery-7c5945c84d-bmdb5 1/1 Running 0 136m
basic-monitor-0 4/4 Running 0 139m
basic-pd-0 1/1 Running 0 136m
basic-pd-1 1/1 Running 0 136m
basic-pd-2 1/1 Running 0 136m
basic-tidb-0 2/2 Running 0 135m
basic-tidb-1 2/2 Running 0 135m
basic-tiflash-0 3/4 CrashLoopBackOff 28 122m
basic-tiflash-1 3/4 CrashLoopBackOff 28 122m

4. What is your TiFlash version? (Required)

master