Tiflash can't startup after enable tls and set preferIPv6 to True

[mayjiang0203]

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

[mayjiang0203]

/assign @ywqzzy
/severity major

[mayjiang0203]

tiflash logs `[2023/02/06 03:56:05.253 +00:00] [INFO] [mod.rs:126] ["encryption: none of key dictionary and file dictionary are found."] [2023/02/06 03:56:05.253 +00:00] [INFO] [mod.rs:509] ["encryption is disabled."] [2023/02/06 03:56:05.253 +00:00] [INFO] [run.rs:143] ["set raft-store proxy helper"] [2023/02/06 03:56:05.253 +00:00] [INFO] [run.rs:147] ["wait for engine-store server to start"] [2023/02/06 03:56:11.667 +00:00] [INFO] [run.rs:157] ["engine-store server is not running, make proxy exit"]`

Update: the logging posted here is not related to the reason tiflash can't startup.