[BUG] YurtHub did not support nf_conntrack_ipv4 module in CentOS 8.5.2111

[Sodawyx]

What happened: YurtHub network module is not ready when the deploy environment is CentOS 8.5.2111 (RedHat 8.5.0-4), the nf_conntrack_ipv4 module is not support to be adapted.

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?: Kuberenetes community has the similar issue https://github.com/kubernetes/kubernetes/issues/97052

Environment:

• OpenYurt version: 0.7.0
• Kubernetes version (use kubectl version): 1.19
• OS (e.g: cat /etc/os-release): CentOS 8.5.2111 (RedHat 8.5.0-4)
• Kernel (e.g. uname -a): 4.18.0-348.7.1.el8_5.x86_64 #1 SMP Wed Dec 22 13:25:12 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
• Install tools:
• Others:

others

/kind bug

[Sodawyx]

The issue can be avoid by add --enable-iptables=false argument when the yurtHub start-up.

[Sodawyx]

YurtHub log: Kube-proxy log:

[rambohe-ch]

@Sodawyx Thank you for raising issue. and i have want to know Yurthub pod can work or not when the above problem happened.