[Solved] Upstream connect error or disconnect occurs after the k8s istio virtual machine is restarted

Error (common problem after virtual machine reboot):
upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: TLS error: 268436501:SSL routines:OPENSSL_internal:SSLV3_ALERT_CERTIFICATE_EXPIRED

The pods under istio-system are out of order, you need kubectl delete pods xxx -n istio-system to restart


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