asm/WARN/2023_001
Product: Anthos Service Mesh
Rule class: WARN - Something that is possibly wrong
Description
Envoy proxies running as istio side car proxies in Anthos Service mesh communicate to control plane with gRPC stream. These streams are regulalry closed every 30secs if there is no update from the control plane. These connections are flused and log entries are creted in proxies.
In an event where these warning are quite often within 30sec, it indicate a possible issue with control plane.
Remediation
You can use the following step by step guide to troubleshoot Anthos service mesh https://cloud.google.com/service-mesh/docs/troubleshooting/troubleshoot-intro