The backend service warm-up using Ingress Gateway is not meeting expectations

[xlq20080808]

Is this the right place to submit this?

• This is not a security vulnerability or a crashing bug
• This is not a question about how to use Istio

Bug Description

I have a backend service that utilizes IngressGateway with warmup configured. The warmup window is set to 30 seconds, and locality load balancing is disabled. However, there seems to be an issue where the traffic warmup time for a pod is significantly greater than the configured 30 seconds.

The configuration for the VirtualService is as follows

trafficPolicy:
    loadBalancer:
      localityLbSetting:
        enabled: false
      warmupDurationSecs: 30s

Version

istio control plane version: 1.16.5
istio data plane version: 1.16.5

Additional Information

No response

[howardjohn]

Istio 1.16 is EOL. Please upgrade and see if the issue persists

[istio-policy-bot]

🚧 This issue or pull request has been closed due to not having had activity from an Istio team member since 2024-01-16. If you feel this issue or pull request deserves attention, please reopen the issue. Please see this wiki page for more information. Thank you for your contributions.

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