[wip] attempt pod addressability for the autoscaler

[dprotaso]

Changes

• change private K8s service to be a headless service
• test passthrough with autoscaler

[knative-prow]

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[dprotaso]

/test all

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.56%. Comparing base (2156812) to head (190c73c).
Report is 107 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15388      +/-   ##
==========================================
- Coverage   84.58%   84.56%   -0.02%     
==========================================
  Files         219      219              
  Lines       13587    13587              
==========================================
- Hits        11492    11490       -2     
- Misses       1726     1728       +2     
  Partials      369      369              

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[dprotaso]

/test all

[dprotaso]

/test ?

[knative-prow]

@dprotaso: The following commands are available to trigger required jobs:

• /test build-tests
• /test contour-latest
• /test contour-tls
• /test gateway-api-latest
• /test istio-latest-no-mesh
• /test istio-latest-no-mesh-tls
• /test kourier-stable
• /test kourier-stable-tls
• /test unit-tests
• /test upgrade-tests

The following commands are available to trigger optional jobs:

• /test gateway-api-latest-and-contour
• /test https
• /test istio-latest-mesh
• /test istio-latest-mesh-short
• /test istio-latest-mesh-tls
• /test performance-tests

Use /test all to run the following jobs that were automatically triggered:

• build-tests_serving_main
• istio-latest-no-mesh-tls_serving_main
• istio-latest-no-mesh_serving_main
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/test ?

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[dprotaso]

/test istio-latest-mesh
/test istio-latest-mesh-short
/test istio-latest-mesh-tls

[knative-prow]

@dprotaso: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
istio-latest-mesh-tls_serving_main	190c73c	link	false	/test istio-latest-mesh-tls
istio-latest-mesh-short_serving_main	190c73c	link	false	/test istio-latest-mesh-short
istio-latest-mesh_serving_main	190c73c	link	false	/test istio-latest-mesh

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[skonto]

Failed to probe clusterIP None:80 err=error roundtripping http://None:80/healthz: dial tcp: lookup None on 10.26.112.10:53: no such host

[dprotaso]

Yeah passthrough isn't enabled on the tests.

One thing though - I think we could do a headless service and do probing using the hostname instead of the cluster IP.

I'll do a separate PR for that

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