NETOBSERV-1248: shared k8s cache

[jotak]

The goal is to allow deploying a dedicated FLP instance as just a k8s cache component, alongside with the "traditional" FLP deployments.
The k8s cache is a Kafka producer, and traditional instances are
consumers.

• New FLP binary, k8s-cache, that just starts the informers and writes update events to
  Kafka
• New optional config for kubernetes enrichment, allowing to read from
  kafka instead of using informers

cf #641

Operator PR: netobserv/network-observability-operator#684

[openshift-ci]

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[openshift-ci]

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[openshift-ci-robot]

@jotak: This pull request references NETOBSERV-1248 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the spike to target the "4.17.0" version, but no target version was set.

In response to this:

Proof-of-concept that allows re-using the Kafka deployment for sharing transformed k8s meta-data from informers.

cf #641

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[openshift-ci-robot]

@jotak: This pull request references NETOBSERV-1248 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the spike to target the "4.17.0" version, but no target version was set.

In response to this:

Proof-of-concept that allows re-using the Kafka deployment for sharing transformed k8s meta-data from informers.

cf #641

Operator PR: netobserv/network-observability-operator#684

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[openshift-ci-robot]

@jotak: This pull request references NETOBSERV-1248 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the spike to target the "4.17.0" version, but no target version was set.

In response to this:

The goal is to allow deploying a dedicated FLP instance as just a k8s cache component, alongside with the "traditional" FLP deployments.
The k8s cache is a Kafka producer, and traditional instances are
consumers.

• New FLP binary, k8s-cache, that just starts the informers and writes update events to
  Kafka
• New optional config for kubernetes enrichment, allowing to read from
  kafka instead of using informers

cf #641

Operator PR: netobserv/network-observability-operator#684

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[codecov]

Codecov Report

Attention: Patch coverage is 48.22695% with 219 lines in your changes missing coverage. Please review.

Project coverage is 63.97%. Comparing base (caf7ac2) to head (f91a734).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #681      +/-   ##
==========================================
- Coverage   65.07%   63.97%   -1.11%     
==========================================
  Files         106      112       +6     
  Lines        6806     6984     +178     
==========================================
+ Hits         4429     4468      +39     
- Misses       2063     2193     +130     
- Partials      314      323       +9     

Flag	Coverage Δ
unittests	63.97% <48.22%> (-1.11%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
pkg/api/transform_network.go	100.00% <ø> (ø)
pkg/pipeline/utils/exit.go	100.00% <100.00%> (ø)
pkg/pipeline/encode/encode_kafka.go	65.51% <50.00%> (+8.16%)	⬆️
pkg/pipeline/ingest/ingest_kafka.go	56.98% <83.33%> (-5.91%)	⬇️
...e/transform/kubernetes/informers/informers-mock.go	93.25% <91.89%> (-3.26%)	⬇️
pkg/pipeline/transform/kubernetes/model/model.go	69.23% <69.23%> (ø)
pkg/pipeline/transform/transform_network.go	66.44% <16.66%> (-1.37%)	⬇️
pkg/pipeline/transform/kubernetes/enrich.go	69.90% <66.66%> (-7.28%)	⬇️
pkg/kafka/reader.go	72.05% <72.05%> (ø)
pkg/kafka/writer.go	52.27% <52.27%> (ø)
... and 4 more

... and 1 file with indirect coverage changes