SPL-290976: KVService controller flow for deployment

[sgontla]

Description

Adding KVService controller flow. This is still work in progress. Will bring in more pieces as we keep working on the upcoming stories.

Key Changes

Add support for K8s Deployment and pod updates for KVService.

Testing and Verification

KVService deployment comes up, but pod fails at this time, which is expected, as we need to bring in other supporting changes like the kvservice config in single tenant mode, and also needs db connectivity for the probes to succeed:

sgontla@sgk8s:~/specs$
NAME                                     READY   STATUS             RESTARTS       AGE
splunk-demo-kvservice-57dd65566f-c27jw   0/1     CrashLoopBackOff   6 (110s ago)   7m33s
splunk-demo-kvservice-57dd65566f-sbtbn   0/1     CrashLoopBackOff   6 (117s ago)   7m33s
splunk-demo-kvservice-57dd65566f-xzcnh   0/1     CrashLoopBackOff   6 (116s ago)   7m33s
sgontla@sgk8s:~/specs$

sgontla@sgk8s:~/specs$ k logs -f splunk-demo-kvservice-57dd65566f-c27jw
Service type is set to:  KvsCsp
{"level":"INFO","time":"2026-02-03T06:40:34.243Z","location":"restapi/configure_kvstore.go:124","message":"Starting service","service":"kvstore","hostname":"splunk-demo-kvservice-57dd65566f-c27jw","component":"kvstore-startup","requestId":"69819862b3e9ff0b298d0a1f","branch":"master","commit":"0.12.578","buildTime":"2026-01-13T03:00:12Z"}
{"level":"INFO","time":"2026-02-03T06:40:34.243Z","location":"tracer/tracer.go:18","message":"No distributed tracer enabled","service":"kvstore","hostname":"splunk-demo-kvservice-57dd65566f-c27jw","component":"kvstore-startup","requestId":"69819862b3e9ff0b298d0a1f"}
{"level":"FATAL","time":"2026-02-03T06:40:34.243Z","location":"cfg/config.go:466","message":"Missing required environment variable","service":"kvstore","hostname":"splunk-demo-kvservice-57dd65566f-c27jw","envVariable":"KVSERVICE_DB_SIZECHECKINTERVAL_SECONDS","error":"configuration error","callstack":"cd.splunkdev.com/core-services/kvstore/kvstore/cfg.GetenvRequired\n\t/home/sgontla/git/KVService/kvstore/kvstore/cfg/config.go:466\ncd.splunkdev.com/core-services/kvstore/kvstore/cfg.GetenvRequiredInt64\n\t/home/sgontla/git/KVService/kvstore/kvstore/cfg/config.go:479\ncd.splunkdev.com/core-services/kvstore/kvstore/cfg.UnmarshalWithPostgresVersion\n\t/home/sgontla/git/KVService/kvstore/kvstore/cfg/unmarshal.go:79\ncd.splunkdev.com/core-services/kvstore/kvstore/cfg.Unmarshal\n\t/home/sgontla/git/KVService/kvstore/kvstore/cfg/unmarshal.go:20\ncd.splunkdev.com/core-services/kvstore/kvstore/cfg.LoadCoreConfig\n\t/home/sgontla/git/KVService/kvstore/kvstore/cfg/config.go:376\ncd.splunkdev.com/core-services/kvstore/restapi.configureAPI\n\t/home/sgontla/git/KVService/kvstore/restapi/configure_kvstore.go:164\ncd.splunkdev.com/core-services/kvstore/restapi.(*Server).ConfigureAPI\n\t/home/sgontla/git/KVService/kvstore/restapi/server.go:59\nmain.main\n\t/home/sgontla/git/KVService/kvstore/cmd/kvstore-server/main.go:51\nruntime.main\n\t/home/sgontla/myGoProjects/pkg/mod/golang.org/toolchain@v0.0.1-go1.24.4.linux-amd64/src/runtime/proc.go:283"}

Related Issues

Jira tickets, GitHub issues, Support tickets...

PR Checklist

• Code changes adhere to the project's coding standards.
• Relevant unit and integration tests are included.
• Documentation has been updated accordingly.
• All tests pass locally.
• The PR description follows the project's guidelines.

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[sgontla]

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