Add TiCI support to TidbCluster with TiFlash integration and example

[3pointer]

Summary

This PR adds TiCI (meta/worker) as a first‑class component in TidbCluster, wires it into the controller sync loop, integrates TiFlash with TiCI config, and provides an end‑to‑end example (including MinIO + FTS verification) for local testing.

For more details about how to run tici via tidb-operator: please refer to examples/tici/readme.md

Key Changes

• API/Spec/Status
  • Added TiCI spec/status, new member types, labels, defaulting, and validation.
• Controller/Manager
  • New TiCI member manager to create services, configmaps, and statefulsets for meta/worker.
  • Integrated TiCI sync into the control loop.
• TiFlash integration
  • Injected TiCI config into TiFlash; reader now binds to a literal IP and advertises the pod DNS.
  • Added log routing option to stdout for searchlib.
• Volumes
  • Added TiCI member types to volume modifier.
  • Avoided PVC VolumeName lookups when unset.
• Examples
  • New examples/tici/ with tici-tc.yaml and README (MinIO + FTS verification flow).

##Testing

• Not run in CI.
• Manual verification flow documented in examples/tici/README.md.

Notes / Operational Considerations

• TiFlash TiCI reader requires a literal bind address; hostname-only addresses cause startup failures.
• On kind/podman, pod PID limits must be removed (TasksMax/infinity) to avoid newosproc.
• If reusing old TiFlash PVs, PD may reject duplicated store addresses; wipe PVC or delete the store.

Follow‑ups

• Consider formalizing TiCDC changefeed creation for TiCI if desired.
• Add unit tests for TiCI manager and config rendering.

[ti-chi-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[codecov-commenter]

Codecov Report

❌ Patch coverage is 5.76471% with 801 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (release-1.x@9ab6710). Learn more about missing BASE report.

Additional details and impacted files

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##             release-1.x    #6699   +/-   ##
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  Files                  ?      266           
  Lines                  ?    39210           
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  Hits                   ?    22124           
  Misses                 ?    15002           
  Partials               ?     2084           

Flag	Coverage Δ
unittest	56.42% <5.76%> (?)

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[liubog2008]

please submit pr to release-1.x

[liubog2008]

/run-all-tests

[csuzhangxc]

/run-all-tests

[ti-chi-bot]

@3pointer: 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
pull-e2e-kind-dmcluster	32b7a77	link	false	/test pull-e2e-kind-dmcluster
pull-e2e-kind-basic	32b7a77	link	false	/test pull-e2e-kind-basic
pull-e2e-kind-scale-simultaneously	32b7a77	link	false	/test pull-e2e-kind-scale-simultaneously
pull-e2e-kind-tidbcluster	32b7a77	link	false	/test pull-e2e-kind-tidbcluster
pull-e2e-kind-across-kubernetes	32b7a77	link	false	/test pull-e2e-kind-across-kubernetes
pull-e2e-kind-tngm	32b7a77	link	false	/test pull-e2e-kind-tngm
pull-e2e-kind-serial	32b7a77	link	false	/test pull-e2e-kind-serial
pull-e2e-kind-br	32b7a77	link	false	/test pull-e2e-kind-br

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[csuzhangxc]

/run-pull-e2e-kind

[csuzhangxc]

/run-pull-e2e-kind-across-kubernetes

[csuzhangxc]

/run-pull-e2e-kind-br

[csuzhangxc]

/run-pull-e2e-kind-tikv-scale-simultaneously

[csuzhangxc]

/run-pull-e2e-kind

[csuzhangxc]

/run-pull-e2e-kind-br

[csuzhangxc]

/run-pull-e2e-kind-across-kubernetes

[csuzhangxc]

/run-pull-e2e-kind-tikv-scale-simultaneously

[csuzhangxc]

/run-pull-e2e-kind

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: csuzhangxc, JaySon-Huang

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2026-02-25 12:25:18.222700271 +0000 UTC m=+271390.737494870: ☑️ agreed by csuzhangxc.