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Pull request overview
Updates the Kubernetes “run MCP” guide to clarify why Redis is important when scaling backend replicas by documenting how the proxy runner performs session-aware routing to backend pods.
Changes:
- Added a “Session routing for backend replicas” subsection explaining Redis-backed session-to-pod routing, NAT pitfalls with client-IP affinity, and behavior on backend pod replacement.
- Merged the previous standalone
SessionStorageWarningnote into the new routing explanation so thebackendReplicasimplications are explicit. - Updated the Redis session storage link to point at a specific in-page anchor.
Users scaling backendReplicas > 1 had no explanation of why Redis is needed or how the proxy runner routes sessions to backend pods. - Add a "Session routing for backend replicas" subsection explaining that the proxy runner uses Redis to store session-to-pod mappings, what happens when a backend pod restarts, and why client-IP affinity alone is unreliable behind NAT - Absorb the standalone SessionStorageWarning note into the new subsection so the backendReplicas implication is explicit - Update Redis link to point directly to the horizontal scaling anchor Closes #708 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
jerm-dro
approved these changes
Apr 14, 2026
danbarr
requested changes
Apr 14, 2026
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danbarr
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In the PR description you mentioned adding an anchor link to a new heading introduced in the unmerged #709. But the link is not actually present in this PR. Suggest making this one a draft dependent on 709, then add the anchor once it's present.
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| table is invalidated and the next request reconnects to an available pod — | ||
| sessions are not automatically migrated between pods. |
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Suggested change
| table is invalidated and the next request reconnects to an available pod — | |
| sessions are not automatically migrated between pods. | |
| table is invalidated and the next request reconnects to an available pod. | |
| Sessions are not automatically migrated between pods. |
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Summary
run-mcp-k8s.mdxdocumentedbackendReplicasbut gave no explanation of why Redis matters for backend scaling or how the proxy runner routes sessions to pods. Users could misconfigure or skip Redis when only scaling backends.SessionStorageWarningnote into the new subsection so thebackendReplicasimplication is explicit rather than buried#horizontal-scaling-session-storage(added in Add horizontal scaling Redis session storage guide #709)Test plan
Closes #708
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