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Description

After sub-chart ingress-nginx upgrade to 4.13.0, a new rule was added in the configuration.
Since our values override buffer size, so need to align with new rule.

  Error: exit status 1
  2025/07/09 13:20:11 [emerg] 22#22: "proxy_busy_buffers_size" must be equal to or greater than the maximum of the value of "proxy_buffer_size" and one of the "proxy_buffers" in /tmp/nginx/nginx-cfg3915377558:1235
  nginx: [emerg] "proxy_busy_buffers_size" must be equal to or greater than the maximum of the value of "proxy_buffer_size" and one of the "proxy_buffers" in /tmp/nginx/nginx-cfg3915377558:1235
  nginx: configuration file /tmp/nginx/nginx-cfg3915377558 test failed

Related to kubernetes/ingress-nginx#13598

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

PR Type

Bug fix

Description

• Add missing proxy-busy-buffers-size annotation to ingress-nginx configuration

• Fix nginx configuration validation error after ingress-nginx upgrade to 4.13.0

• Align buffer size annotations with new ingress controller requirements

Changes diagram

flowchart LR
  A["ingress-nginx 4.13.0"] --> B["New buffer validation rule"]
  B --> C["Add proxy-busy-buffers-size annotation"]
  C --> D["Fix nginx configuration error"]

Changes walkthrough 📝

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