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add annotations for fixing 502 status code #527

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merged 3 commits into from
Dec 14, 2024

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klinch0
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@klinch0 klinch0 commented Dec 13, 2024

Summary by CodeRabbit

  • New Features
    • Enhanced ingress settings for Kubeapps deployment, allowing for increased timeout and body size limits.
    • Added configuration options for handling larger requests and longer processing times.

@klinch0 klinch0 requested a review from kvaps as a code owner December 13, 2024 11:29
@dosubot dosubot bot added the size:XS This PR changes 0-9 lines, ignoring generated files. label Dec 13, 2024
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Review failed

The pull request is closed.

Walkthrough

The changes introduce a new ingress section under the kubeapps configuration in the values.yaml file. This section includes several annotations that specify NGINX ingress settings, including timeout and body size limits. These modifications enhance the ingress controller's configuration for the Kubeapps deployment.

Changes

File Path Change Summary
packages/system/dashboard/values.yaml Added ingress section under kubeapps with annotations for NGINX ingress configuration:
- nginx.ingress.kubernetes.io/proxy-read-timeout: "600"
- nginx.ingress.kubernetes.io/client-max-body-size: "1m"
- nginx.ingress.kubernetes.io/proxy-body-size: "100m"
- nginx.ingress.kubernetes.io/proxy-buffer-size: "16k"
- nginx.ingress.kubernetes.io/proxy-buffers-number: "4"

Suggested reviewers

  • xy2
  • kvaps

Poem

In the land of code where rabbits play,
New settings bloom in a bright array.
With timeouts long and sizes grand,
Kubeapps dances, just as planned!
Hopping high with NGINX cheer,
Bigger requests, no need to fear! 🐇✨

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Reviewing files that changed from the base of the PR and between 8a0bc6c and 934edf2.

📒 Files selected for processing (1)
  • packages/system/dashboard/values.yaml (1 hunks)

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@dosubot dosubot bot added the bug Something isn't working label Dec 13, 2024
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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between e44bece and c2a0bec.

📒 Files selected for processing (1)
  • packages/system/dashboard/values.yaml (1 hunks)
🔇 Additional comments (2)
packages/system/dashboard/values.yaml (2)

2-8: Verify consistency with other ingress resources

These ingress annotations might need to be aligned with other services in the cluster for consistent behavior.

✅ Verification successful

Ingress annotations are consistent with other services

The verification shows that the ingress annotations in packages/system/dashboard/values.yaml are consistent with similar configurations found in other services:

  • The same set of annotations (proxy-body-size: 100m, proxy-buffer-size: 100m, proxy-buffers-number: "4") is used in packages/extra/ingress/templates/dashboard.yaml
  • Similar timeout settings are used in other services (e.g., Kubeapps uses proxy-read-timeout: "600")
  • Large body size configurations are common across services:
    • Dashboard: 100m
    • SeaweedFS: unlimited ("0")
    • Bucket service: unlimited ("0")

The values align with common practices for web applications requiring file uploads and long-running connections.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Search for similar ingress configurations in the codebase
echo "Searching for other ingress configurations..."
rg -l "ingress:" .

echo "Checking for existing nginx ingress annotations..."
rg -B2 -A2 "nginx\.ingress\.kubernetes\.io"

Length of output: 15018


4-4: Consider investigating root cause of timeouts

Setting proxy-read-timeout to 600 seconds (10 minutes) is quite high and might be masking underlying performance issues. While this may fix the 502 errors, it could lead to poor user experience.

Let's check if there are any related timeout configurations in the codebase:

Consider:

  1. Investigating why operations are taking so long
  2. Adding monitoring to track request durations
  3. Implementing progressive loading or pagination if dealing with large datasets

Comment on lines 5 to 8
nginx.ingress.kubernetes.io/client-max-body-size: 100m
nginx.ingress.kubernetes.io/proxy-body-size: 100m
nginx.ingress.kubernetes.io/proxy-buffer-size: 100m
nginx.ingress.kubernetes.io/proxy-buffers-number: "4"
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⚠️ Potential issue

Review memory implications of buffer settings

The buffer configuration raises some concerns:

  • Setting proxy-buffer-size to 100m seems excessive for a buffer size and could lead to high memory usage per connection
  • This combined with proxy-buffers-number: "4" means each connection could allocate up to 400MB of buffer space

Recommendations:

  1. Start with smaller buffer sizes (e.g., 8k-16k) and increase only if needed
  2. Consider using request/response streaming for large payloads
  3. Monitor memory usage after deployment

Suggested values:

 nginx.ingress.kubernetes.io/client-max-body-size: 100m
 nginx.ingress.kubernetes.io/proxy-body-size: 100m
-nginx.ingress.kubernetes.io/proxy-buffer-size: 100m
+nginx.ingress.kubernetes.io/proxy-buffer-size: 16k
 nginx.ingress.kubernetes.io/proxy-buffers-number: "4"
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
nginx.ingress.kubernetes.io/client-max-body-size: 100m
nginx.ingress.kubernetes.io/proxy-body-size: 100m
nginx.ingress.kubernetes.io/proxy-buffer-size: 100m
nginx.ingress.kubernetes.io/proxy-buffers-number: "4"
nginx.ingress.kubernetes.io/client-max-body-size: 100m
nginx.ingress.kubernetes.io/proxy-body-size: 100m
nginx.ingress.kubernetes.io/proxy-buffer-size: 16k
nginx.ingress.kubernetes.io/proxy-buffers-number: "4"

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Actionable comments posted: 1

🧹 Outside diff range and nitpick comments (2)
packages/system/dashboard/values.yaml (2)

5-6: Monitor resource usage with increased body size limits

The 100MB limit for both client and proxy body size is reasonable, but ensure you:

  1. Monitor memory usage across multiple concurrent large requests
  2. Consider implementing client-side file size validation
  3. Add appropriate documentation for API consumers about size limits

2-8: Implement comprehensive monitoring for ingress performance

While these annotations should help address 502 errors, consider implementing:

  1. Prometheus metrics for:
    • Request duration
    • Buffer utilization
    • Connection counts
  2. Alerting for timeout events
  3. Gradual tuning based on actual usage patterns
  4. Documentation of these limits in your API documentation

This will help validate the effectiveness of these changes and identify potential optimizations.

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between c2a0bec and 8a0bc6c.

📒 Files selected for processing (1)
  • packages/system/dashboard/values.yaml (1 hunks)
🔇 Additional comments (2)
packages/system/dashboard/values.yaml (2)

2-3: LGTM: Proper configuration structure

The ingress configuration is correctly placed and follows standard Kubernetes annotation patterns.


7-8: Improved buffer configuration

The buffer settings have been optimized following the previous review feedback:

  • Buffer size reduced to 16k (from 100m)
  • 4 buffers per connection is a reasonable default

@@ -1,4 +1,11 @@
kubeapps:
ingress:
annotations:
nginx.ingress.kubernetes.io/proxy-read-timeout: "600"
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💡 Codebase verification

Timeout configuration needs alignment across services

The codebase shows inconsistent timeout configurations that could lead to reliability issues:

  • Default ingress-nginx has 10s timeout
  • Dashboard and Kubeapps both use 600s (10 min)
  • Bucket service uses 99999s (~27.7 hours)

Consider:

  1. Standardizing timeout values across services based on actual requirements
  2. Reducing the dashboard timeout from 600s to align closer with ingress-nginx defaults
  3. Particularly review the bucket service's excessive timeout of 99999s
🔗 Analysis chain

Consider a more conservative timeout value

While increasing the timeout can help prevent 502 errors, 600 seconds (10 minutes) is quite long and might mask underlying performance issues. Consider:

  1. Starting with a lower value (e.g., 120-180 seconds)
  2. Implementing proper monitoring to identify the root cause of long-running requests
  3. Gradually adjusting based on actual needs
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Check for any existing timeout-related configurations in other ingress resources
rg -A 2 "proxy-read-timeout" --type yaml

Length of output: 1319

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LGTM

@dosubot dosubot bot added the lgtm This PR has been approved by a maintainer label Dec 14, 2024
@kvaps kvaps merged commit b43c958 into aenix-io:main Dec 14, 2024
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3 participants