add doc about How to Auto-Scale Applications via HPA Based on Custom … #116
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WalkthroughA new documentation guide explaining how to auto-scale Kubernetes apps with HPA using custom HTTP metrics via Prometheus and Prometheus Adapter; includes end-to-end setup, manifests, metric verification, and load-test validation. Changes
Estimated code review effort🎯 2 (Simple) | ⏱️ ~12 minutes Suggested reviewers
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Actionable comments posted: 2
🤖 Fix all issues with AI agents
In
`@docs/en/solutions/How_to_Auto_Scale_Apps_via_HPA_Based_on_Custom_HTTP_Metrics.md`:
- Around line 167-168: Replace the awkward sentence "Scp
`deploy/load-test-scaling.sh` to the master node of k8s cluster which the
metrics-app is running." with a tightened, correct version such as: "scp
deploy/load-test-scaling.sh to the master node of the Kubernetes cluster where
the metrics-app is running." Ensure lowercase "scp", use "Kubernetes cluster",
and change "which" to "where" for clarity.
- Around line 101-108: Add a brief clarifying note after the two kubectl apply
commands stating that both referenced manifests (deploy/resources.yaml and
deploy/servicemonitor.yaml) already set metadata.namespace: demo-ns, so you do
not need to pass -n demo-ns to kubectl; mention the exact field name
metadata.namespace: demo-ns to avoid confusion for readers about namespace
scope.
🧹 Nitpick comments (1)
docs/en/solutions/How_to_Auto_Scale_Apps_via_HPA_Based_on_Custom_HTTP_Metrics.md (1)
13-27: Fix markdown list indentation to satisfy linting.Markdownlint flags MD007 across these lists; the current indentation is inconsistent and will fail CI if linting is enforced.
♻️ Example fix (apply similarly to other lists)
- - Developing a demo application that exposes Prometheus metrics for HTTP request count. - - Containerizing the application and deploying it to Kubernetes. - - Configuring Prometheus to scrape metrics. - - Setting up Prometheus Adapter to expose custom metrics to Kubernetes. - - Creating Horizontal Pod Autoscaler (HPA) that uses custom HTTP metrics for scaling decisions. - - Validating the autoscaling behavior with load testing. +- Developing a demo application that exposes Prometheus metrics for HTTP request count. +- Containerizing the application and deploying it to Kubernetes. +- Configuring Prometheus to scrape metrics. +- Setting up Prometheus Adapter to expose custom metrics to Kubernetes. +- Creating Horizontal Pod Autoscaler (HPA) that uses custom HTTP metrics for scaling decisions. +- Validating the autoscaling behavior with load testing.Also applies to: 78-87, 95-100
| Deploy the application resources to Kubernetes: | ||
| ```bash | ||
| kubectl apply -f deploy/resources.yaml | ||
| ``` | ||
| Deploy the Prometheus ServiceMonitor Configuration: | ||
| ```bash | ||
| kubectl apply -f deploy/servicemonitor.yaml | ||
| ``` |
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🌐 Web query:
site:github.com/zhhray/http-metrics-exporter deploy resources.yaml namespace
💡 Result:
I found the repo — the deploy manifest uses the namespace demo-ns (the README shows kubectl examples referencing deploy/resources.yaml and metrics in namespace "demo-ns"). [1]
Source:
- zhhray/http-metrics-exporter (README / deploy instructions). [1]
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Add clarifying note: the provided manifests already include metadata.namespace: demo-ns.
The referenced GitHub manifests (deploy/resources.yaml and deploy/servicemonitor.yaml) already specify metadata.namespace: demo-ns, so the kubectl apply commands will correctly target the demo-ns namespace without requiring the -n demo-ns flag. Adding a brief note here would clarify this for readers and prevent confusion about namespace scope.
Suggested addition
Deploy the application resources to Kubernetes:
+ (Note: The manifests already specify `metadata.namespace: demo-ns`)
```bash
kubectl apply -f deploy/resources.yaml</details>
<!-- suggestion_start -->
<details>
<summary>📝 Committable suggestion</summary>
> ‼️ **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.
```suggestion
Deploy the application resources to Kubernetes:
(Note: The manifests already specify `metadata.namespace: demo-ns`)
🤖 Prompt for AI Agents
In
`@docs/en/solutions/How_to_Auto_Scale_Apps_via_HPA_Based_on_Custom_HTTP_Metrics.md`
around lines 101 - 108, Add a brief clarifying note after the two kubectl apply
commands stating that both referenced manifests (deploy/resources.yaml and
deploy/servicemonitor.yaml) already set metadata.namespace: demo-ns, so you do
not need to pass -n demo-ns to kubectl; mention the exact field name
metadata.namespace: demo-ns to avoid confusion for readers about namespace
scope.
| Scp `deploy/load-test-scaling.sh` to the master node of k8s cluster which the metrics-app is running. | ||
|
|
There was a problem hiding this comment.
Tighten the SCP sentence for clarity and spelling.
“Scp” and the clause “which the metrics-app is running” read awkwardly.
✍️ Suggested edit
-Scp `deploy/load-test-scaling.sh` to the master node of k8s cluster which the metrics-app is running.
+SCP `deploy/load-test-scaling.sh` to the master node of the k8s cluster where the metrics-app is running.📝 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.
| Scp `deploy/load-test-scaling.sh` to the master node of k8s cluster which the metrics-app is running. | |
| SCP `deploy/load-test-scaling.sh` to the master node of the k8s cluster where the metrics-app is running. |
🧰 Tools
🪛 LanguageTool
[grammar] ~167-~167: Ensure spelling is correct
Context: ...g.sh` to the master node of k8s cluster which the metrics-app is running. Execute th...
(QB_NEW_EN_ORTHOGRAPHY_ERROR_IDS_1)
🤖 Prompt for AI Agents
In
`@docs/en/solutions/How_to_Auto_Scale_Apps_via_HPA_Based_on_Custom_HTTP_Metrics.md`
around lines 167 - 168, Replace the awkward sentence "Scp
`deploy/load-test-scaling.sh` to the master node of k8s cluster which the
metrics-app is running." with a tightened, correct version such as: "scp
deploy/load-test-scaling.sh to the master node of the Kubernetes cluster where
the metrics-app is running." Ensure lowercase "scp", use "Kubernetes cluster",
and change "which" to "where" for clarity.
How to Auto-Scale Applications via HPA Based on Custom HTTP Metrics
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