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docs: add Alloy guide for centralized Grafana Cloud telemetry push - #326
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📝 WalkthroughWalkthroughA documentation update to the validator setup guide that adds comprehensive instructions for configuring centralized metrics and logs collection to GenLayer Grafana Cloud using the Alloy service, including prerequisites, Docker Compose configuration, and troubleshooting guidance. Changes
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes Poem
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Actionable comments posted: 3
🤖 Fix all issues with AI agents
In `@pages/validators/setup-guide.mdx`:
- Line 837: The step header "2. **Add or verify the Alloy service in
docker-compose.yaml (copy if missing):" is awkwardly phrased; update it to a
clearer imperative such as "2. Verify the Alloy service in docker-compose.yaml —
add it if missing" or "2. Add the Alloy service to docker-compose.yaml if it’s
missing" by replacing the existing header text in
pages/validators/setup-guide.mdx (the line containing the current step string).
- Around line 830-835: Update the NODE_METRICS_ENDPOINT example to use the
genlayer-node service name instead of localhost (set
NODE_METRICS_ENDPOINT=genlayer-node:9153) and add a short note near the example
explaining that Docker containers must use service names (e.g., genlayer-node)
rather than localhost so the Alloy container can reach the genlayer-node metrics
endpoint; update any surrounding docs that reference NODE_METRICS_ENDPOINT to
reflect this Docker networking guidance.
- Around line 1009-1023: Convert the "Troubleshooting" block into a properly
formatted Markdown subsection: change the plain "Troubleshooting" text to a
heading (e.g., "#### Troubleshooting"), wrap the curl invocation in a fenced
bash code block, and turn the following lines into bullet points with clear
emphasis and inline code where appropriate (e.g., **Authentication errors
(401/403):** Double-check `MONITORING_USERNAME` and `MONITORING_PASSWORD` in
`.env`, **No data pushed:** Ensure URLs in `.env` have no trailing slash, **Need
help?:** instruct users to run the docker logs command). Ensure the section ends
with a fenced bash code block containing `docker logs genlayer-node-alloy` so
the example is complete and consistent.
🧹 Nitpick comments (4)
pages/validators/setup-guide.mdx (4)
839-875: Consider addingdepends_onand network configuration for reliable container communication.The Alloy service needs to scrape metrics from the
genlayer-nodecontainer. Without explicit network configuration ordepends_on, the service may start before genlayer-node is ready, and network resolution might fail.♻️ Suggested improvement
alloy: image: grafana/alloy:latest container_name: genlayer-node-alloy command: - run - /etc/alloy/config.river - --server.http.listen-addr=0.0.0.0:12345 - --storage.path=/var/lib/alloy/data volumes: - ./alloy-config.river:/etc/alloy/config.river:ro - ${NODE_LOGS_PATH:-./data/node/logs}:/var/log/genlayer:ro - alloy_data:/var/lib/alloy environment: - CENTRAL_LOKI_URL=${CENTRAL_LOKI_URL} # ... other env vars ... ports: - "12345:12345" # Alloy UI for debugging restart: unless-stopped + depends_on:+ - genlayer-node profiles: - monitoring
939-944: Complex single-line expression reduces readability.The
json_decode(coalesce(env(...), format(...)))expression on line 940 is difficult to read and understand. While functional, it may confuse users trying to customize the configuration.Consider adding a comment explaining what this line does, or breaking it into multiple lines for clarity:
// Scrape targets: uses SCRAPE_TARGETS_JSON if set, otherwise builds from individual env vars prometheus.scrape "genlayer_node" { targets = json_decode(coalesce( env("SCRAPE_TARGETS_JSON"), format("[{\"__address__\":\"%s\",\"instance\":\"%s\",\"validator_name\":\"%s\"}]", coalesce(env("NODE_METRICS_ENDPOINT"), "localhost:9153"), coalesce(env("NODE_ID"), "local"), coalesce(env("VALIDATOR_NAME"), "default") ) )) // ... }
976-982: Self-monitoring metrics are collected but discarded.The Alloy self-monitoring scrape has
forward_to = [], meaning these metrics are collected but sent nowhere. If this is intentional (to avoid sending Alloy's own metrics to the central system), consider adding a comment explaining this design choice.prometheus.scrape "alloy" { targets = prometheus.exporter.self.alloy.targets - forward_to = []+ forward_to = [] // Intentionally empty: Alloy self-metrics are not forwarded to avoid noise scrape_interval = coalesce(env("ALLOY_SELF_MONITORING_INTERVAL"), "60s") }
820-826: Consider adding a security callout for credential handling.The
.envfile contains sensitive Grafana Cloud API credentials. A brief security note would help users understand the importance of protecting these credentials.Consider adding a Callout component:
<Callouttype="warning"emoji="🔐"> **Protect your credentials!** The `MONITORING_PASSWORD` is a Grafana Cloud API key with write access. Never commit your `.env` file to version control. Add `.env` to your `.gitignore` file. </Callout>
| # Usually defaults are fine | ||
| NODE_METRICS_ENDPOINT=localhost:9153 | ||
| LOG_FILE_PATTERN=/var/log/genlayer/node*.log | ||
| METRICS_SCRAPE_INTERVAL=15s | ||
| ``` |
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Docker networking issue: localhost:9153 won't work from the Alloy container.
When the Alloy container tries to scrape metrics from localhost:9153, it will attempt to reach port 9153 on itself (the Alloy container), not the genlayer-node container. For Docker networking, the endpoint should use the container service name.
Based on learnings from this repository, Docker containers must use service names instead of localhost to communicate.
🔧 Suggested fix
# Usually defaults are fine
-NODE_METRICS_ENDPOINT=localhost:9153+NODE_METRICS_ENDPOINT=genlayer-node:9153Also add a note explaining this:
# For Docker deployments, use the container service name instead of localhost
NODE_METRICS_ENDPOINT=genlayer-node:9153📝 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.
| # Usually defaults are fine | |
| NODE_METRICS_ENDPOINT=localhost:9153 | |
| LOG_FILE_PATTERN=/var/log/genlayer/node*.log | |
| METRICS_SCRAPE_INTERVAL=15s | |
| ``` | |
| # Usually defaults are fine | |
| NODE_METRICS_ENDPOINT=genlayer-node:9153 | |
| LOG_FILE_PATTERN=/var/log/genlayer/node*.log | |
| METRICS_SCRAPE_INTERVAL=15s |
🤖 Prompt for AI Agents
In `@pages/validators/setup-guide.mdx` around lines 830 - 835, Update the
NODE_METRICS_ENDPOINT example to use the genlayer-node service name instead of
localhost (set NODE_METRICS_ENDPOINT=genlayer-node:9153) and add a short note
near the example explaining that Docker containers must use service names (e.g.,
genlayer-node) rather than localhost so the Alloy container can reach the
genlayer-node metrics endpoint; update any surrounding docs that reference
NODE_METRICS_ENDPOINT to reflect this Docker networking guidance.
| METRICS_SCRAPE_INTERVAL=15s | ||
| ``` | ||
| 2. **Add or verify the Alloy service in docker-compose.yaml (copy if missing): |
There was a problem hiding this comment.
Minor grammatical issue in the step header.
The sentence structure is slightly off - it starts with "Add or verify" but doesn't flow naturally as a step instruction.
📝 Suggested fix
-2. **Add or verify the Alloy service in docker-compose.yaml (copy if missing):+2. **Add the Alloy service to your docker-compose.yaml** (or verify it exists if using the provided tarball):📝 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.
| 2.**Add or verify the Alloy service in docker-compose.yaml (copy if missing): | |
| 2.**Add the Alloy service to your docker-compose.yaml** (or verify it exists if using the provided tarball): |
🤖 Prompt for AI Agents
In `@pages/validators/setup-guide.mdx` at line 837, The step header "2. **Add or
verify the Alloy service in docker-compose.yaml (copy if missing):" is awkwardly
phrased; update it to a clearer imperative such as "2. Verify the Alloy service
in docker-compose.yaml — add it if missing" or "2. Add the Alloy service to
docker-compose.yaml if it’s missing" by replacing the existing header text in
pages/validators/setup-guide.mdx (the line containing the current step string).
| Troubleshooting | ||
| - No local metrics: | ||
| ```bash | ||
| curl http://localhost:9153/metrics | ||
| ``` | ||
| — it should return Prometheus-formatted data. | ||
| Authentication errors (401/403): Double-check MONITORING_USERNAME and MONITORING_PASSWORD in .env. | ||
| No data pushed: Ensure URLs in .env have no trailing slash. | ||
| Help: Share Alloy logs | ||
| ```bash | ||
| docker logs genlayer-node-alloy | ||
| ``` |
There was a problem hiding this comment.
Troubleshooting section has formatting issues.
The troubleshooting content lacks consistent Markdown formatting:
- "Troubleshooting" should be a proper heading (e.g.,
**Troubleshooting**or#### Troubleshooting) - Lines 1017-1019 appear to be separate bullet points but are missing proper list formatting
- The section ends abruptly
📝 Suggested formatting fix
-Troubleshooting-- No local metrics:+**Troubleshooting**++- **No local metrics:**
```bash
curl http://localhost:9153/metrics-— it should return Prometheus-formatted data.
-Authentication errors (401/403): Double-check MONITORING_USERNAME and MONITORING_PASSWORD in .env.
-No data pushed: Ensure URLs in .env have no trailing slash.
-Help: Share Alloy logs
- It should return Prometheus-formatted data.
+- Authentication errors (401/403): Double-check MONITORING_USERNAME and MONITORING_PASSWORD in .env.
+
+- No data pushed: Ensure URLs in .env have no trailing slash.
+
+- Need help? Share Alloy logs with the Foundation team:
docker logs genlayer-node-alloy
</details>
<details>
<summary>🤖 Prompt for AI Agents</summary>
In @pages/validators/setup-guide.mdx around lines 1009 - 1023, Convert the
"Troubleshooting" block into a properly formatted Markdown subsection: change
the plain "Troubleshooting" text to a heading (e.g., "#### Troubleshooting"),
wrap the curl invocation in a fenced bash code block, and turn the following
lines into bullet points with clear emphasis and inline code where appropriate
(e.g., Authentication errors (401/403): Double-check MONITORING_USERNAME
and MONITORING_PASSWORD in .env, No data pushed: Ensure URLs in .env
have no trailing slash, Need help?: instruct users to run the docker logs
command). Ensure the section ends with a fenced bash code block containingdocker logs genlayer-node-alloy so the example is complete and consistent.
</details>
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AgustinRamiroDiaz
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Thanks a ton for the contribution! It really helps us ship things faster
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