Datadog

Configure, troubleshoot, or investigate incidents in Datadog.

Mode: setup

Deploy and configure the Datadog Agent on Kubernetes.

Steps:

1. Ask for: Kubernetes distribution (EKS/AKS/GKE), Datadog site (EU: datadoghq.eu / US: datadoghq.com), features needed (APM, logs, process monitoring)
2. Generate Helm values with: API key from Secret (never hardcoded), APM enabled, log collection enabled, cluster name set, Cluster Agent enabled with 2 replicas
3. Provide install command: helm upgrade --install datadog datadog/datadog -f values.yaml -n datadog
4. Provide verification commands: kubectl exec -n datadog ds/datadog -- agent status
5. Add Unified Service Tagging labels (DD_ENV, DD_SERVICE, DD_VERSION) to app Deployment

Mode: instrument

Add APM tracing to a service.

Steps:

1. Ask for: language (Node.js / Python / Java / Go), framework (Express / Django / Spring / etc.), whether log-trace correlation is needed
2. Generate tracer initialisation code — dd-trace init must be the first import in Node.js; use ddtrace-run or patch_all() in Python
3. Add Unified Service Tagging env vars to the Deployment manifest
4. Add custom spans for business-critical paths (payment processing, order creation, etc.)
5. Show expected APM UI outcome: service map entry, latency/error rate populated

Mode: monitor

Create a Datadog monitor for a service.

Steps:

1. Ask for: metric to alert on (error rate / latency / availability), thresholds, notification targets (PagerDuty / Slack)
2. Generate Terraform datadog_monitor resource (preferred over UI / API for IaC)
3. Set notify_no_data: true and no_data_timeframe so silent services alert
4. Include warning and critical thresholds
5. Tag with service:, env:, team: for routing

Output monitor query, thresholds, notification message with @pagerduty-* and @slack-* handles.

Mode: dashboard

Create a Datadog dashboard for a service.

Steps:

1. Default to RED method: request rate, error rate %, p50/p95/p99 latency
2. Generate Terraform datadog_dashboard resource with timeseries_definition widgets
3. Use APM metrics: trace.web.request.hits, trace.web.request.errors, trace.web.request percentiles
4. Add template variables for env and service for reuse across environments

Mode: slo

Define a Datadog SLO.

Steps:

1. Ask for: SLI metric (availability / latency), target (e.g. 99.9%), timeframe (7d / 30d / 90d)
2. Generate Terraform datadog_service_level_objective resource
3. Set both target and warning thresholds
4. Link SLO to relevant monitors for error budget burn alerts

Mode: investigate

Live incident investigation using the Datadog MCP server.

Requires the Datadog MCP server connected to Claude Code. See setup in references/datadog.md → MCP Server Setup.

Phase 1 — Triage (what is broken right now?)

Ask Claude to run these via the MCP server:

• List all active monitors in ALERT or WARN state for the affected service and environment
• Fetch the triggering monitor's event stream for the last 30 minutes
• Check recent deployments — list events tagged service:<name> over the last 2 hours

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What monitors are currently firing for service:orders-service env:production?
Show me the event stream for the orders-service in the last 30 minutes.
Were there any deployments to orders-service in the last 2 hours?

Phase 2 — Signals (logs, metrics, traces)

Correlate the three pillars through the MCP:

• Pull error logs for the affected service filtered to the incident window
• Query APM error rate and p99 latency time series
• Fetch a sample of failing traces to identify the error message and stack trace

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Show me error logs for service:orders-service between <start> and <end>.
What is the error rate and p99 latency for orders-service over the last hour?
Find traces with errors for orders-service — show me the top error messages.

Phase 3 — Root cause

Narrow down with MCP queries:

• Compare metrics before and after the incident start time
• Check downstream dependencies — are errors concentrated on one endpoint or database host?
• Query infrastructure metrics (CPU, memory, disk) for the affected hosts

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Compare the error rate for orders-service before and after <incident-start-time>.
Which endpoints have the highest error rate on orders-service right now?
Show me CPU and memory metrics for the hosts running orders-service.

Phase 4 — Resolution and follow-up

• Acknowledge or resolve the triggering monitor via MCP
• Post an incident update to Slack via the MCP integration
• Create a notebook capturing the timeline, evidence, and resolution for the post-mortem

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Resolve the monitor "orders-service high error rate" — the fix has been deployed.
Post to #incidents: "orders-service error rate returning to baseline, fix deployed at <time>."
Create a Datadog notebook summarising the orders-service incident timeline.

Mode: debug

If you need deeper context on any Datadog component, load references/datadog.md.

Diagnose Datadog data gaps or agent issues without the MCP server.

Classify the failure:

• Agent — no data flowing, agent status unhealthy
• APM — traces missing, service not appearing in service map
• Logs — logs not ingested, missing trace correlation
• Monitor — "No Data" state, incorrect thresholds
• Metrics — custom metric not visible in Metrics Explorer

Evidence to collect:

bashCopy code
# Agent health
kubectl exec -n datadog ds/datadog -- agent status

# Check APM port
kubectl exec -n datadog ds/datadog -- agent check apm

# Verify pod env vars
kubectl describe pod <app-pod> | grep -E "DD_ENV|DD_SERVICE|DD_VERSION|DD_TRACE"

# Test metric query in Metrics Explorer before using in monitor

Provide: symptom → root cause hypothesis → evidence command → fix → validation

Mode: pup

Perform Datadog operations via the pup CLI — log search, metric queries, monitor management, and post-deploy gates.

Requires pup installed and DD_API_KEY, DD_APP_KEY, DD_SITE set in shell. See references/datadog.md → pup CLI for install and config.

Steps:

1. Classify the request:
   • search — search logs for a service/time range
   • query — fetch a metric time series
   • monitors — list, mute, unmute, or resolve a monitor
   • gate — generate a post-deploy quality gate script
2. Generate the exact pup command with flags
3. For scripting/gate use cases, generate a bash script using the scripting pattern from references/datadog.md → pup CLI
4. Include jq expression to extract the value of interest from --format json output

Mode: llmo

Instrument an AI application with Datadog LLM Observability, bootstrap evaluators, analyze experiments, or root-cause LLM failures.

Steps:

1. Classify the request:
   • instrument — add LLMObs spans to a Python or Node.js LLM application
   • evaluate — attach evaluation scores to spans and set up a CI quality gate
   • rca — root-cause a failing LLM trace using dd-llmo-eval-trace-rca
   • experiment — compare model/prompt variants using dd-llmo-experiment-analyzer
2. For instrument: ask for language (Python/Node.js) and LLM provider (OpenAI/Anthropic/Bedrock); generate LLMObs.enable() init and @llm / llmobs.trace() call for the main LLM call; add DD_LLMOBS_ML_APP and DD_LLMOBS_AGENTLESS_ENABLED to the Deployment env vars
3. For evaluate: generate LLMObs.submit_evaluation() calls (kwarg span=LLMObs.export_span()) after each LLM span; generate a pup-based CI gate querying ml_obs.evaluations.<label> metric
4. For rca: instruct user to invoke /dd-llmo-eval-trace-rca with the failing trace ID; provide the manual pup apm traces get fallback
5. For experiment: generate experiment.name, experiment.variant, experiment.cohort tag annotations; instruct user to invoke /dd-llmo-experiment-analyzer; provide manual pup comparison fallback
6. Always set DD_LLMOBS_ML_APP — spans without this tag are silently discarded

Reference: references/llm-observability.md