majiayu000 Kubernetes Health Diagnostics
Dynamic, discovery-driven health checks for any Kubernetes cluster configuration
BEFORE YOU START
| Impact | Value |
|---|---|
| Token Savings | ~70% vs manual kubectl exploration |
| Setup Time | 0 min (uses existing kubectl config) |
| Coverage | Adapts to installed operators automatically |
Known Issues Prevented
| Problem | Root Cause | How This Skill Helps |
|---|---|---|
| Missing operator health | Static checklists miss CRDs | Dynamic API discovery detects all installed operators |
| Stale diagnostics | Manual checks become outdated | Real-time cluster API interrogation |
| Incomplete coverage | Unknown cluster configuration | Automatically activates relevant sub-agents |
Quick Start
- Verify cluster access: Ensure
kubectlis configured and can reach your cluster - Run discovery: Execute
discover_apis.pyto detect installed operators - Dispatch agents: Use the orchestrator to run health checks based on discovery
# Step 1: Verify kubectl context
kubectl config current-context
kubectl cluster-info
# Step 2: Run API discovery
uv run .claude/skills/kubernetes-health/scripts/discover_apis.py
# Step 3: Review detected operators and dispatch health agents
Critical Rules
Always
- Verify kubectl context before running health checks
- Use read-only kubectl commands (get, describe, logs)
- Run core health checks before operator-specific checks
- Aggregate results using the provided scoring methodology
Never
- Modify cluster resources during health checks
- Expose secret values in health reports (metadata only)
- Skip context verification for production clusters
- Assume operator presence without API discovery
Common Mistakes
| Mistake | Why It's Wrong | Correct Approach |
|---|---|---|
| Hardcoding operator checks | Misses installed operators, checks missing ones | Use API discovery to detect what's installed |
| Sequential agent dispatch | Slow for multi-operator clusters | Run operator agents in parallel (same priority) |
| Raw kubectl output | Token inefficient, hard to parse | Use scripts for condensed JSON output |
Bundled Resources
Scripts
| Script | Purpose |
|---|---|
scripts/discover_apis.py |
Discovers all API groups and detects installed operators |
scripts/health_orchestrator.py |
Maps discovered APIs to specialized health agents |
scripts/aggregate_report.py |
Aggregates multi-agent results into unified report |
References
| File | Contents |
|---|---|
references/operator-checks.md |
Detailed health checks for each supported operator |
references/health-scoring.md |
Scoring methodology and weight assignments |
Templates
| File | Purpose |
|---|---|
templates/health-report.json |
JSON schema for health report output |
Dependencies
Required
| Package | Version | Purpose |
|---|---|---|
| kubectl | Latest | Cluster interaction |
| Python | >= 3.11 | Script execution |
| uv | Latest | Python script runner |
Optional
| Package | Version | Purpose |
|---|---|---|
| kubernetes | >= 28.1.0 | Python client (for advanced discovery) |
Supported Operators
The skill automatically detects and dispatches specialized agents for:
| Operator | API Group | Agent |
|---|---|---|
| Core K8s | (always) | k8s-core-health-agent |
| Crossplane | crossplane.io | k8s-crossplane-health-agent |
| ArgoCD | argoproj.io | k8s-argocd-health-agent |
| Cert-Manager | cert-manager.io | k8s-certmanager-health-agent |
| Prometheus | monitoring.coreos.com | k8s-prometheus-health-agent |
Health Scoring
| Status | Score Range | Criteria |
|---|---|---|
| HEALTHY | 90-100 | All checks pass, no warnings |
| DEGRADED | 60-89 | Some warnings, no critical issues |
| CRITICAL | 0-59 | Critical issues affecting availability |
Troubleshooting
kubectl connection issues
# Verify context
kubectl config current-context
# Test connectivity
kubectl cluster-info
# Check permissions
kubectl auth can-i get pods --all-namespaces
Discovery returns empty results
- Ensure cluster is reachable
- Check RBAC permissions for API discovery
- Verify kubectl version compatibility
Agent dispatch failures
- Confirm discovered API group matches agent trigger
- Check agent file exists in
.claude/agents/specialized/kubernetes/ - Review agent tool restrictions
Setup Checklist
- kubectl configured and connected to cluster
- Python 3.11+ installed
- uv installed for script execution
- Read permissions on cluster resources
- Agent files present in
.claude/agents/specialized/kubernetes/