K8S

/k8s-check

Description

Safely check Kubernetes resources without applying changes.

Workflow

1. Use kubectl get and kubectl describe to inspect resources
2. Show current state of relevant resources
3. Identify potential issues or conflicts
4. Provide read-only analysis and recommendations
5. Never execute destructive operations

Safe Commands Used

• kubectl get <resource>
• kubectl describe <resource>
• kubectl logs <pod>
• kubectl explain <resource>

Examples

# Check all pods
/k8s-check pods

# Check specific namespace
/k8s-check pods -n production

# Check deployments
/k8s-check deployments

# Check services
/k8s-check services

# Check resource usage
/k8s-check top pods

Resource Types

• Pods
• Deployments
• Services
• ConfigMaps
• Secrets
• Ingress
• PersistentVolumes
• Nodes

Safety Features

• Read-only operations only
• No destructive commands
• Clear resource identification
• Conflict detection
• Resource dependency analysis

Output Format

Resource: pods
Namespace: default
Status: Running (3/3)

POD_NAME                    READY   STATUS    RESTARTS   AGE
app-pod-12345              1/1     Running   0          2h
db-pod-67890               1/1     Running   0          2h
cache-pod-11111            1/1     Running   0          2h

Issues Found:
- No issues detected

Recommendations:
- All pods are healthy
- Consider resource limits optimization

Integration

• Works with kubectl context
• Integrates with monitoring tools
• Supports multiple namespaces
• Compatible with CI/CD pipelines

/k8s-validate

Description

Validate Kubernetes manifests without applying them.

Workflow

1. Use kubectl apply --dry-run=client to validate syntax
2. Use kubectl apply --dry-run=server to validate against cluster
3. Check for resource conflicts and dependencies
4. Validate YAML/JSON syntax and structure
5. Provide detailed validation report with recommendations

Validation Steps

• Syntax validation
• Schema validation
• Resource conflict detection
• Security policy compliance
• Best practices check

Examples

# Validate single manifest
/k8s-validate deployment.yaml

# Validate multiple manifests
/k8s-validate *.yaml

# Validate with server-side validation
/k8s-validate --server deployment.yaml

# Validate specific namespace
/k8s-validate -n production deployment.yaml

Validation Types

• Client-side: Local syntax and schema validation
• Server-side: Cluster-specific validation
• Security: Security policy compliance
• Best Practices: Kubernetes best practices

Output Format

Validation Report: deployment.yaml
Status: ✅ VALID

Client-side validation: ✅ PASSED
- YAML syntax: ✅ Valid
- Schema validation: ✅ Valid
- Resource references: ✅ Valid

Server-side validation: ✅ PASSED
- Cluster compatibility: ✅ Compatible
- Resource quotas: ✅ Within limits
- Security policies: ✅ Compliant

Best Practices: ⚠️ WARNINGS
- Missing resource limits: Consider adding CPU/memory limits
- Missing readiness probe: Consider adding readiness probe

Recommendations:
- Add resource limits for better resource management
- Implement health checks for better monitoring

Safety Features

• No changes applied to cluster
• Comprehensive validation coverage
• Clear error reporting
• Best practices recommendations

Integration

• Works with kubectl context
• Integrates with CI/CD pipelines
• Supports multiple manifest formats
• Compatible with GitOps workflows

/k8s-diff

Description

Show differences between local manifests and cluster state.

Workflow

1. Use kubectl diff to show changes that would be applied
2. Highlight critical changes (deletions, resource limits, security contexts)
3. Provide impact analysis of proposed changes
4. Show before/after comparison
5. Recommend safe application strategies

Safety Features

• Never automatically apply changes
• Clearly highlight destructive operations
• Show resource dependencies
• Provide rollback strategies

Examples

# Show diff for single manifest
/k8s-diff deployment.yaml

# Show diff for multiple manifests
/k8s-diff *.yaml

# Show diff with specific namespace
/k8s-diff -n production deployment.yaml

# Show diff with context
/k8s-diff --context=5 deployment.yaml

Output Format

Diff Report: deployment.yaml
Resource: deployment/app-deployment
Namespace: default

Changes Detected:
- Image updated: app:v1.0.0 → app:v1.1.0
- Replicas changed: 3 → 5
- Resource limits added: CPU: 500m, Memory: 512Mi

Critical Changes:
⚠️  Replica count increase (3 → 5)
⚠️  Resource limits added (may affect scheduling)

Impact Analysis:
- Rolling update will be triggered
- 2 additional pods will be created
- Resource usage will increase
- No data loss expected

Recommendations:
- Monitor resource usage after deployment
- Consider gradual rollout
- Verify application health after update

Change Categories

• Safe: Non-destructive changes
• Warning: Potentially impactful changes
• Critical: Destructive or high-impact changes

Rollback Strategies

• Previous version restoration
• Resource scaling adjustments
• Configuration rollback
• Emergency procedures

Integration

• Works with kubectl context
• Integrates with GitOps workflows
• Supports multiple manifest formats
• Compatible with CI/CD pipelines

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