Kubernetes Skills

# Certificate Management with cert-manager

Manage TLS certificates using kubectl-mcp-server's cert-manager tools.

Check Installation

```python certmanager_detect_tool() ```

Certificates

List Certificates

```python # List all certificates certmanager_certificates_list_tool(namespace="default")

# Check certificate status # - True: Certificate ready # - False: Certificate not ready (check events) ```

Get Certificate Details

```python certmanager_certificate_get_tool( name="my-tls", namespace="default" ) # Shows: # - Issuer reference # - Secret name # - DNS names # - Expiry date # - Renewal time ```

Create Certificate

```python kubectl_apply(manifest=""" apiVersion: cert-manager.io/v1 kind: Certificate metadata: name: my-tls namespace: default spec: secretName: my-tls-secret issuerRef: name: letsencrypt-prod kind: ClusterIssuer dnsNames: - app.example.com - www.example.com """) ```

Issuers

List Issuers

```python # Namespace issuers certmanager_issuers_list_tool(namespace="default")

# Cluster-wide issuers certmanager_clusterissuers_list_tool() ```

Get Issuer Details

```python certmanager_issuer_get_tool(name="my-issuer", namespace="default") certmanager_clusterissuer_get_tool(name="letsencrypt-prod") ```

Create Let's Encrypt Issuer

```python # Staging (for testing) kubectl_apply(manifest=""" apiVersion: cert-manager.io/v1 kind: ClusterIssuer metadata: name: letsencrypt-staging spec: acme: server: https://acme-staging-v02.api.letsencrypt.org/directory email: [email protected] privateKeySecretRef: name: letsencrypt-staging-key solvers: - http01: ingress: class: nginx """)

# Production kubectl_apply(manifest=""" apiVersion: cert-manager.io/v1 kind: ClusterIssuer metadata: name: letsencrypt-prod spec: acme: server: https://acme-v02.api.letsencrypt.org/directory email: [email protected] privateKeySecretRef: name: letsencrypt-prod-key solvers: - http01: ingress: class: nginx """) ```

Create Self-Signed Issuer

```python kubectl_apply(manifest=""" apiVersion: cert-manager.io/v1 kind: ClusterIssuer metadata: name: selfsigned spec: selfSigned: {} """) ```

Certificate Requests

```python # List certificate requests certmanager_certificaterequests_list_tool(namespace="default")

# Get request details (for debugging) certmanager_certificaterequest_get_tool( name="my-tls-xxxxx", namespace="default" ) ```

Troubleshooting

Certificate Not Ready

1. ```python
2. certmanager_certificate_get_tool(name, namespace) # Check status
3. certmanager_certificaterequests_list_tool(namespace) # Check request
4. get_events(namespace) # Check events
5. # Common issues:
6. # - Issuer not ready
7. # - DNS challenge failed
8. # - Rate limited by Let's Encrypt
9. ```

Issuer Not Ready

1. ```python
2. certmanager_clusterissuer_get_tool(name) # Check status
3. get_events(namespace="cert-manager") # Check events
4. # Common issues:
5. # - Invalid credentials
6. # - Network issues
7. # - Invalid configuration
8. ```

Ingress Integration

```python # Automatic certificate via ingress annotation kubectl_apply(manifest=""" apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: my-ingress annotations: cert-manager.io/cluster-issuer: letsencrypt-prod spec: tls: - hosts: - app.example.com secretName: app-tls rules: - host: app.example.com http: paths: - path: / pathType: Prefix backend: service: name: my-service port: number: 80 """) ```

Related Skills

• k8s-networking - Ingress configuration
• k8s-security - Security best practices