k8s-certs
Kubernetes certificate management with cert-manager. Use when managing TLS certificates, configuring issuers, or troubleshooting certificate issues.
What this skill does
# 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
```python
1. certmanager_certificate_get_tool(name, namespace) # Check status
2. certmanager_certificaterequests_list_tool(namespace) # Check request
3. get_events(namespace) # Check events
4. # Common issues:
# - Issuer not ready
# - DNS challenge failed
# - Rate limited by Let's Encrypt
```
### Issuer Not Ready
```python
1. certmanager_clusterissuer_get_tool(name) # Check status
2. get_events(namespace="cert-manager") # Check events
3. # Common issues:
# - Invalid credentials
# - Network issues
# - Invalid configuration
```
## 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](../k8s-networking/SKILL.md) - Ingress configuration
- [k8s-security](../k8s-security/SKILL.md) - Security best practices
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