function-python/example/operation/operation.yaml at main · crossplane-contrib/function-python · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
apiVersion: ops.crossplane.io/v1alpha1
kind: Operation
metadata:
  name: check-cert-expiry
spec:
  mode: Pipeline
  pipeline:
  - step: check-certificate
    functionRef:
      name: function-python
    requirements:
      requiredResources:
      - requirementName: ingress
        apiVersion: networking.k8s.io/v1
        kind: Ingress
        name: example-ingress
        namespace: default
    input:
      apiVersion: python.fn.crossplane.io/v1beta1
      kind: Script
      script: |
        import ssl
        import socket
        from datetime import datetime

        from crossplane.function import request, response

        def operate(req, rsp):
            # Get the Ingress resource
            ingress = request.get_required_resource(req, "ingress")
            if not ingress:
                response.set_output(rsp, {"error": "No ingress resource found"})
                return

            # Extract hostname from Ingress rules
            hostname = ingress["spec"]["rules"][0]["host"]
            port = 443

            # Get SSL certificate info
            context = ssl.create_default_context()
            with socket.create_connection((hostname, port)) as sock:
                with context.wrap_socket(sock, server_hostname=hostname) as ssock:
                    cert = ssock.getpeercert()

            # Parse expiration date
            expiry_date = datetime.strptime(cert['notAfter'], '%b %d %H:%M:%S %Y %Z')
            days_until_expiry = (expiry_date - datetime.now()).days

            # Add warning if certificate expires soon
            if days_until_expiry < 30:
                response.warning(rsp, f"Certificate for {hostname} expires in {days_until_expiry} days")

            # Annotate the Ingress with certificate expiry info
            rsp.desired.resources["ingress"].resource.update({
                "apiVersion": "networking.k8s.io/v1",
                "kind": "Ingress",
                "metadata": {
                    "name": ingress["metadata"]["name"],
                    "namespace": ingress["metadata"]["namespace"],
                    "annotations": {
                        "cert-monitor.crossplane.io/expires": cert['notAfter'],
                        "cert-monitor.crossplane.io/days-until-expiry": str(days_until_expiry),
                        "cert-monitor.crossplane.io/status": "warning" if days_until_expiry < 30 else "ok"
                    }
                }
            })

            # Return results in operation output for monitoring
            response.set_output(rsp, {
                "hostname": hostname,
                "certificateExpires": cert['notAfter'],
                "daysUntilExpiry": days_until_expiry,
                "status": "warning" if days_until_expiry < 30 else "ok"
            })