connectivity-test-cloud-init.yaml

#cloud-config

# Run a trivial http server which returns OK if it is able to connect to an
# external web server.
# N.B. This blocks, which means cloud-init will never complete. This is fine
#      for this CI test.
runcmd:
- - /usr/bin/python
  - -c
  - |
    from http.server import BaseHTTPRequestHandler
    from http.server import HTTPServer
    from urllib.request import urlopen

    TEST_URL='https://www.google.com/'

    class ConnectivityTest(BaseHTTPRequestHandler):
        def do_GET(self):
            try:
                urlopen(TEST_URL, timeout=5)
                self.send_response(200)
                self.end_headers()
                self.wfile.write('OK'.encode())
            except Exception as ex:
                self.send_response(500)
                self.end_headers()
                self.wfile.write(f'Unable to connect to {TEST_URL}: {ex}'.encode())

    HTTPServer(('0.0.0.0', 80), ConnectivityTest).serve_forever()