Python server plugin for monitoring a Spring Boot microservice health check

boot_monitor.py

import os, sys, requests, json, argparse

if __name__=='__main__':

    fileName = os.path.basename(__file__)
    parser = argparse.ArgumentParser(description='Monitor a spring boot healthcheck.',
        epilog='Examples: "' + fileName + ' -i localhost:8080 -s myService" OR "'+fileName+' -i myhost.example.com:8001"')
    parser.add_argument('-i', '--host', help="The hostname or hostname:port portion of the service)", required=True)
    parser.add_argument('-t', '--https', help="Turn on SSL (use HTTPS instead of HTTP)", action='store_true', default=False)
    parser.add_argument('-s', '--service', help="The case-sensitive name of the service for including the service-specific section inside the health check response", required=False)

    args = vars(parser.parse_args())

    transport = 'http';
    if (args['https']):
      transport = 'https';

    if (args['service']):
        serviceName = args['service']

## Call the spring-boot health check on /health
## remember that the actuator managemept APIs can be optionally exposed on a different port
## the host parameter can contain an optional port (e.g. myhost:8080)

    hcReq = requests.get(transport+'://'+args['host']+'/health')
    if hcReq.status_code != 200:
        ## If a non-OK response, print CRITICAL with the response code and optional service-specific section from response JSON if cound
        resp = json.loads(hcReq.content)
        returnString = "CRITICAL :: HTTP " + str(hcReq.status_code)
        if (args['service']) and (resp[args['service']] is not 'null'):
            returnString += " :: Service " + args['service'] + " returned : " + json.dumps(resp[args['service']])
        print(str(returnString))
        sys.exit(2)
    else:
        resp = json.loads(hcReq.content)
        print("OK")
        sys.exit(0)