/ServiceManager

Primary LanguagePython

ServiceManager credit exam

Directory services contains several configuration files describing various services that must be highly available (always running). The configuration service has the following format:

SERVICE_NAME=name
PROGRAM=path_to_the_program
RUN_ARGS=program arguments to pass
HEALTH_ENDPOINT={path}
PORT={port}
ENABLED=true

Your program must start all the services and continuously monitor them using the health endpoints. If 3 continuous responses from health endpoints do not return 2xx, then you must restart the service.

Response status can be retrieved by:

HttpURLConnection http = (HttpURLConnection) url.openConnection();
int statusCode = http.getResponseCode();

The health endpoints probing happens every 15 seconds. Your program also accepts the following commands from STDIN:

  • show-status – shows status of all services
    • HEALTHY - last 3 probes were successful
    • TENTATIVE - at least 1 error in the last 3 probes
    • DOWN - all 3 probes failed or the startup was not successful
    • DISABLED - service is disabled
  • disable ${name} - stop the service and do not attempt to start it again
  • enable ${name} - enables the disabled service

server.py

Copy the server.py file to /tmp folder. You can test it yourself from command line by running curl ${URL}.