Google Compute Engine backend service health check to Datadog

backend_service_health.py

from datadog import statsd
import googleapiclient.discovery

PROJECT = 'myproj-153506'
SERVICES = [
  'internal',
  'www',
  'backend'
]
METRIC = 'gcp.gce.backend.health'

compute = googleapiclient.discovery.build('compute', 'v1')

for service in SERVICES:
    backend_service = compute.backendServices().get(backendService=service,project=PROJECT).execute()
    for backend in backend_service.get('backends'):
        group = backend.get('group')
        health = compute.backendServices().getHealth(backendService=service,project=PROJECT,body={'group':group}).execute()
        for instance in health.get('healthStatus'):
            tags = [
                "instance:%s" % instance.get('instance'),
                "ip:%s" % instance.get('ipAddress'),
                "port:%s" % instance.get('port'),
                "state:%s" % instance.get('healthState'),
                "group:%s" % group,
                "service:%s" % service
            ]
            if instance.get('healthState') == 'HEALTHY':
                statsd.service_check(METRIC, statsd.OK, tags=tags)
            else:
                statsd.service_check(METRIC, stats.CRITICAL, tags=tags)