icinga2-checks/check_nginx.py

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#!/usr/bin/env python
import argparse
import sys
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import traceback
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from checker import nagios, print_icinga2_check_status
from checker.http import fetch_with_retry
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from checker.linuxfabric.base import get_state
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def parse_nginx_status(status):
try:
lines = status.strip().split("\n")
data = {}
for line in lines:
parts = line.split()
if "Active" in line:
data["active_connections"] = int(parts[2])
elif "server accepts handled requests" in line:
continue
elif len(parts) == 3 and parts[1].isdigit():
data["accepted"] = int(parts[0])
data["handled"] = int(parts[1])
data["requests"] = int(parts[2])
elif "Reading" in line:
data["reading"] = int(parts[1])
data["writing"] = int(parts[3])
data["waiting"] = int(parts[5])
return data
except Exception as e:
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print_icinga2_check_status(f'failed to parse status page: {e}', nagios.UNKNOWN)
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sys.exit(nagios.UNKNOWN)
def main():
parser = argparse.ArgumentParser(description="Check Nginx status using stub_status.")
parser.add_argument("--url", required=True, help="URL to Nginx stub_status.")
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parser.add_argument("--critical-active", type=int, default=None, help="Critical threshold for active connections. Default: 0 (disabled)")
parser.add_argument("--warning-active", type=int, default=None, help="Warning threshold for active connections. Default: 0 (disabled)")
parser.add_argument("--critical-waiting", type=int, default=None, help="Critical threshold for waiting connections. Default: 0 (disabled)")
parser.add_argument("--warning-waiting", type=int, default=None, help="Warning threshold for waiting connections. Default: 0 (disabled)")
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args = parser.parse_args()
status = fetch_with_retry(args.url).text
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data = parse_nginx_status(status)
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perfdata_dict = {
"active_connections": {
"value": data["active_connections"],
"warn": args.warning_active,
"crit": args.critical_active,
},
"waiting": {
"value": data["waiting"],
"warn": args.warning_waiting,
"crit": args.critical_waiting,
},
"accepted": {"value": data["accepted"]},
"handled": {"value": data["handled"]},
"requests": {"value": data["requests"]},
"reading": {"value": data["reading"]},
"writing": {"value": data["writing"]},
}
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return_code = nagios.STATE_OK
if args.warning_active or args.critical_active:
active_connections_state = get_state(
data["active_connections"], args.warning_active, args.critical_active, "ge"
)
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else:
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active_connections_state = nagios.STATE_OK
return_code = max(active_connections_state, return_code)
if args.warning_waiting or args.critical_waiting:
waiting_state = get_state(data["waiting"], args.warning_waiting, args.critical_waiting, "ge")
else:
waiting_state = nagios.STATE_OK
return_code = max(waiting_state, return_code)
# if active_connections_state == nagios.STATE_CRIT or waiting_state == nagios.STATE_CRIT:
# return_code = nagios.CRITICAL
# elif active_connections_state == nagios.STATE_WARN or waiting_state == nagios.STATE_WARN:
# return_code = nagios.WARNING
# else:
# return_code = nagios.OK
status_str = "Active connections: {active_connections}, Waiting: {waiting}, Accepted: {accepted}, Handled: {handled}, Requests: {requests}, Reading: {reading}, Writing: {writing}".format(**data)
print_icinga2_check_status(status_str, return_code, perfdata_dict)
sys.exit(return_code)
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if __name__ == "__main__":
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try:
main()
except Exception as e:
print_icinga2_check_status(f'exception "{e}" \n {traceback.format_exc()}', nagios.UNKNOWN)
sys.exit(nagios.UNKNOWN)