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#!/usr/bin/env python3
import sys
import psycopg2
from datetime import timedelta
# Up to 5 minutes delay is ok
WARNING_THRESHOLD = timedelta(minutes=5)
# More than 15 minutes something is definitely wrong
CRITICAL_THRESHOLD = timedelta(minutes=15)
if __name__ == "__main__":
if len(sys.argv) != 2:
print("Usage: nagios_check.py <dsn>")
sys.exit(1)
conn = psycopg2.connect(sys.argv[1])
curs = conn.cursor()
# Get the oldest entry that has not been completed, if any
curs.execute("SELECT COALESCE(max(now()-added), '0') FROM varnishqueue.queue WHERE completed IS NULL")
rows = curs.fetchall()
conn.close()
if len(rows) == 0:
print("OK, queue is empty")
sys.exit(0)
age = rows[0][0]
if age < WARNING_THRESHOLD:
print("OK, queue age is %s" % age)
sys.exit(0)
elif age < CRITICAL_THRESHOLD:
print("WARNING, queue age is %s" % age)
sys.exit(1)
else:
print("CRITICAL, queue age is %s" % age)
sys.exit(2)
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