Hello,
I´m facing an unexpected behavior in my own check_mk check for DNS Unbound
(cumulative statistic: yes) where seems to be the server-side check somehow
broken.
It can be inventoried, it shows metrics, but sometimes it has shown a
service stale status.
In command line is visible a message: unbound PEND - Cannot
compute check result: Value overflow
I´m not able to figure out what is wrong.
Could you please someone hint me for debug? The agent output is normal
integer counters which are continuously increased.
Server side:
#!/usr/bin/python
# -*- encoding: utf-8; py-indent-offset: 4 -*-
unbound_queries_default_levels = (1250,2000)
def inventory_unbound (info):
if len(info):
return [("unbound", "unbound_queries_default_levels")]
def check_unbound(item, params, info):
warn, crit = params
perfdata = []
status = 0
message = ""
now = time.time()
for line in info:
name = line[0]
value = int(line[1])
menofunkce = "f_%s" % (name)
rate = get_rate(menofunkce, now, value)
perfdata.append(( name, rate ))
if (name in "total_num_queries" and rate >= crit):
status = 2
message = "Crit - unexpected trafic total_num_queries %.2f /sec
(warn/crit above %s/%s )" % (rate, warn, crit)
elif (name in "total_num_queries" and rate >= warn):
status = 1
message = "Warn - increased trafic total_num_queries %.2f /sec
(warn/crit above %s/%s )" % (rate, warn, crit)
elif (name in "total_num_queries" and rate < warn):
message = "total_num_queries %.2f /sec (warn/crit above %s/%s )"
% (rate, warn, crit)
return(status, message, perfdata)
# declare the check to Check_MK
check_info['unbound'] = {
"check_function" : check_unbound,
"inventory_function" : inventory_unbound,
"service_description" : '%s',
"has_perfdata" : True,
}
Agent side:
#!/bin/sh
if command -v unbound-control > /dev/null 2>&1
then
echo '<<<unbound>>>'
unbound-control status > /dev/null 2>&1
status=$?
echo "status $status"
if [ "$status" -eq 0 ]
then
unbound-control stats | sed 's/=/ /' | tr '.' '_' | grep -v "histogram\|
\time\|\total_requestlist"
fi
fi
Check_mk command line output:
OMD[dev]:~$ check_mk --debug -vv --checks=unbound DNSRVU
[cpu_tracking] Start with phase 'busy'
Check_MK version 1.5.0p23
+ FETCHING DATA
[cpu_tracking] Push phase 'agent' (Stack: ['busy'])
[agent] No persisted sections loaded
[agent] Not using cache (Don't try it)
[agent] Execute data source
[agent] Connecting via TCP to 172.50.1.3:6556 (5.0s timeout)
[agent] Reading data from agent
[agent] Write data to cache file /omd/sites/devel/tmp/check_mk/cache/DNSRVU
[cpu_tracking] Pop phase 'agent' (Stack: ['busy', 'agent'])
[cpu_tracking] Push phase 'agent' (Stack: ['busy'])
[piggyback] No persisted sections loaded
[piggyback] Execute data source
[cpu_tracking] Pop phase 'agent' (Stack: ['busy', 'agent'])
unbound PEND - Cannot compute check result: Value overflow
[cpu_tracking] End
OK - [agent] Version: 1.4.0p31, OS: linux, execution time 0.7 sec |
execution_time=0.745 user_time=0.020 system_time=0.010 children_user_time=
0.000 children_system_time=0.000 cmk_time_agent=0.715
Agent output:
<<<unbound>>>
status 0
thread0_num_queries 15588707
thread0_num_queries_ip_ratelimited 0
thread0_num_cachehits 15588703
thread0_num_cachemiss 4
thread0_num_prefetch 0
thread0_num_zero_ttl 0
thread0_num_recursivereplies 4
thread0_requestlist_avg 0
thread0_requestlist_max 0
thread0_requestlist_overwritten 0
thread0_requestlist_exceeded 0
thread0_requestlist_current_all 0
thread0_requestlist_current_user 0
thread0_tcpusage 0
thread1_num_queries 4625290
thread1_num_queries_ip_ratelimited 0
thread1_num_cachehits 4625270
thread1_num_cachemiss 20
thread1_num_prefetch 0
thread1_num_zero_ttl 0
thread1_num_recursivereplies 20
thread1_requestlist_avg 0
thread1_requestlist_max 0
thread1_requestlist_overwritten 0
thread1_requestlist_exceeded 0
thread1_requestlist_current_all 0
thread1_requestlist_current_user 0
thread1_tcpusage 0
thread2_num_queries 1719352
thread2_num_queries_ip_ratelimited 0
thread2_num_cachehits 1719344
thread2_num_cachemiss 8
thread2_num_prefetch 0
thread2_num_zero_ttl 0
thread2_num_recursivereplies 8
thread2_requestlist_avg 0
thread2_requestlist_max 0
thread2_requestlist_overwritten 0
thread2_requestlist_exceeded 0
thread2_requestlist_current_all 0
thread2_requestlist_current_user 0
thread2_tcpusage 0
thread3_num_queries 15583658
thread3_num_queries_ip_ratelimited 0
thread3_num_cachehits 15583658
thread3_num_cachemiss 0
thread3_num_prefetch 0
thread3_num_zero_ttl 0
thread3_num_recursivereplies 0
thread3_requestlist_avg 0
thread3_requestlist_max 0
thread3_requestlist_overwritten 0
thread3_requestlist_exceeded 0
thread3_requestlist_current_all 0
thread3_requestlist_current_user 0
thread3_tcpusage 0
total_num_queries 37517007
total_num_queries_ip_ratelimited 0
total_num_cachehits 37516975
total_num_cachemiss 32
total_num_prefetch 0
total_num_zero_ttl 0
total_num_recursivereplies 32
total_tcpusage 0
mem_cache_rrset 66072
mem_cache_message 66289
mem_mod_iterator 16588
mem_mod_validator 66352
mem_mod_respip 0
mem_streamwait 0
num_query_type_A 37516990
num_query_type_PTR 1
num_query_type_AAAA 16
num_query_class_IN 37517007
num_query_opcode_QUERY 37517007
num_query_tcp 0
num_query_tcpout 0
num_query_tls 0
num_query_tls_resume 0
num_query_ipv6 36356
num_query_flags_QR 0
num_query_flags_AA 0
num_query_flags_TC 0
num_query_flags_RD 37517007
num_query_flags_RA 0
num_query_flags_Z 0
num_query_flags_AD 108911
num_query_flags_CD 0
num_query_edns_present 108911
num_query_edns_DO 0
num_answer_rcode_NOERROR 37516974
num_answer_rcode_FORMERR 0
num_answer_rcode_SERVFAIL 32
num_answer_rcode_NXDOMAIN 1
num_answer_rcode_NOTIMPL 0
num_answer_rcode_REFUSED 0
num_query_ratelimited 0
num_answer_secure 0
num_answer_bogus 0
num_rrset_bogus 0
num_query_aggressive_NOERROR 0
num_query_aggressive_NXDOMAIN 0
unwanted_queries 0
unwanted_replies 0
msg_cache_count 1
rrset_cache_count 0
infra_cache_count 26
key_cache_count 0
num_query_authzone_up 0
num_query_authzone_down 0
regards,
--
Smil Milan Jeskyňka Kazatel
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