Smokeping_probes_AnotherDNS(3) SmokePing Smokeping_probes_AnotherDNS(3)
NAME
Smokeping::probes::AnotherDNS - Alternate DNS Probe
SYNOPSIS
*** Probes ***
+AnotherDNS
forks = 5
offset = 50%
step = 300
# The following variables can be overridden in each target section
/^influx_.+/ = influx_location = In the basement
authoritative = 0
expect_text = 192.168.50.60
ipversion = 4
lookup = www.example.org
mininterval = 0.5
pings = 5
port = 53
protocol = udp
recordtype = A
require_answers = 0
require_noerror = 0
require_nxdomain = 0
timeout = 5
# [...]
*** Targets ***
probe = AnotherDNS # if this should be the default probe
# [...]
+ mytarget
# probe = AnotherDNS # if the default probe is something else
host = my.host
/^influx_.+/ = influx_location = In the basement
authoritative = 0
expect_text = 192.168.50.60
ipversion = 4
lookup = www.example.org
mininterval = 0.5
pings = 5
port = 53
protocol = udp
recordtype = A
require_answers = 0
require_noerror = 0
require_nxdomain = 0
timeout = 5
DESCRIPTION
Like DNS, but uses Net::DNS and Time::HiRes instead of dig. This probe
does *not* retry the request three times before it is considered
"lost", like dig and other resolver do by default. If operating as
caching Nameserver, BIND (and maybe others) expect clients to retry the
request if the answer is not in the cache. So, ask the nameserver for
something that he is authoritative for if you want measure the network
packet loss correctly.
If you have a really fast network and nameserver, you will notice that
this probe reports the query time in microsecond resolution. :-)
VARIABLES
Supported probe-specific variables:
forks
Run this many concurrent processes at maximum
Example value: 5
Default value: 5
offset
If you run many probes concurrently you may want to prevent them
from hitting your network all at the same time. Using the probe-
specific offset parameter you can change the point in time when
each probe will be run. Offset is specified in % of total interval,
or alternatively as 'random', and the offset from the 'General'
section is used if nothing is specified here. Note that this does
NOT influence the rrds itself, it is just a matter of when data
acquisition is initiated. (This variable is only applicable if the
variable 'concurrentprobes' is set in the 'General' section.)
Example value: 50%
step
Duration of the base interval that this probe should use, if
different from the one specified in the 'Database' section. Note
that the step in the RRD files is fixed when they are originally
generated, and if you change the step parameter afterwards, you'll
have to delete the old RRD files or somehow convert them. (This
variable is only applicable if the variable 'concurrentprobes' is
set in the 'General' section.)
Example value: 300
Supported target-specific variables:
/^influx_.+/
This is a tag that will be sent to influxdb and has no impact on
the probe measurement. The tag name will be sent without the
"influx_" prefix, which will be replaced with "tag_" instead. Tags
can be used for filtering.
Example value: influx_location = In the basement
authoritative
Send non-recursive queries and require authoritative answers.
Default value: 0
expect_text
A string that should be present in the DNS answer. This can be used
to verify that an A record contains the expected IP address, a PTR
record reflects the expected hostname, etc. If the query returns
multiple records, any single match will pass the test.
Example value: 192.168.50.60
ipversion
The IP protocol used. Possible values are "4" and "6". Passed to
echoping(1) as the "-4" or "-6" options.
Example value: 4
Default value: 4
lookup
Name of the host to look up in the dns.
Example value: www.example.org
mininterval
Minimum time between sending two lookup queries in (possibly
fractional) seconds.
Default value: 0.5
pings
How many pings should be sent to each target, if different from the
global value specified in the Database section. Note that the
number of pings in the RRD files is fixed when they are originally
generated, and if you change this parameter afterwards, you'll have
to delete the old RRD files or somehow convert them.
Example value: 5
port
The UDP Port to use.
Default value: 53
protocol
The Network Protocol to use.
Default value: udp
recordtype
Record type to look up.
Default value: A
require_answers
Only Count Answers with answer count >= this value.
Default value: 0
require_noerror
Only Count Answers with Response Status NOERROR.
Default value: 0
require_nxdomain
Set to 1 if NXDOMAIN should be interpreted as success instead of
failure. This reverses the normal behavior of the probe. Example
uses include testing a DNS firewall, verifying that a mail server
IP is not listed on a DNSBL, or other scenarios where NXDOMAIN is
desired.
Example value: 0
Default value: 0
timeout
Timeout for a single request in seconds.
Default value: 5
AUTHORS
Christoph Heine <Christoph.Heine@HaDiKo.DE>
2.8.0 2021-08-11 Smokeping_probes_AnotherDNS(3)
smokeping 2.8.0 - Generated Thu Aug 12 07:56:44 CDT 2021