Pyng: DNS check

Options

DNS supports following options, which may be used upon creation of a new check object:

qname

Name of the resource record to look up (required)

qtype

Query type

qclass

Query class

reverse

Set to True to perform simplified reverse lookups for mapping addresses to names

trace

Set to True to trace he delegation path from the root name servers for the name being looked up

dnssec

Set to True to enable DNSSEC in the query

server

Target server for the query

port

Port to connect to instead of the default of 53

proto

TCP or UDP transport for the connection

ipv

IP version to use when resolving addresses (IPv6 or IPv4)

In addition, DNS supports following generic check settings:

desc

Check description

silent

Information about check runs is not output by certain runners

interval

Number of seconds between check runs

result

Require that check output matches result in order to consider check successful. During the matching, check output is evaluated as a list of lines of output without newlines. result may be provided in multiple ways:

None: always succeeds
string: succeeds if any line in the check's output is equal to, or contains, result
list or a tuple: succeeds if all elements of result are present in the check's output (i.e. set of result items is a subset of check output items)
set: succeeds if all lines in the check's output are present in result (i.e. check output is a subset of the set of result items)
Compiled regular expression object: succeeds if any line in the check's output matches result

alert

Callable (or a list of callables) to run in order to alert of check status changes

notify

Callable (or a list of callables) to run in order to notify of changes in check's output

run_condition

Callable to run to decide if check run should be skipped

run_threshold

Threshold for mean run time in order to consider check to be degraded

result_filter

Callable to run to filter check command output lines prior to matching check results

on_result

on_first

on_up

on_down

on_degrade

on_restore

on_change

Callable to run with the result of the check on the specified events

# do a DNSSEC enabled TXT query and check that the result includes the
# string "pong"
DNS(
    'ping.krot.org', 'txt',
    dnssec=True,
    result=lambda x: True if any(['pong' in y for y in x]) else False,
)

Description

Options

Example