dnsclient

#!/bin/sh
# Copyright (C) 2019 Checkmk GmbH - License: GNU General Public License v2
# This file is part of Checkmk (https://checkmk.com). It is subject to the terms and
# conditions defined in the file COPYING, which is part of this source code package.

# Reason for this no-op: shellcheck disable=... before the first command disables the error for the
# entire script.
:

# Disable unused variable error (needed to keep track of version)
# shellcheck disable=SC2034
CMK_VERSION="2.4.0b1"

# This check can be used to test the name resolution of a given host
# address using the local resolver of the system this script is
# running on.

HOSTADDRESSES=mathias-kettner.de
HOSTADDRESSES6=mathias-kettner.de

# shellcheck source=agents/cfg_examples/dnsclient.cfg
. "/etc/check_mk/dnsclient.cfg" #  2>/dev/null

echo "<<<mrpe>>>"
for HOSTADDRESS in $HOSTADDRESSES; do
    ADDRESSES=$(dig +short +noall +answer "$HOSTADDRESS" A)
    if [ ! "$ADDRESSES" ]; then
        STATE=2
        OUTPUT="CRIT - $HOSTADDRESS could not be resolved"
    else
        STATE=0
        OUTPUT="OK - $HOSTADDRESS resolved into $ADDRESSES"
    fi
    echo "Resolve_$HOSTADDRESS $STATE $OUTPUT"
done

for HOSTADDRESS6 in $HOSTADDRESSES6; do
    ADDRESSES=$(dig +short +noall +answer "$HOSTADDRESS6" AAAA)
    if [ ! "$ADDRESSES" ]; then
        STATE=2
        OUTPUT="CRIT - $HOSTADDRESS could not be resolved"
    else
        STATE=0
        OUTPUT="OK - $HOSTADDRESS6 resolved into $ADDRESSES"
    fi
    echo "Resolve_$HOSTADDRESS6 $STATE $OUTPUT"
done