nagios: Add support for Kerberos KDC service target.

nagios/files/check_kdc

@@ -0,0 +1,92 @@
+#!/bin/sh
+#
+# Check kerberos 5 KDC server.
+#
+# usage:
+#
+#     check_kdc -H <hostname> [-P <principal>] [-k <keytab>]
+#
+
+print_usage() {
+    echo "`basename $0` -H <hostname> -r <realm> [-P <principal>] [-k <keytab>]"
+}
+
+# set defaults
+TARGET=""
+REALM=""
+PRINCIPAL="host/`hostname`"
+KEYTAB="/etc/krb5.keytab"
+
+while test -n "$1" ; do
+    case "$1" in
+	--help|-h)
+	    print_usage
+	    exit 0
+	    ;;
+	-H)
+	    TARGET="$2"
+	    shift
+	    ;;
+	-P)
+	    PRINCIPAL="$2"
+	    shift
+	    ;;
+	-k)
+	    KEYTAB="$2"
+	    shift
+	    ;;
+	-r)
+	    REALM="$2"
+	    shift
+	    ;;
+	*)
+	    echo "Unknown argument: $1" 1>&2
+	    print_usage 1>&2
+	    exit 3
+    esac
+    shift
+done
+
+if [ "${TARGET}" = "" ]; then
+    echo "Missing hostname" 1>&2
+    print_usage 1>&2
+    exit 3
+elif [ "${REALM}" = "" ]; then
+    # try to get realm from principal
+    REALM=`echo "${PRINCIPAL}" | sed -n 's/.*@\(.*\)$/\1/p'`
+    if [ "${REALM}" = "" ]; then
+	echo "Missing realm" 1>&2
+	print_usage 1>&2
+	exit 3
+    fi
+fi
+
+export KRB5_CONFIG="`mktemp /tmp/krb5.conf.XXXXXXXXXX`"
+
+cat <<EOF > ${KRB5_CONFIG}
+[libdefaults]
+  default_realm = ${REALM}
+  dns_lookup_realm = false
+  dns_lookup_kdc = false
+
+[realms]
+  ${REALM} = {
+    kdc = ${TARGET}
+  }
+EOF
+
+MESSAGE="`kinit -k -t ${KEYTAB} -c MEMORY: -P ${PRINCIPAL} 2>&1`"
+if [ $? -eq 0 ]; then
+    MESSAGE="OK"
+    RETVAL=0
+else
+    MESSAGE="CRITICAL: `echo ${MESSAGE} | sed -e 's/^kinit: //'`"
+    RETVAL=2
+fi
+
+kdestroy -c MEMORY: > /dev/null 2>&1
+
+rm -f ${KRB5_CONFIG}
+
+echo ${MESSAGE}
+exit ${RETVAL}

nagios/files/commands.cfg

@@ -155,6 +155,13 @@ define command{
         }
 
 
+# 'check_kdc' command definition
+define command{
+	command_name	check_kdc
+	command_line	$USER1$/check_kdc -H $HOSTADDRESS$ $ARG1$
+	}
+
+
 # 'check_ldap' command definition
 define command{
 	command_name	check_ldap
@@ -273,7 +280,6 @@ define command{
 	}
 
 
-
 ################################################################################
 #
 # SAMPLE PERFORMANCE DATA COMMANDS