Différences

Ci-dessous, les différences entre deux révisions de la page.

--- tech:script_ha_supersivion_nagios_routeur_actif_par_snmp [2025/03/24 15:06] – créée - modification externe 127.0.0.1
+++ tech:script_ha_supersivion_nagios_routeur_actif_par_snmp [2025/03/24 16:25] (Version actuelle) – Jean-Baptiste
@@ Ligne 1: / Ligne 1: @@
+<!DOCTYPE markdown>
+{{tag>Brouillon Supervision Nagios Routeur SNMP Script}}
+# Script HA supersivion Nagios routeur actif par SNMP
+''check_snmp_active_router.sh''
+~~~bash
+#! /bin/bash
+# Creative Commons CC0 Public Domain Licence
+set -euo pipefail
+IFS=$' \t\n'
+export LC_ALL=C
+OID_HOSTNAME=.1.3.6.1.2.1.1.5.0
+LABEL="ACTIVE_ROUTER"
+ALL_ARGS=("$@")
+exec 6>&1 # Link file descriptor #6 with stdout. Saves stdout.
+# FIX IGNORED ~/.snmp/snmp.conf WHEN 'sudo -u nagios check_snmp_host.sh'
+HOME=$(getent passwd "$(whoami)" | cut -d: -f6)
+PATH="/sbin:/usr/sbin:$PATH"
+exit_malfunction() {
+	exec 1>&6 6>&- # Restore stdout and close file descriptor #6
+	echo "${LABEL} ${STATUS_MSG} - ERROR $*"
+	exit 3
+}
+# NAGIOS EXIT STATUS
+# STATE_OK=0 ; STATE_WARNING=1 ; STATE_CRITICAL=2 ; STATE_UNKNOWN=3; STATE_DEPENDENT=4
+STATUS_MSG=UNKNOWN
+typeset -i STATUS_CODE=3
+trap 'if [ $STATUS_CODE -eq 3 ] && [ $? -ne 0 ] ; then
+  exit_malfunction "Unexpected error"
+fi' EXIT ERR
+command_exists() {
+	command -v "$1" >/dev/null 2>&1 || (
+		exit_malfunction "I require $1 but it's not installed. Aborting."
+	)
+}
+command_exists snmpget
+get_defaultgw() {
+	ip -4 route show default | awk '/^default/ { print $3 }' || exit_malfunction "Can't get default gateway"
+}
+get_hostname() {
+	local REMOTE_HOST=$1
+	ROUTER_NAME=$(snmpget -r 2 "${ALL_ARGS[@]}" "$REMOTE_HOST" "${OID_HOSTNAME}" | cut -d= -f2 | cut -d: -f2 | xargs) || exit_malfunction "SNMP failed"
+}
+main() {
+	local DEFAULTGW
+	local -i ROUTER_NB
+	DEFAULTGW=$(get_defaultgw)
+	get_hostname "$DEFAULTGW"
+	ROUTER_NB=$(echo "$ROUTER_NAME" | grep -o -e '[0-9]\+$') || exit_malfunction "Hostname error in '$ROUTER_NAME' for $DEFAULTGW"
+	if [ "$ROUTER_NB" -eq 1 ]; then
+		STATUS_CODE=0
+		STATUS_MSG=OK
+	elif [ "$ROUTER_NB" -eq 2 ]; then
+		STATUS_CODE=1
+		STATUS_MSG=WARNING
+	else
+		STATUS_CODE=2
+		STATUS_MSG=CRITICAL
+	fi
+	echo "${LABEL} ${STATUS_MSG} - $ROUTER_NAME is active router"
+}
+main
+exit $STATUS_CODE
+~~~
+FIXME