added build_master_ssh_tunnel

build_master_ssh_tunnel

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+STATE_OK=0
+STATE_WARNING=1
+STATE_CRITICAL=2
+STATE_UNKNOWN=3
+STATE_DEPENDENT=4
+
+HOSTNAME="$1"
+PORT="$2"
+CONFIG="/etc/icinga/ssh_config"
+SOCKET="/var/run/icinga/ssh@${HOSTNAME}:${PORT}.sock"
+KEY="/etc/icinga/nagios_sshkey"
+
+if [ $# -lt 2 ]; then
+    echo "usage: $(basename "$0") <host> <port>"
+    exit
+fi
+
+if [ -S "${SOCKET}" ]; then
+    echo "OK - Tunnel exists"
+    exit $STATE_OK
+elif [ ! -f "${KEY}" ]; then
+    echo "CRITICAL - keyfile missing: ${KEY}"
+    exit $STATE_CRITICAL
+elif [ ! -d "$(dirname "${SOCKET}")" ]; then
+    echo "CRITICAL - socket directory missing: $(dirname "${SOCKET}")"
+    exit $STATE_CRITICAL
+else
+    # start ssh with all file descriptors closed/nulled so that the check doesn't hang
+    /usr/bin/ssh -nNMf -p "${PORT}" -i "${KEY}" -F "${CONFIG}" "${HOSTNAME}" >/dev/null 2>&1 3>&- 4>&- 5>&- 6>&-
+    if [ $? -ne 0 ] ; then
+        echo "CRITICAL - Tunnel creation failed"
+        exit $STATE_CRITICAL
+    else
+        echo "OK - Tunnel established"
+        exit $STATE_OK
+    fi
+fi