SFTP file existence monitor
Problem this snippet solves: SFTP file existence monitor How to use this snippet: This monitor definition allows for a monitor to connect to a SFTP server and check for the existence of a file using username/password. Written for a specific implementation where they wouldn't use key pairs, plus it turns out that curl on F5's was compiled with sftp support disabled, so I had to use expect instead. It's based off of the default sample_monitor. Create a monitor definition with 3 variables: $monitor_sftp_USER = Username of SFTP server $monitor_sftp_PASS = Password for $monitor_sftp_USER $monitor_sftp_STRING` = String/Filename to search for I have also written a modified version whereby you can encrypt the password manually using the unit master-key and add that as the password variable, which I can post if wanted. Code : #!/bin/sh # # (c) Copyright 1996-2006, 2010-2013 F5 Networks, Inc. # # This software is confidential and may contain trade secrets that are the # property of F5 Networks, Inc. No part of the software may be disclosed # to other parties without the express written consent of F5 Networks, Inc. # It is against the law to copy the software. No part of the software may # be reproduced, transmitted, or distributed in any form or by any means, # electronic or mechanical, including photocopying, recording, or information # storage and retrieval systems, for any purpose without the express written # permission of F5 Networks, Inc. Our services are only available for legal # users of the program, for instance in the event that we extend our services # by offering the updating of files via the Internet. # # @(#) $Id: //depot/maint/bigip12.1.1/tm_daemon/monitors/sample_monitor#1 $ # # # these arguments supplied automatically for all external pingers: # $1 = IP (::ffff:nnn.nnn.nnn.nnn notation or hostname) # $2 = port (decimal, host byte order) # # The following must all be set as variables in the monitor definition # $monitor_sftp_USER = Username of SFTP server # $monitor_sftp_PASS = Password for $monitor_sftp_USER # $monitor_sftp_STRING` = String/Filename to search for # # $MONITOR_NAME = name of the monitor # # In this sample script, $3 is the regular expression # # Name of the pidfile pidfile="/var/run/$MONITOR_NAME.$1..$2.pid" # Send signal to the process group to kill our former self and any children # as external monitors are run with SIGHUP blocked if [ -f $pidfile ] then kill -9 -`cat $pidfile` > /dev/null 2>&1 fi echo "$$" > $pidfile # Remove the IPv6/IPv4 compatibility prefix node_ip=`echo $1 | sed 's/::ffff://'` # Using expect and sftp to get directory listing from the server. # Search the data received for the expected string. expect -c " spawn sftp -oStrictHostKeyChecking=no -oPort=$2 $monitor_sftp_USER@$node_ip; expect \"password:\"; send $monitor_sftp_PASS\r; expect \"sftp>\"; send \"ls -l\r\"; expect \"sftp>\"; send \"exit\r\" " | grep $monitor_sftp_STRING > /dev/null status=$? if [ $status -eq 0 ] then # Remove the pidfile before the script echoes anything to stdout and is killed by bigd rm -f $pidfile echo "up" fi # Remove the pidfile before the script ends rm -f $pidfile Tested this on version: 12.1