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Linux script to check IMAP status
Posted on 2009-05-18
Hi,
I'm looking for a bash script (example) that executes some commands depending on if a certain (IMAP) server is on-line.
What is the best way to do this?
For example: ping the server and depending on the response execute some commands.
Thank in advance.
Onno
I'm looking for a bash script (example) that executes some commands depending on if a certain (IMAP) server is on-line.
What is the best way to do this?
For example: ping the server and depending on the response execute some commands.
Thank in advance.
Onno
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7 Comments
I'd use the Nagios IMAP check as it is very comprehensive.
# ./check_imap -h
check_imap v1991 (nagios-plugins 1.4.13)
Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>
Copyright (c) 1999-2008 Nagios Plugin Development Team
<nagiosplug-devel@lists.so
This plugin tests IMAP connections with the specified host (or unix socket).
Usage:check_imap -H host -p port [-w <warning time>] [-c <critical time>] [-s <send string>]
[-e <expect string>] [-q <quit string>][-m <maximum bytes>] [-d <delay>]
[-t <timeout seconds>] [-r <refuse state>] [-M <mismatch state>] [-v] [-4|-6] [-j]
[-D <days to cert expiry>] [-S <use SSL>] [-E]
Options:
-h, --help
Print detailed help screen
-V, --version
Print version information
-H, --hostname=ADDRESS
Host name, IP Address, or unix socket (must be an absolute path)
-p, --port=INTEGER
Port number (default: none)
-4, --use-ipv4
Use IPv4 connection
-6, --use-ipv6
Use IPv6 connection
-E, --escape
Can use \n, \r, \t or \ in send or quit string. Must come before send or quit option
Default: nothing added to send, \r\n added to end of quit
-s, --send=STRING
String to send to the server
-e, --expect=STRING
String to expect in server response (may be repeated)
-A, --all
All expect strings need to occur in server response. Default is any
-q, --quit=STRING
String to send server to initiate a clean close of the connection
-r, --refuse=ok|warn|crit
Accept tcp refusals with states ok, warn, crit (default: crit)
-M, --mismatch=ok|warn|crit
Accept expected string mismatches with states ok, warn, crit (default: warn)
-j, --jail
Hide output from TCP socket
-m, --maxbytes=INTEGER
Close connection once more than this number of bytes are received
-d, --delay=INTEGER
Seconds to wait between sending string and polling for response
-D, --certificate=INTEGER
Minimum number of days a certificate has to be valid.
-S, --ssl
Use SSL for the connection.
-w, --warning=DOUBLE
Response time to result in warning status (seconds)
-c, --critical=DOUBLE
Response time to result in critical status (seconds)
-t, --timeout=INTEGER
Seconds before connection times out (default: 10)
-v, --verbose
Show details for command-line debugging (Nagios may truncate output)
# ./check_imap -h
check_imap v1991 (nagios-plugins 1.4.13)
Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>
Copyright (c) 1999-2008 Nagios Plugin Development Team
<nagiosplug-devel@lists.so
This plugin tests IMAP connections with the specified host (or unix socket).
Usage:check_imap -H host -p port [-w <warning time>] [-c <critical time>] [-s <send string>]
[-e <expect string>] [-q <quit string>][-m <maximum bytes>] [-d <delay>]
[-t <timeout seconds>] [-r <refuse state>] [-M <mismatch state>] [-v] [-4|-6] [-j]
[-D <days to cert expiry>] [-S <use SSL>] [-E]
Options:
-h, --help
Print detailed help screen
-V, --version
Print version information
-H, --hostname=ADDRESS
Host name, IP Address, or unix socket (must be an absolute path)
-p, --port=INTEGER
Port number (default: none)
-4, --use-ipv4
Use IPv4 connection
-6, --use-ipv6
Use IPv6 connection
-E, --escape
Can use \n, \r, \t or \ in send or quit string. Must come before send or quit option
Default: nothing added to send, \r\n added to end of quit
-s, --send=STRING
String to send to the server
-e, --expect=STRING
String to expect in server response (may be repeated)
-A, --all
All expect strings need to occur in server response. Default is any
-q, --quit=STRING
String to send server to initiate a clean close of the connection
-r, --refuse=ok|warn|crit
Accept tcp refusals with states ok, warn, crit (default: crit)
-M, --mismatch=ok|warn|crit
Accept expected string mismatches with states ok, warn, crit (default: warn)
-j, --jail
Hide output from TCP socket
-m, --maxbytes=INTEGER
Close connection once more than this number of bytes are received
-d, --delay=INTEGER
Seconds to wait between sending string and polling for response
-D, --certificate=INTEGER
Minimum number of days a certificate has to be valid.
-S, --ssl
Use SSL for the connection.
-w, --warning=DOUBLE
Response time to result in warning status (seconds)
-c, --critical=DOUBLE
Response time to result in critical status (seconds)
-t, --timeout=INTEGER
Seconds before connection times out (default: 10)
-v, --verbose
Show details for command-line debugging (Nagios may truncate output)
That is too advanced a solution for me, this is just to automate some stuff on my laptop.
A script that just checks if a server can be reached and if it can reach the server it should execute some commands.
A script that just checks if a server can be reached and if it can reach the server it should execute some commands.
Checking whether a particular port is responding or not is straight forward, but once you add in the requirement to execute commands and check the response/status, then it becomes a lot more complicated.
Do you have a specific example of the IMAP commands you want to run?
Do you have a specific example of the IMAP commands you want to run?
No not at this point.
I think a simple ping can suffice, if the server can be reached it should run a script, it can be any script.
I think a simple ping can suffice, if the server can be reached it should run a script, it can be any script.
Hi,
i have attached my script that i use for HTTP and others i modified it for IMAP server and it will mail the status of imap server to u(root) if its running or not.
You can chage port according to urs need i.e 993 to 995 in the script
You can add more services status like ntp everthing will be same.
Cheers
i have attached my script that i use for HTTP and others i modified it for IMAP server and it will mail the status of imap server to u(root) if its running or not.
You can chage port according to urs need i.e 993 to 995 in the script
You can add more services status like ntp everthing will be same.
Cheers
#!/bin/bash
###### IMAPs SECTION ###########
netstat -ntulp | grep 993 > /dev/null
IMAPs="$?"
if [ $IMAPs -eq 0 ];then
echo "On $(date '+%F at %r') IMAPs is up and listening" | mail -s "IMAPs server status" root
else
echo "On $(date '+%F %r') IMAP is not running" | mail -s "IMAPs server is down and needs yours attention immediatly" root
fi
The script turned out to be not exactly what I needed as it tests for a local IMAP server, I want to check if a remote (IMAP) server can be reached. Basically I want to check if I'm connected to the network.
But I could change the script a bit easily to my needs by using a ping command.
But I could change the script a bit easily to my needs by using a ping command.
#!/bin/bash
ping -c 1 myimapserver | grep "1 received" > /dev/null
RESULT="$?"
if [ $RESULT -eq 0 ];then
echo "On $(date '+%F at %r') server found"
else
echo "On $(date '+%F %r') server is not found"
fi
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