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Jack-Benny Persson 2017-01-13 06:09:08 +01:00
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Copyright (C) 2017 Jack-Benny Persson <jack-benny@cyberinfo.se>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

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# check_meteoalarm.php
This is a Nagios plugin written in PHP to look for weather alerts on the site
http://www.meteoalarm.eu. The plugin checks a specific region, which is entered
as the full URL of the region as an argument to the script.
The script is released under GNU GPL and hence I can take no responsibility for
the correctness of the script. It might not work as expected and should not be
be used as a critical tool for weather alerts.
## Requirements
PHP version 5 or higher with cURL. To install these packages on Debian/Ubuntu
enter `sudo apt-get install php5-cli php-curl`. That should be enough to get the
script running.
## Usage
./check_meteoalarm.php [FULL URL]
For example
./check_meteoalarm.php http://www.meteoalarm.eu/en_UK/0/0/SE002-Sk%E5ne.html
Note that the URL must be the english version (en_UK), otherwise the script
can't regex for the correct strings.
### Usage within Nagios (on Debian systems)
**Step 1:** Place the script in `/usr/lib/nagios/plugins/`
**Step 2:** Create the following snippet in `/etc/nagios3/commands.cfg`
define command{
command_name check_meteoalarm
command_line /usr/lib/nagios/plugins/check_meteoalarm.php $ARG1$
}
**Step 3:** Create a service definition for a region, for example in your localhost in
`/etc/nagios3/conf.d/localhost_nagios2.cfg`
define service{
use generic-service
host_name localhost
service_description Meteoalarm Skane
check_interval 15
retry_interval 3
check_command check_meteoalarm!'http://www.meteoalarm.eu/en_UK/0/0/SE002-Sk%E5ne.html'
}

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#!/usr/bin/env php
<?php
/*
Copyright (C) 2017 Jack-Benny Persson <jack-benny@cyberinfo.se>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
This is a small Nagios plugin to warn for severe weather. It gets the data
from meteoalarm.eu. The script takes the full URL of the region your are
interested in. For example:
./check_meteo.php www.meteoalarm.eu/en_UK/0/0/SE002-Sk%E5ne.html
*/
// Sanity check & help text
if ($argc != 2)
{
printf("Please provide a full URL for your region\n");
printf("Usage:\n");
printf("$argv[0] [URL]\n\n");
printf("Please note that you must use the english version of the site/URL\n\n");
printf("Example:\n");
printf("$argv[0] http://www.meteoalarm.eu/en_UK/0/0/SE038-Halland.html\n");
exit(3);
}
// Get HTML-file from Meteoalarm
$url = $argv[1];
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = curl_exec($ch);
curl_close($ch);
// Get all the warnings for the selected region
preg_match_all("/class=\"text\"\>(.*)&nbsp;/i", $data, $warnMatches);
// If no warnings were found, check for the text "No special awarenes required"
// to make sure we're actually scanning a Meteoalarm page. If we're not, print
// an error message about it and exit with code 3 (UNKNOWN).
if (empty($warnMatches[1]))
{
if(preg_match("/No special awareness required/", $data))
{
printf("OK - No warnings for the region\n");
exit(0); // Code 0 = OK
}
else
{
printf("UNKNOWN - That doesn't look like a Meteolarm page, please check the URL.\n");
printf("Make sure you are using the english version of the site.\n");
exit(3); // Code 3 = Unknown
}
}
// There is a warning of some kind...
else
{
// Get the severity of the warning (orange & red = high danger,
// yellow = low danger)
if (preg_match("/Orange/", $data) || preg_match("/Red/", $data))
{
printf("CRITICAL - "); // Start the message with "CRITICAL"
// Loop through all the warnings and print them
foreach($warnMatches[1] as $warn)
printf($warn . "\n");
exit(2); // Code 2 = Critical
}
if (preg_match("/Yellow/", $data))
{
printf("WARNING - "); // Start the message with "WARNING"
// Loop through all the warnings and print them
foreach($warnMatches[1] as $warn)
printf($warn . "\n");
exit(1); // Code 1 = Warning
}
}
?>