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aptChecker - Keeping too many things updated - M0YNG.uk

Created 2020-08-26

Modified 2021-02-10

Linux
Hacking

It's an obvious problem to me that I have too many computers, and keeping on top of which have been updated recently is... not simple.

I've finally got around to making a semi solution, using a bash script and some PHP! Is there a better way? Almost certainly! Would it work easily and quickly on even a raspberry pi v1 and zero without stopping them doing the thing I want them to do? Maybe not.

Update

=> I've added some new bits (remote server checks), detailed in part two

=> Pager showing that radiopi-10 has 18 updates available [IMG]

The Bits

A bash script which runs apt update and then apt list --upgradeable to count how many packages could be updated.
That file is in /etc/cron.daily/ so should run every day
A PHP file that gets info from the script and stores it in a json file, but also:
Sends a page via DAPNET if there are more than 0 packages
Provides a quick reference html page
Also json

The page is simple, and looks like this (I could probably format the date time, but meh.)

=> Screenshot white text on black in a table showing update counts for different systems [IMG]

The code

aptChecker.sh

#!/bin/bash

hostname=$(hostname)
datetime=$(date --iso-8601=seconds)

apt update

updatecount=$(apt list --upgradeable | wc -l)

# correct for always getting at least one, even if there are none
updatecount=$((updatecount - 1))

echo $updatecount

curl -X POST -F "hostname=$hostname" -F "datetime=$datetime" -F "updatecount=$updatecount" http://myserver/aptCounter.php

aptCounter.php

 (string) $_POST['hostname'],
        "datetime" => (string) $_POST['datetime'],
        "updatecount" => (int) $_POST['updatecount'],
    ];

    $hostname = $newEntry->hostname;

    $aptCounterData[$newEntry->hostname] = $newEntry;

    file_put_contents("aptCounter.json", json_encode($aptCounterData));
    if ($newEntry->updatecount > 0) {
        echo $newEntry->updatecount;
        $url = 'http://www.hampager.de:8080/calls';
        $data = array('text' => "M0YNG: $newEntry->hostname has $newEntry->updatecount updates available.", 'callSignNames' => ['m0yng'], 'transmitterGroupNames' => ['UK-ALL'], 'emergency' => 'false');
        $auth = base64_encode('m0yng:mypassword');

        $options = array(
            'http' => array(
                'header' => "Content-type: application/json\r\nAuthorization: Basic $auth",
                'method' => 'POST',
                'content' => json_encode($data),
            ),
        );
        $context = stream_context_create($options);
        $result = file_get_contents($url, false, $context);

        var_dump($result);

    }

    echo "Done.";
    exit();
} else if ($_SERVER['QUERY_STRING'] == 'format=json') {
    header('Content-Type: application/json');

    echo json_encode($aptCounterData);
} else {
    usort($aptCounterData, function ($a, $b) {return $a['updatecount'] < $b['updatecount'];});
    ?>




  
  
  aptChecker Counts
  



aptChecker Counts


 0) {

        }
        $host['goodbad'] = ($host['updatecount'] > 0 ? 'bad' : 'good');
        echo "";
    }
    ?>


Hostname DateTime Update Count

${host['hostname']} ${host['datetime']} ${host['updatecount']}

Hostname	DateTime	Update Count
${host['hostname']}	${host['datetime']}	${host['updatecount']}

-+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+-

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