Checkmk Apache_status Activate Plugin

The mod_status module is an Apache module that allows users to access highly detailed information about Apache’s performance on a plain HTML page.

Enable mod_status

$ ls /etc/apache2/mods-enabled/ | grep status
status.conf
status.load

By default, Apache ships with the mod_status module already enabled. Ensure that the status.conf and status.load files are present. If not, you need to enable mod_status module by invoking the command:

$ sudo a2enmod status

Configure mod_status

$ sudo vim /etc/apache2/mods-enabled/status.conf

checkmk-activate-apache-status-plugin-01

Set the Require ip directive to reflect the IP address of the machine that you will be accessing the server from. For CheckMK apache_status plugin use default directive.

Check Apache Server Status

Display only Response Headers in curl:

$ curl --head http://localhost:8080/server-status
HTTP/1.1 200 OK
Date: Tue, 15 Aug 2023 03:48:53 GMT
Server: Apache/2.4.18 (Ubuntu)
Vary: Accept-Encoding
Content-Length: 27178
Content-Type: text/html; charset=ISO-8859-1

Port number 8080 is used for web servers.

$ curl  http://localhost:8080/server-status | less

output:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<html><head>
<title>Apache Status</title>
</head><body>
<h1>Apache Server Status for localhost (via ::1)</h1>

<dl><dt>Server Version: Apache/2.4.18 (Ubuntu) OpenSSL/1.0.2g</dt>
<dt>Server MPM: prefork</dt>
<dt>Server Built: 2019-08-26T13:43:29
</dt></dl><hr /><dl>
<dt>Current Time: Tuesday, 15-Aug-2023 10:52:34 +07</dt>
<dt>Restart Time: Saturday, 12-Aug-2023 04:13:03 +07</dt>
<dt>Parent Server Config. Generation: 5</dt>
<dt>Parent Server MPM Generation: 4</dt>
<dt>Server uptime:  3 days 6 hours 39 minutes 31 seconds</dt>
<dt>Server load: 0.90 0.75 0.77</dt>
<dt>Total accesses: 55664 - Total Traffic: 507.4 MB</dt>
<dt>CPU Usage: u1632.1 s160.9 cu0 cs0 - .633% CPU load</dt>
<dt>.197 requests/sec - 1878 B/second - 9.3 kB/request</dt>
<dt>28 requests currently being processed, 33 idle workers</dt>
</dl><pre>_RWRR_.RR_R_R______R_.RR_.__R._WWW.K_RW_._KW.__K_R.W_W_W.R..._.R
_.._.__._........_.._.W......_....._............................
................................................................
........</pre>
<p>Scoreboard Key:<br />
"<b><code>_</code></b>" Waiting for Connection, 
"<b><code>S</code></b>" Starting up, 
"<b><code>R</code></b>" Reading Request,<br />
"<b><code>W</code></b>" Sending Reply, 
"<b><code>K</code></b>" Keepalive (read)

Donwload Plugin to Agent

Setup > Linux > Plugins

Copy apache_status.py and apache_status_2.py plugins url

checkmk-activate-apache-status-plugin-02

On Agent:

Replace http://CmkServer/CmkSiteName/ with your config

$ cd /usr/lib/check_mk_agent/plugins/
$ sudo wget http://CmkServer/CmkSiteName/check_mk/agents/plugins/apache_status.py
$ sudo wget http://CmkServer/CmkSiteName/check_mk/agents/plugins/apache_status_2.py

$ ls -l
total 24
-rw-r--r-- 1 root root 10811 Jul 25 14:21 apache_status.py
-rw-r--r-- 1 root root 10950 Jul 25 13:43 apache_status_2.py

Change mode to Execute

$ sudo chmod +x apache_status.py apache_status_2.py 
$ ls -l
total 24
-rwxr-xr-x 1 root root 10811 Jul 25 14:21 apache_status.py
-rwxr-xr-x 1 root root 10950 Jul 25 13:43 apache_status_2.py