Update Smokeping.md

doc/Extensions/Smokeping.md

@@ -43,3 +43,118 @@ $config['own_hostname']
 ```
 
 You should now see a new tab in your device page called ping.
+
+
+
+
+Install and integrate Smokeping [Debian/Ubuntu]
+
+> This guide assumes you have already <a href="http://docs.librenms.org/Installation/Installation-(Debian-Ubuntu)/">installed librenms</a>, and you installed apache2 in the process. Tested with Ubuntu 14.04 and Apache 2.4.
+
+Nearly everything we do will require root, and at one point we'll encounter a problem if we just use sudo, so we'll just switch to root at the beginning...
+
+```bash
+sudo su -
+```
+
+### Install Smokeping ###
+
+```bash
+apt-get install smokeping
+```
+
+At the end of installation, you may have gotten this error: `ERROR: /etc/smokeping/config.d/pathnames, line 1: File '/usr/sbin/sendmail' does not exist`
+
+If so, just edit smokeping's pathnames.
+
+```bash
+nano /etc/smokeping/config.d/pathnames
+```
+
+Comment out the first line:
+
+```bash
+#sendmail = /usr/sbin/sendmail
+```
+
+Exit and save.
+
+Check if the smokeping config file was created for apache2:
+
+```bash
+ls /etc/apache2/conf-available/
+```
+
+If you don't see `smokeping.conf` listed, you'll need to create a symlink for it:
+
+```bash
+ln -s /etc/smokeping/apache2.conf /etc/apache2/conf-available/smokeping.conf
+```
+
+Edit the smokeping config so smokeping knows the hostname it's running on:
+
+```bash
+nano /etc/smokeping/config.d/General
+```
+
+Change the `cgiurl` value to `http://yourhost/cgi-bin/smokeping.cgi`
+Modify any other values you wish, then exit and save.
+
+### LibreNMS integration ###
+
+So far this is a relatively normal Smokeping installation; next we'll set up the LibreNMS integration.
+
+Generate the configuration file so Smokeping knows the hosts you have set up for monitoring in LibreNMS.
+
+```bash
+cd /opt/librenms/scripts/
+(echo "+ LibreNMS"; php ./gen_smokeping.php) > /etc/smokeping/config.d/librenms.conf
+```
+
+Add a cron job so as you add or remove hosts in librenms they'll get updated with Smokeping.
+
+```bash
+crontab -e
+```
+
+Add the example cron below; it's set to run daily at 02:05
+`05 02 * * * root cd /opt/librenms/scripts && (echo "+ LibreNMS"; php ./gen_smokeping.php) > /etc/smokeping/config.d/librenms.conf && service smokeping reload >> /dev/null`
+Exit and save.
+
+Include `librenms.conf` in smokeping's config:
+```bash
+nano /etc/smokeping/config
+```bash
+
+Add the following line at the end:
+`@include /etc/smokeping/config.d/librenms.conf`
+Exit and save.
+
+### Configure LibreNMS ###
+
+```bash
+nano /opt/librenms/config.php
+```
+
+Scroll to the bottom, and paste in the following:
+
+`$config['smokeping']['dir'] = '/var/lib/smokeping';
+$config['smokeping']['integration'] = true;
+Exit and save.`
+
+Run the following commands:
+```bash
+a2enconf smokeping
+a2enmod cgid
+service apache2 restart
+service smokeping restart
+```
+
+Switch back to your regular user account
+
+```bash
+su librenms
+```
+
+Done! You should be able to load the Smokeping web interface at `http://yourhost/cgi-bin/smokeping.cgi`
+In LibreNMS, a Ping tab should also appear.