Grimsy's Blog » sysadmin

Utilising old desktops around the office

Geoff Jacobs — Tue, 26 May 2009 05:27:00 +0000

So over the years, we have some old desktops in the office which aren’t really good enough to use for development any more. I’ve started breathing new life into them by using them to backup our Subversion repositories by using svnsync.
By setting up cron jobs to sync every x minutes or even hours you can have a huge amount of redundancy for next to no cost.
The read only mirrors are also handy for other applications that create load on your repositories (build servers etc) so I use a near real-time mirror to run trac and our Bamboo server from.

mysql schema…. finally

Geoff Jacobs — Fri, 17 Apr 2009 05:20:00 +0000

I know this has taken waaay to long to post. But here it is if anyone still wants it.

# CREATE DATABASE voip;
# USE voip;

#
# TABLE structure FOR TABLE 'allocation'
#

# DROP TABLE IF EXISTS allocation;
CREATE TABLE `allocation` (
`allocation_id` int(11) NOT NULL AUTO_INCREMENT,
`asset_id` int(11) NOT NULL DEFAULT '0',
`site_id` int(11) NOT NULL DEFAULT '0',
`extension` int(11) NOT NULL DEFAULT '0',
PRIMARY KEY (`allocation_id`)
) ENGINE=MyISAM AUTO_INCREMENT=58 DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;

#
# TABLE structure FOR TABLE 'asset'
#

# DROP TABLE IF EXISTS asset;
CREATE TABLE `asset` (
`asset_id` int(11) NOT NULL AUTO_INCREMENT,
`manufacturer` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`model` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`serial` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`mac` varchar(12) collate latin1_general_ci NOT NULL DEFAULT '000000000000',
`phone_ip` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`purchase_price` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`purchase_date` date NOT NULL DEFAULT '0000-00-00',
`purchase_from` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`invoice_number` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
PRIMARY KEY (`asset_id`)
) ENGINE=MyISAM AUTO_INCREMENT=46 DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;

#
# TABLE structure FOR TABLE 'phoneline'
#

# DROP TABLE IF EXISTS phoneline;
CREATE TABLE `phoneline` (
`line_id` int(11) NOT NULL AUTO_INCREMENT,
`phone_number` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
PRIMARY KEY (`line_id`)
) ENGINE=MyISAM AUTO_INCREMENT=3 DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;

#
# TABLE structure FOR TABLE 'server'
#

# DROP TABLE IF EXISTS server;
CREATE TABLE `server` (
`server_id` int(11) NOT NULL AUTO_INCREMENT,
`site_id` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`server_ip` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`server_hostname` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
PRIMARY KEY (`server_id`)
) ENGINE=MyISAM AUTO_INCREMENT=4 DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;

#
# TABLE structure FOR TABLE 'site'
#

# DROP TABLE IF EXISTS site;
CREATE TABLE `site` (
`site_id` int(11) NOT NULL AUTO_INCREMENT,
`site_name` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`street_number` int(11) NOT NULL DEFAULT '0',
`street_name` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`city` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`state` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
`country` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
PRIMARY KEY (`site_id`)
) ENGINE=MyISAM AUTO_INCREMENT=4 DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;

#
# TABLE structure FOR TABLE 'user'
#

# DROP TABLE IF EXISTS user;
CREATE TABLE `user` (
`user_id` int(11) NOT NULL AUTO_INCREMENT,
`samaccountname` varchar(100) collate latin1_general_ci NOT NULL DEFAULT '',
PRIMARY KEY (`user_id`)
) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;

Glintech integrates Asterisk, Jabber for open source UC platform

Geoff Jacobs — Fri, 03 Oct 2008 02:35:00 +0000

A week or so ago, my boss came to me asking if I could write something on what’d I’d done internally with XMPP and Asterisk for someone he knew at Computerworld. I was only too happy to have someone listen to my ramblings, so I wrote up some replies to some of the questions his friend had asked.
Last night my boss sent me a link to the article. Unfortunately, the article makes it look like he was the one who replied to the questions instead of me, but it’s nice to get some of my work out there anyway.
Here’s the full article: Glintech integrates Asterisk, Jabber for open source UC platform.
For those who actually understand what the article is about, you’ll probably realise that what I did here wasn’t anything particularly difficult or out of the ordinary. But hopefully for those who don’t, it might open a few eyes to some of the things that can be done with open source software.

Erratic Sendmail problems…

Geoff Jacobs — Wed, 07 May 2008 01:33:00 +0000

I’ve recently installed Drupal 6, and was having problems sending out emails (specifically for new users and password resets).
The problem was that sometimes the mail was coming through, and other times it wasn’t (it didn’t even appear in our mail server logs).
After lots of scouting around, I noticed that in /var/log/maillog (on FC6), the relay kept on changing.
On our network, we have 3 domain controllers, one of which is a mail server. Send mail was using it’s “Smart” relay to figure out where to relay the mail through, but unfortunately it kept finding whichever domain controller replied first, rather than just the mail server. This meant that sometimes, when it got the mail server, the email would come through, and other times it wouldn’t.
To fix the problem, I had to edit the “Smart” relay host in:

/etc/mail/sendmail.cf

I searched for “DS” and came across a section such as:

# "Smart" relay host (may be null)
DS

I changed this to read

# "Smart" relay host (may be null)
DSmail.domain.com

where mail.domain.com is the name of the mail server.
Then I restarted the sendmail service using:

service sendmail restart

and everything started working!

Asterisk Bootcamp

Geoff Jacobs — Tue, 30 Oct 2007 05:55:00 +0000

Just a quick post to mention that I’m heading to Melbourne next month for the Asterisk Bootcamp (care of work). Should be a good opportunity to learn a lot of info about Asterisk and VoIP in general.