Apr 132014

Sometimes I feel a need to automate some meme generation. Luckily I found this incredibly helpful blogpost from jackmeme. http://www.jackmeme.com/blog.php?id=1

I used it as inspiration and did something similar in Perl. Of course the Imagemagick perl-magick reference was invaluable. http://www.imagemagick.org/script/perl-magick.php

The first thing I thought of with automated meme generation? The Weather! See my previous post about getting data from the Weather Underground API using Perl

This naturally lead to the forecast overlaid on the current radar.

Inspired by http://thefuckingweather.com/, I decided I want my daily forecast in meme form. The first weather-related meme I think of is Ollie Williams.


But that doesn’t really fit with the meme. Change fucking to motherfucking and Samuel L Jackson is PERFECT!


Smoosh those memes together and I’ve got my morning weather!


I found another source of amusement while playing with generating image macros. There is a Pyborg bot in one of the IRC channels I frequent. “She” says some pretty funny stuff, so we keep a quote list. Of course this is ripe for meme-ifying.


More Evequotes are available in the Imgur Album

Keep reading to see the secret sauce.
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Apr 132014

Weather data is pretty cool to play with. Especially when playing with home automation or just turning the current weather conditions into a meme.

For example:
Weather for Omaha, Nebraska on 4/13/2014 at 16:00

raging@virtualbox3:~/weather$ perl grabweather.pl
Forecast - Today:
weekday:        Sunday
high:   61
low:    27
precip: 100
cond:   Thunderstorm
month:  4
day:    13
hour:   22

Forecast - Tomorrow:
weekday:        Monday
high:   43
low:    25
precip: 10
cond:   Partly Cloudy
month:  4
day:    14
hour:   22

Forecast - Day After Tomorrow:
weekday:        Tuesday
high:   66
low:    37
precip: 0
cond:   Partly Cloudy
month:  4
day:    15
hour:   22

Current Conditions:
conditions:     Overcast
temp:   34
relative_humidity:      86
wind:   10.9
wind_gust:      0
pressure_trend: -
feelslike:      26
precip_1hr:     0

Radar Static Image:     /tmp/68127-radar.png
Animated Radar Image:   /tmp/68127-amimatedradar.gif

More info about Weather Underground’s API: www.wunderground.com/weather/api


Keep reading for my bit of Perl to grab it and make it usable.

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Mar 082014

Since I mostly deal with Windows computers, and partially because I couldn’t figure out why phantomjs on my debian netinstall rendered fonts to be UGLY, I figured I’d use one of the many windows computers to render and email the reports. I’m using my gmail account for testing this.



That looks pretty awesome, right? The secret sauce here is PhantomJS It pretty much a headless WebKit. A browser without a display. And it’s cross-platform!

I use PhantomJS to screenshot for PNG output and print to PDF. I then use ImageMagick to crop the PNG to a reasonable size. I use sendEmail to, well, send an email with the files attached.

Enough jibber-jabber.
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Feb 162014

Part 4 of 4 – Part 1Part 2Part 3

Now that you’ve got all your logs flying through logstash into elasticsearch, how to remove old records that are no longer doing anything but consuming space and ram for the index?

These are all functions of elasticsearch. Deleting is pretty easy, as is closing an index.

The awesome people working on elasticsearch already have the solution! It’s called curator.

I like the idea of being able to let a cron job kick off the cleanup so I don’t forget.

To install, we’ll have to instal pip.

sudo apt-get install python-pip

Then use pip to install elasticsearch-curator

pip install elasticsearch-curator

When making a cron job, I always use full paths

which curator

edit the crontab. Any user should have access so I’ll run this under my user.

crontab -e

Add the following line to run curator at 20 minutes past midnight (system time) and connect to the elasticsearch node on and delete all indexes older than 120 days and close all indexes older than 90 days.

20 0 * * * /usr/local/bin/curator --host -d 120 -c 90

If you prefer an alternative, here’s one written in perl.

Feb 162014

That’s quite a title. I work with an ONSSI Ocularis CS setup. Originally installed with NetDVMS, but upgraded to RC-C.

This post builds upon a couple earlier posts

What does all this mean? This heavily redacted screenshot should give some idea.
Number of overall motion events over time, same for failure events. Top list of cameras with motion events, top list of cameras with failure events.

You can see we’ve got a few failed cameras. Likely a power surge or network failure. Having this information will lower the time to repair, minimizing camera down time!
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Feb 162014

To make sure I understood how to find data using Kibana3, I started collecting input from IRC.


I have a ZNC bouncer set up on my network.


I have it set to Keep Buffer, Prepend Timestamps.
Timestamp Format:

[%Y-%m-%d %H:%M:%S]

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Feb 162014

I have been on a logging kick (or obsession) lately. See the previous series of posts.

I’ll start with a picture. This is seriously cool. If you’re running pfsense, you want this.

My home network is pretty boring. Network is Router is Logstash is installed on
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Feb 162014

Part 3 of 4 – Part 1Part 2Part 4
This is a continuation of http://www.ragingcomputer.com/2014/02/logstash-elasticsearch-kibana-for-windows-event-logs

Again, I took a lot of inspiration from http://sysxfit.com/blog/2013/07/18/logging-with-logstash-part-3/

The nxlog reference manual is surprisingly well written with excellent examples.

Loggly has some examples I found useful, even if I’m not using their service.

There are other options.
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Feb 162014

Part 2 of 4 – Part 1Part 3Part 4
This is a continuation from http://www.ragingcomputer.com/2014/02/logstash-elasticsearch-kibana-for-windows-event-logs

The great folks working on Kibana have been so awesome as to provide an example nginx configuration!

Kibana prompting for login to save changes to the dashboard

Before I start, I’ve got a tip of the hat to the resources that helped me figure this out


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Feb 162014

Part 1 of 4 – Part 2Part 3Part 4

Have you heard of Logstash / ElasticSearch / Kibana? I don’t wanna oversell it, but it’s AMAZING!

I’ll start with a screenshot. You know you want this. I have to blur a few things to keep some 53cr375 about my environment.

This is my configuration for collecting Windows event logs. I’m still working out the differences between the Windows XP, Server 2008R2, and Windows 7 computers I’m collecting logs from, but this has already proven very useful.

If you don’t know about it yet, you should really go watch this webinar. http://www.elasticsearch.org/webinars/introduction-to-logstash/ I’ll wait.
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