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Will you be my best friend?

Friday, December 25, 2009

Yeah, it’s like that.

[via http://www.wakeapparel.com/images/BestFriend.jpg]

posted by johntash at 1:14 am  

Fake Photo Fiesta

Tuesday, December 15, 2009

This video really reminded me of that old “rope trick” video. Where the guys pretended to stretch a rope across a rode and cars would stop thinking they really had a rope.

posted by johntash at 6:10 am  

Don’t Talk to Robots PSA

Monday, December 14, 2009

This is a Public Service Announcement. Please, do not talk to the robots.

“Written and directed by Jake Maymudes Co-directed by Colin Gill and Produced by Peter Harding.”

If you like the original, check out what one of the youtube fans put together. The first “NO!” one is my favorite out of them.

And yes.. I know this is kind of old, but it’s still awesome.

PS: Kanchi’s a robot.

posted by johntash at 6:30 am  

Extreme Projector Gaming

Sunday, December 13, 2009

Today’s definition of awesome? Strapping a projector to your chest, a ps3 to your back, and playing your games anywhere. Yes, even in a windtunnel.

Check out this viral ad from Epson’s “Extreme Gamer

I’m curious how long the batteries last on that thing.. and whether he can get a few friends to carry around some wireless speakers for 5.1 surround sound!

[epson via g4tv]

posted by johntash at 12:35 pm  

Using Monit to keep your services online

Tuesday, December 1, 2009

Thesh17’s been running on a linode VPS for a month or so now.   It works great until it gets railed, and apache dies.     Then a few hours later I notice the site’s down and login to restart it.    Originally I wrote a shell script that would just check if httpd was running.  If it wasn’t, it’d start it.   It’d also check the output of ‘free -m’ and if memory usage(not counting buffers) was greater than 90%, restart apache.

You’d think that’d be good, right?  Wrong.   I don’t know why, but occasionally things would get confused.  It’d see httpd running, but it wasn’t serving any pages on port 80.    service httpd status would show it was stopped, but the script didn’t check http connectivity or the actual pid file. I honestly didn’t troubleshoot this much, and just manually killed the processes/restarted httpd.

I decided to search for some scripts similar to mine(and better), but instead ended up landing on a utility called Monit.   It’s basically a service monitor you can run(locally or remotely) and depending on different conditions, it will restart the service and make sure it’s running.     This can be as simple as the pid in the pid file not existing, or more complex like the process has been using 90% of the cpu for the last 30 minutes.

As an example, here’s what my apache monit config looks like right now:

check process httpd with pidfile /var/run/httpd.pid
group apache
start program = "/sbin/service httpd start"
stop program = "/sbin/service httpd stop;pkill -9 httpd"
if failed host port 80 protocol http then restart
if cpu is greater than 60% for 2 cycles then alert
if cpu > 80% for 5 cycles then restart
if children > 150 then restart
if loadavg(5min) greater than 10 for 8 cycles then alert
if memory > 90% for 2 cycles then restart
if 5 restarts within 5 cycles then timeout

Monit is pretty simple to install. It’s available in most distro’s repositories. On centos:

root@server:# yum install monit

On Gentoo:

root@server:# echo "=app-admin/monit-5.0.3" >> /etc/portage/package.keywords;
root@server:# emerge -av monit

I’m going to give Monit a try for a few weeks and see how it works out. I’ve been using nagios lately as well, but it seems kind of cumbersome to me and mainly one used for monitoring/reporting. Monit will actually restart a service if it detects a problem which *usually* is a good thing.

posted by johntash at 4:25 pm  

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