Category Archive: Computers

Nov 14

Free Cloud Resources

This is a quick list of “free” cloud resources. Mirantis Openstack Express (Developer) Rackspace Developer + Google Cloud Platform Trial Openshift Free Elephant Postgres (free) Redis Cloud ClearDB (mysql) Stackato Cluster (up to 20GB)

Sep 16

Docker Volumes Quirk

When specifying volume paths in a Docker run command, extra slashes can cause things not to work properly.

Jul 27

Using Openstack/Devstack Floating IPs from outside

I hope that this is of use to someone. After many hours of tearing down, building up, programming routers, etc., I’ve figured out why my devstack wasn’t allowing access from floating ips. I knew that the address was resolving (arp -a); I just couldn’t ssh to it (or do anything else with it) It was …

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Jun 22

cygwin and torquebox and rvm, oh my!

rvm, despite being wonderful, doesn’t play very well with torquebox under cygwin. In particular, the gem paths are not working. So, in order to fix this, simply do: rvm use system And then it will work right. Once you’re done with the torquebox work, you can go back to using rvm.

Aug 04

rsh hates nohup

rsh has issues with nohup. Yes, I know rsh is evil. It wasn’t my decision.

Jun 09

Torquebox and Cygwin: Take I

Torquebox and Cygwin don’t work as nicely together as one might hope. That said, here are a couple of findings: In order to deploy, you need to set the $JBOSS_HOME with the Windows path.  You can do this via export JBOSS_PATH=cygpath -w PATH_TO_JBOSS. Additionally, the JRUBY_HOME needs to be a windows path as well.   Otherwise …

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Mar 02

Rails & JRuby in a Jar

This is a discussion of what I needed to do to put rails and JRuby together in a single jar.

Sep 01

Fractal Terrain Generation

Our map

I’ve been working on a wargaming library/framework off and on for over a year; along the way I’ve encountered a number of interesting problems to solve. This blog entry details one of them, fractal terrain generation.

Aug 25

Using jnp as a JBoss heartbeat

jnp is a JBoss protocol which exposes jndi.  It is, by default, bound to port 1099.  I’d been using that port as a heartbeat, but “cheating” — I would open a socket and then close it immediately.  However, this caused problems.  jnp is chatty.  And it got upset at my not letting it say ‘hi’ …

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Jul 29

JBoss port confusion

Sometimes, JBoss reports that it is unable to bind to a port, saying it is already in use. However, this is not always the case.

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