I’m playing with OpenStack and decided to bring up a testing environment on my home Debian computer.

I’m using KVM virtualization, launching VMs as non-root user and hit an issue not described in official documentation.

Just read an interesting Doug Ireton’s blog post about Chef patterns and antipatterns.

Sometimes it’s needed to assign some proxy header depending on some variable value. But proxy_set_header does not work with “if” cause (at least didn’t work with nginx 1.4.1). So the following construction won’t work:

We use SyslogLogger gem in order to forward rails application log to system log.

in rails Gemfile:

group :production do
  gem "SyslogLogger", "~> 2.0", :require => 'syslog/logger'
end

in config/environments/production.rb

config.logger = Syslog::Logger.new "rails_application_name" 

The problem was that logs actually were forwarded to syslog, messages and user.log and sent to remote server and written to syslog, messages and user.log there. I was asked to make things DRY(ier).

Several days ago I decided to clean up drawers in my desk at home and, of course, found several artifacts: old Univercity notes, Parker pen I was presented by my sister several years ago and some ATmega8A AVR microcontrollers.

I had several vacation days and caught a cold. So I couldn’t help but installed Atmel Studio and CodeVisionAVR to play with LEDs a bit.