Using wait conditions with Heat
This post accompanies my article on the Docker plugin for Heat.
In order for
WaitCondition resources to operate correctly in Heat, you
will need to make sure that that you have:
- Created the necessary Heat domain and administrative user in Keystone,
- Configured appropriate values in
nova-docker and environment variables
nova-docker driver lets Nova, the OpenStack Compute service,
spawn Docker containers instead of hypervisor-based servers. For
certain workloads, this leads to better resource utilization than you
would get with …
lvcache: a tool for managing LVM caches
Until recently I had a bcache based setup on my laptop, but when forced by circumstance to reinstall everything I spent some time looking for alternatives that were less disruptive to configure on an existing system.read more
Four ways to connect a docker container to a local network
This article discusses four ways to make a Docker container appear on a local network. These are not suggested as practical solutions, but are meant to illustrate some of the underlying network technology available in Linux.
If you were actually going to use one of these solutions as anything other …read more
gpio-watch: Run scripts in response to GPIO signals
For a small project I'm working on I needed to attach a few buttons to a Raspberry Pi and have some code execute in response to the button presses.
Normally I would reach for Python for a simple project like this, but constraints of the project made it necessary to implement something in C with minimal dependencies. I didn't want to write something that was tied closely to my project...read more