Docker for Mac Tips for Troubleshooting Container Problems

I’ve used Docker for Mac since the Beta release opened to wider audiences. With the rapid prototyping I’m doing on Hadoop environments, I’m finding it great for providing quick environments to test out theories. Problem: How do you access the Docker for Mac VM? The problem with a black box is not being able to easily get inside […]

A followup on the strange stunnel behavior in docker

This is a quick followup to the strange stunnel behavior I was seeing that I wrote about previously. After discussing the issue with a colleague, we came up with two different solutions to this problem with stunnel writing to /dev/console inside a docker container. Indirect route with docker exec In his method, we invoke the container and […]

Strange stunnel debug logging behavior in docker

I’ve been playing with xenserver lately to quickly model small Hadoop clusters. One of the frustrating things about xenserver is the lack of good graphical user interfaces that provide for a minimal amount of automation. This means I’m frequently dropping to the command line on the xenserver master and running the xe tools by hand […]

Creating RPMS with fpm and docker

Now and again, you need to create RPMS of third-party tools, such as Python libraries or Ruby gems.  The most effective (and best!) way to do this is with fpm. Historically, I have built RPMS using a few dedicated virtual machines for CentOS5 and CentOS6-specific builds. These virtual machines have gotten crufty with all the various libraries installed. Wouldn’t it be nice to have […]