My introduction to Docker

With my (still-relatively) new job comes an introduction to new (to me) technology. In this case, the technology in question is Docker.

For those of you unfamiliar with Docker (like me), it is, in a nutshell, a tool for deploying and running an application within a container. It is an improvement over VM (virtual machine) in that it runs at the operating system, rather than the hardware, level, resulting in less overhead and a more efficient environment.

As part of my indoctrination into Docker, I looked up some resources to help me get started.  I found this entry that seems to be very helpful.  I’m sure I’ll find some others as well.  I’ll post them as I go along.  I also installed Docker on my work laptop and have been playing with it.  At the moment, I am far from an expert on Docker (in fact, I’m not even close), but I feel like I’m starting to get the hang of how it works.  Hopefully, I’ll be productive with it before long.

I also noticed that, in the schedule for our upcoming SQL Saturday, one of the sessions focuses on Docker.  I intend to attend that session.  At this point, any resource that helps me to learn this technology is definitely of interest.

Does anyone else have any suggested resources for helping me (and others) learn Docker?  Feel free to comment below!

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Scary Deployments

My friend Steve Jones ‘blogged this, and this spoke to me enough that I thought it was worth a re-blog.

Voice of the DBA

I was listening to a web developer talk about some fundamental changes in a web platform. In this case, an older system was being replaced completely with a new one, and as one of the reasons, the developer showed some typos that had existed on the old site for years and hadn’t been fixed. The reason? This quote:

“Very few people understand how the entire system works that are still in the building … The thought of deploying [changes] brought people to tears.”

That can’t happen. Ever. We can’t be afraid to touch systems. When this happens we get paralyzed, and we don’t do good work. Or we’re not a good fit for a project. Or perhaps, we’ve got a bad attitude.

I’ve worked in a few companies where developers were afraid to touch a system. It’s amazing how quickly this attitude becomes contagious, even scaring management from considering change…

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