99,9 % uptime

Two of Your Nines Don’t Need Five Nines

There's a pretty good chance that you have a number of environments that are tagged as having a five nines requirement for availability That don't actually need it. We often find ourselves getting confused with availability and the true cost of keeping application environments up on the ever elusive 99.999% uptime. Breaking Down the Nines It is eye opening when we break down the actual downtime allowed in the sense of minutes per year when we look at the level of nines: 99.999 - 5.26 minutes 99.99 - 52.56 minutes 99.9 - 525.6 minutes (5 hours 46 minutes) 99 - 5256 minutes (87 hours 36

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Suspending and Restarting the OpenStack Cookbook Lab

In our previous post about Installing the OpenStack Cookbook on OSX, we explored the simple first steps needed to get our OpenStack lab environment up and running on OSX. This is OSX specific, but quite similar to the lab being run on Windows and Linux. I will put together a quick post to show how to do the same on Windows and Linux also. Because we want to manage our resources by bringing the systems down and up on occasion, it is important that we know how to quiesce the lab instances, and

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Installing the OpenStack Cookbook on OSX

As an advocate for OpenStack, I am always keen to help give newcomers to the open cloud ecosystem a chance to have a positive learning experience. A great tool for that is the OpenStack Cookbook lab. I've been lucky enough to have helped a little along the way as a reviewer for the 2nd edition of the book, and to have done some small code contributions as well. Luckily, it doesn't take much to run the OpenStack Cookbook lab, and most importantly, it is free! You will need to have the

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November 2015 London/UK VMUG Recap

Having just finished up a trans-Atlantic trip, I am reminded again about how important the community is. The theme of the VMUG may be changing as we watch the progression in technology, but the core importance has not changed, and if anything, has strengthened. Meeting of the Mentors A few folks in the community stand out personally for me from the experiences that I've had. It wasn't that long ago that we were lucky enough to have Mike Laverick come to speak at the Toronto VMUG on the

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Cleaning up Exited Docker Containers with Help from Awk and Grep

As we start to mess around more with Docker, one of the things that I have to do regularly is to purge out the containers that are exited and unused. I'll put the disclaimer here that this is a way to remove ALL exited containers. In other words, any container that isn't running in detached mode will be destroyed. This is very handy for development systems where you test out lots of containers Pattern Matching the Awk-ward Way I won't dive into the goodness of awk, but I do recommend that you

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Musical Fun with Disturbed and a 7-String

Because all work and no play makes Jack, or in this case Eric, a dull boy, I decided to try out a quick experiment.  I've used a combination of some ear training, and Camtasia to make this a fun project. I'm a fan of somewhat heavier music, and Disturbed recently came out with a new album.  I decided to learn the song The Light from the new album Immortalized.  This was a chance to muck around with some video editing fun to see how I could produce the video with a few elements. The

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Don’t Throw out that Spinning Disk Purchase Order Yet

Wait, what? Isn't Flash the only future? Isn't cloud-native the only way to develop applications? Isn't [future of IT product] the only real solution? It's time for a quick little health check on the IT ecosystem. Before we start, I have to admit that I do lean forward with regards to technology. The reason is that I've witnessed countless technologists and organizations alike get caught out as technology passed them by and they were left scrambling to catch up. As you'll see when we wrap

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Rancher Part 4:  Using the Catalog Example with GlusterFS

As promised, it's time to get to the catalog goodness. Since GlusterFS hasn't gotten enough love from me lately, it's time to bring that into the process as part of my Rancher demo. The goal with this exercise is to spin up a GlusterFS environment and to expand it using the built-in capabilities provided by the catalog. Deploying an Application from the Rancher Catalog Go to the Applications menu option and select Catalog from the secondary menu. That will bring you to the built-in application

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Rancher Part 3:  Adding the DockerHub to our Rancher Registry

So far in the series, we've covered installing your Rancher instance on Ubuntu, and attaching Rancher to the Docker host on Ubuntu. Next up we want to be able to stretch our wings a bit and add some other container images. Rather than downloading the images individually and having to then work from a local instance, Rancher allows us to connect to an external registry which can be the DockerHub, Quay.io, or a custom registry which could include private Docker hub instance. Adding Docker Hub

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Rancher Part 2:  Adding a Docker Host to Rancher

Now that we've gotten Rancher up and running from our first post, it's time to take the next steps and configure our first host. We are going to run Rancher pointing to the same host that we are running Rancher on. That may seem like some sort of Docker inception thing, and definitely not the recommended way to run in production, but it's a great way to test the waters on how it will work. Adding your First Custom Host in Rancher Using the Rancher UI, we can add hosts by clicking on the

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