Berlin CloudNativeCon + KubeCon 2017

Date: 2017-04-04

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Author: Erno Erdelyi

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Last week my colleagues and I had the opportunity to attend the 2017 CloudNativeCon + KubeCon in Berlin. The journey was quite enlightening. Although we listened to several talks about the future of Cloud Native technologies, for me, the most interesting part was that the present of Kubernetes already looks quite bright. From the numerous talks, I wanted to share the two case studies that I think represents this the most.

One of the case studies presented the now-infamous shut-down of Amazon’s S3 server. The shutdown affected countless services that rely on its advertised high availability. The speaker, with some satisfaction, announced, that due to the automated management capabilities of Kubernetes, companies that used the fledgling open-source service remained available through the incident. They simply watched Kubernetes switch hosts while the rest of the internet was melting down in panic.

Another case study of interest was that of Magazine Luiza, a Brazilian retail company, that recently adopted Kubernetes. This adoption was particularly useful during Black Friday, when traffic to online stores increases exponentially. The company has a history of shaving off more and more downtime during the traffic rush on Black Friday. However, in previous years they were unable to produce 100% availability, which is crucial, as on Black Friday every second of downtime means significant revenue losses. In the preparation to the 2016 event, they decided to give Kubernetes a try. While deploying the apps they even developed an open source deployment tool. Mr Pereira, the representative of Luiza Labs, speaking at the event, proudly announced that in 2016 Black Friday went smoothly, without any interruptions in service.

As these case studies show, Kubernetes as a technology, although still in its early stages, is already making strides in transforming the limits of highly available services. It exceeds the human restrictions that prevented swift reactions to spikes in traffic or unexpected resource-outages. The automated deployment and scaling it provides seems to have significant potential, and we have seen already what it can do.

Erno Erdelyi is the CEO of Component Soft. His most important skill is staying on top of changing technology landscapes, selecting technologies that have staying power.

The OpenStack COA Exam: 10 tips for better chances

Date: 2017-01-05

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Author: Hetzner

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Near the end of last year OpenStack.org asked us to provide practical tips about taking the Certified OpenStack Administrator exam, for their article collecting the tips of various training centers. In this post we attempt to expand on our advice shown in the OpenStack.org article.

1. Study thoroughly the OpenStack COA Requirements

They are quite well documented. Familiarizing yourself with the requirements helps you prepare more efficiently for the exam.

2. Be sure to have a fast and reliable internet connection for the exam

as not only Linux commands but also the Horizon GUI and you web cam and the background monitoring of your machine use valuable bandwidth as well.

3. You need an empty room for the exam with you as the only person in it.

The proctor will check it before you start the exam.

4. Allow yourself enough time for hands-on exercises with all the OpenStack topics in the OpenStack COA Requirements.

Participants of our OST-104: Openstack Admin. and COA exam prep. training can do these exercises not only during the course but will also receive one week extra remote lab access after the training by request.

5. You should know both the OpenStack commands and the Horizon admin tool to achieve good results.

Knowing the command line is practically a must.

6. Be prepared that you can only use the US English keyboard layout during the exam!

As Component Soft has course participants from all over the world, we have heard from some of our participants that using the US keyboard layout was jarring and unusual which slowed them down. If you use another layout, make sure you practice using the US one before the course.

7. The Linux screen command is very useful to split your single command terminal during the exam.

This way you can improve your productivity, especially in more complicated exercises.

8. You can only set Swift advanced ACL settings in the command line, not in Horizon.

9. Be careful to use the proper user, project and domain names given in each exercise!

10. Participate in a preparatory course

As referenced above, we offer a comprehensive course aimed at equipping you with the knowledge necessary for an OpenStack administrator as well as preparing you for the COA exam, complete with Lab exercises and more, in-depth advice.

For a More deatailed look at some of these tips, and a dive into the Cinder part of the exam, check out my tutorial video below:

Csaba Patyi is an IT Consultant and Instructor at Componentsoft Ltd. In this position he provides Level 3 support to one of the major Hungarian Telco companies. He regularly holds courses about OpenStack Administration, Linux Administration, Docker essentials and many more in Hungary and in other countries as well.
He has an OpenStack Administrator certification from Mirantis (MCA200) and from the OpenStack Foundation (COA) plus a Linux Administartor certification from the Linux Foundation (LFCS)

Other resources

Technology Evangelist’s useful tips on passing the COA exam