Upgrade Cassandra cluster from 2.x to 3.x

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I started to remember why did I start blogging. The answer is “to collect my experience and share it publicly”. So, I’ll keep this going and now I want to remember how to upgrade the Cassandra cluster smoothly with no downtime.

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Nice mustache, sir! Jenkins 2.x tips and tricks

One year ago the first Jenkins 2.x release has changed the product paradigm dramatically. Now you don’t have to waste hours clicking UI buttons calling shell scripts from stage windows. Now you can do almost everything from a source code.

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Cheatsheet: Git

This cheatsheet is inspired by Git Book I’ve read a few days ago. Getting some useful stuff from other sources, I’ve built a list of commands which seem quite useful for my workflow.

Won’t chit-chat about version control importance and Git domination. You know it all. Just take a look what’s here.

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Configure OSSEC to send alerts from Gmail

Setting up any system analyzer, we want to always keep a track on all events happened in our machines. The best way to make that – email alerts. It means every time when application gets alert, it’s going to forward the copy of it to your email.

By default applications like OSSEC supports only local mail servers. But what if we just don’t have them? What if we use only tools like Gmail, Yahoo etc.? At that rate we could build mail relay listening on 25 port for applications work.

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Devopsdays Moscow: 6 мыслей

Предисловие


Это мой первый русскоязычный пост в блоге. Почему не на английском?

а) ценность данного поста на английском языке будет невысокой

б) очень хотелось бы сделать обобщение мероприятия для тех, кто на него не попал (нет, на Хабре его не будет)

в) попробовать изложить свои мысли как есть, без попыток перенять новые лексические обороты и прочих штук из иностранного языка.

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25 web-sources for Operations Engineering

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Information in the world of information! Text data in the world of data! Such subjects – the best friends for us and the best enemies at the same time. I recently surprised I hold so many articles and Linux guides about tools I still don’t use. Data juggling is going to be one of the most important qualities of contemporary human. Even more handy than stubbornness and work speed.

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