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Friday, March 18, 2016

Export instance from OpenStack with Ceph/rbd backend

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Suppose that you want to migrate an instance from different infrastructures or you want to hand over an instance information to a client, so...
Saturday, March 12, 2016

Testing juju environment inside LXC container

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I think we pass the part about what juju is and how it works, so I'll post direct commands and configurations of how to get the environm...
Thursday, March 10, 2016

Cinder Volume Transfer

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Let's assume you want to change ownership of volume from Tenant_A to Tenant_B. Step 1: Tenant A will initiate an Ownership Transfer whic...
Thursday, March 12, 2015

The real problem behind highly transactional applications

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An architecture trying to respond to at least 10000 concurrent connections per second, is trying to solve the C10K problem, even if this is ...
Wednesday, October 15, 2014

Why companies should embrace OSS and the DevOps movement

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It’s not a secret that the best and most competitive technologies today exist in the world are based on some Open Source component, maybe th...
Monday, October 8, 2012

Free EL YUM Repositories

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If you are using some flavor of Enterprise Linux, eventually will get tired of downloading rpm packages from  Here  BTW, this is a really gr...
Tuesday, April 24, 2012

SSH login without password

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Suppose you want to use Linux and OpenSSH to automize your tasks or you just don't want to type the password every time you connect to a...