Author Archives: Divyashree - The GNULINUX Guy

About Divyashree - The GNULINUX Guy

I am a Linux and Opensource enthusiast. I started working on Linux early in 2007 while I was doing my Masters in Computer Science and passed out in 2010. Currently working as a DevOps Developer in in Public/Private cloud domain. my @github : https://github.com/kumarprd my @nagiosexchange : https://exchange.nagios.org/directory/Owner/divyaimca/1 my @linkedin : https://www.linkedin.com/in/priyadarshee-kumar-☁-a9415615

SNMP Poller tool to monitor any thing on network

Few years ago, I had created one SNMP Poller tool using perl and snmp utilites that can poll OID informations from any network devices, which is kind of passive monitoring mechanism. Thought to make it Opensource under GNU GPL. The … Continue reading

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My MongoDB cheatsheet

Few years ago, I was working on one mongoDB project.Its a NoSQL database , easy to learn and its pure JSON based. I learned it myself and had created a cheatsheet for it, so I can easily recall it anytime … Continue reading

Posted in ARTICLES, Concepts, Database, NoSQL, TIPS & T RICS | Tagged , , | Leave a comment

chef attribute : avoiding “undefined method `[]’ for nil:NilClass” error

In chef, when a nested attribute that might not exist/or not crated yet, you can use rescue as a modifier to an if statement. For example, assuming that only some of your nodes have node[‘install_wls’][‘isManaged’]defined: if node[‘install_wls’][‘isManaged’] do the stuff … Continue reading

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chef knife tricks: Add a node in an environment

  Sometime during automation of a large deployment process, we have to bootstrap a node , create environment and add the node in that particular environment on the fly.   Bootstraping : 2. Create environment dynamically from inside the programme:(python … Continue reading

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Linux performance Monitoring Tools

There are a lot of tools used for monitoring the performance in Linux. Here is the list of tools in one image that covers what is monitored by what.  

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Nagios Plugin Developed@NagiosExchange

Long ago, while working in one of the previous organization, there were lots of components like services and servers running in production environment. I had deployed all products one by one from scratch and the count kept on increasing. There … Continue reading

Posted in ARTICLES, Container, DevOps, FOSS, Monitoring, Operations, Programming, Virtualization | Tagged , , , , | Leave a comment

Chef Recipe: Oracle DB 11gR2 EE silent deploy

Chef provides a lot of flexibility and greater choice for infrastructure automation and I prefer it over others. We should design our recipe in such a way that the our recipes without being modified can be used in any environment … Continue reading

Posted in ARTICLES, DevOps, HOWTO, Operations, Private Cloud, Programming, Public Cloud, TUTORIALS | Tagged , , , | Leave a comment