PC Case Fan Effectiveness Analysis

A side effect of setting up your own VMWare lab is that, after all is said and done, you end up with a little furnace in a closet.  With Orlando weather, this is mostly unnecessary.

Having recently setup the ELK stack to monitor this VM, I searched for the string ‘temperature’ not knowing what I would find.

Steady Stream Of Temperature Warnings

Bingo, the image above clearly shows temperature warnings from the three hard drives in VM.

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Crouton Arduino USB To Serial Driver Success

I recently bought a cheap Arduino Board on eBay that came with a CH34x USB to Serial Chip. The eBay seller offered a link and instructions for the drivers for Linux, Mac and Windows. Installing/loading this in Crouton was not straightforward however.

Connecting the board and opening ide shows the lack of connection as expected.  Note the grayed-out ‘Port’ Selector.

Screenshot 2015-05-30 at 7.33.08 AM

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Kibana4 Custom Color Palettes

Cool and quick dabble on Kibana4 for custom color palettes.  Since Kibana4 is the blaze of the future and old Kibana is not coming back, its worth our time spending time getting to know this latest version.
Here is neat ‘temp graph’ using a custom color palette and temperature data from drives in pc.
And here is the original for reference.

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Monitoring VMWare ESXi with the ELK Stack

Monitor anything; this is what fills your head after playing with Elasticsearch, Logstash and Kibana.

ELK Stack, meet VMWare Server.  Since VMWare’s ESXi runs on some Linux kernel, it shares the logging facilities we’re familiar with on Linux systems.  Going about forwarding syslog messages to a remote box is a bit different thou.  Luckily, VMWare’s Knowledge Base is very thorough if you know where to look.

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Happy Elasticsearch

So last night I found this on my lab machine…


Silly node ran out of space.  Spawning up extra node promptly made this a non-issue.


Crisis averted. 

It is so nice to work with open source tools built to handle failure gracefully.  A few years ago the above scenario would have prompted a weekend-at-the-colo to the dismay of family and my sanity.  These are interesting times!