This looks nice for #baremetal

Kyo Lee


What is Metaleuca?

Metaleuca is a bare-metal provision management system that interacts with open-source software Cobbler via EC2-like CLI.

Using Metaleuca, users can communicate with Cobbler to self-provision a group of bare-metal machines to boot up with new, fresh OS images. The main appeal of Metaleuca is that it allows users to manage the bare-metal machines like EC2’s virtual instances via the command-lines that feel much like ec2-tools, or euca2ools.



Metaleuca Command-Line Tools

Metaleuca consists of a set of command-lines that mirror some of the command-lines in ec2-tool or euca2ools. The list below shows a number of the core command-lines used in Metaleuca:

  • metaleuca-describe-profiles – Describe all the profiles provided in Cobbler
  • metaleuca-describe-systems – Describe all the bare-metal systems registered in Cobbler
  • metaleuca-reboot-system – Reboot the selected bare-metal system
  • metaleuca-run-instances – Initiate the provision sequence on the selected bare-metal systems
  • metaleuca-describe-instances – Describe the statuses of the provisioned…

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This looks interesting for bare metal provisioning

Aaron Walrath - Another IT Guy's Meanderings

HAProxy is an open source load balancer/reverse proxy that can provide high availability for your network services. While generally used for web services, it can also be used to provide more reliability for services such as SMTP and terminal services. In addition we can combine it with the Keepalived package to allow high availability/failover for the HAProxy server itself. HAProxy plus Keepalived can provide a good solution for high availability at a very low cost in comparison to proprietary hardware based load balancers.

In this example I will configure 2 HAProxy/Keepalived servers (lb1/lb2) that will direct traffic to 2 Apache web servers (web1/web2). I will not detail the set up of the web servers. Here is a list of the server and IP address configuration scheme:


Configure on both lb1/lb2

First we need to activate the Extra Packages for Enterprise Linux (EPEL)…

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Aaron Walrath - Another IT Guy's Meanderings

In a previous post I discussed installing the open source VMware tools for Red Hat Enterprise/Scientific/CentOS Linux 6 from a yum package repository provided by VMware. This is in contrast to using the version distributed directly with VMware ESX/ESXi, which with the Linux platform was not provided in an RPM package format. With the upgrade to ESXi 5 the update process for the tools installed from the repository is not very seamless because of some update issues in addition to package changes.

First off, to get the VMware tools packages updated it is important to upgrade to the latest version of Red Hat/Scientific/CentOS Linux 6 due to some issues with the yum version distributed originally with 6.0. VMware has disabled the automatic update due to this issue:

I am using Scientific Linux 6, for Red Hat and CentOS the upgrade process should be similar but most likely will have…

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Adding an IPv6 address to an existing IPv4 interface

Adding an IPv6 address to an existing IPv4 interface

Add the following to /etc/sysconfig/network  : 

NETWORKING_IPV6=yes                     # Enables global IPv6 initialization
IPV6_DEFAULTGW=(your ipv6 gateway in Hex) # Default gateway 

Then add the following to /etc/sysconfig/network-scripts/ifcfg-eth0 (or whatever interface)

IPV6ADDR=(your assigned IPv6 address)
IPV6_DEFAULTGW=(IPv6 default gateway)

9 Years

The Windy City

Chicago... by zakattak
Chicago…, a photo by zakattak on Flickr.

The kind of limo you take to Marshall’s

Pretty in pink by zakattak
Pretty in pink, a photo by zakattak on Flickr.

AirBNB and locks

Why isn’t there a way for AirBNB to work either with NFC or some SMS / bluetooth enabled ‘smart lock’ so that you don’t have to physically meet up with the owner to get keys?

Especially when so many buildings these days charge thousands of dollars to re-key the building in case of loss of the exterior door key – and have an external buzzer / dialer. Wouldn’t it be easier to setup your entry to point to your google voice number, and when you have guests, forward it to Twilio which would then either buzz the person in, or not, based on an API  call to AirBNB’s backend?

For the interior door key, something like this would be good:



This could also integrate with the app.


Imagine, also, having a hotel keycard like a Zipcar keycard.

That would work in any Marriott or even all Starwood Preferred Guest properties, and that based on my smartphone booking, would be allowed to enter the room that I booked. Skip the checkin counter, and just proceed directly to my room.



Ideas for EMS response systems / public service

What if there was an Uber for tow trucks? Would AAA or CHP or Caltrans or other municipalities pay for this type of thing to shorten response time? I got this idea after watching the National Geographic series ‘Hell on the Highway’ in which they will make a radio call for a specific company, and if that company doesn’t show up at the crash scene within 30 minutes, they give up the call. Sort of like Domino’s Pizza.