hannacabana:

This looks nice for #baremetal

Originally posted on Kyo Lee:

Nuclear-Devil-Horns

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.

euca_new_logo

ec2_logocobbler_logo

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

Originally posted on 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:

lb1  192.168.20.11
lb2  192.168.20.12
web1  192.168.20.21
web2  192.168.20.22

Configure on both lb1/lb2

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

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Originally posted on 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:

http://packages.vmware.com/tools/docs/engineering-release-notes/rhel-upgrade

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 
IPV6_AUTOCONF=no
IPV6_AUTOTUNNEL=no

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

IPV6INIT=yes
IPV6ADDR=(your assigned IPv6 address)
IPV6ADDR_SECONDARIES=””
IPV6_DEFAULTGW=(IPv6 default gateway)

9 Years

The Windy City

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

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