sábado, junio 06, 2009

Virtualización con VMware ESXi

                                                               VMware_ESX_host

Esta es una tecnología que ya tiene muchos años, de hecho es una  tecnología que ya se utilizaba en sistemas Mainframe.  Desde hace un tiempo que utilizo productos de VMWare, realmente tienen una suite de soluciones que podría decirse abarca todos los tipos de necesidades, desde el VMWare player (gratuito), que permite cargar maquinas virtuales, hasta productos que permiten el manejo de datacenters para la administración de servidores virtualizados.

En esta ocasión me toco trabajar con VMWare ESXi, este es un producto que me pareció muy interesante, primero porque se puede utilizar libre de cargo (puede licenciarse para obtener soporte), y porque además utiliza un hypervisor que corre sobre utilizando una muy baja cantidad de recursos (32 Mb de RAM y aproximadamente 1 GB de espacio de disco).

La instalación la probé en un DELL PowerEdge 1950 y un 2900, además también pude hacer una instalación en un Pendrive y correrlo desde mi notebook Thinkpad T61P ( Lo cual es interesante para poder mostrar productos que pueden estar instalados en un servidor de storage externo al cual se se puede acceder mediante la red desde el producto)

Para resumir un poco, enumero algunas de las ventajas mas interesantes de este producto

  • No requiere un sistema operativo para el HOST, el hypervisor corre sobre un SO *NIX que tiene un consumo de recursos súper reducido
  • Las maquinas virtuales corren prácticamente sobre el hardware
  • Se puede particionar el servidor y asignar recursos según las necesidades que se tengan, se puede asignar procesadores, memoria, etc…
  • Posibilidades de administración centralizada utilizando herramientas de VMWare para manejo data centers
  • El producto se puede usar gratis (aunque si se quiere soporte debe licenciarse)
  • Versiones para 32bits y 64bits (la ultima versión es solo para 64bits)
  • Importación y exportación en formato OVF, con este formato pude lograr pasar una VM que pesaba 79Gb a 15Gb                         

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