Re: Age old question: FBSD vs Linux

> The only things that require a reboot in Debian are (a) hardware
> failures that can't be hotswapped and (b) kernel upgrades.
> Technically you can get around (b) with a trick called
> "three-kernel-monte" but it's not for production use, just for
> showing off.


Indeed. With 2 redundant servers, and kvm (or your virtualization poison 
of choice) you can have near 100% uptime of your applications. In all 
likelyhood 1 server would be sufficient. Obviously your server should 
have RAID(1/5/10 whatever your app requires,) and 2 hot swap power 
supplies.

The key thing with 2 servers, is that on occasion back planes fail. I've 
seen it a few times on dell gear.



> 
> The administration tools and packaging in Debian are amazingly
> good.

Yes. They are. It has a very professional polish throughout that makes 
it very pleasant to use.

Centos is a very popular distro as well, but I find it requiring many 
workarounds and tweaking that Debian doesn't.

Setup a VM of each.

I strongly recommend Debian for the host operating system. I really like 
KVM, as it's quite simple to setup and provision virtual machines.

I use a simple script:

#!/bin/bash
#A script to fire up KVM virtual machines on the elmonte server

image_name="Freeswitch-demo-development"
disk_image="freeswitch-dev.img"
cdrom_image="../isos/ubuntu-server-x86_64.iso"
boot_select="c"
kvm_opts="-daemonize -nographic"


kvm \
         -hda $disk_image \
         -cdrom $cdrom_image \
         -boot $boot_select \
         -name $image_name \
         -net nic,model=rtl8139,macaddr=52:54:00:12:34:08 -net tap \
         $kvm_opts
reset


You can use qemu-img to create a disk image. Make sure to set your MAC 
address per instance.

You'll also need to setup a bridge. Here is my /etc/network/interfaces 
file:

auto eth1
iface eth1 inet manual

auto br0
iface br0 inet static
         address 10.10.4.109
         network 10.10.4.0
         netmask 255.255.255.0
         broadcast 10.10.4.255
         gateway 10.10.4.1
         bridge_ports eth1
         bridge_fd 9
         bridge_hello 2
         bridge_maxage 12
         bridge_stp off


-- 
Eat sushi frequently. - Avi
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