ucarp-mvip

ucarp-mvip is a helper package on top of ucarp to get multiple vips up under one interface with Debian's ucarp package. This is straight up grabbed from CentOS and hacked to work within Debian.

Why whould I use this?

You shouldn't, no guarantees here. But if you do, you're probably annoyed that there's no convenient way to do this in Debian. Seeing the CentOS way of doing the VIP's, I wanted it in my Debian too. As might you.

Building The Package

http://www.debian.org/doc/manuals/maint-guide/build.en.html

TLDR; dpkg-buildpackage -us -uc -b

Usage

First enable the ucarp-mvip from /etc/default/ucarp-mvip. Then configure your carp interfaces in /etc/network/interfaces as such:

  iface eth0:carp0 inet static
        address 192.168.1.110
        netmask 255.255.255.0

  iface eth0:carp1 inet static
        address 192.168.1.120
        netmask 255.255.255.0

Then copy vip example from /usr/doc/ucarp-mvip/examples/ to /etc/ucarp-mvip/ and configure them as you please.

Vip configs for your first server using the above /etc/network/interfaces example could look like:

• /etc/ucarp-mvip/vip-010.conf

PASSWORD="love"
BIND_INTERFACE="eth0"
VIP_INTERFACE="eth0:carp0"
OPTIONS="-k 1 -P -n"

• /etc/ucarp-mvip/vip-020.conf

PASSWORD="love"
BIND_INTERFACE="eth0"
VIP_INTERFACE="eth0:carp1"
OPTIONS="-k 100 -n"

And in the second server the vip configs would be:

• /etc/ucarp-mvip/vip-010.conf

PASSWORD="love"
BIND_INTERFACE="eth0"
VIP_INTERFACE="eth0:carp0"
OPTIONS="-k 100 -n"

• /etc/ucarp-mvip/vip-020.conf

PASSWORD="love"
BIND_INTERFACE="eth0"
VIP_INTERFACE="eth0:carp1"
OPTIONS="-k 1 -P -n"

Then restart the ucarp-mvip: /etc/init.d/ucarp-mvip restart.

You also might want to add additional post-up option to your interfaces. It's optional, so YMMV:

iface eth0 inet static
        address 192.168.1.111
        netmask 255.255.255.0
        gateway 192.168.1.1
        post-up /etc/init.d/ucarp-mvip start