UCARP: не допустить, чтобы первоначальный мастер захватил VIP, когда он возвращается после сбоя?

Keepalived можно сделать это, объединив nopreempt вариант и BACKUP состояние на обоих узлах:

• Предотвратить превращение Мастера VRRP в Мастера после его сбоя
• Запретить мастеру вернуться к мастеру после неудачи

Как насчет UCARP?

Name       : ucarp
Arch       : x86_64
Version    : 1.5.2
Release    : 1.el5.rf
Size       : 81 k
Repo       : installed
Summary    : Common Address Redundancy Protocol (CARP) for Unix
URL        : http://www.ucarp.org/
License    : BSD
Description: UCARP allows a couple of hosts to share common virtual IP addresses in order
           : to provide automatic failover. It is a portable userland implementation of the
           : secure and patent-free Common Address Redundancy Protocol (CARP, OpenBSD's
           : alternative to the patents-bloated VRRP).
           : Strong points of the CARP protocol are: very low overhead, cryptographically
           : signed messages, interoperability between different operating systems and no
           : need for any dedicated extra network link between redundant hosts.

Если я не использую --preempt вариант и установите --advskew с одинаковым значением оба узла становятся главными.

/etc/sysconfig/carp/vip-010.conf

# Virtual IP configuration file for UCARP
# The number (from 001 to 255) in the name of the file is the identifier
# $Id: vip-001.conf.example 1527 2004-07-09 15:23:54Z dude $

# Set the same password on all mamchines sharing the same virtual IP
PASSWORD="pa$$w0rd"

# You are required to have an IPADDR= line in the configuration file for
# this interface (so no DHCP allowed)
BIND_INTERFACE="eth0"

# Do *NOT* use a main interface for the virtual IP, use an ethX:Y alias
# with the corresponding /etc/sysconfig/network-scripts/ifcfg-ethX:Y file
# already configured and ith ONBOOT=no
VIP_INTERFACE="eth0:0"

# If you have extra options to add, see "ucarp --help" output
# (the lower the "-k <val>" the higher priority and "-P" to become master ASAP)
OPTIONS="-z -k 255"

/etc/sysconfig/network-scripts/ifcfg-eth0:0

DEVICE=eth0:0
ONBOOT=no
BOOTPROTO=
IPADDR=192.168.6.8
NETMASK=255.255.255.0
USERCTL=yes
IPV6INIT=no

узел 1:

eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether c6:9b:8e:af:a7:69 brd ff:ff:ff:ff:ff:ff
    inet 192.168.6.192/24 brd 192.168.6.255 scope global eth0
    inet 192.168.6.8/24 brd 192.168.6.255 scope global secondary eth0:0
    inet6 fe80::c49b:8eff:feaf:a769/64 scope link 
       valid_lft forever preferred_lft forever

узел 2:

eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:30:48:f7:0f:81 brd ff:ff:ff:ff:ff:ff
    inet 192.168.6.38/24 brd 192.168.6.255 scope global eth1
    inet 192.168.6.8/24 brd 192.168.6.255 scope global secondary eth1:0
    inet6 fe80::230:48ff:fef7:f81/64 scope link 
       valid_lft forever preferred_lft forever