LVSによる負荷分散対策を取り入れたSOHOネットワークの構築方法（基礎編）

#
# Sample configuration file for ISC dhcpd for Debian
#
# Attention: If /etc/ltsp/dhcpd.conf exists, that will be used as
# configuration file instead of this file.
#
## The ddns-updates-style parameter controls whether or not the server will
# attempt to do a DNS update when a lease is confirmed. We default to the
# behavior of the version 2 packages (‘none’, since DHCP v2 didn’t
# have support for DDNS.)
ddns-update-style none;# option definitions common to all supported networks…
option domain-name “it-ishin.com”;
option domain-name-servers 192.168.1.1;default-lease-time 600;
max-lease-time 7200;# If this DHCP server is the official DHCP server for the local

# network, the authoritative directive should be uncommented.
#authoritative;# Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection).
log-facility local7;# No service will be given on this subnet, but declaring it helps the
# DHCP server to understand the network topology.#subnet 10.152.187.0 netmask 255.255.255.0 {
#}# This is a very basic subnet declaration.#subnet 10.254.239.0 netmask 255.255.255.224 {
# range 10.254.239.10 10.254.239.20;
# option routers rtr-239-0-1.example.org, rtr-239-0-2.example.org;
#}# This declaration allows BOOTP clients to get dynamic addresses,
# which we don’t really recommend.#subnet 10.254.239.32 netmask 255.255.255.224 {
# range dynamic-bootp 10.254.239.40 10.254.239.60;
# option broadcast-address 10.254.239.31;
# option routers rtr-239-32-1.example.org;
#}# A slightly different configuration for an internal subnet.
#subnet 10.5.5.0 netmask 255.255.255.224 {
# range 10.5.5.26 10.5.5.30;
# option domain-name-servers ns1.internal.example.org;
# option domain-name “internal.example.org”;
# option routers 10.5.5.1;
# option broadcast-address 10.5.5.31;
# default-lease-time 600;
# max-lease-time 7200;
#}# Hosts which require special configuration options can be listed in
# host statements. If no address is specified, the address will be
# allocated dynamically (if possible), but the host-specific information
# will still come from the host declaration.#host passacaglia {
# hardware ethernet 0:0:c0:5d:bd:95;
# filename “vmunix.passacaglia”;
# server-name “toccata.fugue.com”;
#}# Fixed IP addresses can also be specified for hosts. These addresses
# should not also be listed as being available for dynamic assignment.
# Hosts for which fixed IP addresses have been specified can boot using
# BOOTP or DHCP. Hosts for which no fixed address is specified can only
# be booted with DHCP, unless there is an address range on the subnet
# to which a BOOTP client is connected which has the dynamic-bootp flag
# set.
#host fantasia {
# hardware ethernet 08:00:07:26:c0:a5;
# fixed-address fantasia.fugue.com;
#}# You can declare a class of clients and then do address allocation
# based on that. The example below shows a case where all clients
# in a certain class get addresses on the 10.17.224/24 subnet, and all
# other clients get addresses on the 10.0.29/24 subnet.#class “foo” {
# match if substring (option vendor-class-identifier, 0, 4) = “SUNW”;
#}#shared-network 224-29 {
# subnet 10.17.224.0 netmask 255.255.255.0 {
# option routers rtr-224.example.org;
# }
# subnet 10.0.29.0 netmask 255.255.255.0 {
# option routers rtr-29.example.org;
# }
# pool {
# allow members of “foo”;
# range 10.17.224.10 10.17.224.250;
# }
# pool {
# deny members of “foo”;
# range 10.0.29.10 10.0.29.230;
# }
#}

subnet 192.168.10.0 netmask 255.255.255.0 {
# デフォルトゲートウェイ指定
option routers 192.168.10.1;
# サブネットマスク指定
option subnet-mask 255.255.255.0;
# 貸し出すIPアドレスの範囲指定
range dynamic-bootp 192.168.10.200 192.168.10.254;
}

#!/bin/bash
/sbin/ipvsadm -C
/sbin/ipvsadm -A -t 192.168.1.120:80 -s rr
/sbin/ipvsadm -a -t 192.168.1.120:80 -r 192.168.10.10:80 -m
/sbin/ipvsadm -a -t 192.168.1.120:80 -r 192.168.10.11:80 -m
/sbin/ipvsadm -Ln
/etc/init.d/ipvsadm save

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).# The loopback network interface
auto lo
iface lo inet loopback# The primary network interface
auto eth0
iface eth0 inet manualauto br0
iface br0 inet static
address 192.168.1.2
netmask 255.255.255.0
broadcast 192.168.1.255
gateway 192.168.1.1
dns-nameservers 192.168.1.2 192.168.1.1
dns-search it-ishin.com
bridge_ports eth0
bridge_fd 9
bridge_hello 2
bridge_maxage 12
bridge_stp off

auto br0:0
iface br0:0 inet static
address 192.168.1.120
netmask 255.255.255.0
broadcast 192.168.1.255
gateway 192.168.1.1
dns-nameservers 192.168.1.2 192.168.1.1
dns-search it-ishin.com
bridge_ports eth0
bridge_fd 9
bridge_hello 2
bridge_maxage 12
bridge_stp off

auto p10p1
iface p10p1 inet static
address 192.168.10.1
netmask 255.255.255.0
broadcast 192.168.10.255
network 192.168.10.0
gateway 192.168.1.1
dns-nameservers 192.168.1.1
pre-up /sbin/sysctl net.ipv4.conf.p10p1.forwarding=1
pre-up /sbin/iptables -t nat -A POSTROUTING -s 192.168.10.0/24 -j MASQUERADE
# pre-up /etc/init.d/isc-dhcp3-server stop
# post-up /etc/init.d/isc-dhcp3-server start
post-down /sbin/iptables -t nat -D POSTROUTING -s 192.168.10.0/24 -j MASQUERADE
post-down /sbin/sysctl net.ipv4.conf.p10p1.forwarding=0