DHCP
The following article describes how to use DHCP from inside a container. Note that it requires veth device.
Set up[edit]
Assumes you have set up vzbr0, as described on Virtual Ethernet device.
vzctl create 144 --ostemplate centos-4-i386-minimal vzctl start 144 vzyum 144 install dhcp vzctl set 144 --netif_add eth0 --save brctl show brctl addif vzbr0 veth144.0 ifconfig vzbr0 cat /proc/sys/net/ipv4/conf/vzbr0/forwarding cat /proc/sys/net/ipv4/conf/vzbr0/proxy_arp echo 1 > /proc/sys/net/ipv4/conf/vzbr0/forwarding echo 1 > /proc/sys/net/ipv4/conf/vzbr0/proxy_arp
Instructions largely borrowed from http://oob.freeshell.org/nzwireless/dhcpd.html
Sample DHCPD.conf[edit]
# Sample /etc/dhcpd.conf
# Set DHCPD to answer requests on the wireless interface
DHCPDARGS=wlan0;
# Set some defaults for lease time and DNS update method
ddns-update-style ad-hoc;
default-lease-time 600;
max-lease-time 7200;
# Set the subnet mask for the wireless IP network
option subnet-mask 255.255.255.0;
# Set the Broadcast address. This will be 10.x.x.255,
# the "x.x" will depend upon the network assigned to you by NZWireless.
option broadcast-address 10.1.2.255;
# Set the router address, this will be 10.x.x.1, the address
# of your wireless interface WLAN0
option routers 10.1.2.1;
# Set the Name Server address. This will be the same as your WLAN0 address
# because we intend to run DNS on this machine.
option domain-name-servers 10.1.2.1;
# Set the default domain name for clients on this network.
# i.e. the DNS domain assigned to you by your wireless administrator.
option domain-name "simon.akld.nzwireless.org";
# Allocate a network range for dynamic IP addresses to hand out to clients.
# Again, this range will be in 10.x.x.x, depending upon the network allocated
# to you by your wireless administrator.
subnet 10.1.2.0 netmask 255.255.255.0 {
range 10.1.2.10 10.1.2.20;
}
Host$ cp /etc/sysconfig/network /vz/root/144/etc/sysconfig/network
vz144$ service dhcpd start
External links[edit]
- http://www.cpqlinux.com/dhcpd.html - create static IPs, debugging etc.
- http://mailman.vyatta.com/pipermail/vyatta-users/2007-September/001858.html - not configured to listen on any interfaces
- http://forum.openvz.org/index.php?t=msg&goto=22072& - diagnosis
- http://www.google.ca/search?q=DHCPDARGS+brctl - searches for help on getting a virtual bridge to work with DHCPD
- http://www.linuxfoundation.org/en/Net:Bridge - great explanation of bridging
