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xen-users
Re: [Xen-users] DomU networking help please
They appear to be on different subnets - are you using an external
router? - if so, make sure you have a default route to the gateway,
otherwise try setting the DomU's IP to something the in the Dom0's
network...
Kent
Andrew Olds wrote:
Hi please forgive this if it seems a dumb question but I am new to xen and
linux. I have Xen running in Centos and another Centos Partition DomU running.
But I cannot seem to get networking running between 0 and U.
All the doco appears to assume you know everything about networking bridging
and the like. Does anyone have a simple how to step by step on how to get a
single dom0 talking to a single DomU.
Below is the output from ifconfig from dom0
eth0 Link encap:Ethernet HWaddr 00:11:11:BD:C0:23
inet addr:10.0.0.5 Bcast:10.0.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:672 (672.0 b)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1383 errors:0 dropped:0 overruns:0 frame:0
TX packets:1383 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1417720 (1.3 MiB) TX bytes:1417720 (1.3 MiB)
peth0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:640 (640.0 b)
Interrupt:16
vif0.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:672 (672.0 b) TX bytes:0 (0.0 b)
xen-br0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet addr:10.0.0.5 Bcast:10.0.0.255 Mask:255.255.255.255
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:588 (588.0 b) TX bytes:0 (0.0 b)
and domU
eth0 Link encap:Ethernet HWaddr AA:BB:CC:DD:00:11
inet addr:10.1.0.5 Bcast:10.1.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:65 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:2730 (2.6 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:117 errors:0 dropped:0 overruns:0 frame:0
TX packets:117 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:10220 (9.9 KiB) TX bytes:10220 (9.9 KiB)
and my config file.
# -*- mode: python; -*-
#============================================================================
# Python configuration setup for 'xm create'.
# This script sets the parameters used when a domain is created using 'xm
create'.
# You use a separate script for each domain you want to create, or
# you can set the parameters for the domain on the xm command line.
#============================================================================
#----------------------------------------------------------------------------
# Kernel image file.
kernel = "/boot/vmlinuz-2.6.12-xenU"
# Optional ramdisk.
ramdisk = "/boot/initrd-2.6.12-xen0"
# The domain build function. Default is 'linux'.
#builder='linux'
# Initial memory allocation (in megabytes) for the new domain.
memory = 128
# A name for your domain. All domains must have different names.
name = "RHL"
# Which CPU to start domain on?
#cpu = -1 # leave to Xen to pick
#----------------------------------------------------------------------------
# Define network interfaces.
# Number of network interfaces. Default is 1.
nics = 1
# Optionally define mac and/or bridge for the network interfaces.
# Random MACs are assigned if not given.
vif = [ 'mac=aa:bb:cc:dd:00:11, bridge=xen-br0' ]
#----------------------------------------------------------------------------
# Define the disk devices you want the domain to have access to, and
# what you want them accessible as.
# Each disk entry is of the form phy:UNAME,DEV,MODE
# where UNAME is the device, DEV is the device name the domain will see,
# and MODE is r for read-only, w for read-write.
disk = [ 'phy:/dev/VolGroup00/LogVol00,sda1,w' ]
#----------------------------------------------------------------------------
# Set the kernel command line for the new domain.
# You only need to define the IP parameters and hostname if the domain's
# IP config doesn't, e.g. in ifcfg-eth0 or via DHCP.
# You can use 'extra' to set the runlevel and custom environment
# variables used by custom rc scripts (e.g. VMID=, usr= ).
# Set if you want dhcp to allocate the IP address.
#dhcp="dhcp"
# Set netmask.
#ipaddr="192.168.0.3"
#netmask="255.255.255.0"
# Set default gateway.
#gateway="192.168.0.1"
# Set the hostname.
#hostname= "vm%d" % vmid
hostname = "RHL"
# Set root device.
root = "/dev/sda1 ro"
# Root device for nfs.
#root = "/dev/nfs"
# The nfs server.
#nfs_server = '169.254.1.0'
# Root directory on the nfs server.
#nfs_root = '/full/path/to/root/directory'
# Sets runlevel 4.
extra = "5"
#----------------------------------------------------------------------------
# Set according to whether you want the domain restarted when it exits.
# The default is 'onreboot', which restarts the domain when it shuts down
# with exit code reboot.
# Other values are 'always', and 'never'.
#restart = 'onreboot'
#============================================================================
All I am looking for is a really simple explanation of what all the interfaces
do and how to get the doms talking to each other.
Thanks very much
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http://lists.xensource.com/xen-users
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