[one-users] Configure - Script Network - Init
Miguel J. - Templeir
mjcampos at citic.es
Wed Mar 18 04:05:54 PDT 2009
Hello
This file "/etc/network/interfaces" hosts the information
(Debian/ubuntu) of network interface but I want to know when I have to
launch the vmcontext script during boot time of vm to avoid the
networking re-initialization. Actually, while booting the VM, the
network initialize twice. The system starts it up the first time BEFORE
the execution of vmcontext (so the values are incorrect) and the second
is launched inside vmcontext to re-initialize the network with the
correct values (after the generation of /etc/network/interfaces).
I think there is a better way of doing this but i don't know it. How
did you solve it?
Raul Sampedro escribió:
> Hello Miguel
>
> On Wed, Mar 18, 2009 at 9:46 AM, Miguel J. - Templeir <mjcampos at citic.es> wrote:
>
>> VM work correctly and create and destroy without problems.
>>
>> My Question is in the boot of VM. When any VM is booting, Open Nebula with
>> the vnet configuration assign a MAC to this VM. This MAC with this script,
>> change IP address and configuration network. Then I restart interfaces
>> network to update IP and configuration but I want to setup files of interfaz
>> before init the script network of RC.
>>
>> For example in ubuntu: /etc/init.d/network
>>
>
> That script reads the information from the file
> /etc/network/interfaces and the configuration of OpenNebula is also
> there.
>
> cheers!
>
>> Javier Fontan escribió:
>>
>>> Hello Miguel,
>>>
>>> Have you checked that your VM is up and running? Issue a onevm list
>>> command to see the state and if it is "runn" you can also see what physical
>>> node is executing it. In case you are using xen hypervisor you can go to
>>> that node a use xm console one-<vmid> to open a console to that VM and see
>>> what is happening and check if the network was correctly configured.
>>>
>>> I am not so familiarized with Centos networking scripts but if that
>>> scripts are correctly configured after the init script that brings up the
>>> net it should work. Check the generated scripts and try to bring up the
>>> network manually.
>>>
>>> Bye
>>>
>>> On Mar 17, 2009, at 12:23 PM, Miguel J. - Templeir wrote:
>>>
>>>
>>>> Hello
>>>>
>>>> I've finished the configuration of Open Nebula, with the Front End
>>>> (master-nebula) and the Clusters (nebula 1, 2, ...).
>>>>
>>>> But when I created a vm from master-nebula:
>>>>
>>>> onevm create centos-public.one
>>>>
>>>> When I created the vm, I'm execute:
>>>>
>>>> onevnet show 0 (the id of VLAN)
>>>>
>>>> This command show the ip of VM. So, I can connect via ssh, but I couldn't
>>>> connect.
>>>>
>>>> -------
>>>>
>>>> I use script:
>>>> http://www.opennebula.org/doku.php?id=documentation:howto_vnet
>>>>
>>>> And modify some lines for the differents distributions of Unix. The
>>>> script for centos 5.2:
>>>>
>>>> ------------
>>>> #!/bin/bash
>>>> #
>>>> # chkconfig: 2345 10 90 -- Priority RC, Init after
>>>> interfaz network. But i want before.
>>>> # description: network reconfigure
>>>> # #
>>>> -------------------------------------------------------------------------- #
>>>> # Copyright 2002-2009, Distributed Systems Architecture Group,
>>>> Universidad #
>>>> # Complutense de Madrid (dsa-research.org)
>>>> #
>>>> #
>>>> #
>>>> # Licensed under the Apache License, Version 2.0 (the "License"); you may
>>>> #
>>>> # not use this file except in compliance with the License. You may obtain
>>>> #
>>>> # a copy of the License at
>>>> #
>>>> #
>>>> #
>>>> # http://www.apache.org/licenses/LICENSE-2.0
>>>> #
>>>> #
>>>> #
>>>> # Unless required by applicable law or agreed to in writing, software
>>>> #
>>>> # distributed under the License is distributed on an "AS IS" BASIS,
>>>> #
>>>> # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
>>>> implied. #
>>>> # See the License for the specific language governing permissions and
>>>> #
>>>> # limitations under the License.
>>>> #
>>>>
>>>> #---------------------------------------------------------------------------
>>>> #
>>>>
>>>> # Gets IP address from a given MAC
>>>> mac2ip() {
>>>> mac=$1
>>>> let ip_a=0x`echo $mac | cut -d: -f 3`
>>>> let ip_b=0x`echo $mac | cut -d: -f 4`
>>>> let ip_c=0x`echo $mac | cut -d: -f 5`
>>>> let ip_d=0x`echo $mac | cut -d: -f 6`
>>>> ip="$ip_a.$ip_b.$ip_c.$ip_d"
>>>> echo $ip
>>>> }
>>>> # Gets the network part of an IP
>>>> get_network() {
>>>> IP=$1
>>>> echo $IP | cut -d'.' -f1,2,3
>>>> }
>>>> get_interfaces() {
>>>> IFCMD="/sbin/ifconfig -a"
>>>> $IFCMD | grep ^eth | sed 's/ *Link encap:Ethernet.*HWaddr /-/g'
>>>> }
>>>> get_dev() {
>>>> echo $1 | cut -d'-' -f 1
>>>> }
>>>> get_mac() {
>>>> echo $1 | cut -d'-' -f 2
>>>> }
>>>> gen_hosts() {
>>>> NETWORK=$1
>>>> echo "127.0.0.1 localhost"
>>>> for n in `seq -w 01 99`; do
>>>> n2=`echo $n | sed 's/^0*//'`
>>>> echo ${NETWORK}.$n2 cluster${n}
>>>> done
>>>> }
>>>> gen_exports() {
>>>> NETWORK=$1
>>>> echo "/images ${NETWORK}.0/255.255.255.0(rw,async,no_subtree_check)"
>>>> }
>>>> gen_hostname() {
>>>> MAC=$1
>>>> NUM=`mac2ip $MAC | cut -d'.' -f4`
>>>> NUM2=`echo 000000$NUM | sed 's/.*\(..\)/\1/'`
>>>> echo cluster$NUM2
>>>> }
>>>> gen_interface() {
>>>> DEV_MAC=$1
>>>> DEV=`get_dev $DEV_MAC`
>>>> MAC=`get_mac $DEV_MAC`
>>>> IP=`mac2ip $MAC`
>>>> cat <<EOT
>>>> DEVICE=$DEV
>>>> BOOTPROTO=none
>>>> HWADDR=$MAC
>>>> ONBOOT=yes
>>>> TYPE=Ethernet
>>>> NETMASK=255.255.255.0
>>>> IPADDR=$IP
>>>> EOT
>>>> if [ $DEV == "eth0" ]; then
>>>> echo " GATEWAY=$NETWORK.1"
>>>> fi
>>>> echo ""
>>>> }
>>>> IFACES=`get_interfaces`
>>>> for i in $IFACES; do
>>>> MASTER_DEV_MAC=$i
>>>> DEV=`get_dev $i`
>>>> MAC=`get_mac $i`
>>>> IP=`mac2ip $MAC`
>>>> NETWORK=`get_network $IP`
>>>> done
>>>> # gen_hosts $NETWORK > /etc/hosts
>>>> # gen_exports $NETWORK > /etc/exports
>>>> # gen_hostname $MAC > /etc/hostname
>>>> (
>>>> cat <<EOT
>>>>
>>>> EOT
>>>>
>>>> for i in $IFACES; do
>>>> gen_interface $i
>>>> done
>>>> ) > /etc/sysconfig/network-scripts/ifcfg-${DEV}
>>>>
>>>> # *Two lines, bellow:
>>>> This lines restarting network to re-configure IP with the new
>>>> configuration. Because when the Os start, Mac Address Change to change IP.
>>>>
>>>> This script run correctly but I've been trying to configure RC to avoid
>>>> reset interfaz network. I think that I don't know configure correctly RC in
>>>> Centos 5.2, ubuntu 8.04.1. And the question is... How I can configure RC to
>>>> init the script correctly without reset interfaces network?
>>>>
>>>> **ifdown $DEV
>>>> ifup $DEV*
>>>>
>>>> exit $RETVAL
>>>> # /bin/hostname `cat /etc/hostname`
>>>> ------------------
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>> Users at lists.opennebula.org
>>>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>>>
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>>
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