Xen users - Apr 2008 - I finally got a virtual os up, now a few questions...

I wasn''t able to get a paravirtual os up.  For some reason, during the
install, after the message no ipv6 routers available, I would get prompted
for stage2.img file.  It would ask for an ftp server and the path.  I tried
several of the mirrors that fedora project listed and would still get the
same problem.  So I finally decided to make a virtual os so that I could
install fedora 8 from my dvd.

Anyhow, I have a system up and running, however lftp and firefox can''t
connect to the internet.  I route -n and everything came up normally, i
restarted the /etc/init.d/network restart and it restarted fine, but I just
don''t seem to get any connectivity on firefox and lftp.  What do I need
to
do?
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I was having similar problems... I did a total rebuild this way and all
is working...

I am using RHEL 5.1
When you build the XEN server DO NOT USE DHCP, assign a manual IP
address and this will give you ability to use XEBR0.

When building your paraviritual server, when asked for the first DHCP
use the DHCP, this will allow you to use an HTTP or FTP for locate the
stage2.img. I went round and round with Red Hat support and the
difference was the first DHCP, I was using manually assigned IP but tech
was using DHCP. I switched and was able to locate the stage2.img and
move on.

Doing the two steps above will allow you to access the Xebr0 and pass
the internet to your PV servers. 

I am new to LINUX let alone Xen, but the steps above is working for me.

On a side note, DO NOT update , Xen or PV servers built, until you are
done. I did an update right after building the Xen server and LOST
Xebr0. So, build everything first then update them.

Still learning here so maybe someone else can offer you some better
advice. Just letting you know what worked for me.

Tony

Anthony Marquez
Systems Administrator
Information Technology & Communications
New Mexico Department of Agriculture
MSC 3189 /P.O. Box 30005
Las Cruces, NM 88003-8005
Voice (575) 646-2543/Cell (575) 649-4050
Fax (575) 646-1841

-----Original Message-----
From: xen-users-bounces@lists.xensource.com
[mailto:xen-users-bounces@lists.xensource.com] On Behalf Of trist007
Sent: Thursday, April 03, 2008 3:56 PM
To: xen-users@lists.xensource.com
Subject: [Xen-users] I finally got a virtual os up, now a few
questions...


I wasn''t able to get a paravirtual os up.  For some reason, during the
install, after the message no ipv6 routers available, I would get
prompted
for stage2.img file.  It would ask for an ftp server and the path.  I
tried
several of the mirrors that fedora project listed and would still get
the
same problem.  So I finally decided to make a virtual os so that I could
install fedora 8 from my dvd.

Anyhow, I have a system up and running, however lftp and firefox can''t
connect to the internet.  I route -n and everything came up normally, i
restarted the /etc/init.d/network restart and it restarted fine, but I
just
don''t seem to get any connectivity on firefox and lftp.  What do I need
to
do?
-- 
View this message in context:
http://www.nabble.com/I-finally-got-a-virtual-os-up%2C-now-a-few-questio
ns...-tp16473871p16473871.html
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Sounds like some networking issues.  In my network environment I have multiple
VLANs going to my XEN servers and I''ve found it useful to set up the
bridges for networking (e.g. xenbr0) on my own in Linux and not let Xen do the
bridge setup.  I create /etc/sysconfig/network-scripts/ifcfg-xenbr<vlan>
(where VLAN is one of the numeric VLAN IDs I have) and configure the bridges
that way.  Then I make sure that my Xen domU config file specifies the bridge
that I want to use for that particular domU.
 
It sounds like your domU (or HVM) isn''t able to pick up an IP address
for the network interface - assuming you have a network interface configured. 
This would allow you to get the initial part of the install running, right up to
loading of stage2.img, because all of this is included with the initrd stuff. 
Stage2.img, however, must be loaded from a mirror.  Since you were able to load
the O/S from a DVD and you''re now having trouble connecting to the
Internet, you''re likely not getting a connection at all.  Some useful
information to help you here would be: 1) your domU config file, 2) the output
of "ifconfig -a" in your domU, and 3) the configuration
you''ve specified for your network interface in domU (e.g.
/etc/sysconfig/network-scripts/ifcfg-eth0).
 
-Nick
>>> On 2008/04/03 at 15:56, trist007 <drakoth777@yahoo.com>
wrote:
I wasn''t able to get a paravirtual os up.  For some reason, during the
install, after the message no ipv6 routers available, I would get prompted
for stage2.img file.  It would ask for an ftp server and the path.  I tried
several of the mirrors that fedora project listed and would still get the
same problem.  So I finally decided to make a virtual os so that I could
install fedora 8 from my dvd.

Anyhow, I have a system up and running, however lftp and firefox can''t
connect to the internet.  I route -n and everything came up normally, i
restarted the /etc/init.d/network restart and it restarted fine, but I just
don''t seem to get any connectivity on firefox and lftp.  What do I need
to
do?
-- 
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http://www.nabble.com/I-finally-got-a-virtual-os-up%2C-now-a-few-questions...-tp16473871p16473871.html
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Sounds like overkill to me.  You say you''re not familiar with Linux,
though, so I can understand how this would be a frustrating experience.  As I
said in my reply to the original post in this thread, I generally configure the
bridges in standard Linux networking config and don''t leave it to XEN
to do this configuration.  This should work regardless of whether you have DHCP
running or not - obviously without DHCP you''ll need to set up more than
just the IP address of that interface, you need to set a gateway address, DNS
servers, etc.  DHCP does all of this automatically, so that could be the source
of the problem.
 
I''ve also never had a problem with updating either my domUs or my
servers - I generally make sure the servers are done during install time and the
same with the domUs - I do the SuSE updates at install time.
 
-Nick
>>> On 2008/04/03 at 16:41, "Marquez, Anthony"
<amarquez@nmda.nmsu.edu> wrote:
I was having similar problems... I did a total rebuild this way and all
is working...

I am using RHEL 5.1
When you build the XEN server DO NOT USE DHCP, assign a manual IP
address and this will give you ability to use XEBR0.

When building your paraviritual server, when asked for the first DHCP
use the DHCP, this will allow you to use an HTTP or FTP for locate the
stage2.img. I went round and round with Red Hat support and the
difference was the first DHCP, I was using manually assigned IP but tech
was using DHCP. I switched and was able to locate the stage2.img and
move on.

Doing the two steps above will allow you to access the Xebr0 and pass
the internet to your PV servers. 

I am new to LINUX let alone Xen, but the steps above is working for me.

On a side note, DO NOT update , Xen or PV servers built, until you are
done. I did an update right after building the Xen server and LOST
Xebr0. So, build everything first then update them.

Still learning here so maybe someone else can offer you some better
advice. Just letting you know what worked for me.

Tony

Anthony Marquez
Systems Administrator
Information Technology & Communications
New Mexico Department of Agriculture
MSC 3189 /P.O. Box 30005
Las Cruces, NM 88003-8005
Voice (575) 646-2543/Cell (575) 649-4050
Fax (575) 646-1841

-----Original Message-----
From: xen-users-bounces@lists.xensource.com 
[mailto:xen-users-bounces@lists.xensource.com] On Behalf Of trist007
Sent: Thursday, April 03, 2008 3:56 PM
To: xen-users@lists.xensource.com 
Subject: [Xen-users] I finally got a virtual os up, now a few
questions...


I wasn''t able to get a paravirtual os up.  For some reason, during the
install, after the message no ipv6 routers available, I would get
prompted
for stage2.img file.  It would ask for an ftp server and the path.  I
tried
several of the mirrors that fedora project listed and would still get
the
same problem.  So I finally decided to make a virtual os so that I could
install fedora 8 from my dvd.

Anyhow, I have a system up and running, however lftp and firefox can''t
connect to the internet.  I route -n and everything came up normally, i
restarted the /etc/init.d/network restart and it restarted fine, but I
just
don''t seem to get any connectivity on firefox and lftp.  What do I need
to
do?
-- 
View this message in context:
http://www.nabble.com/I-finally-got-a-virtual-os-up%2C-now-a-few-questio 
ns...-tp16473871p16473871.html
Sent from the Xen - User mailing list archive at Nabble.com.


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http://lists.xensource.com/xen-users 




This e-mail may contain confidential and privileged material for the sole use of
the intended recipient.  If this email is not intended for you, or you are not
responsible for the delivery of this message to the intended recipient, please
note that this message may contain SEAKR Engineering (SEAKR)
Privileged/Proprietary Information.  In such a case, you are strictly prohibited
from downloading, photocopying, distributing or otherwise using this message,
its contents or attachments in any way.  If you have received this message in
error, please notify us immediately by replying to this e-mail and delete the
message from your mailbox.  Information contained in this message that does not
relate to the business of SEAKR is neither endorsed by nor attributable to
SEAKR.


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The output of ifconfig -a in my DomU

eth0 Link encap:Ethernet HWaddr 00:16:3E:34:32:0D
inet addr:192.168.122.59 Bcast:192.168.122.255Mask:255.255.255.0  
inet6 addr: fe80::216:3eff:fe34:320d/64 Scope:Link
UP BRAODCAST RUNNING MULTICAST MTU:1500 Metric:1
Rx packets:8 errors:0 dropped:0 overruns:0 frame:0
tX packets:33 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1091 (1.0 KiB) TX bytes:4894 (4.7 KiB)
Interrupt:17

lo  Link encap:Local Loopback
    inet addr:127.0.0.1 Mask:255.0.0.0
    inet6 addr: ::1/128 Scope:host
   UP LOOPBACK RUNNING MTU:16436 Metric:1
   RX packets:3182 errors:0 dropped:0 overruns:0 frame:0
   TX packets:3182 errors:0 dropped:0 overruns:0 carrier:0
   collisions:0 txqueuelen:0
   RX bytes:2525572 (2.4 MiB) TX bytes:2525572 (2.4 MiB)

here''s my /etc/sysconfig/network-scripts/ifcfg-eth0

# Realtk Semiconductor Co., Ltd. RTL-8139/8139C/8139C+
DEVICE=eth0
BOOTPROTO=dhcp
HWADDR=00:16:3E:34:32:0D
ONBOOT=yes


as for the domU config file I tried looking in /etc/xen/ for drakoth, which
is the name of my domU, in my dom0 computer but there was nothing there,
should I create one?  Also, I''m trying to learn all this network stuff,
so
if you could please explain your instructions and try to teach me while your
writing your reply, that is if you have time, but I''m dying to learn. 
Like
in the output of ifconfig-a  i know that eth0 is my ethernet card, what is
lo?  Also, when I boot up dom0 there''s a message that says my MAC
address is
different than expected.  Alright, there you go.

   
   


Sounds like some networking issues.  In my network environment I have
multiple VLANs going to my XEN servers and I''ve found it useful to set
up
the bridges for networking (e.g. xenbr0) on my own in Linux and not let Xen
do the bridge setup.  I create
/etc/sysconfig/network-scripts/ifcfg-xenbr<vlan> (where VLAN is one of the
numeric VLAN IDs I have) and configure the bridges that way.  Then I make
sure that my Xen domU config file specifies the bridge that I want to use
for that particular domU.
 
It sounds like your domU (or HVM) isn''t able to pick up an IP address
for
the network interface - assuming you have a network interface configured. 
This would allow you to get the initial part of the install running, right
up to loading of stage2.img, because all of this is included with the initrd
stuff.  Stage2.img, however, must be loaded from a mirror.  Since you were
able to load the O/S from a DVD and you''re now having trouble
connecting to
the Internet, you''re likely not getting a connection at all.  Some
useful
information to help you here would be: 1) your domU config file, 2) the
output of "ifconfig -a" in your domU, and 3) the configuration
you''ve
specified for your network interface in domU (e.g.
/etc/sysconfig/network-scripts/ifcfg-eth0).
 
-Nick


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