initscripts, xen and bonding
by Axel Thimm
Hi,
I'm having a hard time getting bonding to work on FC5t3. It looks like
the bond0 interface bond0 is renamed to pbond0 by xen [*] and the
enslaving does not work anymore then. It works if I log on the
terminal and ifenslave the devices to pbond0 instead of bond0 after
the boot process has finished.
But I want this to be handled automatically during reboots, so I tried
assigning the bonding slaves to pbond0 as a master in the
ifcfg-eth{0,1} scripts, but that doesn't work.
What is causing the bond0 rename and should this renaming be
considered by initscript? Is this a user error or should I file this
against bugzilla? xen or initscripts?
Thanks!
[*] The only reference I found was a Japanese site and google's
translation of it.
http://translate.google.com/translate?hl=en&sl=ja&u=http://hoop.euqset.or...
--
Axel.Thimm at ATrpms.net
17 years, 1 month
Re: [Fedora-xen] VLANs on DomU domains
by Bertho Stultiens
> I am setting up a box with FC6 + xen with FC6 for the DomU guests.
> I have a server with 4 gigabit ports and I want to use 802.1Q vlans on
> one of the gig ports.
> I have the VLANs configured in Dom0 without any addresses attached to
> them.
> How do I make the VLANs available to the guests? I want to make 4
> VLANs available to each guest. I have thought of a few alternatives
> but I cannot get any to work.
The easy way; I have installed FC6 with 802.1Q and 4 guests. It works
very nicely. For each guest do:
1 - You need to enable vlans /etc/sysconfig/network.
NETWORKING=yes
VLAN=yes
NETWORKING_IPV6=no
HOSTNAME=xenbox2.example.com
GATEWAY=192.168.42.1
2 - create a subinterface by file editting
/etc/sysconfig/network-scripts/ifcfg-eth0.42:
DEVICE=eth0.42
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.42.102
NETMASK=255.255.255.0
TYPE=Ethernet
3 - depending on whether you want untagged packets on the same
interface, you need to edit the /etc/.../ifcfg-eth0 file too. (note: the
parent interface must be up for the tagged interface to work.) The lines
commented out will assign an IP address to the untagged interface:
DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
TYPE=Ethernet
# BOOTPROTO=static
# IPADDR=172.16.42.102
# NETMASK=255.255.255.0
4 - make sure that your /etc/hosts setup is correct. If you have DNS
available 24/7, then only define localhost[.localdomain} as 127.0.0.1
and not the hostname itself.
When you restart the network in the guest, then your guest will default
to use the tagged interface vlan 42 (above example). If you want the
untagged interface as default, then you can change the gateway and
assign an IP address to it.
On the host, you need to do a similar thing. Create a subinterface
eth0.42 and assign an IP address to it. Once that is done, you can talk
to your guests via dot1Q from your host.
Beware of iptables! If you have a firewall setup, then you need to make
sure that it is done right. Doing it right, though, is a though job with
dot1Q in place. I have the firewall completely disabled on the host and
guests. My firewall is placed physically separated on another box.
> 1. Bridge the tagged 802.1Q stream from the Gig port through to the
> guests and configure eth0.x. on the guests
This would be above scenario.
> 2. Create a bridge on Dom0 for each VLAN so that they appear as
> eth0...eth3 on the guests.
The xenbrX interfaces on the host already transport all packets because
they are L2 bridges (see brctl). The bridge does not care whether the
packets are .1Q tagged or not. The only thing you need is to instruct
the kernel to look for/act on specifics by creating (sub-)interfaces.
Now, if you want the guests not to know that they are connected to a
VLAN, then you need a brigde-interface to do (un-)tagging for you. That
means that you need to create a dot1Q subinterface on the host's
physical peth[0-3] and add the subinterface to a new bridge.
Normal scenario:
peth0 -> xenbr0 -> vif0.0(host eth0)
vif1.0(guest1 eth0)
Dot1Q scenario:
peth0.42 -> xenbr42 -> vif1.0(guest1 eth0)
i.e.:
# brctl addbr xenbr42
# ip link set xenbr42 up
# vconfig add peth0 42
# ip link set peth0.42 up
# brctl addif xenbr42 peth0.42
In the VM config you have now something like:
vif = [ 'mac=00:16:3e:11:22:33, bridge=xenbr42', ]
The VM's eth0 interface is created as part of bridge that will fowrard
to a subinterface. The kernel will now do the tagging/untagging (note:
slow) and the VM cannot see that it is attached to a VLAN.
Theoretically it should work, but I was not able to make this scenario
work as expected though. I suspect that the hosts peth0 -> eth0 bridge
is interfering (which has a tagged interface too in my setup). Or maybe
my fingers were too fast at typing and I forgot a simple thing...
> The xen documentation is minimal for configuring VLANs. Is there a
> (FC6) supported way of configuring them?
Vlans is a no-issue for xen. It is layered in the network and xen only
passes the packets.
--
Greetings Bertho
Bertho Stultiens
Senior Systems Manager
Mobilethink A/S
17 years, 2 months
Simple testing results for Xen and VMX on FC5-test2.
by You, Yongkang
Hi all,
I have done a simple checking for Xen and VMX on FC5-test2. Basically, I can create VMX on FC5-test2 IA32. But FC5-test2 IA32e (x86-64) doesn't provide Xen and Xen0 kernel, so didn't do Xen and VMX testing for it.
Beside of testing Xen and VMX, I also found some issues about installation, which I have updated the bug #179078 as a NB. The following is the testing results only for Xen and VMX.
=========================
1. *** IA32E hasn't RPMS about Xen hypervisor and Xen0/XenU kernels. __FAIL__
2. *** In order to boot up IA32 Xen0, I have to add pci=noacpi as the boot
parameters of Xen0 kernel, or system will hang when initial PCI. I don't know if it is only related to my Machine. __FAIL__
3. After install IA32 Xen RPMs, I can see /boot/grub/grub.conf has been changed
with Xen kernels. __PASS__
4. *** /usr/lib/xen/boot/vmxloader isn't in the RPM package, so VMX Guest
couldn't be created. I suspected build system hasn't bcc, it is from DEV86
package. __FAIL__
5. After copy a useable vmxloader to the destination, IA32 VMX Guest can be
created successfully! __PASS__
6. VMX has good network connection and Xwindows started. __PASS__
7. XenU can be created and works well. __PASS__
8. Couldn't get Xen Changeset by "xm info" or "xm dmesg".
9. The new kernel names of Xen/Xen0/XenU seemed a little confused. E.g. the Xen0 name is like vmlinuz-2.6.15-1.29_FC5hypervisor. I thought hypervisor is for Xen.gz. Xen0 is the Service OS.
==========================
Any comments please let me know. But I will have 8 days holiday from tomorrow, so emails reply might be slow and occasional.
[FYI] We are planning to do more testing for FC5-test3.
Best Regards,
Yongkang (Kangkang) 永康
17 years, 3 months
treating logical volumes as physical drives
by Justin Wickett
I would like to use a logical volume as a "physical" drive on which I
can install a fedora operating system. As of now, when I run xenguest-
installer, it treats the install location that I specified ( which is
an unformatted logical volume that I had just created ) as a physical
drive (named "xvda") and allows me to perform a basic install on it.
When I look at that logical volume, it comes up as a "foreign"
device, because it contains a /boot directory, and a volume group
consisting of a / directory and a swap directory. I was wondering
how to mimic that effect without using my xenguest-installer program,
so that when I pop a CD in and the installer starts up, I can specify
a logical volume and let the installer treat it as a physical drive
just like the xenguest-installer program does.
I am trying to accomplish this because I was unable to install FC4
via the xenguest-installer. I had mounted the image as a loopback
device to /var/ftp/pub and specified the /pub directory in FTP
server's root folder as my "Installation source", and was greeted by
an error from my FTP server (vsftpd) saying "550 Failed to change
directory". When I do the exact same thing except mount the FC6 iso
instead of the FC4 iso, everything works fine. What could I be doing
wrong?
If all else fails, I guess I can just specify in my /etc/xen/xm-
fc4-001 file the kernel and the ramdisk parameters, and install FC4
on an ext3 formatted logical volume specified as the / directory, and
thus reuse my existing /boot directory instead of trying to use the
pygrub bootloader with a new /boot directory. In this case, where
could I find a compiled xenU kernel and an appropriate initrd image
for FC4?
Thank you very much and happy new years to all!
Justin Wickett
Duke 2010
http://www.duke.edu/~jyw2
17 years, 3 months
starting a vm with virt-manager
by Henning Sprang
Hi,
Somehow I'd expect such a nice graphical tool as virt.manager, that,
if I can install, (and start the installed machine directly after
install), stop, restore, and do all the other nice things with a xen
vm, I must also be able to simply start a vm for which I have a config
lying around.
But I see nowhere any "start a vm" option. The only thing that is
there is a "restore vm" option, but when I chose a normal vm config
file, it always says "error restring domain - is the domain already
running".
I assume, this function is really only for domains that I saved (not
the same as opposed to shut down, at leat in xen terminology).
Is that right? Am I right that virt.manager has no functionality to
simply start a vm with it's config file, and I must do this manually?
Henning
17 years, 3 months
FC6 Xen stability?
by Tony Coffman
Can anybody offer their experience running a production FC6/Xen environment?
I'm looking for big uptimes for a mix of FC5/FC6 paravirtualized guests.
I'm currently running FC5 as the host using the non-PAE 2133 kernel. I
had issues (random lockups and network failures after 2-3 days) with the
next 3-4 kernels that shipped after 2133 so I got off the upgrade
treadmill but as a result I'm pretty far behind.
I'd like to get current and switch to PAE but I'm really not looking
forward to more problems so I'm wondering about the stability of current
FC6? In particular if you have a favorite kernel/Xen version that's
produced high uptimes I'd love to hear about it.
Thanks,
--Tony
17 years, 4 months
winxp from cdrom
by Shirazi, Goodarz
Hi folks,
how can I install winxp from cdrom the drive assembly?
Virtual Machine Manager auf FC6 says:
Install location must be an NFS, HTTP or FTP install source
17 years, 4 months
Format of guest image files?
by Philip Rhoades
People,
Firstly, congratulations on some nice work! - I could not get
inter-guest or host-guest networking on FC5 but it started working
immediately on FC6 - thanks!
On a FC6 host I have created a FC6 guest minimal install (everything
checked off except for text networking) in a 1.5GB image file. What is
the format of this image? Is it possible to somehow use a loopback
switch to mount it like iso9660? - I want to be able to make a copy of
the image file; in the image, edit the /etc/sysconfig/network
and /etc/sysconfig/network-scripts/ifcfg-eth0 files; add an
appropriate /etc/xen config file and then be able to boot a second
guest. Is this possible somehow?
Thanks,
Phil.
--
Philip Rhoades
Pricom Pty Limited (ACN 003 252 275 ABN 91 003 252 275)
GPO Box 3411
Sydney NSW 2001
Australia
Mobile: +61:(0)411-185-652
Fax: +61:(0)2-8221-9599
E-mail: phil(a)pricom.com.au
17 years, 4 months
Using large disk in DomU
by Robin Bowes
Hi,
I'm running Xen 3.0.3 on FC6 with FC6 DomU guests.
On the Dom0 machine, I have 8 x 500GB disks running as a RAID6 array
with lvm on top of that. There is one partition available:
/dev/vg_media/lv_media which has an ext3 FS on it.
I want to make this available to a DomU guest, so I put this in the xen
config file:
disk = [ 'phy:/dev/vg_host/lv_slim,xvda,w',
'phy:/dev/vg_media/lv_media,sda1,w', ]
The disk appears in the DomU guest, but if I fsck it, this is what I see:
# fsck /dev/sda1
fsck 1.39 (29-May-2006)
e2fsck 1.39 (29-May-2006)
The filesystem size (according to the superblock) is 732575744 blocks
The physical size of the device is 195704832 blocks
Either the superblock or the partition table is likely to be corrupt!
Abort<y>? yes
Any idea what's going on here? Am I doing something wrong?
R.
17 years, 4 months
