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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-users] Xen install
Hi, When i boot into my xen-linux2.6.11.10 kernel and give the command xend start i get the following message > > [root@tfrc1 ~]# xend start > Traceback (most recent call last): > File "/usr/sbin/xend", line 27, in ? > from xen.xend.server import SrvDaemon > File "/auto/groups/xeno-xenod/users/xenod/cron-build/R24768.dir/xen- > 2.0.bk/dist/install/usr/lib/python/xen/xend/server/SrvDaemon.py", line 20, > in ? > ImportError: No module named twisted.internet > [root@tfrc1 ~]# > > Please suggest what to do. > > Thanks > Sriram On Tue, 21 Jun 2005 06:48:20 -0400 (EDT), xen-users-request wrote > Send Xen-users mailing list submissions to > xen-users@xxxxxxxxxxxxxxxxxxx > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users > or, via email, send a message with subject or body 'help' to > xen-users-request@xxxxxxxxxxxxxxxxxxx > > You can reach the person managing the list at > xen-users-owner@xxxxxxxxxxxxxxxxxxx > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Xen-users digest..." > > Today's Topics: > > 1. Re: Stable VBD Types (Nils Toedtmann) > 2. Kernel panic, unable to mount rootfs (Matthew J. Harmon) > 3. Re: Kernel panic, unable to mount rootfs (Matthew J. Harmon) > 4. Re: Re: Kernel panic, unable to mount rootfs (Yvette Chanco) > 5. big sized applications in XEN virtual machine (Andre Kuester) > 6. Re: big sized applications in XEN virtual machine > (Fajar A. Nugraha) > > 7. Re: big sized applications in XEN virtual machine (Wim > Coekaerts) > 8. Re: big sized applications in XEN virtual machine > (Fajar A. Nugraha) > 9. Re: Xen Install (James Bulpin) > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 21 Jun 2005 00:10:33 +0200 > From: Nils Toedtmann <xen-users@xxxxxxxxxxxxxxxxxx> > Subject: Re: [Xen-users] Stable VBD Types > To: mail@xxxxxxxxxxxxxxxx > Cc: xen-users@xxxxxxxxxxxxxxxxxxx > Message-ID: <1119305434.3840.6.camel@xxxxxxxxxxxxxxxxxxxxxxx> > Content-Type: text/plain > > Am Montag, den 20.06.2005, 18:11 +0100 schrieb [GDPR REDACTED]: > [...] > > Thanks. Although this is relevent to what I'm wanting to do, what I > > meant to say was using lvm snapshots as a way to reduce common files > > from repeating on disk. I quote the LVM-HowTo as it explains it a little > > better. > > > > "It is also useful for creating volumes for use with Xen. You can create > > a disk image, then snapshot it and modify the snapshot for a particular > > domU instance. You can then create another snapshot of the original > > volume, and modify that one for a different domU instance. Since the > > only storage used by a snapshot is blocks that were changed on the > > origin or the snapshot, the majority of the volume is shared by the > > domU's." > [...] > > We use the device-mapper for this. Works for us [tm]: > > dd if=/dev/zero of=/tmp/CoW1 bs=1M count=$CoW_SIZE > dd if=/dev/zero of=/tmp/CoW2 bs=1M count=$CoW_SIZE > > losetup /dev/loop0 root_fs > losetup /dev/loop1 /tmp/CoW1 > losetup /dev/loop2 /tmp/CoW2 > > BLOCKSIZE=`blockdev --getsize /dev/loop0` > > echo "0 $BLOCKSIZE linear /dev/loop0 > 0" \ | dmsetup create rootfs_base > > echo "0 $BLOCKSIZE snapshot /dev/mapper/rootfs_base /dev/loop1 p > 8" \ | dmsetup create rootfs1 > > echo "0 $BLOCKSIZE snapshot /dev/mapper/rootfs_base /dev/loop2 p > 8" \ | dmsetup create rootfs2 > > You should now be able to use /dev/mapper/rootfs{1|2} read/write. > Only diff blocks to "root_fs" get written to "/tmp/CoW{1|2}". > > This way we boot >20 domUs off one root_fs (after shutdown we delete > the CoW files). I have now clue how to do that with LVM[2]. > > /nils. > > -- > there is no sig > > ------------------------------ > > Message: 2 > Date: Mon, 20 Jun 2005 17:56:17 -0500 (CDT) > From: "Matthew J. Harmon" <mjh@xxxxxxxx> > Subject: [Xen-users] Kernel panic, unable to mount rootfs > To: xen-users@xxxxxxxxxxxxxxxxxxx > Message-ID: <Pine.LNX.4.62.0506201748260.32722@xxxxxxxxxxxxx> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > Alright, thank you for the "noreboot" kernel option! > > Here is the full err: > > Root-NFS: No NFS server available, giving up. > VFS: Unable to mount root fs via NFS, trying floppy. > VFS: Cannot open root device "sda2" or unknown-block(2,0) > Please append a correct "root=" boot option > Kernel panic - not syncing: VFS: Unable to mount root fs on > unknown-block(2,0) > > Doing a bit of research on the error message, found the following > threads on xen-devel: http://lists.xensource.com/archives/html/xen- > devel/2004-10/msg00382.html > http://lists.xensource.com/archives/html/xen-devel/2004-12/msg00470.html > > I'm thinking this might not be a xen problem, but a grub problem? > > Still working on the issue, any tips would be appreciated. > > Thanks. > > -Matthew > > ------------------------------ > > Message: 3 > Date: Mon, 20 Jun 2005 18:13:22 -0500 (CDT) > From: "Matthew J. Harmon" <mjh@xxxxxxxx> > Subject: [Xen-users] Re: Kernel panic, unable to mount rootfs > To: xen-users@xxxxxxxxxxxxxxxxxxx > Message-ID: <Pine.LNX.4.62.0506201811200.32722@xxxxxxxxxxxxx> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > Additionally, the menu.lst for grub is as follows: > > title Debian GNU/Linux, Xen 2.6.11xen0, testing 2005.06.18 > kernel=/xen.gz dom0_mem=32768 noreboot > root (hd0,0) > module=(hd0,0)/xen-linux-2.6.11charliexen0 root=/dev/sda2 ro > console=tty0 console=ttyS0 showopts selinux=0 > ### BEGIN AUTOMAGIC KERNELS LIST > ###[snip - all default] > > -M > > On Mon, 20 Jun 2005, Matthew J. Harmon wrote: > > Alright, thank you for the "noreboot" kernel option! > > Here is the full err: > > Root-NFS: No NFS server available, giving up. > VFS: Unable to mount root fs via NFS, trying floppy. > VFS: Cannot open root device "sda2" or unknown-block(2,0) > Please append a correct "root=" boot option > Kernel panic - not syncing: VFS: Unable to mount root fs on unknown- > block(2,0) > > Doing a bit of research on the error message, found the following > threads on xen-devel: http://lists.xensource.com/archives/html/xen- > devel/2004-10/msg00382.html > http://lists.xensource.com/archives/html/xen-devel/2004-12/msg00470.html > > I'm thinking this might not be a xen problem, but a grub problem? > > Still working on the issue, any tips would be appreciated. > > Thanks. > > -Matthew > > ------------------------------ > > Message: 4 > Date: Mon, 20 Jun 2005 19:28:02 -0500 > From: Yvette Chanco <yentlsoup@xxxxxxxxx> > Subject: Re: [Xen-users] Re: Kernel panic, unable to mount rootfs > To: "Matthew J. Harmon" <mjh@xxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx > Message-ID: <cda40682050620172815c07bc6@xxxxxxxxxxxxxx> > Content-Type: text/plain; charset=ISO-8859-1 > > If you're getting that far (to starting the dom0) then grub might not > directly be the issue. I got that error message when I was using a > kernel (for dom0) that hadn't been compiled with support for my scsi > adapter. From the looks of your menu.lst, though, it seems you > probably did a custom build, so you would know what you included. My > only other guess is if there is an initrd image you haven't put in > the grub configuration? > > On 6/20/05, Matthew J. Harmon <mjh@xxxxxxxx> wrote: > > Additionally, the menu.lst for grub is as follows: > > > > title Debian GNU/Linux, Xen 2.6.11xen0, testing 2005.06.18 > > kernel=/xen.gz dom0_mem=32768 noreboot > > root (hd0,0) > > module=(hd0,0)/xen-linux-2.6.11charliexen0 root=/dev/sda2 ro console=tty0 > > console=ttyS0 showopts selinux=0 > > ### BEGIN AUTOMAGIC KERNELS LIST > > ###[snip - all default] > > > > -M > > > > On Mon, 20 Jun 2005, Matthew J. Harmon wrote: > > > > Alright, thank you for the "noreboot" kernel option! > > > > Here is the full err: > > > > Root-NFS: No NFS server available, giving up. > > VFS: Unable to mount root fs via NFS, trying floppy. > > VFS: Cannot open root device "sda2" or unknown-block(2,0) > > Please append a correct "root=" boot option > > Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block (2,0) > > > > Doing a bit of research on the error message, found the following threads on > > xen-devel: > > http://lists.xensource.com/archives/html/xen-devel/2004-10/msg00382.html > > http://lists.xensource.com/archives/html/xen-devel/2004-12/msg00470.html > > > > I'm thinking this might not be a xen problem, but a grub problem? > > > > Still working on the issue, any tips would be appreciated. > > > > Thanks. > > > > -Matthew > > > > _______________________________________________ > > Xen-users mailing list > > Xen-users@xxxxxxxxxxxxxxxxxxx > > http://lists.xensource.com/xen-users > > > > -- > -Yvette Chanco > www.option-c.com > > ------------------------------ > > Message: 5 > Date: Tue, 21 Jun 2005 04:04:45 +0200 > From: Andre Kuester <andre.kuester@xxxxxxxxx> > Subject: [Xen-users] big sized applications in XEN virtual machine > To: xen-users@xxxxxxxxxxxxxxxxxxx > Message-ID: <4ee1f99605062019041832dc70@xxxxxxxxxxxxxx> > Content-Type: text/plain; charset=ISO-8859-1 > > Hi, > > recently I discovered the exsistance of Xen. I looked a bit around > and feel quite impressed by this solution. Then an idea came to my > mind, having a partition for a more or less stable server and one > for my bleeding edge desktop playground. I think I am not the only > one with that ;) But I dont want to use the typical lamp server > config, I thought more about a massive database server, such as DB2 > together with a recent version of SAP Netweaver. Both of them are > quite memory and of course IO-hungry. I have decent hardware to run > that, but I couldnt found any experience report about such a xen-DB2- > SAP combination. So I ask you, if there are any experiences with > that. In special I ask myself, how the removal of the TLS libraries might > affect performance and stability of those applications. > (Preferred OS is RHEL4) > > I would be glad to hear some hints or experiences. > > Thanks & Regards, > Andre. > > ------------------------------ > > Message: 6 > Date: Tue, 21 Jun 2005 10:19:28 +0700 > From: "Fajar A. Nugraha" <fajar@xxxxxxxxxxxxx> > Subject: Re: [Xen-users] big sized applications in XEN virtual > machine To: xen-users@xxxxxxxxxxxxxxxxxxx Message-ID: <42B78740.20401@xxxxxxxxxxxxx> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Andre Kuester wrote: > > >So I ask you, if there are any experiences > >with that. In special I ask myself, how the removal of the TLS libraries might > >affect performance and stability of those applications. > >(Preferred OS is RHEL4) > > > > > > > I tried using Oracle 10g on a rather old version of Xen from bk (it > still uses kernel 2.6.9) with Lineox 4. > TLS libs (/lib/tls, /usr/lib/tls, /usr/X11r6/lib/tls) moved out of > the way. This configuration works great running MTA (mail filtering > purposes) and web server (LAMP). However it didn't work quite as > expected running Oracle. Oracle runs, but often I would get entries > like these on alert log : > > ORA-07445: exception encountered: core dump [kkogbro()+2832] > [SIGSEGV] [Address not mapped to object] [0x0] [] [] ORA-00600: > internal error code, arguments: [kghssgai2], [1], [36], [], [], [], > [], [] ORA-00600: internal error code, arguments: [kghssgai2], [1], > [20], [], [], [], [], [] ORA-07445: exception encountered: core dump > [kkogbro()+2832] [SIGSEGV] [Address not mapped to object] [0x0] [] > [] ORA-00600: internal error code, arguments: [kghssgai2], [5], [36], > [], [], [], [], [] ORA-07445: exception encountered: core dump > [kkogbro()+2832] [SIGSEGV] [Address not mapped to object] [0x0] [] > [] ORA-07445: exception encountered: core dump [kkogbro()+2832] > [SIGSEGV] [Address not mapped to object] [0x0] [] [] ORA-00600: > internal error code, arguments: [kghssgai3], [128], [20], [], [], [], > [], [] ORA-00600: internal error code, arguments: [kghssgai2], [5], > [20], [], [], [], [], [] > > and sometimes it just dies. > Revert back to native linux, everything works fine. > > I haven't had time to test current Xen 2.0.6 (or nightly snapshot) though. > > Regards, > > Fajar > > ------------------------------ > > Message: 7 > Date: Mon, 20 Jun 2005 20:36:03 -0700 > From: Wim Coekaerts <wim.coekaerts@xxxxxxxxxx> > Subject: Re: [Xen-users] big sized applications in XEN virtual > machine To: "Fajar A. Nugraha" <fajar@xxxxxxxxxxxxx> Cc: xen- users@xxxxxxxxxxxxxxxxxxx > Message-ID: <20050621033602.GA4554@xxxxxxxxxxxxxxxxxxxxxxxx> > Content-Type: text/plain; charset=us-ascii > > ve had it running for quite some time without problems. even the middle > tier stack. > > been pretty solid > > On Tue, Jun 21, 2005 at 10:19:28AM +0700, Fajar A. Nugraha wrote: > > Andre Kuester wrote: > > > > >So I ask you, if there are any experiences > > >with that. In special I ask myself, how the removal of the TLS libraries > > >might > > >affect performance and stability of those applications. > > >(Preferred OS is RHEL4) > > > > > > > > > > > I tried using Oracle 10g on a rather old version of Xen from bk (it > > still uses kernel 2.6.9) with Lineox 4. > > TLS libs (/lib/tls, /usr/lib/tls, /usr/X11r6/lib/tls) moved out of the way. > > This configuration works great running MTA (mail filtering purposes) and > > web server (LAMP). > > However it didn't work quite as expected running Oracle. > > Oracle runs, but often I would get entries like these on alert log : > > > > ORA-07445: exception encountered: core dump [kkogbro()+2832] [SIGSEGV] > > [Address not mapped to object] [0x0] [] [] > > ORA-00600: internal error code, arguments: [kghssgai2], [1], [36], [], > > [], [], [], [] > > ORA-00600: internal error code, arguments: [kghssgai2], [1], [20], [], > > [], [], [], [] > > ORA-07445: exception encountered: core dump [kkogbro()+2832] [SIGSEGV] > > [Address not mapped to object] [0x0] [] [] > > ORA-00600: internal error code, arguments: [kghssgai2], [5], [36], [], > > [], [], [], [] > > ORA-07445: exception encountered: core dump [kkogbro()+2832] [SIGSEGV] > > [Address not mapped to object] [0x0] [] [] > > ORA-07445: exception encountered: core dump [kkogbro()+2832] [SIGSEGV] > > [Address not mapped to object] [0x0] [] [] > > ORA-00600: internal error code, arguments: [kghssgai3], [128], [20], [], > > [], [], [], [] > > ORA-00600: internal error code, arguments: [kghssgai2], [5], [20], [], > > [], [], [], [] > > > > and sometimes it just dies. > > Revert back to native linux, everything works fine. > > > > I haven't had time to test current Xen 2.0.6 (or nightly snapshot) though. > > > > Regards, > > > > Fajar > > > > _______________________________________________ > > Xen-users mailing list > > Xen-users@xxxxxxxxxxxxxxxxxxx > > http://lists.xensource.com/xen-users > > ------------------------------ > > Message: 8 > Date: Tue, 21 Jun 2005 11:04:13 +0700 > From: "Fajar A. Nugraha" <fajar@xxxxxxxxxxxxx> > Subject: Re: [Xen-users] big sized applications in XEN virtual > machine To: xen-users@xxxxxxxxxxxxxxxxxxx Message-ID: <42B791BD.6010303@xxxxxxxxxxxxx> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Wim Coekaerts wrote: > > >ve had it running for quite some time without problems. even the middle > >tier stack. > > > >been pretty solid > > > > > Oracle 10G? On which version of Xen and which Linux distro? > I'd like to test it again soon. > > Regards, > > Fajar > > ------------------------------ > > Message: 9 > Date: Tue, 21 Jun 2005 11:47:48 +0100 > From: James Bulpin <james@xxxxxxxxxxxxx> > Subject: Re: [Xen-users] Xen Install > To: sramara@xxxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx > Message-ID: <42B7F054.6020900@xxxxxxxxxxxxx> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Please send replies to the list rather than only to me. > > Have you installed Twisted? > > James > > Ramarathnam Sriram wrote: > > Hi James, > > Thanks alot for your prompt response. > > Now when i boot into my xen-linux2.6.11.10 kernel and give the command > > xend start i get the following message > > > > [root@tfrc1 ~]# xend start > > Traceback (most recent call last): > > File "/usr/sbin/xend", line 27, in ? > > from xen.xend.server import SrvDaemon > > File "/auto/groups/xeno-xenod/users/xenod/cron-build/R24768.dir/xen- > > 2.0.bk/dist/install/usr/lib/python/xen/xend/server/SrvDaemon.py", line 20, > > in ? > > ImportError: No module named twisted.internet > > [root@tfrc1 ~]# > > > > Please suggest what to do. > > > > Thanks > > Sriram > > > > > > On Mon, 20 Jun 2005 17:01:36 +0100, James Bulpin wrote > > > >>Ramarathnam Sriram wrote: > >> > >>>Hi, > >>> I am trying to install xen on top of Fedora > >>>I appended the following lines in menu.lst file > >>> > >>> title Xen 2.0 / XenLinux 2.6 > >>> kernel /boot/xen-2.0.gz dom0_mem=131072 > >>> module /boot/vmlinuz-2.6-xen0 root=/dev/sda4 ro console=tty0 > >> > >>This is direct copy from the user manual without modification for > >>your own system I suspect. > >> > >> > >>>it gives the following errror > >>> > >>>Root-NFS: no NFS server available,giving up > >>>VFS: Unable to mount root fs via NFS,trying floppy > >>>VFS: Insert root floppy and press enter > >>> > >>> > >>>And when I press enter I see > >>>kernel panic (not syncing...) > >>>(I did not catch the rest) > >>>and it reboots. > >>> > >>>also i tried changing root=/dev/hdc since that is what my root is > >>>inside /etc/fstab. > >> > >>No it isn't, according to your followup email: > >> > >> /dev/VolGroup00/LogVol00 / ext3 defaults 1 1 > >> > >>You'll need an initrd for the kernel to be able to mount this. > >> > >>Boot into native Linux and run as root (I'm assuming XenLinux 2.6.11 > >>- substitute your actual version): > >> > >> mkinitrd /boot/initrd-2.6.11-xen0.img 2.6.11-xen0 > >> > >> (you may have to do "depmod -a 2.6.11-xen0" first) > >> > >>Append the following line to the Xen entry in your GRUB menu.lst > >> > >> module /boot/initrd-2.6.11-xen0.img > >> > >>Change the root= option to root=/dev/VolGroup00/LogVol00 > >> > >>James > > > > > > > > ------------------------------ > > _______________________________________________ > Xen-users mailing list > Xen-users@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-users > > End of Xen-users Digest, Vol 4, Issue 61 > **************************************** Sriram Ramarathnam, Graduate Student,Computer Science Clemson University _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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