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mbjohn@duke.edu

2006-Mar-29 15:16 UTC

[Xen-users] xen and boot problems (with CentOS 4.2)

Hello --

We''re trying to get a Centos 4.2 system working under a Centos 4.2
operating system using the instructions we found at
http://mark.foster.cc/wiki/index.php/Centos-4_on_Xen.  The prospect of
running several virtual servers on one physical box is pretty
intriguing.  I think we''re pretty close, but we''ve gotten to a
place
that has me stumped.  I''m hoping someone can help.

We''ve gotten to a place where we can actually boot our VM by running
''xm create -c /etc/xen/vm03 vmid=3'' (we are using the
configuration from
the Xen documentation).  We see the standard kernel boot
up messages and things start out well.  Then we get to:


EXT2-fs warning (device sdb3): ext2_fill_super: mounting ext3 filesystem
as ext2

VFS: Mounted root (ext2 filesystem).
Freeing unused kernel memory: 184k freed
unix: no version for "struct_module" found: kernel tainted.
NET: Registered protocol family 1
INIT: version 2.85 booting
               Welcome to  CentOS release 4.2 (Final)
               Press ''I'' to enter interactive startup.
Starting udev:  [  OK  ]
Initializing hardware...  storage network audio done[  OK  ]
raidautorun: RAID_AUTORUN failed: 19
mount: mount point devpts does not exist
Configuring kernel parameters:  [  OK  ]
Setting clock : Tue Mar 28 16:01:59 EST 2006 [  OK  ]
Setting hostname localhost:  [  OK  ]
Checking root filesystem
[/sbin/fsck.ext3 (1) -- /] fsck.ext3 -a /dev/sdb3
/dev/sdb3 is mounted.  e2fsck: Cannot continue, aborting.


[FAILED]

*** An error occurred during the file system check.
*** Dropping you to a shell; the system will reboot
*** when you leave the shell.
Press enter for maintenance
(or type Control-D to continue):


I cannot for the life of me figure out what''s going wrong. 
I''ve
dropped into the maintenance shell and done a fsck, but as soon as I
try to boot it back up again, the same problem.

Thank you for any help.

Brian

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Haavard Bjerke

2006-Mar-29 15:24 UTC

head link

Re: [Xen-users] xen and boot problems (with CentOS 4.2)

mbjohn@duke.edu wrote:> Hello --
> 
> We''re trying to get a Centos 4.2 system working under a Centos 4.2
> operating system using the instructions we found at
> http://mark.foster.cc/wiki/index.php/Centos-4_on_Xen.  The prospect of
> running several virtual servers on one physical box is pretty
> intriguing.  I think we''re pretty close, but we''ve gotten
to a place
> that has me stumped.  I''m hoping someone can help.
> 
> We''ve gotten to a place where we can actually boot our VM by
running
> ''xm create -c /etc/xen/vm03 vmid=3'' (we are using the
configuration from
> the Xen documentation).  We see the standard kernel boot
> up messages and things start out well.  Then we get to:
> 
> 
> EXT2-fs warning (device sdb3): ext2_fill_super: mounting ext3 filesystem
> as ext2
> 
> VFS: Mounted root (ext2 filesystem).
> Freeing unused kernel memory: 184k freed
> unix: no version for "struct_module" found: kernel tainted.
> NET: Registered protocol family 1
> INIT: version 2.85 booting
>                Welcome to  CentOS release 4.2 (Final)
>                Press ''I'' to enter interactive startup.
> Starting udev:  [  OK  ]
> Initializing hardware...  storage network audio done[  OK  ]
> raidautorun: RAID_AUTORUN failed: 19
> mount: mount point devpts does not exist
> Configuring kernel parameters:  [  OK  ]
> Setting clock : Tue Mar 28 16:01:59 EST 2006 [  OK  ]
> Setting hostname localhost:  [  OK  ]
> Checking root filesystem
> [/sbin/fsck.ext3 (1) -- /] fsck.ext3 -a /dev/sdb3
> /dev/sdb3 is mounted.  e2fsck: Cannot continue, aborting.
> 
> 
> [FAILED]
> 
> *** An error occurred during the file system check.
> *** Dropping you to a shell; the system will reboot
> *** when you leave the shell.
> Press enter for maintenance
> (or type Control-D to continue):
> 
> 
> I cannot for the life of me figure out what''s going wrong. 
I''ve
> dropped into the maintenance shell and done a fsck, but as soon as I
> try to boot it back up again, the same problem.
> 
Try adding "fastboot" to the "extra" parameter in the domU
config file.
It helps for SL, so I suspect it might for Centos aswell.

Havard

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mbjohn@duke.edu

2006-Mar-29 15:27 UTC

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Re: [Xen-users] xen and boot problems (with CentOS 4.2)

Thank you so much for the quick reply!  The fastboot option did the
trick and I''m now in my virtual machine!

Should I be concerned about having to use the fastboot option?  Will it
cause problems later on?

Thanks again!

Brian
>
> Try adding "fastboot" to the "extra" parameter in the
domU config file.
> It helps for SL, so I suspect it might for Centos aswell.
>
> Havard
>
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Haavard Bjerke

2006-Mar-29 15:30 UTC

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Re: [Xen-users] xen and boot problems (with CentOS 4.2)

I don''t know if you should be concerned, but if you find out that you 
should and have a better solution, then please let me know :)

Havard

mbjohn@duke.edu wrote:> Thank you so much for the quick reply!  The fastboot option did the
> trick and I''m now in my virtual machine!
> 
> Should I be concerned about having to use the fastboot option?  Will it
> cause problems later on?
> 
> Thanks again!
> 
> Brian
> 
> 
>>Try adding "fastboot" to the "extra" parameter in
the domU config file.
>>It helps for SL, so I suspect it might for Centos aswell.
>>
>>Havard
>>

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mbjohn@duke.edu

2006-Mar-29 15:39 UTC

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Re: [Xen-users] xen and boot problems (with CentOS 4.2)

Hehe, well, if it works for everyone else, I''m satisfied ;)

Thanks again!

Brian

On Wed, 29 Mar 2006, Haavard Bjerke wrote:
> I don''t know if you should be concerned, but if you find out that
you
> should and have a better solution, then please let me know :)
>
> Havard
>
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Eric Peterson

2006-Mar-29 15:57 UTC

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Re: [Xen-users] xen and boot problems (with CentOS 4.2)

On 3/29/06, mbjohn@duke.edu <mbjohn@duke.edu>
wrote:> Thank you so much for the quick reply!  The fastboot option did the
> trick and I''m now in my virtual machine!
>
> Should I be concerned about having to use the fastboot option?  Will it
> cause problems later on?
>
> Thanks again!
>
> Brian
fastboot won''t cause problems by itself.  It disables fsck checking on
boot.  fsck is complaining in this case because it thinks the
partition is mounted.  The way that you would find problems later on
is when the system was shutdown uncleanly and no disk check was forced
on the filesystem.

This shouldn''t be a problem with you domU systems since you should
know when things have been shutdown uncleanly and you should be able
to run fsck manually on the partition from dom0 before it''s next boot.

I wonder why fsck is confused?  How are you passing the block device
on to the domU? It isn''t mounted in dom0 is it?  Is it a file or
partition?  Sorry for all the questions but I''m curious.

Cheers!
Eric

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mbjohn@duke.edu

2006-Mar-29 16:09 UTC

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Re: [Xen-users] xen and boot problems (with CentOS 4.2)

Hi Eric,

Thanks for the added info on using the fastboot option.  That made a lot
of sense.

As for the confusion regarding fsck, I''m not sure what''s going
on.  We are
using file based block devices, and our config file looks like this:

disk = [ ''file:/srv/xen/domains/vm03/diskimage,sdb3,w'',
         ''file:/srv/xen/domains/vm03/swapimage,sdb4,w'' ]

Our physical disk is sda, so using sdb3 and sdb4 shouldn''t interfere
with
those devices.

I did, however, get a different response from the message I posted with
our LUG that I''d like to share with list.  They suggested booting with
an
initrd.img.  So, I took the extra = "fastboot" option out and added a
ramdisk option so my config then looked like this:

kernel = "/boot/vmlinuz-2.6.12.6-xen3_12.1_rhel4.1"
ramdisk = "/boot/initrd-2.6.12.6-xen3_12.1_rhel4.1.img"

And that also seemed to do the trick :)

Thank you again to the folks who responded to my cry for help....We''re
looking forward to what xen will allow us to do.

Brian
> I wonder why fsck is confused?  How are you passing the block device
> on to the domU? It isn''t mounted in dom0 is it?  Is it a file or
> partition?  Sorry for all the questions but I''m curious.
>
> Cheers!
> Eric
>
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John Cianfarani

2006-Mar-29 22:38 UTC

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RE: [Xen-users] xen and boot problems (with CentOS 4.2)

I believe adding the below line should also fix it.  I run CentOS 4.2 as
well and use this line instead of the fastboot.

root = "/dev/sda1 ro"

Thanks
John

-----Original Message-----
From: xen-users-bounces@lists.xensource.com
[mailto:xen-users-bounces@lists.xensource.com] On Behalf Of
mbjohn@duke.edu
Sent: Wednesday, March 29, 2006 10:17 AM
To: xen-users@lists.xensource.com
Subject: [Xen-users] xen and boot problems (with CentOS 4.2)

Hello --

We''re trying to get a Centos 4.2 system working under a Centos 4.2
operating system using the instructions we found at
http://mark.foster.cc/wiki/index.php/Centos-4_on_Xen.  The prospect of
running several virtual servers on one physical box is pretty
intriguing.  I think we''re pretty close, but we''ve gotten to a
place
that has me stumped.  I''m hoping someone can help.

We''ve gotten to a place where we can actually boot our VM by running
''xm create -c /etc/xen/vm03 vmid=3'' (we are using the
configuration from
the Xen documentation).  We see the standard kernel boot
up messages and things start out well.  Then we get to:


EXT2-fs warning (device sdb3): ext2_fill_super: mounting ext3 filesystem
as ext2

VFS: Mounted root (ext2 filesystem).
Freeing unused kernel memory: 184k freed
unix: no version for "struct_module" found: kernel tainted.
NET: Registered protocol family 1
INIT: version 2.85 booting
               Welcome to  CentOS release 4.2 (Final)
               Press ''I'' to enter interactive startup.
Starting udev:  [  OK  ]
Initializing hardware...  storage network audio done[  OK  ]
raidautorun: RAID_AUTORUN failed: 19
mount: mount point devpts does not exist
Configuring kernel parameters:  [  OK  ]
Setting clock : Tue Mar 28 16:01:59 EST 2006 [  OK  ]
Setting hostname localhost:  [  OK  ]
Checking root filesystem
[/sbin/fsck.ext3 (1) -- /] fsck.ext3 -a /dev/sdb3
/dev/sdb3 is mounted.  e2fsck: Cannot continue, aborting.


[FAILED]

*** An error occurred during the file system check.
*** Dropping you to a shell; the system will reboot
*** when you leave the shell.
Press enter for maintenance
(or type Control-D to continue):


I cannot for the life of me figure out what''s going wrong. 
I''ve
dropped into the maintenance shell and done a fsck, but as soon as I
try to boot it back up again, the same problem.

Thank you for any help.

Brian

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



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sadique@vanillanetworks.com

2006-Mar-30 04:52 UTC

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Re: [Xen-users] xen and boot problems (with CentOS 4.2)

Try "e2fsck -f -y <image>" before you start Dom-U and start
Dom-U
without fastboot option. I believe this should work.

Thanks
Sadique

John Cianfarani wrote:
>I believe adding the below line should also fix it.  I run CentOS 4.2 as
>well and use this line instead of the fastboot.
>
>root = "/dev/sda1 ro"
>
>Thanks
>John
>
>-----Original Message-----
>From: xen-users-bounces@lists.xensource.com
>[mailto:xen-users-bounces@lists.xensource.com] On Behalf Of
>mbjohn@duke.edu
>Sent: Wednesday, March 29, 2006 10:17 AM
>To: xen-users@lists.xensource.com
>Subject: [Xen-users] xen and boot problems (with CentOS 4.2)
>
>Hello --
>
>We''re trying to get a Centos 4.2 system working under a Centos 4.2
>operating system using the instructions we found at
>http://mark.foster.cc/wiki/index.php/Centos-4_on_Xen.  The prospect of
>running several virtual servers on one physical box is pretty
>intriguing.  I think we''re pretty close, but we''ve gotten
to a place
>that has me stumped.  I''m hoping someone can help.
>
>We''ve gotten to a place where we can actually boot our VM by
running
>''xm create -c /etc/xen/vm03 vmid=3'' (we are using the
configuration from
>the Xen documentation).  We see the standard kernel boot
>up messages and things start out well.  Then we get to:
>
>
>EXT2-fs warning (device sdb3): ext2_fill_super: mounting ext3 filesystem
>as ext2
>
>VFS: Mounted root (ext2 filesystem).
>Freeing unused kernel memory: 184k freed
>unix: no version for "struct_module" found: kernel tainted.
>NET: Registered protocol family 1
>INIT: version 2.85 booting
>               Welcome to  CentOS release 4.2 (Final)
>               Press ''I'' to enter interactive startup.
>Starting udev:  [  OK  ]
>Initializing hardware...  storage network audio done[  OK  ]
>raidautorun: RAID_AUTORUN failed: 19
>mount: mount point devpts does not exist
>Configuring kernel parameters:  [  OK  ]
>Setting clock : Tue Mar 28 16:01:59 EST 2006 [  OK  ]
>Setting hostname localhost:  [  OK  ]
>Checking root filesystem
>[/sbin/fsck.ext3 (1) -- /] fsck.ext3 -a /dev/sdb3
>/dev/sdb3 is mounted.  e2fsck: Cannot continue, aborting.
>
>
>[FAILED]
>
>*** An error occurred during the file system check.
>*** Dropping you to a shell; the system will reboot
>*** when you leave the shell.
>Press enter for maintenance
>(or type Control-D to continue):
>
>
>I cannot for the life of me figure out what''s going wrong. 
I''ve
>dropped into the maintenance shell and done a fsck, but as soon as I
>try to boot it back up again, the same problem.
>
>Thank you for any help.
>
>Brian
>
>_______________________________________________
>Xen-users mailing list
>Xen-users@lists.xensource.com
>http://lists.xensource.com/xen-users
>
>
>
>_______________________________________________
>Xen-users mailing list
>Xen-users@lists.xensource.com
>http://lists.xensource.com/xen-users
>
>
>  
>

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Xen users - Mar 2006 - xen and boot problems (with CentOS 4.2)

[Xen-users] xen and boot problems (with CentOS 4.2)

Re: [Xen-users] xen and boot problems (with CentOS 4.2)

Re: [Xen-users] xen and boot problems (with CentOS 4.2)

Re: [Xen-users] xen and boot problems (with CentOS 4.2)

Re: [Xen-users] xen and boot problems (with CentOS 4.2)

Re: [Xen-users] xen and boot problems (with CentOS 4.2)

Re: [Xen-users] xen and boot problems (with CentOS 4.2)

RE: [Xen-users] xen and boot problems (with CentOS 4.2)

Re: [Xen-users] xen and boot problems (with CentOS 4.2)