Re: [Xen-users] kernel panics??

[Alex Edwards <edwards.alex@xxxxxxxxx>]

So where would it be reading that script from? Somewhere in the boot there is a line saying fstab.sys not found loading defaults. I have tried renaming the fstab to fstab.sys but this still gives the same error. I am correct in thinking that it is referring to the fstab in the guest file structure.
thanks
Alex

On Wed, Jul 14, 2010 at 2:51 PM, Cristian Colombo <lu3ecc@xxxxxxxxx> wrote:

It looks like its trying to mount an LVM: "Volume group "VolGroup01" not found"

Cristian.

2010/7/14 Alex Edwards <edwards.alex@xxxxxxxxx>

hope these are of some help

fstab

/dev/xvda1              /                       ext3    defaults        1 1
/dev/xvda2              none                    swao    sw              0 0
none                  /dev/pts                devpts  gid=5,mode=620  0 0
none                   /dev/shm                tmpfs   defaults        0 0
none                    /proc                   proc    defaults        0 0
none                   /sys                    sysfs   defaults        0 0

Config file

name="Demo1"
uuid = "4c458561-6f90-6d3b-f68c-8021b900e631"
maxmem = 1024
memory = 1024
vcpus = 1
kernel = "/boot/vmlinuz-2.6.18-194.8.1.el5xen"
ramdisk = "/xen/initrd-2.6.18-194.8.1.el5xen-no-scsi.img"
extra = "selinux=0 ro"
vif= ["mac=00:12:3F:35:A1:56, bridge=br0"]
>>>disk = [ "tap:aio:/xen/Demo1.img,xvda1,w", "tap:aio:/xen/Demo1.swap,xvda2,w" ]

system config
# -*- sh -*-

#
# Xend configuration file.
#

# This example configuration is appropriate for an installation that
# utilizes a bridged network configuration. Access to xend via http
# is disabled.

# Commented out entries show the default for that entry, unless otherwise
# specified.

#(logfile /var/log/xen/xend.log)
#(loglevel DEBUG)

#(xend-http-server no)
(xend-unix-server yes)
#(xend-tcp-xmlrpc-server no)
#(xend-unix-xmlrpc-server yes)
#(xend-relocation-server no)
# The relocation server should be kept desactivated unless using a trusted
# network, the domain virtual memory will be exchanged in raw form without
# encryption of the communication. See also xend-relocation-hosts-allow option

(xend-unix-path /var/lib/xend/xend-socket)

# Port xend should use for the HTTP interface, if xend-http-server is set.
#(xend-port            8000)

# Port xend should use for the relocation interface, if xend-relocation-server
# is set.
#(xend-relocation-port 8002)

# Address xend should listen on for HTTP connections, if xend-http-server is
# set.
# Specifying 'localhost' prevents remote connections.
# Specifying the empty string '' (the default) allows all connections.
#(xend-address '')
#(xend-address localhost)

# Address xend should listen on for relocation-socket connections, if
# xend-relocation-server is set.
# Meaning and default as for xend-address above.
#(xend-relocation-address '')

# The hosts allowed to talk to the relocation port.  If this is empty (the
# default), then all connections are allowed (assuming that the connection
# arrives on a port and interface on which we are listening; see
# xend-relocation-port and xend-relocation-address above).  Otherwise, this
# should be a space-separated sequence of regular expressions.  Any host with
# a fully-qualified domain name or an IP address that matches one of these
# regular expressions will be accepted.
#
# For example:
#  (xend-relocation-hosts-allow '^localhost$ ^.*\.example\.org$')
#
#(xend-relocation-hosts-allow '')
#(xend-relocation-hosts-allow '^localhost$ ^localhost\\.localdomain$')
 ( )
# The limit (in kilobytes) on the size of the console buffer
#(console-limit 1024)

##
# To bridge network traffic, like this:
#
# dom0: fake eth0 -> vif0.0 -+
#                            |
#                          bridge -> real eth0 -> the network
#                            |
# domU: fake eth0 -> vifN.0 -+
#
# use
#
# (network-script network-bridge)
#
# Your default ethernet device is used as the outgoing interface, by default.
# To use a different one (e.g. eth1) use
#
# (network-script 'network-bridge netdev=eth1')
#
# The bridge is named xenbr0, by default.  To rename the bridge, use
#
# (network-script 'network-bridge bridge=<name>')
#
# It is possible to use the network-bridge script in more complicated
# scenarios, such as having two outgoing interfaces, with two bridges, and
# two fake interfaces per guest domain.  To do things like this, write
# yourself a wrapper script, and call network-bridge from it, as appropriate.
#
(network-script /bin/true)

# The script used to control virtual interfaces.  This can be overridden on a
# per-vif basis when creating a domain or a configuring a new vif.  The
# vif-bridge script is designed for use with the network-bridge script, or
# similar configurations.
#
# If you have overridden the bridge name using
# (network-script 'network-bridge bridge=<name>') then you may wish to do the
# same here.  The bridge name can also be set when creating a domain or
# configuring a new vif, but a value specified here would act as a default.
#
# If you are using only one bridge, the vif-bridge script will discover that,
# so there is no need to specify it explicitly.
#
(vif-script vif-bridge)


## Use the following if network traffic is routed, as an alternative to the
# settings for bridged networking given above.
#(network-script network-route)
#(vif-script     vif-route)


## Use the following if network traffic is routed with NAT, as an alternative
# to the settings for bridged networking given above.
#(network-script network-nat)
#(vif-script     vif-nat)


# Dom0 will balloon out when needed to free memory for domU.
# dom0-min-mem is the lowest memory level (in MB) dom0 will get down to.
# If dom0-min-mem=0, dom0 will never balloon out.
(dom0-min-mem 256)

# In SMP system, dom0 will use dom0-cpus # of CPUS
# If dom0-cpus = 0, dom0 will take all cpus available
(dom0-cpus 0)

# Whether to enable core-dumps when domains crash.
#(enable-dump no)

# The tool used for initiating virtual TPM migration
#(external-migration-tool '')

# The interface for VNC servers to listen on. Defaults
# to 127.0.0.1  To restore old 'listen everywhere' behaviour
# set this to 0.0.0.0
(vnc-listen '0.0.0.0')

# The default password for VNC console on HVM domain.
# Empty string is no authentication.
(vncpasswd 'uscl99')

# The default keymap to use for the VM's virtual keyboard
# when not specified in VM's configuration
(keymap 'en-us')

# The VNC server can be told to negotiate a TLS session
# to encryption all traffic, and provide x509 cert to
# clients enalbing them to verify server identity. The
# GTK-VNC widget, virt-viewer, virt-manager and VeNCrypt
# all support the VNC extension for TLS used in QEMU. The
# TightVNC/RealVNC/UltraVNC clients do not.
#
# To enable this create x509 certificates / keys in the
# directory /etc/xen/vnc
#
#  ca-cert.pem       - The CA certificate
#  server-cert.pem   - The Server certificate signed by the CA
#  server-key.pem    - The server private key
#
# and then uncomment this next line
# (vnc-tls 1)
#
# The certificate dir can be pointed elsewhere..
#
# (vnc-x509-cert-dir /etc/xen/vnc)
#
# The server can be told to request & validate an x509
# certificate from the client. Only clients with a cert
# signed by the trusted CA will be able to connect. This
# is more secure the password auth alone. Passwd auth can
# used at the same time if desired. To enable client cert
# checking uncomment this:
#
# (vnc-x509-verify 1)

# Allow probing of disk image file format.  This is insecure!  It lets
# a malicious domU read any file in dom0.  Applies only to fully
# virtual domUs.  Required for using formats other than raw.
#(enable-image-format-probing no)

# Number of seconds xend will wait for device creation
#(device-create-timeout 100)

# Strict checking when doing PCI passthrough; enabled by default
#(pci-dev-assign-strict-check yes)

boot output

Using config file "/etc/xen/Demo1".
Started domain Demo1
Linux version 2.6.18-194.8.1.el5xen (mockbuild@xxxxxxxxxxxxxxxxxxxx) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Thu Jul 1 20:25:56 EDT 2010
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000040800000 (usable)
304MB HIGHMEM available.
727MB LOWMEM available.
Using x86 segment limits to approximate NX protection
ACPI in unprivileged domain disabled
Built 1 zonelists.  Total pages: 264192
Kernel command line:  selinux=0 ro
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
CPU 0 irqstacks, hard=c0758000 soft=c0738000
PID hash table entries: 4096 (order: 12, 16384 bytes)
Xen reported: 2792.998 MHz processor.
Console: colour dummy device 80x25
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Software IO TLB disabled
vmalloc area: ee000000-f4ffe000, maxmem 2d7fe000
Memory: 1024808k/1056768k available (2185k kernel code, 23008k reserved, 896k data, 176k init, 311304k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay using timer specific routine.. 6985.85 BogoMIPS (lpj=13971719)
Security Framework v1.0.0 initialized
SELinux:  Disabled at boot.
Capability LSM initialized
Mount-cache hash table entries: 512
CPU: Trace cache: 12K uops, L1 D cache: 16K
CPU: L2 cache: 1024K
Checking 'hlt' instruction... OK.
SMP alternatives: switching to UP code
Freeing SMP alternatives: 14k freed
Brought up 1 CPUs
checking if image is initramfs... it is
Freeing initrd memory: 7360k freed
Grant table initialized
NET: Registered protocol family 16
Brought up 1 CPUs
PCI: setting up Xen PCI frontend stub
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI: disabled
xen_mem: Initialising balloon driver.
usbcore: registered new driver usbfs
usbcore: registered new driver hub
PCI: System does not support PCI
PCI: System does not support PCI
NetLabel: Initializing
NetLabel:  domain hash size = 128
NetLabel:  protocols = UNLABELED CIPSOv4
NetLabel:  unlabeled traffic allowed by default
NET: Registered protocol family 2
IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
TCP bind hash table entries: 65536 (order: 7, 524288 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
TCP reno registered
audit: initializing netlink socket (disabled)
type=2000 audit(1279116872.808:1): initialized
highmem bounce pool size: 64 pages
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
Initializing Cryptographic API
alg: No test for crc32c (crc32c-generic)
ksign: Installing public key data
Loading keyring
- Added public key 788F05D692FAC105
- User ID: CentOS (Kernel Module GPG key)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
rtc: IRQ 8 is not free.
Non-volatile memory driver v1.2
Linux agpgart interface v0.101 (c) Dave Jones
brd: module loaded
Xen virtual console successfully installed as xvc0
Linux version 2.6.18-194.8.1.el5xen (mockbuild@xxxxxxxxxxxxxxxxxxxx) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Thu Jul 1 20:25:56 EDT 2010
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000040800000 (usable)
304MB HIGHMEM available.
727MB LOWMEM available.
Using x86 segment limits to approximate NX protection
ACPI in unprivileged domain disabled
Built 1 zonelists.  Total pages: 264192
Kernel command line:  selinux=0 ro
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
CPU 0 irqstacks, hard=c0758000 soft=c0738000
PID hash table entries: 4096 (order: 12, 16384 bytes)
Xen reported: 2792.998 MHz processor.
Console: colour dummy device 80x25
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Software IO TLB disabled
vmalloc area: ee000000-f4ffe000, maxmem 2d7fe000
Memory: 1024808k/1056768k available (2185k kernel code, 23008k reserved, 896k data, 176k init, 311304k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay using timer specific routine.. 6985.85 BogoMIPS (lpj=13971719)
Security Framework v1.0.0 initialized
SELinux:  Disabled at boot.
Capability LSM initialized
Mount-cache hash table entries: 512
CPU: Trace cache: 12K uops, L1 D cache: 16K
CPU: L2 cache: 1024K
Checking 'hlt' instruction... OK.
SMP alternatives: switching to UP code
Freeing SMP alternatives: 14k freed
Brought up 1 CPUs
checking if image is initramfs... it is
Freeing initrd memory: 7360k freed
Grant table initialized
NET: Registered protocol family 16
Brought up 1 CPUs
PCI: setting up Xen PCI frontend stub
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI: disabled
xen_mem: Initialising balloon driver.
usbcore: registered new driver usbfs
usbcore: registered new driver hub
PCI: System does not support PCI
PCI: System does not support PCI
NetLabel: Initializing
NetLabel:  domain hash size = 128
NetLabel:  protocols = UNLABELED CIPSOv4
NetLabel:  unlabeled traffic allowed by default
NET: Registered protocol family 2
IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
TCP bind hash table entries: 65536 (order: 7, 524288 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
TCP reno registered
audit: initializing netlink socket (disabled)
type=2000 audit(1279116872.808:1): initialized
highmem bounce pool size: 64 pages
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
Initializing Cryptographic API
alg: No test for crc32c (crc32c-generic)
ksign: Installing public key data
Loading keyring
- Added public key 788F05D692FAC105
- User ID: CentOS (Kernel Module GPG key)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
rtc: IRQ 8 is not free.
Non-volatile memory driver v1.2
Linux agpgart interface v0.101 (c) Dave Jones
brd: module loaded
Xen virtual console successfully installed as xvc0
Event-channel device installed.
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
ide-floppy driver 0.99.newide
usbcore: registered new driver hiddev
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.6:USB HID core driver
PNP: No PS/2 controller found. Probing ports directly.
i8042.c: No controller found.
mice: PS/2 mouse device common for all mice
md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: bitmap version 4.39
TCP bic registered
Initializing IPsec netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
Using IPI No-Shortcut mode
XENBUS: Device with no driver: device/vbd/51713
XENBUS: Device with no driver: device/vbd/51714
XENBUS: Device with no driver: device/vif/0
Initalizing network drop monitor service
Freeing unused kernel memory: 176k freed
Write protecting the kernel read-only data: 395k
Red Hat nash version 5.1.19.6 starting
Mounting proc filesystem
Mounting sysfs filesystem
Creating /dev
Creating initial device nodes
Setting up hotplug.
Creating block device nodes.
Loading xenblk.ko module
Registering block device major 202
Loading ehci-hcd.ko module
Loading ohci-hcd.ko module
Loading uhci-hcd.ko module
USB Universal Host Controller Interface driver v3.0
Loading jbd.ko module
Loading ext3.ko module
Loading scsi_mod.ko module
SCSI subsystem initialized
Loading libata.ko module
Loading ata_piix.ko module
Loading dm-mod.ko module
device-mapper: uevent: version 1.0.3
device-mapper: ioctl: 4.11.5-ioctl (2007-12-12) initialised: dm-devel@xxxxxxxxxx
Loading dm-log.ko module
Loading dm-mirror.ko module
Loading dm-zero.ko module
Loading dm-snapshot.ko module
Loading dm-mem-cache.ko module
Loading dm-region_hash.ko module
Loading dm-message.ko module
Loading dm-raid45.ko module
device-mapper: dm-raid45: initialized v0.2594l
Loading xennet.ko module
netfront: Initialising virtual ethernet driver.
netfront: device eth0 has flipping receive path.
Waiting for driver initialization.
Scanning and configuring dmraid supported devices
Scanning logical volumes
  Reading all physical volumes.  This may take a while...
Activating logical volumes
  Volume group "VolGroup01" not found
Creating root device.
Mounting root filesystem.
mount: could not find filesystem '/dev/root'
Setting up other filesystems.
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys

switchroot: mount failed: No such file or directory

Kernel panic - not syncing: Attempted to kill init!

On Wed, Jul 14, 2010 at 2:33 PM, Cristian Colombo <lu3ecc@xxxxxxxxx> wrote:

With that information is impossible to know where the problem is.

You should send the config files, partitions, etc.

Cristian.

2010/7/14 Alex Edwards <edwards.alex@xxxxxxxxx>

hello again!

right im trying to boot a guest cloned from the host os.
I have followed the instructions in the wiki
I am getting switchroot: mount failed: No such file or directory

i have created a new ramdisk and my config file points to it, are there things other than scsi drivers that cause this issue?

thanks
ALex

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