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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-users] Booting FreeBSD diskless in DomU
Using the 2.0.6 demo cd image, I booted the supplied freebsd image and rsync'd
the file system to an NFS server. However I don not seem to be able to
succesfully boot from it the system just hangs here:
xn0: bpf attached
xn0: Ethernet address: aa:00:00:61:1c:d4
lo0: bpf
I have modified /sbin/start_freebsd.sh and /etc/xen/freebsd.py to generate
the following configuration:
xendemo:~# start_freebsd.sh
Starting new guest domain
Using config file "/etc/xen/freebsd.py".
(vm
(name FreeBSD-69)
(memory 48)
(cpu 69)
(image
(linux
(kernel /boot/freebsd)
(ip 10.0.0.246:10.0.0.19::255.255.255.0::eth0:off)
(root /dev/dns)
(args
'nfsroot=10.0.0.19:/FreeBSD53
,vfs.root.mountfrom=nfs:10.0.0.19:/FreeBSD53,boot_verbose=yes,boot_single=yes'
)
)
)
(device (vif (mac aa:00:00:5b:7a:53)))
)
Is there something I am missing? The bridge seems OK I can access the nfs
exports from the demo cd's default DomUs.
I include my modified files, as I am currently using a fixed IP I have only
been launching one instance of FreeBSD at a time.
xendemo:~# brctl show
bridge name bridge id STP enabled interfaces
xen-br0 8000.00110a543046 no eth0
vif31.0
xendemo:~# ifconfig xen-br0
xen-br0 Link encap:Ethernet HWaddr 00:11:0A:54:30:46
inet addr:10.0.0.237 Bcast:10.255.255.255 Mask:255.0.0.0
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:291944 errors:0 dropped:0 overruns:0 frame:0
TX packets:533910 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:16437710 (15.6 MiB) TX bytes:77603155 (74.0 MiB)
xendemo:~# ping 10.0.0.19
PING 10.0.0.19 (10.0.0.19) 56(84) bytes of data.
64 bytes from 10.0.0.19: icmp_seq=1 ttl=64 time=7.95 ms
64 bytes from 10.0.0.19: icmp_seq=2 ttl=64 time=0.416 ms
64 bytes from 10.0.0.19: icmp_seq=3 ttl=64 time=0.342 ms
new FreeBSD guest domain
# Wait for the user if we're called on a VT
if [ $PPID -eq 1 ] ; then
echo
echo "Press Enter to start a new FreeBSD guest OS"
read
fi
# First it needs an ID
VMID=`/sbin/get_next_vmid.sh`
# Now here we go
echo "Starting new guest domain"
echo
xm create -c -f /etc/xen/freebsd.py \
root=/dev/dns \
name=FreeBSD-$VMID \
kernel=/boot/freebsd \
ip='10.0.0.246' \
netmask='255.255.255.0' \
nfs_server='10.0.0.19' \
nfs_root=/FreeBSD53 \
blkif=no \
netif=no \
memory=48 \
vmid=$VMID
xendemo:~#
xendemo:~# cat /etc/xen/freebsd.py
import xen.util.ip
##### Edit this python file to reflect the configuration of your system
##### This example script expects a variable called 'vmid' to be set.
def config_usage ():
print >>sys.stderr,"""
The config file '%s' requires the following variable to be defined:
vmid -- Numeric identifier for the new domain, used to calculate
the VM's IP address and root partition. E.g. -Dvmid=1
Additionally the following variable may be defined:
image -- Path to kernel image, can be gzip'ed. [/boot/freebsd]
mem -- Memory size. [16]
name -- Domain name. [FreeBSD VM vmid]
ip -- Primary IP address for domain. [this domain's IP + vmid]
nfsserv -- NFS server IP address. [169.254.1.0]
nfsroot -- Path to nfs root filesystem. [/netboot/freebsd]
""" % config_file
# Define script variables here.
# xm_vars is defined automatically, use xm_vars.var() to define a variable.
def vmid_check(var, val):
val = int(val)
if val <= 0:
raise ValueError
return val
xm_vars.var('vmid',
use="Virtual machine id. Integer greater than 0.",
check=vmid_check)
# This checks the script variables.
xm_vars.check()
try:
kernel = kernel
except:
kernel = "/u/kmacy/kernel"
builder='linux' # this is a FreeBSD domain
# STEP 2. The initial memory allocation (in megabytes) for the new domain.
try:
memory = int(mem)
except:
memory = 256
# STEP 3. A handy name for your new domain.
try:
name = name
except:
name = "FreeBSD VM %d" % vmid
# STEP 3A. Which CPU to start domain on?
cpu = vmid # set based on vmid (mod number of CPUs)
# STEP 4. Specify IP address(es), for the new domain. You need to
# configure IP addrs within the domain just as you do normally. This
# is just to let Xen know about them so it can route packets
# appropriately.
#vfr_ipaddr = ["111.222.333.444","222.333.444.555"]
# try:
# vfr_ipaddr = [ip, xenctl.utils.add_offset_to_ip('169.254.1.0',vmid),]
# except:
# vfr_ipaddr =
[xenctl.utils.add_offset_to_ip(xenctl.get_current_ipaddr(),vmid),
# xenctl.utils.add_offset_to_ip('169.254.1.0',vmid),]
#vfr_ipaddr = ["10.56.11.30"];
vfr_ipaddr = ["10.0.0.246"] # xen-vm0
# STEP 5a. Identify any physcial partitions or virtual disks you want the
# domain to have access to, and what you want them accessible as
# e.g. vbd_list = [ ('phy:sda6','sda6', 'w'),
# ('phy:sda%d' % (3+vmid), 'hda2', 'r'),
# ('vd:as73gd784dh','hda1','w'),
# ('phy:cdrom','hdd','r')
#disk = [ 'phy:loopa,loopa,w' ]
# STEP 5b. Set the VBD expertise level. Most people should leave this
# on 0, at least to begin with - this script can detect most dangerous
# disk sharing between domains and with this set to zero it will only
# allow read only sharing.
vbd_expert = 0
# STEP 6. Build the command line for the new domain. Edit as req'd.
# You only need the ip= line if you're NFS booting or the root file system
# doesn't set it later e.g. in ifcfg-eth0 or via DHCP
# You can use 'extrabit' to set the runlevel and custom environment
# variables used by custom rc scripts (e.g. VMID=, usr= )
netmask = xen.util.ip.get_current_ipmask()
gateway = xen.util.ip.get_current_ipgw()
try:
nfsserv
except:
nfsserv = '10.0.0.19'
extra = "boot.netif.ip="+vfr_ipaddr[0]
extra += ",boot.netif.netmask="+netmask
extra = ",vfs.root.mountfrom=nfs:10.0.0.19:/FreeBSD53"
extra += ",boot_verbose=yes"
extra += ",boot_single=yes"
#extra += ",boot_gdb=yes"
#extra += ",boot_gdb_pause=yes"
#cmdline_ip += ",init_path=/sbin:/sbin/init"
# there is no real MAC address - need hack in device driver
# cmdline_ip += ",boot.netif.hwaddr=00:00:00:00:00:00"
# cmdline_ip += ",boot.nfsroot.server="+nfsserv
# try:
# cmdline_ip += ",boot.nfsroot.path="+nfspath
# except:
# cmdline_ip += ",boot.nfsroot.path=/netboot/freebsd"
# something is appending garbage to the end - make sure it is separate
# cmdline_ip += ","
# STEP 7. Set according to whether you want the script to watch the domain
# and auto-restart it should it die or exit.
auto_restart = False
#auto_restart = True
xendemo:~#
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