Note: this guide is obsoleted by the malabar script
The XEN host system here as well as the serving NFS are assumed to be a GNU/Linux, to be able to create sparse disks or partitions (dd seek option and underlying ext4 file-system). One could still imagine using a NetBSD dom0 as long as the guest virtual disk or partition are up and running. This setup could also be adapted to QCOW2 images instead of sparse RAW images or by means of using network block devices instead of vdisks on NFS.
Fetching the to-be-shared material,
rel=8.1
mkdir -p /data/ISO-IMAGES/
cd /data/ISO-IMAGES/
#ftp.ee
wget http://ftp.fr.netbsd.org/pub/NetBSD/iso/$rel/NetBSD-$rel-amd64.iso
wget -O - http://ftp.fr.netbsd.org/pub/NetBSD/iso/$rel/SHA512 | grep amd64.iso > NetBSD-$rel-amd64.iso.SHA512
rm netbsd.iso
ln -s NetBSD-$rel-amd64.iso netbsd.iso
cat *.SHA512
sha512sum *amd64.iso
mkdir -p /data/kernels/netbsd${rel%%\.*}/
cd /data/kernels/netbsd${rel%%\.*}/
rm -f SHA512 netbsd-INSTALL_XEN3_DOMU.gz netbsd-INSTALL_XEN3PAE_DOMU.gz netbsd-XEN3_DOMU.gz netbsd-XEN3PAE_DOMU.gz
wget http://ftp.fr.netbsd.org/pub/NetBSD/NetBSD-$rel/amd64/binary/kernel/netbsd-INSTALL_XEN3_DOMU.gz
wget http://ftp.fr.netbsd.org/pub/NetBSD/NetBSD-$rel/amd64/binary/kernel/netbsd-XEN3_DOMU.gz
wget http://ftp.fr.netbsd.org/pub/NetBSD/NetBSD-$rel/amd64/binary/kernel/SHA512
cat SHA512
sha512sum *.gz
For i386 PAE,
cd /data/kernels/ rm -f SHA512 netbsd-INSTALL_XEN3_DOMU.gz netbsd-INSTALL_XEN3PAE_DOMU.gz netbsd-XEN3_DOMU.gz netbsd-XEN3PAE_DOMU.gz wget http://ftp.fr.netbsd.org/pub/NetBSD/NetBSD-$rel/i386/binary/kernel/netbsd-INSTALL_XEN3PAE_DOMU.gz wget http://ftp.fr.netbsd.org/pub/NetBSD/NetBSD-$rel/i386/binary/kernel/netbsd-XEN3PAE_DOMU.gz wget ftp://ftp.netbsd.org/pub/NetBSD-archive/NetBSD-$rel/i386/binary/kernel/netbsd-INSTALL_XEN3PAE_DOMU.gz wget ftp://ftp.netbsd.org/pub/NetBSD-archive/NetBSD-$rel/i386/binary/kernel/netbsd-XEN3PAE_DOMU.gz
Setting up NetBSD/XEN on EXT2FS vdisk image instead of FFS vdisk image is almost the same. The main difference is that the formating may be done from the dom0, and then BSD partition d should be used.
The FFS vdisk image will however be READ-ONLY by default on most GNU/Linux systems as the CONFIG_UFS_FS_WRITE kernel feature is not compiled in. Fortunately we use to have that additional kernel configuration enabled. It can otherwise be mounted read-write from a FreeBSD rescue system with no specific mount argument.
guest=netbsdffs
#guest=netbsdextfs
mkdir -p /data/guests/$guest
cd /data/guests/$guest
dd if=/dev/zero of=$guest.ffs bs=1000k count=0 seek=5000
#dd if=/dev/zero of=$guest.ext2 bs=1000k count=0 seek=5000
#mkfs.ext2 $guest.ext2
#mkfs.ext2 -O^dir_index,^ext_attr $guest.ext2
#tune2fs -l netbsdextfs.ext2
grep ^proc /proc/cpuinfo | tail -1
cat > $guest <<-EOF
kernel = "/data/kernels/netbsd${rel%%\.*}/netbsd-INSTALL_XEN3_DOMU.gz"
#kernel = "/data/kernels/netbsd${rel%%\.*}/netbsd-XEN3_DOMU.gz"
#root = "xbd0a"
#root = "xbd0d"
memory = 7168
name = "$guest"
vcpus = 16
disk = ['tap:tapdisk:aio:/data/guests/$guest/$guest.ffs,xvda,w',
'tap:tapdisk:aio:/data/ISO-IMAGES/netbsd.iso,xvdb,r']
#disk = ['tap:tapdisk:aio:/data/guests/$guest/$guest.ext2,xvda,w',
vif = [ 'bridge=pubbr0,vifname=$guest.0' ]
EOF
Note. providing the DOS partition xvda1 instead of xvda does not make any difference in contrary to linux guest setups. NetBSD fdisk xbd0 still shows no DOS partition at all and its size remains identical. So I simply stick with xvda.
xl create $guest -c
exit sysinst and proceed
^C #dhclient xennet0 #mount -t nfs x.x.x.x:/data/tftpboot /cdrom dmesg | grep ^xbd fdisk xbd0 disklabel xbd0 newfs /dev/rxbd0a mount /dev/xbd0a /mnt #mount -t ext2fs /dev/xbd0a /mnt #mount -t ext2fs /dev/xbd0d /mnt mkdir /cdrom mount_cd9660 /dev/xbd1a /cdrom cd /cdrom/amd64/binary/sets #cd /cdrom/i386/binary/sets
all sets but x and kern
for set in `ls -1 *.tgz | sed -rn '/^[^xk]/p'`; do
echo -n extracting $set to /mnt...
tar xzphfe $set -C /mnt && echo done
done; unset set
chroot /mnt
cd /dev
./MAKEDEV all
ls -l pty* opty*
./MAKEDEV pty # ./MAKEDEV: pty: unknown device
./MAKEDEV opty
cd /etc
ls -l localtime
ls -l ../usr/share/zoneinfo/Europe/Moscow
ln -sf ../usr/share/zoneinfo/Europe/Moscow localtime
#ln -sf ../usr/share/zoneinfo/Europe/Paris localtime
cat > rc.conf <<EOF
. /etc/defaults/rc.conf
rc_configured=yes
#xen guest
wscons=no
#no dump
no_swap=yes
savecore=no
sshd=yes
EOF
cat /etc/ttys #fine already
vi /etc/fstab
/dev/xbd0a / ffs rw 0 1
#/dev/xbd0d / ext2fs rw 0 1
ptyfs /dev/pts ptyfs rw 0 0
tmpfs /tmp tmpfs rw 0 0
#procfs /proc procfs ro,linux 0 0
chpass -s /bin/ksh root
useradd -D -s /bin/ksh
echo netbsdffs > /etc/myname
#echo netbsdextfs > /etc/myname
echo inet x.x.x.x/xx up > /etc/ifconfig.xennet0
echo x.x.x.x > /etc/mygate
vi /etc/hosts
x.x.x.x netbsdffs
x.x.x.x gw
cat > /etc/resolv.conf <<-EOF
search sne.lan
nameserver x.x.x.x
#nameserver 208.67.222.222
#nameserver 208.67.220.220
EOF
^D
umount /mnt
cd ~/
umount /cdrom
sync
halt -p
You will then be able to mount the thing from the dom0 for templating or maintenance (you might avoid chrooting into it, though),
mkdir lala mount -t ufs -o loop,rw,ufstype=44bsd $guest.ffs lala
If you get this error,
mount: /data/guests/ufs/lala: WARNING: device write-protected, mounted read-only.
==> you did not enable UFS writes in your Linux kernel, but you can still mount it as ro.
guest=GUESTNAME
mkdir -p /data/guests/$guest
cd /data/guests/$guest
dd if=/dev/zero of=$guest.disk bs=1024k count=1 seek=4096
#10GB -- seek=10240
grep ^proc /proc/cpuinfo
cat > $guest <<-EOF
kernel = "/data/kernels/netbsd7/netbsd-INSTALL_XEN3_DOMU.gz"
#kernel = "/data/kernels/netbsd7/netbsd-XEN3_DOMU.gz"
#root = "xbd0a"
memory = 256
name = "$guest"
vcpus = 2
disk = ['tap:tapdisk:aio:/data/guests/$guest/$guest.disk,xvda,w',
'tap:tapdisk:aio:/data/ISO-IMAGES/NetBSD-7.1.2-amd64.iso,xvdb,r']
vif = [ 'vifname=$guest.0' ]
EOF
Launch the installation,
cd /data/guests/$guest/ xl create $guest -c
then install NetBSD on xbd0 using cdrom at xbd1a.
When finished,
x: Exit Install System halt -p
Then switch to the ending production kernel and eventually remove the ISO,
vi $guest kernel = "/data/kernels/netbsd7/netbsd-XEN3_DOMU.gz" root = "xbd0a" #root = "xbd0d"
and eventually remove the vdisk pointing to the ISO.
Start the guest and check,
xl create $guest -c dmesg | grep ^xbd mount
cp -pi /etc/rc.conf /etc/rc.conf.dist vi /etc/rc.conf wscons=no no_swap=yes savecore=no sshd=yes cp -i /etc/ttys /etc/ttys.dist vi /etc/ttys console "/usr/libexec/getty Pc" vt100 on secure ttyE1 "/usr/libexec/getty Pc" wsvt25 off secure ttyE2 "/usr/libexec/getty Pc" wsvt25 off secure ttyE3 "/usr/libexec/getty Pc" wsvt25 off secure
Ref. https://wiki.xenproject.org/wiki/How_to_install_a_NetBSD_PV_domU_on_a_Debian_Squeeze_host_(Xen_4.0.1)
from another guest, say rescue,
disk = ['tap:tapdisk:aio:/data/guests/rescue/rescue.disk,xvda,w',
'tap:tapdisk:aio:/data/guests/sec/sec.disk,xvdb,w',
'tap:tapdisk:aio:/data/guests/netbsd71/NetBSD-7.1.2-amd64.iso,xvdc,r' ]
fsck /dev/rxbd1a
mkdir /lala
mount /dev/xbd1a /lala
See Failover IP
An alternative is to use LVM instead of a sparse file, which makes even more sense on a NetBSD dom0 as the dd seek option is not available. However I am not sure LVM is stable enough on NetBSD and the true value-added pvmove is missing anyway. Maybe another means of managing block devices would be appropriate.
lvm pvcreate /dev/rsd1d lvm vgcreate guestsvg "/dev/rsd1d" lvm lvcreate -n netbsdguest1 -L 5G guestsvg 'phy:/dev/mapper/guestsvg-netbsdguest1,0x03,w', 'file:/root/NetBSD-7.0.1-amd64.iso,0x04,r'
/usr/pkg/share/examples/xen/
xl-disk-configuration - XL Disk Configuration Syntax https://xenbits.xen.org/docs/unstable/man/xl-disk-configuration.5.html
XL DISK CONFIGURATION https://xenbits.xen.org/docs/4.8-testing/misc/xl-disk-configuration.txt
Blktap2 https://wiki.xen.org/wiki/Blktap2
The reality of a XenServer 64 bit dom0
tmpfs fstab example https://wiki.netbsd.org/tutorials/how_to_install_a_server_with_a_root_lfs_partition/
ptyfs fstab example https://wiki.netbsd.org/tutorials/how_to_install_netbsd_on_a_power_macintosh_g4___40__grey__41__/
Xen troubleshooting http://silas.net.br/tech/xen/xen-troubleshooting.html