Debian Stretch: XEN configure & create DomU HVM Centos part 2

Get centos iso cd
# mkdir iso/
# cd iso
# mkdir centos7
# cd centos7
# wget http://centos.biz.net.id/7/isos/x86_64/CentOS-7-x86_64-NetInstall-1708.iso
Note: you can choose your closest mirror.

Create logical volume for guest
# lvcreate -L300g -n xcentos701-disk volGroup1
  Logical volume "xcentos701-disk" created.

# lvdisplay

  --- Logical volume ---

  LV Path                /dev/volGroup1/xcentos701-disk

  LV Name                xcentos701-disk

  VG Name                volGroup1

  LV UUID                jmP1d1-9xFo-ruio-eEXx-Vkgi-w1Ah-X4tO7B

  LV Write Access        read/write

  LV Creation host, time server, 2017-09-29 02:29:55 +0700

  LV Status              available

  # open                 0

  LV Size                300.00 GiB

  Current LE             76800

  Segments               1

  Allocation             inherit

  Read ahead sectors     auto

  - currently set to     256

  Block device           254:0

Create guest configuration file /etc/xen/xcentos701.cfg
builder = "hvm"
name = "xcentos701"
memory = 8192
vcpus = 4
vif = [ 'mac=00:16:4f:02:02:15, ip=[your_ip], bridge=br0' ]
# Disk Devices
# A list of `diskspec' entries as described in
# docs/misc/xl-disk-configuration.txt
disk = [
  '/dev/volGroup1/xcentos701-disk,raw,xvda,rw',
  'file:/[your_home]/iso/centos7/centos7.iso,xvdc:cdrom,r'
  ]
boot = "dc"
vnc = 1
vnclisten = "[your_ip]"
vncdisplay = 0
vncpasswd = "password"

You need to use any vnc viewer to finish installation. At the end, set root password and reboot. 

If the reboot is stuck, destroy the instance.

# xl destroy xcentos701

You need to remove cdrom from configuration, edit /etc/xen/xcentos701.cfg 

builder = "hvm"

name = "xcentos701"

memory = 8192

vcpus = 4

vif = [ 'mac=00:16:4f:02:02:15, ip=[your_ip], bridge=br0' ]

# Disk Devices

# A list of `diskspec' entries as described in

# docs/misc/xl-disk-configuration.txt

disk = [

  '/dev/volGroup1/xcentos701-disk,raw,xvda,rw'

  ]

boot = "c"

We don't need vnc anymore, so we remove it (comment it out).

Start your guest
# xl create /etc/xen/xcentos701.cfg 

# xl list

Name                                        ID   Mem VCPUs      State   Time(s)

Domain-0                                     0 11815    24     r-----    5001.7

xcentos701                                   1 12288     4     -b----    9315.6

State:

• r - running
• b - blocked
• p - paused
• s - shutdown
• c - crashed
• d - dying

To connect to your guest

# xl console xencentos701

To make your guest start after boot/restart

# mkdir /etc/xen/auto

# ln -s /etc/xen/xcentos701.cfg /etc/xen/auto/xcentos701.cfg

Add user and allow su/sudo
# adduser [your_user]
# usermod -aG wheel [your_user]

References:

1. http://blog.noviantech.com/2010/06/23/debian-kernels-and-tigon-tg3-firmware/
2. https://wiki.debian.org/Firmware
3. https://wiki.debian.org/LVM
4. https://wiki.debian.org/LinuxRaidForAdmins
5. https://ycnrg.org/xen-install-os-from-iso-pv/
6. http://hwraid.le-vert.net/