Thank you for the quick response.
Strange way to do this, as libguestfs can do all this.
Sorry to ask this (I'm a newly graduated engineer and I new to the
virtualization world), but how can libguestfs do all of the above?, do you
mean it can create all the partitions inside a new lvm volume or a new raw
image??
Did you copy the syslinux.cfg file into the guest? The error
message
you reported sounds like extlinux is installed but cannot read its
config file.
Yes I'm sure that I copied the syslinux.cfg in the guest and that's why I
was confused with the error message.
My problem is that the exact same steps worked on a ubuntu 14.04 host
with libguestfs 1.24.5 , and I can't see why it won't work on a centos7
host , that's why I thought about a problem with this libguestfs version
(1.30.3).
Here's how I installed extlinux (I already saw the link that you sent me
and I don't think I made a mistake) but the guest still don't want to boot:
[root@localhost libguestfs-1.30.3]# ./run guestfish -i -a
/dev/vm_volumes/clone2
Welcome to guestfish, the guest filesystem shell for
editing virtual machine filesystems and disk images.
Type: 'help' for help on commands
'man' to read the manual
'quit' to quit the shell
Operating system: CentOS Linux release 7.1.1503 (Core)
/dev/sda1 mounted on /
<fs> ls /boot/
.vmlinuz-3.10.0-229.el7.x86_64.hmac
System.map-3.10.0-229.el7.x86_64
config-3.10.0-229.el7.x86_64
grub
grub2
initramfs-0-rescue-c898899928d341b58ae4d02802d19340.img
initramfs-3.10.0-229.el7.x86_64.img
initramfs-3.10.0-229.el7.x86_64kdump.img
initrd-plymouth.img
ldlinux.sys
mbr.bin
symvers-3.10.0-229.el7.x86_64.gz
syslinux.cfg
vmlinuz-0-rescue-c898899928d341b58ae4d02802d19340
vmlinuz-3.10.0-229.el7.x86_64
<fs> cat /boot/syslinux.cfg
DEFAULT linux
LABEL linux
SAY Booting the kernel
KERNEL /boot/vmlinuz-3.10.0-229.el7.x86_64
INITRD /boot/initramfs-3.10.0-229.el7.x86_64.img
APPEND ro root=UUID=8e137cd9-cd6c-4205-a27f-211d6184a5f3
<fs> copy-file-to-device /boot/mbr.bin /dev/sda size:440
<fs> extlinux /boot
<fs> part-set-bootable /dev/sda 1 true
Thank you for your time and understanding.