def virt_builder(base_image, dst_image, commands_file, fail_on_error=True):
"""
Generates an uncompressed disk image
Args:
commands_file (str): Path to the commands file to use
dst_image (str): Path for the newly generated disk image
base_image (str): virt-builder specification, for example 'fedora23',
see virt-builder --list
Returns:
None
"""
cmd = [
'virt-builder',
'--commands-from-file=' + commands_file,
'--output=' + dst_image,
'--format=qcow2',
'-v',
base_image,
]
with LogTask('Running virt-builder on {}'.format(base_image)):
return run_command_with_validation(cmd,
fail_on_error,
msg='Failed to run virt-builder')
def gzip_compress(dst, fail_on_error=True):
cmd = ['gzip', '--best', dst]
with LogTask('Compressing {} with gzip'.format(dst)):
return run_command_with_validation(cmd,
fail_on_error,
msg='Failed to compress with gzip')
def create_layered_image(dst_image, base_image, fail_on_error=True):
"""
Generates an uncompressed layered disk image from the given base one
Args:
dst_image (str): Path for the newly generated disk image
base_image (str): path to the backing file to use
Returns:
None
"""
cmd = [
'qemu-img',
'create',
'-f',
'qcow2',
'-v',
'-b',
base_image,
dst_image,
]
with LogTask('Creating layered image of {}'.format(base_image)):
return run_command_with_validation(
cmd,
fail_on_error,
msg='Failed to create layered image from {}'.format(base_image))
def xz_decompress(dst, fail_on_error=True):
cmd = ['xz', '--threads=0', '--decompress', dst]
with LogTask('Decompressing {} with xz'.format(dst)):
return run_command_with_validation(
cmd,
fail_on_error,
msg='Failed to decompress {} with xz'.format(dst))
def virt_customize(dst_image, commands_file, fail_on_error=True):
cmd = [
'virt-customize',
'--commands-from-file=' + commands_file,
'--format=qcow2',
'-v',
'--add=' + dst_image,
]
with LogTask('Running virt-customize on {}'.format(dst_image)):
return run_command_with_validation(
cmd,
fail_on_error,
msg='Failed to run virt-customize on {}'.format(dst_image))
def virt_sprsify(dst_image, dst_image_format='qcow2', fail_on_error=True):
cmd = [
'virt-sparsify',
'-v',
'-x',
'--format',
dst_image_format,
'--in-place',
dst_image,
]
with LogTask('Running virt-sparsipy on {}'.format(dst_image)):
return run_command_with_validation(
cmd,
fail_on_error,
msg='Failed to run virt-sparsify on {}'.format(dst_image))
def virt_sysprep(dst_image, commands_file=None, fail_on_error=True):
cmd = [
'virt-sysprep',
'--format=qcow2',
'--selinux-relabel',
'-v',
'--add=' + dst_image,
]
if commands_file:
cmd.append('--commands-from-file='.format(commands_file))
with LogTask('Running virt-sysprep on {}'.format(dst_image)):
return run_command_with_validation(
cmd,
fail_on_error,
msg='Failed to run virt-sysprep on {}'.format(dst_image))
def gzip_decompress(dst, fail_on_error=True):
cmd = ['gzip', '--decompress', dst]
with LogTask('Decompressing {} with gzip'):
return run_command_with_validation(
cmd, fail_on_error, msg='Failed to decompress with gzip')