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#!/usr/bin/env python
# Copyright (c) 2017 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
DOCUMENTATION = '''
---
module: find_kernel
short_description: Look for the system kernel on the filesystem
description:
- We need to find the kernel on non-booted systems, disk images, chroots, etc.
To do this we check /lib/modules and look for the kernel that matches the running
kernle, or failing that we look for the highest-numbered kernel
options:
kernel: starting kernel to check
module_dir: Override kernel module dir, default /lib/modules
'''
LIB_MODULES = "/lib/modules"
def try_int(s, *args):
"""Convert to integer if possible."""
try:
return int(s)
except (TypeError, ValueError):
return args[0] if args else s
def convert_ints(fields, orig):
return tuple((try_int(f) for f in fields)), orig
def main():
module = AnsibleModule(
argument_spec={
'kernel': {'required': True, 'type': 'str'},
'module_dir': {'required': False, 'type': 'str', 'default': LIB_MODULES},
}
)
params = module.params
kernel = params['kernel']
module_dir = params['module_dir']
if os.path.isdir(os.path.join(module_dir, kernel)):
module.exit_json(changed=False, kernel=kernel)
kernel_dirs = os.listdir(module_dir)
kernels = sorted((convert_ints(re.split('[-.]', k), k) for k in kernel_dirs), reverse=True)
try:
newest_kernel = kernels[0][-1]
except IndexError:
module.fail_json(msg="Unable to find kernels in {}".format(module_dir))
if os.path.isdir(os.path.join(module_dir, newest_kernel)):
module.exit_json(changed=False, kernel=newest_kernel)
else:
return kernel
module.fail_json(msg="Unable to kernel other than {}".format(kernel))
# <<INCLUDE_ANSIBLE_MODULE_COMMON>>
from ansible.module_utils.basic import * # noqa
if __name__ == '__main__':
main()
"""
get kernel from uname, ansible_kernel
look for that kernel in /lib/modules
if that kernel doens't exist
sort lib/modules
use latest
parse grub
"""
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