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authorRoss Brattain <ross.b.brattain@intel.com>2017-09-30 08:06:59 +0000
committerGerrit Code Review <gerrit@opnfv.org>2017-09-30 08:06:59 +0000
commit3b675c32c89e8b4ff3e76397f057deaa0cca8c01 (patch)
treead16692d116f949484852442f6468a0e2c22c392 /ansible/library/parted.py
parent2dd6004f6eace58e97c4aa87b8a80b5f099d9f73 (diff)
parent862546eb151b24c10d26f20bc45ee572679e3d07 (diff)
Merge "replace ansible modules"
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diff --git a/ansible/library/parted.py b/ansible/library/parted.py
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--- a/ansible/library/parted.py
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-#!/usr/bin/python
-# -*- coding: utf-8 -*-
-
-# (c) 2016, Fabrizio Colonna <colofabrix@tin.it>
-#
-# This file is part of Ansible
-#
-# Ansible is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# Ansible is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
-
-ANSIBLE_METADATA = {'metadata_version': '1.0',
- 'status': ['preview'],
- 'supported_by': 'curated'}
-
-
-DOCUMENTATION = '''
----
-author:
- - "Fabrizio Colonna (@ColOfAbRiX)"
-module: parted
-short_description: Configure block device partitions
-version_added: "2.3"
-description:
- - This module allows configuring block device partition using the C(parted)
- command line tool. For a full description of the fields and the options
- check the GNU parted manual.
-notes:
- - When fetching information about a new disk and when the version of parted
- installed on the system is before version 3.1, the module queries the kernel
- through C(/sys/) to obtain disk information. In this case the units CHS and
- CYL are not supported.
-requirements:
- - This module requires parted version 1.8.3 and above.
- - If the version of parted is below 3.1, it requires a Linux version running
- the sysfs file system C(/sys/).
-options:
- device:
- description: The block device (disk) where to operate.
- required: True
- align:
- description: Set alignment for newly created partitions.
- choices: ['none', 'cylinder', 'minimal', 'optimal']
- default: optimal
- number:
- description:
- - The number of the partition to work with or the number of the partition
- that will be created. Required when performing any action on the disk,
- except fetching information.
- unit:
- description:
- - Selects the current default unit that Parted will use to display
- locations and capacities on the disk and to interpret those given by the
- user if they are not suffixed by an unit. When fetching information about
- a disk, it is always recommended to specify a unit.
- choices: [
- 's', 'B', 'KB', 'KiB', 'MB', 'MiB', 'GB', 'GiB', 'TB', 'TiB', '%', 'cyl',
- 'chs', 'compact'
- ]
- default: KiB
- label:
- description: Creates a new disk label.
- choices: [
- 'aix', 'amiga', 'bsd', 'dvh', 'gpt', 'loop', 'mac', 'msdos', 'pc98',
- 'sun', ''
- ]
- default: msdos
- part_type:
- description:
- - Is one of 'primary', 'extended' or 'logical' and may be specified only
- with 'msdos' or 'dvh' partition tables. A name must be specified for a
- 'gpt' partition table. Neither part-type nor name may be used with a
- 'sun' partition table.
- choices: ['primary', 'extended', 'logical']
- part_start:
- description:
- - Where the partition will start as offset from the beginning of the disk,
- that is, the "distance" from the start of the disk. The distance can be
- specified with all the units supported by parted (except compat) and
- it is case sensitive. E.g. C(10GiB), C(15%).
- default: 0%
- part_end :
- description:
- - Where the partition will end as offset from the beginning of the disk,
- that is, the "distance" from the start of the disk. The distance can be
- specified with all the units supported by parted (except compat) and
- it is case sensitive. E.g. C(10GiB), C(15%).
- default: 100%
- name:
- description:
- - Sets the name for the partition number (GPT, Mac, MIPS and PC98 only).
- flags:
- description: A list of the flags that has to be set on the partition.
- state:
- description:
- - If to create or delete a partition. If set to C(info) the module will
- only return the device information.
- choices: ['present', 'absent', 'info']
- default: info
-'''
-
-RETURN = '''
-partition_info:
- description: Current partition information
- returned: success
- type: dict
- contains:
- device:
- description: Generic device information.
- type: dict
- partitions:
- description: List of device partitions.
- type: list
- sample: >
- {
- "disk": {
- "dev": "/dev/sdb",
- "logical_block": 512,
- "model": "VMware Virtual disk",
- "physical_block": 512,
- "size": 5.0,
- "table": "msdos",
- "unit": "gib"
- },
- "partitions": [{
- "begin": 0.0,
- "end": 1.0,
- "flags": ["boot", "lvm"],
- "fstype": null,
- "num": 1,
- "size": 1.0
- }, {
- "begin": 1.0,
- "end": 5.0,
- "flags": [],
- "fstype": null,
- "num": 2,
- "size": 4.0
- }]
- }
-'''
-
-EXAMPLES = """
-# Create a new primary partition
-- parted:
- device: /dev/sdb
- number: 1
- state: present
-
-# Remove partition number 1
-- parted:
- device: /dev/sdb
- number: 1
- state: absent
-
-# Create a new primary partition with a size of 1GiB
-- parted:
- device: /dev/sdb
- number: 1
- state: present
- part_end: 1gib
-
-# Create a new primary partition for LVM
-- parted:
- device: /dev/sdb
- number: 2
- flags: [ lvm ]
- state: present
- part_start: 1gib
-
-# Read device information (always use unit when probing)
-- parted: device=/dev/sdb unit=MiB
- register: sdb_info
-
-# Remove all partitions from disk
-- parted:
- device: /dev/sdb
- number: "{{ item.num }}"
- state: absent
- with_items:
- - "{{ sdb_info.partitions }}"
-"""
-
-
-from ansible.module_utils.basic import AnsibleModule
-import locale
-import math
-import re
-import os
-
-
-# Reference prefixes (International System of Units and IEC)
-units_si = ['B', 'KB', 'MB', 'GB', 'TB']
-units_iec = ['B', 'KiB', 'MiB', 'GiB', 'TiB']
-parted_units = units_si + units_iec + ['s', '%', 'cyl', 'chs', 'compact']
-
-
-def parse_unit(size_str, unit=''):
- """
- Parses a string containing a size of information
- """
- matches = re.search(r'^([\d.]+)([\w%]+)?$', size_str)
- if matches is None:
- # "<cylinder>,<head>,<sector>" format
- matches = re.search(r'^(\d+),(\d+),(\d+)$', size_str)
- if matches is None:
- module.fail_json(
- msg="Error interpreting parted size output: '%s'" % size_str
- )
-
- size = {
- 'cylinder': int(matches.group(1)),
- 'head': int(matches.group(2)),
- 'sector': int(matches.group(3))
- }
- unit = 'chs'
-
- else:
- # Normal format: "<number>[<unit>]"
- if matches.group(2) is not None:
- unit = matches.group(2)
-
- size = float(matches.group(1))
-
- return size, unit
-
-
-def parse_partition_info(parted_output, unit):
- """
- Parses the output of parted and transforms the data into
- a dictionary.
-
- Parted Machine Parseable Output:
- See: https://lists.alioth.debian.org/pipermail/parted-devel/2006-December/00
- 0573.html
- - All lines end with a semicolon (;)
- - The first line indicates the units in which the output is expressed.
- CHS, CYL and BYT stands for CHS, Cylinder and Bytes respectively.
- - The second line is made of disk information in the following format:
- "path":"size":"transport-type":"logical-sector-size":"physical-sector-siz
- e":"partition-table-type":"model-name";
- - If the first line was either CYL or CHS, the next line will contain
- information on no. of cylinders, heads, sectors and cylinder size.
- - Partition information begins from the next line. This is of the format:
- (for BYT)
- "number":"begin":"end":"size":"filesystem-type":"partition-name":"flags-s
- et";
- (for CHS/CYL)
- "number":"begin":"end":"filesystem-type":"partition-name":"flags-set";
- """
- lines = [x for x in parted_output.split('\n') if x.strip() != '']
-
- # Generic device info
- generic_params = lines[1].rstrip(';').split(':')
-
- # The unit is read once, because parted always returns the same unit
- size, unit = parse_unit(generic_params[1], unit)
-
- generic = {
- 'dev': generic_params[0],
- 'size': size,
- 'unit': unit.lower(),
- 'table': generic_params[5],
- 'model': generic_params[6],
- 'logical_block': int(generic_params[3]),
- 'physical_block': int(generic_params[4])
- }
-
- # CYL and CHS have an additional line in the output
- if unit in ['cyl', 'chs']:
- chs_info = lines[2].rstrip(';').split(':')
- cyl_size, cyl_unit = parse_unit(chs_info[3])
- generic['chs_info'] = {
- 'cylinders': int(chs_info[0]),
- 'heads': int(chs_info[1]),
- 'sectors': int(chs_info[2]),
- 'cyl_size': cyl_size,
- 'cyl_size_unit': cyl_unit.lower()
- }
- lines = lines[1:]
-
- parts = []
- for line in lines[2:]:
- part_params = line.rstrip(';').split(':')
-
- # CHS use a different format than BYT, but contrary to what stated by
- # the author, CYL is the same as BYT. I've tested this undocumented
- # behaviour down to parted version 1.8.3, which is the first version
- # that supports the machine parseable output.
- if unit != 'chs':
- size = parse_unit(part_params[3])[0]
- fstype = part_params[4]
- flags = part_params[5]
- else:
- size = ""
- fstype = part_params[3]
- flags = part_params[4]
-
- parts.append({
- 'num': int(part_params[0]),
- 'begin': parse_unit(part_params[1])[0],
- 'end': parse_unit(part_params[2])[0],
- 'size': size,
- 'fstype': fstype,
- 'flags': [f.strip() for f in flags.split(', ') if f != ''],
- 'unit': unit.lower(),
- })
-
- return {'generic': generic, 'partitions': parts}
-
-
-def format_disk_size(size_bytes, unit):
- """
- Formats a size in bytes into a different unit, like parted does. It doesn't
- manage CYL and CHS formats, though.
- This function has been adapted from https://github.com/Distrotech/parted/blo
- b/279d9d869ff472c52b9ec2e180d568f0c99e30b0/libparted/unit.c
- """
- global units_si, units_iec
-
- unit = unit.lower()
-
- # Shortcut
- if size_bytes == 0:
- return 0.0
-
- # Cases where we default to 'compact'
- if unit in ['', 'compact', 'cyl', 'chs']:
- index = max(0, int(
- (math.log10(size_bytes) - 1.0) / 3.0
- ))
- unit = 'b'
- if index < len(units_si):
- unit = units_si[index]
-
- # Find the appropriate multiplier
- multiplier = 1.0
- if unit in units_si:
- multiplier = 1000.0 ** units_si.index(unit)
- elif unit in units_iec:
- multiplier = 1024.0 ** units_iec.index(unit)
-
- output = size_bytes / multiplier * (1 + 1E-16)
-
- # Corrections to round up as per IEEE754 standard
- if output < 10:
- w = output + 0.005
- elif output < 100:
- w = output + 0.05
- else:
- w = output + 0.5
-
- if w < 10:
- precision = 2
- elif w < 100:
- precision = 1
- else:
- precision = 0
-
- # Round and return
- return round(output, precision), unit
-
-
-def get_unlabeled_device_info(device, unit):
- """
- Fetches device information directly from the kernel and it is used when
- parted cannot work because of a missing label. It always returns a 'unknown'
- label.
- """
- device_name = os.path.basename(device)
- base = "/sys/block/%s" % device_name
-
- vendor = read_record(base + "/device/vendor", "Unknown")
- model = read_record(base + "/device/model", "model")
- logic_block = int(read_record(base + "/queue/logical_block_size", 0))
- phys_block = int(read_record(base + "/queue/physical_block_size", 0))
- size_bytes = int(read_record(base + "/size", 0)) * logic_block
-
- size, unit = format_disk_size(size_bytes, unit)
-
- return {
- 'generic': {
- 'dev': device,
- 'table': "unknown",
- 'size': size,
- 'unit': unit,
- 'logical_block': logic_block,
- 'physical_block': phys_block,
- 'model': "%s %s" % (vendor, model),
- },
- 'partitions': []
- }
-
-
-def get_device_info(device, unit):
- """
- Fetches information about a disk and its partitions and it returns a
- dictionary.
- """
- global module
-
- # If parted complains about missing labels, it means there are no partitions.
- # In this case only, use a custom function to fetch information and emulate
- # parted formats for the unit.
- label_needed = check_parted_label(device)
- if label_needed:
- return get_unlabeled_device_info(device, unit)
-
- command = "parted -s -m %s -- unit '%s' print" % (device, unit)
- rc, out, err = module.run_command(command)
- if rc != 0 and 'unrecognised disk label' not in err:
- module.fail_json(msg=(
- "Error while getting device information with parted "
- "script: '%s'" % command),
- rc=rc, out=out, err=err
- )
-
- return parse_partition_info(out, unit)
-
-
-def check_parted_label(device):
- """
- Determines if parted needs a label to complete its duties. Versions prior
- to 3.1 don't return data when there is no label. For more information see:
- http://upstream.rosalinux.ru/changelogs/libparted/3.1/changelog.html
- """
- # Check the version
- parted_major, parted_minor, _ = parted_version()
- if (parted_major == 3 and parted_minor >= 1) or parted_major > 3:
- return False
-
- # Older parted versions return a message in the stdout and RC > 0.
- rc, out, err = module.run_command("parted -s -m %s print" % device)
- if rc != 0 and 'unrecognised disk label' in out.lower():
- return True
-
- return False
-
-
-def parted_version():
- """
- Returns the major and minor version of parted installed on the system.
- """
- global module
-
- rc, out, err = module.run_command("parted --version")
- if rc != 0:
- module.fail_json(
- msg="Failed to get parted version.", rc=rc, out=out, err=err
- )
-
- lines = [x for x in out.split('\n') if x.strip() != '']
- if len(lines) == 0:
- module.fail_json(msg="Failed to get parted version.", rc=0, out=out)
-
- matches = re.search(r'^parted.+(\d+)\.(\d+)(?:\.(\d+))?$', lines[0])
- if matches is None:
- module.fail_json(msg="Failed to get parted version.", rc=0, out=out)
-
- # Convert version to numbers
- major = int(matches.group(1))
- minor = int(matches.group(2))
- rev = 0
- if matches.group(3) is not None:
- rev = int(matches.group(3))
-
- return major, minor, rev
-
-
-def parted(script, device, align):
- """
- Runs a parted script.
- """
- global module
-
- if script and not module.check_mode:
- command = "parted -s -m -a %s %s -- %s" % (align, device, script)
- rc, out, err = module.run_command(command)
-
- if rc != 0:
- module.fail_json(
- msg="Error while running parted script: %s" % command.strip(),
- rc=rc, out=out, err=err
- )
-
-
-def read_record(file_path, default=None):
- """
- Reads the first line of a file and returns it.
- """
- try:
- f = open(file_path, 'r')
- try:
- return f.readline().strip()
- finally:
- f.close()
- except IOError:
- return default
-
-
-def part_exists(partitions, attribute, number):
- """
- Looks if a partition that has a specific value for a specific attribute
- actually exists.
- """
- return any(
- part[attribute] and
- part[attribute] == number for part in partitions
- )
-
-
-def check_size_format(size_str):
- """
- Checks if the input string is an allowed size
- """
- size, unit = parse_unit(size_str)
- return unit in parted_units
-
-
-def main():
- global module, units_si, units_iec
-
- changed = False
- output_script = ""
- script = ""
- module = AnsibleModule(
- argument_spec={
- 'device': {'required': True, 'type': 'str'},
- 'align': {
- 'default': 'optimal',
- 'choices': ['none', 'cylinder', 'minimal', 'optimal'],
- 'type': 'str'
- },
- 'number': {'default': None, 'type': 'int'},
-
- # unit <unit> command
- 'unit': {
- 'default': 'KiB',
- 'choices': parted_units,
- 'type': 'str'
- },
-
- # mklabel <label-type> command
- 'label': {
- 'choices': [
- 'aix', 'amiga', 'bsd', 'dvh', 'gpt', 'loop', 'mac', 'msdos',
- 'pc98', 'sun', ''
- ],
- 'type': 'str'
- },
-
- # mkpart <part-type> [<fs-type>] <start> <end> command
- 'part_type': {
- 'default': 'primary',
- 'choices': ['primary', 'extended', 'logical'],
- 'type': 'str'
- },
- 'part_start': {'default': '0%', 'type': 'str'},
- 'part_end': {'default': '100%', 'type': 'str'},
-
- # name <partition> <name> command
- 'name': {'type': 'str'},
-
- # set <partition> <flag> <state> command
- 'flags': {'type': 'list'},
-
- # rm/mkpart command
- 'state': {
- 'choices': ['present', 'absent', 'info'],
- 'default': 'info',
- 'type': 'str'
- }
- },
- supports_check_mode=True,
- )
-
- # Data extraction
- device = module.params['device']
- align = module.params['align']
- number = module.params['number']
- unit = module.params['unit']
- label = module.params['label']
- part_type = module.params['part_type']
- part_start = module.params['part_start']
- part_end = module.params['part_end']
- name = module.params['name']
- state = module.params['state']
- flags = module.params['flags']
-
- # Conditioning
- if number and number < 0:
- module.fail_json(msg="The partition number must be non negative.")
- if not check_size_format(part_start):
- module.fail_json(
- msg="The argument 'part_start' doesn't respect required format."
- "The size unit is case sensitive.",
- err=parse_unit(part_start)
- )
- if not check_size_format(part_end):
- module.fail_json(
- msg="The argument 'part_end' doesn't respect required format."
- "The size unit is case sensitive.",
- err=parse_unit(part_end)
- )
-
- # Read the current disk information
- current_device = get_device_info(device, unit)
- current_parts = current_device['partitions']
-
- if state == 'present':
- # Default value for the label
- if not current_device['generic']['table'] or \
- current_device['generic']['table'] == 'unknown' and \
- not label:
- label = 'msdos'
-
- # Assign label if required
- if label:
- script += "mklabel %s " % label
-
- # Create partition if required
- if part_type and not part_exists(current_parts, 'num', number):
- script += "mkpart %s %s %s " % (
- part_type,
- part_start,
- part_end
- )
-
- # Set the unit of the run
- if unit and script:
- script = "unit %s %s" % (unit, script)
-
- # Execute the script and update the data structure.
- # This will create the partition for the next steps
- if script:
- output_script += script
- parted(script, device, align)
- changed = True
- script = ""
-
- current_parts = get_device_info(device, unit)['partitions']
-
- if part_exists(current_parts, 'num', number) or module.check_mode:
- partition = {'flags': []} # Empty structure for the check-mode
- if not module.check_mode:
- partition = [p for p in current_parts if p['num'] == number][0]
-
- # Assign name to the the partition
- if name:
- script += "name %s %s " % (number, name)
-
- # Manage flags
- if flags:
- # Compute only the changes in flags status
- flags_off = list(set(partition['flags']) - set(flags))
- flags_on = list(set(flags) - set(partition['flags']))
-
- for f in flags_on:
- script += "set %s %s on " % (number, f)
-
- for f in flags_off:
- script += "set %s %s off " % (number, f)
-
- # Set the unit of the run
- if unit and script:
- script = "unit %s %s" % (unit, script)
-
- # Execute the script
- if script:
- output_script += script
- changed = True
- parted(script, device, align)
-
- elif state == 'absent':
- # Remove the partition
- if part_exists(current_parts, 'num', number) or module.check_mode:
- script = "rm %s " % number
- output_script += script
- changed = True
- parted(script, device, align)
-
- elif state == 'info':
- output_script = "unit '%s' print " % unit
-
- # Final status of the device
- final_device_status = get_device_info(device, unit)
- module.exit_json(
- changed=changed,
- disk=final_device_status['generic'],
- partitions=final_device_status['partitions'],
- script=output_script.strip()
- )
-
-
-if __name__ == '__main__':
- main()