| Current File : //lib/python2.7/site-packages/cloudinit/config/cc_disk_setup.pyc |
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Disk Setup
----------
**Summary:** configure partitions and filesystems
This module is able to configure simple partition tables and filesystems.
.. note::
for more detail about configuration options for disk setup, see the disk
setup example
For convenience, aliases can be specified for disks using the
``device_aliases`` config key, which takes a dictionary of alias: path
mappings. There are automatic aliases for ``swap`` and ``ephemeral<X>``, where
``swap`` will always refer to the active swap partition and ``ephemeral<X>``
will refer to the block device of the ephemeral image.
Disk partitioning is done using the ``disk_setup`` directive. This config
directive accepts a dictionary where each key is either a path to a block
device or an alias specified in ``device_aliases``, and each value is the
configuration options for the device. The ``table_type`` option specifies the
partition table type, either ``mbr`` or ``gpt``. The ``layout`` option
specifies how partitions on the device are to be arranged. If ``layout`` is set
to ``true``, a single partition using all the space on the device will be
created. If set to ``false``, no partitions will be created. Partitions can be
specified by providing a list to ``layout``, where each entry in the list is
either a size or a list containing a size and the numerical value for a
partition type. The size for partitions is specified in **percentage** of disk
space, not in bytes (e.g. a size of 33 would take up 1/3 of the disk space).
The ``overwrite`` option controls whether this module tries to be safe about
writing partition talbes or not. If ``overwrite: false`` is set, the device
will be checked for a partition table and for a file system and if either is
found, the operation will be skipped. If ``overwrite: true`` is set, no checks
will be performed.
.. note::
Using ``overwrite: true`` is dangerous and can lead to data loss, so double
check that the correct device has been specified if using this option.
File system configuration is done using the ``fs_setup`` directive. This config
directive accepts a list of filesystem configs. The device to create the
filesystem on may be specified either as a path or as an alias in the format
``<alias name>.<y>`` where ``<y>`` denotes the partition number on the device.
The partition can also be specified by setting ``partition`` to the desired
partition number. The ``partition`` option may also be set to ``auto``, in
which this module will search for the existance of a filesystem matching the
``label``, ``type`` and ``device`` of the ``fs_setup`` entry and will skip
creating the filesystem if one is found. The ``partition`` option may also be
set to ``any``, in which case any file system that matches ``type`` and
``device`` will cause this module to skip filesystem creation for the
``fs_setup`` entry, regardless of ``label`` matching or not. To write a
filesystem directly to a device, use ``partition: none``. A label can be
specified for the filesystem using ``label``, and the filesystem type can be
specified using ``filesystem``.
.. note::
If specifying device using the ``<device name>.<partition number>`` format,
the value of ``partition`` will be overwritten.
.. note::
Using ``overwrite: true`` for filesystems is dangerous and can lead to data
loss, so double check the entry in ``fs_setup``.
.. note::
``replace_fs`` is ignored unless ``partition`` is ``auto`` or ``any``.
**Internal name:** ``cc_disk_setup``
**Module frequency:** per instance
**Supported distros:** all
**Config keys**::
device_aliases:
<alias name>: <device path>
disk_setup:
<alias name/path>:
table_type: <'mbr'/'gpt'>
layout:
- [33,82]
- 66
overwrite: <true/false>
fs_setup:
- label: <label>
filesystem: <filesystem type>
device: <device>
partition: <"auto"/"any"/"none"/<partition number>>
overwrite: <true/false>
replace_fs: <filesystem type>
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See doc/examples/cloud-config-disk-setup.txt for documentation on the
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Returns the key/value pairs of output sent as string
like: FOO='BAR' HOME='127.0.0.1'
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Enumerate the elements of a child device.
Parameters:
device: the kernel device name
nodeps <BOOL>: don't enumerate children devices
Return a dict describing the disk:
type: the entry type, i.e disk or part
fstype: the filesystem type, if it exists
label: file system label, if it exists
name: the device name, i.e. sda
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Return the device type of the device by calling lsblk.
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Check if the device is a valid device.
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Check if the device has a filesystem on it
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Return values are device, label, type, uuid
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Find a device that is either matches the spec, or the first
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fs_type and label.
Note: This works with GPT partition tables!
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Check if the device is currently used. Returns true if the device
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Call the appropriate function.
The first value is the template for function name
The second value is the template replacement
The remain values are passed to the function
For example: get_dyn_func("foo_%s", 'bar', 1, 2, 3,)
would call "foo_bar" with args of 1, 2, 3
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Returns true if the partition layout matches the one on the disk
Layout should be a list of values. At this time, this only
verifies that the number of partitions and their labels is correct.
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See if the partition lay out matches.
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Calculate the layout of the partition table. Partition sizes
are defined as percentage values or a tuple of percentage and
partition type.
For example:
[ 33, [66: 82] ]
Defines the first partition to be a size of 1/3 the disk,
while the remaining 2/3's will be of type Linux Swap.
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Remove parition table entries
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Call the appropriate function for creating the table
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other layouts, simply add a "get_partition_%s_layout"
function.
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Use partprobe instead of 'udevadm'. Partprobe is the only
reliable way to probe the partition table.
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Break out of mbr partition to allow for future partition
types, i.e. gpt
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Fetches the function for creating the table type.
This allows to dynamically find which function to call.
Paramaters:
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device: the device to work on
layout: layout definition specific to partition table
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Creates the partition table.
Parameters:
definition: dictionary describing how to create the partition.
The following are supported values in the dict:
overwrite: Should the partition table be created regardless
of any pre-exisiting data?
layout: the layout of the partition table
table_type: Which partition table to use, defaults to MBR
device: the device to work on.
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Create a file system on the device.
label: defines the label to use on the device
fs_cfg: defines how the filesystem is to look
The following values are required generally:
device: which device or cloud defined default_device
filesystem: which file system type
overwrite: indiscriminately create the file system
partition: when device does not define a partition,
setting this to a number will mean
device + partition. When set to 'auto', the
first free device or the first device which
matches both label and type will be used.
'any' means the first filesystem that matches
on the device.
When 'cmd' is provided then no other parameter is required.
RF R R3 t anyt
filesystemt cmdt
extra_optsRe R� s# Checking %s against default devicess %s%ss% Manual request of partition %s for %ss Checking device %ss0 Device '%s' has check_label='%s' check_fstype=%ss Existing file system found at %ss" Device %s has required file systemNs Destroying filesystem on %ss" Device %s is cleared for formatingt autos, Identifying device to create %s filesytem onR^ Rd s( Automatic device for %s identified as %ss+ Found filesystem match, skipping formating.s* Replacing file system on %s as instructed.sC No device aviable that matches request. Skipping fs creation for %st nones. Using the raw device to place filesystem %s ons( Error in device identification handling.s; File system type '%s' with label '%s' will be created on %ss Device is not known: %ssE No way to create filesystem '{label}'. fs_type or fs_cmd must be set.s8 fs_setup:overwrite ignored because cmd was specified: %ss9 fs_setup:extra_opts ignored because cmd was specified: %ss mkfs.%ss mk%ss. Cannot create fstype '%s'. No mkfs.%s commands -LR( s Creating file system %s on %ss Using cmd: %st shells Failed to exec of '%s':
%s( R� s any( R R RW R� R� R� R� R R R} R` R RM RT Rg R R� R t whicht extendRU RH R� RI ( t fs_cfgRF R R3 R^ t fs_cmdt fs_optst
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(5 t __doc__t cloudinit.settingsR t cloudinitR t loggingR� R: t frequencyR� t UDEVADM_CMDRz R� RG R\ Ro R� R� t getLoggert __name__R R+ R R! R. RB RW RS RU RY R` Rb RT Rg Ri Rn Rs R� R� R� R� R� R� R� R� Ry R� R� R� R� R R� R" ( ( ( sB /usr/lib/python2.7/site-packages/cloudinit/config/cc_disk_setup.pyt <module>b sZ
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+ 0
& ( # 4
A