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#cloud-config
# Cloud-init supports the creation of simple partition tables and filesystems
# on devices.
# Default disk definitions for AWS
# --------------------------------
# (Not implemented yet, but provided for future documentation)
disk_setup:
ephemeral0:
table_type: 'mbr'
layout: True
overwrite: False
fs_setup:
- label: None,
filesystem: ext3
device: ephemeral0
partition: auto
# Default disk definitions for Microsoft Azure
# ------------------------------------------
device_aliases: {'ephemeral0': '/dev/sdb'}
disk_setup:
ephemeral0:
table_type: mbr
layout: True
overwrite: False
fs_setup:
- label: ephemeral0
filesystem: ext4
device: ephemeral0.1
replace_fs: ntfs
# Data disks definitions for Microsoft Azure
# ------------------------------------------
disk_setup:
/dev/disk/azure/scsi1/lun0:
table_type: gpt
layout: True
overwrite: True
fs_setup:
- device: /dev/disk/azure/scsi1/lun0
partition: 1
filesystem: ext4
# Default disk definitions for SmartOS
# ------------------------------------
device_aliases: {'ephemeral0': '/dev/vdb'}
disk_setup:
ephemeral0:
table_type: mbr
layout: False
overwrite: False
fs_setup:
- label: ephemeral0
filesystem: ext4
device: ephemeral0.0
# Caveat for SmartOS: if ephemeral disk is not defined, then the disk will
# not be automatically added to the mounts.
# The default definition is used to make sure that the ephemeral storage is
# setup properly.
# "disk_setup": disk partitioning
# --------------------------------
# The disk_setup directive instructs Cloud-init to partition a disk. The format is:
disk_setup:
ephemeral0:
table_type: 'mbr'
layout: true
/dev/xvdh:
table_type: 'mbr'
layout:
- 33
- [33, 82]
- 33
overwrite: True
# The format is a list of dicts of dicts. The first value is the name of the
# device and the subsequent values define how to create and layout the
# partition.
# The general format is:
# disk_setup:
# <DEVICE>:
# table_type: 'mbr'
# layout: <LAYOUT|BOOL>
# overwrite: <BOOL>
#
# Where:
# <DEVICE>: The name of the device. 'ephemeralX' and 'swap' are special
# values which are specific to the cloud. For these devices
# Cloud-init will look up what the real devices is and then
# use it.
#
# For other devices, the kernel device name is used. At this
# time only simply kernel devices are supported, meaning
# that device mapper and other targets may not work.
#
# Note: At this time, there is no handling or setup of
# device mapper targets.
#
# table_type=<TYPE>: Currently the following are supported:
# 'mbr': default and setups a MS-DOS partition table
# 'gpt': setups a GPT partition table
#
# Note: At this time only 'mbr' and 'gpt' partition tables
# are allowed. It is anticipated in the future that
# we'll also have "RAID" to create a mdadm RAID.
#
# layout={...}: The device layout. This is a list of values, with the
# percentage of disk that partition will take.
# Valid options are:
# [<SIZE>, [<SIZE>, <PART_TYPE]]
#
# Where <SIZE> is the _percentage_ of the disk to use, while
# <PART_TYPE> is the numerical value of the partition type.
#
# The following setups two partitions, with the first
# partition having a swap label, taking 1/3 of the disk space
# and the remainder being used as the second partition.
# /dev/xvdh':
# table_type: 'mbr'
# layout:
# - [33,82]
# - 66
# overwrite: True
#
# When layout is "true" it means single partition the entire
# device.
#
# When layout is "false" it means don't partition or ignore
# existing partitioning.
#
# If layout is set to "true" and overwrite is set to "false",
# it will skip partitioning the device without a failure.
#
# overwrite=<BOOL>: This describes whether to ride with safetys on and
# everything holstered.
#
# 'false' is the default, which means that:
# 1. The device will be checked for a partition table
# 2. The device will be checked for a filesystem
# 3. If either a partition of filesystem is found, then
# the operation will be _skipped_.
#
# 'true' is cowboy mode. There are no checks and things are
# done blindly. USE with caution, you can do things you
# really, really don't want to do.
#
#
# fs_setup: Setup the filesystem
# ------------------------------
#
# fs_setup describes the how the filesystems are supposed to look.
fs_setup:
- label: ephemeral0
filesystem: 'ext3'
device: 'ephemeral0'
partition: 'auto'
- label: mylabl2
filesystem: 'ext4'
device: '/dev/xvda1'
- cmd: mkfs -t %(filesystem)s -L %(label)s %(device)s
label: mylabl3
filesystem: 'btrfs'
device: '/dev/xvdh'
# The general format is:
# fs_setup:
# - label: <LABEL>
# filesystem: <FS_TYPE>
# device: <DEVICE>
# partition: <PART_VALUE>
# overwrite: <OVERWRITE>
# replace_fs: <FS_TYPE>
#
# Where:
# <LABEL>: The filesystem label to be used. If set to None, no label is
# used.
#
# <FS_TYPE>: The filesystem type. It is assumed that the there
# will be a "mkfs.<FS_TYPE>" that behaves likes "mkfs". On a standard
# Ubuntu Cloud Image, this means that you have the option of ext{2,3,4},
# and vfat by default.
#
# <DEVICE>: The device name. Special names of 'ephemeralX' or 'swap'
# are allowed and the actual device is acquired from the cloud datasource.
# When using 'ephemeralX' (i.e. ephemeral0), make sure to leave the
# label as 'ephemeralX' otherwise there may be issues with the mounting
# of the ephemeral storage layer.
#
# If you define the device as 'ephemeralX.Y' then Y will be interpetted
# as a partition value. However, ephermalX.0 is the _same_ as ephemeralX.
#
# <PART_VALUE>:
# Partition definitions are overwritten if you use the '<DEVICE>.Y' notation.
#
# The valid options are:
# "auto|any": tell cloud-init not to care whether there is a partition
# or not. Auto will use the first partition that does not contain a
# filesystem already. In the absence of a partition table, it will
# put it directly on the disk.
#
# "auto": If a filesystem that matches the specification in terms of
# label, filesystem and device, then cloud-init will skip the creation
# of the filesystem.
#
# "any": If a filesystem that matches the filesystem type and device,
# then cloud-init will skip the creation of the filesystem.
#
# Devices are selected based on first-detected, starting with partitions
# and then the raw disk. Consider the following:
# NAME FSTYPE LABEL
# xvdb
# |-xvdb1 ext4
# |-xvdb2
# |-xvdb3 btrfs test
# \-xvdb4 ext4 test
#
# If you ask for 'auto', label of 'test, and filesystem of 'ext4'
# then cloud-init will select the 2nd partition, even though there
# is a partition match at the 4th partition.
#
# If you ask for 'any' and a label of 'test', then cloud-init will
# select the 1st partition.
#
# If you ask for 'auto' and don't define label, then cloud-init will
# select the 1st partition.
#
# In general, if you have a specific partition configuration in mind,
# you should define either the device or the partition number. 'auto'
# and 'any' are specifically intended for formatting ephemeral storage
# or for simple schemes.
#
# "none": Put the filesystem directly on the device.
#
# <NUM>: where NUM is the actual partition number.
#
# <OVERWRITE>: Defines whether or not to overwrite any existing
# filesystem.
#
# "true": Indiscriminately destroy any pre-existing filesystem. Use at
# your own peril.
#
# "false": If an existing filesystem exists, skip the creation.
#
# <REPLACE_FS>: This is a special directive, used for Microsoft Azure that
# instructs cloud-init to replace a filesystem of <FS_TYPE>. NOTE:
# unless you define a label, this requires the use of the 'any' partition
# directive.
#
# Behavior Caveat: The default behavior is to _check_ if the filesystem exists.
# If a filesystem matches the specification, then the operation is a no-op.