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`uan_disk_config`

The uan_disk_config role configures swap and scratch disk partitions on UAN nodes.

Requirements

There must be disk devices found on the UAN node by the device_filter module or this role will exit with failure. This condition can be ignored by setting uan_require_disk to false. See the following list for variable definitions.

See the library/device_filter.py file for more information on this module.

The device that is found will be unmounted if mounted and a swap partition will be created on the first half of the disk. A scratch partition will be created on the second half. ext4 filesystems are created on each partition.

Role Variables

Available variables are in the following list, including default values (see defaults/main.yml):

uan_require_disk

Boolean to determine if this role continues to setup disk if no disks were found by the device filter. Set to true to exit with error when no disks are found.

Example:

uan_require_disk: false

uan_device_name_filter

Regular expression of disk device name for this role to filter. Input to the device_filter module.

Example:

uan_device_name_filter: "^sd[a-f]$"

uan_device_host_filter

Regular expression of host for this role to filter. Input to the device_filter module.

Example:

uan_device_host_filter: "

uan_device_model_filter

Regular expression of the device model for this role to filter. Input to the device_filter module.

Example:

uan_device_model_filter: "

uan_device_vendor_filter

Regular expression of the disk vendor for this role to filter. Input to the device_filter module.

Example:

uan_device_vendor_filter: "

uan_device_size_filter

Regular expression of disk size for this role to filter. Input to the device_filter module.

Example:

uan_device_size_filter: "<1TB"

uan_swap

Filesystem location to mount the swap partition.

Example:

uan_swap: "/swap"

uan_scratch

Filesystem location to mount the scratch partition.

Example:

uan_scratch: "/scratch"

swap_file

Name of the swap file to create. Full path is <uan_swap>/<swapfile>.

Example:

swap_file: "swapfile"

swap_dd_command

dd command to create the swapfile.

Example:

swap_dd_command: "/usr/bin/dd if=/dev/zero of={{ uan_swap }}/{{ swap_file }} bs=1GB count=10"

swap_swappiness

Value to set the swapiness in sysctl.

Example:

swap_swappiness: "10"

Dependencies

library/device_filter.py is required to find eligible disk devices.

Example Playbook

- hosts: Application_UAN
  roles:
      - { role: uan_disk_config }

This role is included in the UAN site.yml play.