community.general.pmem module – Configure Intel Optane Persistent Memory modules

Note

This module is part of the community.general collection (version 9.4.0).

It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

To install it, use: ansible-galaxy collection install community.general. You need further requirements to be able to use this module, see Requirements for details.

To use it in a playbook, specify: community.general.pmem.

New in community.general 4.5.0

Synopsis

  • This module allows Configuring Intel Optane Persistent Memory modules (PMem) using ipmctl and ndctl command line tools.

Requirements

The below requirements are needed on the host that executes this module.

  • ipmctl and ndctl command line tools

  • xmltodict

Parameters

Parameter

Comments

appdirect

integer

Percentage of the total capacity to use in AppDirect Mode (0-100).

Create AppDirect capacity utilizing hardware interleaving across the requested PMem modules if applicable given the specified target.

Total of appdirect, memorymode and reserved must be 100

appdirect_interleaved

boolean

Create AppDirect capacity that is interleaved any other PMem modules.

Choices:

  • false

  • true ← (default)

memorymode

integer

Percentage of the total capacity to use in Memory Mode (0-100).

namespace

list / elements=dictionary

This enables to set the configuration for the namespace of the PMem.

mode

string / required

The mode of namespace. The detail of the mode is in the man page of ndctl-create-namespace.

Choices:

  • "raw"

  • "sector"

  • "fsdax"

  • "devdax"

size

string

The size of namespace. This option supports the suffixes k or K or KB for KiB, m or M or MB for MiB, g or G or GB for GiB and t or T or TB for TiB.

This option is required if multiple namespaces are configured.

If this option is not set, all of the available space of a region is configured.

type

string

The type of namespace. The detail of the type is in the man page of ndctl-create-namespace.

Choices:

  • "pmem"

  • "blk"

namespace_append

boolean

Enable to append the new namespaces to the system.

The default is false so the all existing namespaces not listed in namespace are removed.

Choices:

  • false ← (default)

  • true

reserved

integer

Percentage of the capacity to reserve (0-100). reserved will not be mapped into the system physical address space and will be presented as reserved capacity with Show Device and Show Memory Resources Commands.

reserved will be set automatically if this is not configured.

socket

list / elements=dictionary

This enables to set the configuration for each socket by using the socket ID.

Total of appdirect, memorymode and reserved must be 100 within one socket.

appdirect

integer / required

Percentage of the total capacity to use in AppDirect Mode (0-100) within the socket ID.

appdirect_interleaved

boolean

Create AppDirect capacity that is interleaved any other PMem modules within the socket ID.

Choices:

  • false

  • true ← (default)

id

integer / required

The socket ID of the PMem module.

memorymode

integer / required

Percentage of the total capacity to use in Memory Mode (0-100) within the socket ID.

reserved

integer

Percentage of the capacity to reserve (0-100) within the socket ID.

Attributes

Attribute

Support

Description

check_mode

Support: none

Can run in check_mode and return changed status prediction without modifying target.

diff_mode

Support: none

Will return details on what has changed (or possibly needs changing in check_mode), when in diff mode.

Examples

- name: Configure the Pmem as AppDirect 10, Memory Mode 70, and the Reserved 20 percent.
  community.general.pmem:
    appdirect: 10
    memorymode: 70

- name: Configure the Pmem as AppDirect 10, Memory Mode 80, and the Reserved 10 percent.
  community.general.pmem:
    appdirect: 10
    memorymode: 80
    reserved: 10

- name: Configure the Pmem as AppDirect with not interleaved 10, Memory Mode 70, and the Reserved 20 percent.
  community.general.pmem:
    appdirect: 10
    appdirect_interleaved: false
    memorymode: 70

- name: Configure the Pmem each socket.
  community.general.pmem:
    socket:
      - id: 0
        appdirect: 10
        appdirect_interleaved: false
        memorymode: 70
        reserved: 20
      - id: 1
        appdirect: 10
        memorymode: 80
        reserved: 10

- name: Configure the two namespaces.
  community.general.pmem:
    namespace:
      - size: 1GB
        type: pmem
        mode: raw
      - size: 320MB
        type: pmem
        mode: sector

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key

Description

reboot_required

boolean

Indicates that the system reboot is required to complete the PMem configuration.

Returned: success

Sample: true

result

list / elements=dictionary

Shows the value of AppDirect, Memory Mode and Reserved size in bytes.

If socket argument is provided, shows the values in each socket with socket which contains the socket ID.

If namespace argument is provided, shows the detail of each namespace.

Returned: success

Sample: [{"appdirect": 111669149696, "memorymode": 970662608896, "reserved": 3626500096, "socket": 0}, {"appdirect": 111669149696, "memorymode": 970662608896, "reserved": 3626500096, "socket": 1}]

appdirect

integer

AppDirect size in bytes.

Returned: success

memorymode

integer

Memory Mode size in bytes.

Returned: success

namespace

list / elements=string

The list of the detail of namespace.

Returned: success

reserved

integer

Reserved size in bytes.

Returned: success

socket

integer

The socket ID to be configured.

Returned: success

Authors

  • Masayoshi Mizuma (@mizumm)