vmware_host_hyperthreading – Enables/Disables Hyperthreading optimization for an ESXi host system

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Ansible/docs/2.8/modules/vmware host hyperthreading module


vmware_host_hyperthreading – Enables/Disables Hyperthreading optimization for an ESXi host system

New in version 2.8.


Synopsis

  • This module can be used to enable or disable Hyperthreading optimization for ESXi host systems in given vCenter infrastructure.
  • It also checks if Hyperthreading is activated/deactivated and if the host needs to be restarted.
  • The module informs the user if Hyperthreading is enabled but inactive because the processor is vulnerable to L1 Terminal Fault (L1TF).

Requirements

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

  • python >= 2.6
  • PyVmomi

Parameters

Parameter Choices/Defaults Comments

cluster_name

string

Name of the cluster from which all host systems will be used.

This parameter is required if esxi_hostname is not specified.

esxi_hostname

string

Name of the host system to work with.

This parameter is required if cluster_name is not specified.

hostname

string

The hostname or IP address of the vSphere vCenter or ESXi server.

If the value is not specified in the task, the value of environment variable VMWARE_HOST will be used instead.

Environment variable support added in Ansible 2.6.

password

string

The password of the vSphere vCenter or ESXi server.

If the value is not specified in the task, the value of environment variable VMWARE_PASSWORD will be used instead.

Environment variable support added in Ansible 2.6.


aliases: pass, pwd

port

integer

added in 2.5

Default:

443

The port number of the vSphere vCenter or ESXi server.

If the value is not specified in the task, the value of environment variable VMWARE_PORT will be used instead.

Environment variable support added in Ansible 2.6.

state

string

  • enabled

  • disabled

Enable or disable Hyperthreading.

You need to reboot the ESXi host if you change the configuration.

Make sure that Hyperthreading is enabled in the BIOS. Otherwise, it will be enabled, but never activated.

username

string

The username of the vSphere vCenter or ESXi server.

If the value is not specified in the task, the value of environment variable VMWARE_USER will be used instead.

Environment variable support added in Ansible 2.6.


aliases: admin, user

validate_certs

boolean

  • no
  • yes

Allows connection when SSL certificates are not valid. Set to false when certificates are not trusted.

If the value is not specified in the task, the value of environment variable VMWARE_VALIDATE_CERTS will be used instead.

Environment variable support added in Ansible 2.6.

If set to yes, please make sure Python >= 2.7.9 is installed on the given machine.



Notes

Note

  • Tested on vSphere 6.5


Examples

- name: Enable Hyperthreading for an host system
  vmware_host_hyperthreading:
    hostname: '{{ vcenter_hostname }}'
    username: '{{ vcenter_username }}'
    password: '{{ vcenter_password }}'
    esxi_hostname: '{{ esxi_hostname }}'
    state: enabled
    validate_certs: no
  delegate_to: localhost

- name: Disable Hyperthreading for an host system
  vmware_host_hyperthreading:
    hostname: '{{ vcenter_hostname }}'
    username: '{{ vcenter_username }}'
    password: '{{ vcenter_password }}'
    esxi_hostname: '{{ esxi_hostname }}'
    state: disabled
    validate_certs: no
  delegate_to: localhost

- name: Disable Hyperthreading for all host systems from cluster
  vmware_host_hyperthreading:
    hostname: '{{ vcenter_hostname }}'
    username: '{{ vcenter_username }}'
    password: '{{ vcenter_password }}'
    cluster_name: '{{ cluster_name }}'
    state: disabled
    validate_certs: no
  delegate_to: localhost

Return Values

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

Key Returned Description

results

dictionary

always

metadata about host system's Hyperthreading configuration


Sample:

{'esxi01': {'msg': "Hyperthreading is already enabled and active for host 'esxi01'", 'state_current': 'active', 'state': 'enabled'}}




Status

Authors

  • Christian Kotte (@ckotte)

Hint

If you notice any issues in this documentation you can edit this document to improve it.


© 2012–2018 Michael DeHaan
© 2018–2019 Red Hat, Inc.
Licensed under the GNU General Public License version 3.
https://docs.ansible.com/ansible/2.8/modules/vmware_host_hyperthreading_module.html