community.vmware.vmware_host_hyperthreading module – Enables/Disables Hyperthreading optimization for an ESXi host system

Note

This module is part of the community.vmware collection (version 2.5.0).

You might already have this collection installed if you are using the ansible package. 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.vmware.

To use it in a playbook, specify: community.vmware.vmware_host_hyperthreading.

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

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

aliases: pass, pwd

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.

port

integer

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.

Default: 443

proxy_host

string

Address of a proxy that will receive all HTTPS requests and relay them.

The format is a hostname or a IP.

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

This feature depends on a version of pyvmomi greater than v6.7.1.2018.12

proxy_port

integer

Port of the HTTP proxy that will receive all HTTPS requests and relay them.

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

state

string

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.

Choices:

  • enabled ← (default)

  • disabled

username

aliases: admin, user

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.

validate_certs

boolean

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 true, please make sure Python >= 2.7.9 is installed on the given machine.

Choices:

  • no

  • yes ← (default)

Notes

Note

  • Tested on vSphere 6.5

  • All modules requires API write access and hence is not supported on a free ESXi license.

Examples

- name: Enable Hyperthreading for an host system
  community.vmware.vmware_host_hyperthreading:
    hostname: '{{ vcenter_hostname }}'
    username: '{{ vcenter_username }}'
    password: '{{ vcenter_password }}'
    esxi_hostname: '{{ esxi_hostname }}'
    state: enabled
  delegate_to: localhost

- name: Disable Hyperthreading for an host system
  community.vmware.vmware_host_hyperthreading:
    hostname: '{{ vcenter_hostname }}'
    username: '{{ vcenter_username }}'
    password: '{{ vcenter_password }}'
    esxi_hostname: '{{ esxi_hostname }}'
    state: disabled
  delegate_to: localhost

- name: Disable Hyperthreading for all host systems from cluster
  community.vmware.vmware_host_hyperthreading:
    hostname: '{{ vcenter_hostname }}'
    username: '{{ vcenter_username }}'
    password: '{{ vcenter_password }}'
    cluster_name: '{{ cluster_name }}'
    state: disabled
  delegate_to: localhost

Return Values

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

Key

Description

results

dictionary

metadata about host system’s Hyperthreading configuration

Returned: always

Sample: {“esxi01”: {“msg”: “Hyperthreading is already enabled and active for host \u0027esxi01\u0027”, “state”: “enabled”, “state_current”: “active”}}

Authors

  • Christian Kotte (@ckotte)