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

Note

This plugin is part of the community.vmware collection (version 1.15.0).

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

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	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': 'enabled', 'state_current': 'active'}}

Authors

Christian Kotte (@ckotte)

© 2012–2018 Michael DeHaan
© 2018–2021 Red Hat, Inc.
Licensed under the GNU General Public License version 3.
https://docs.ansible.com/ansible/latest/collections/community/vmware/vmware_host_hyperthreading_module.html

Docs

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