74 lines
1.4 KiB
ReStructuredText
74 lines
1.4 KiB
ReStructuredText
===========
|
|
compute_tsx
|
|
===========
|
|
|
|
--------------
|
|
About The Role
|
|
--------------
|
|
|
|
An Ansible role to verify that the compute nodes have the appropriate TSX flags
|
|
before proceeding with an upgrade.
|
|
|
|
``RHEL-8.3`` kernel disabled the **Intel TSX** (Transactional Synchronization
|
|
Extensions) feature by default as a preemptive security measure, but it breaks
|
|
live migration from ``RHEL-7.9`` (or even ``RHEL-8.1`` or ``RHEL-8.2``) to
|
|
``RHEL-8.3``.
|
|
|
|
Operators are expected to explicitly define the TSX flag in their KernelArgs for
|
|
the compute role to prevent live-migration issues during the upgrade process.
|
|
|
|
This role is intended to be called by tripleo via the kernel deployment
|
|
templates.
|
|
|
|
It's also possible to call the role as a standalone.
|
|
|
|
This also impacts upstream CentOS systems
|
|
|
|
Requirements
|
|
============
|
|
|
|
This role needs to be run on an ``Undercloud`` with a deployed ``Overcloud``.
|
|
|
|
Dependencies
|
|
============
|
|
|
|
No dependencies.
|
|
|
|
Example Playbook
|
|
================
|
|
|
|
Standard playbook:
|
|
|
|
.. code-block:: yaml
|
|
|
|
- hosts: nova_libvirt
|
|
roles:
|
|
- { role: compute_tsx}
|
|
|
|
Reporting playbook with no failure:
|
|
|
|
.. code-block:: yaml
|
|
|
|
- hosts: nova_libvirt
|
|
vars:
|
|
- compute_tsx_warning: true
|
|
roles:
|
|
- { role: compute_tsx }
|
|
|
|
License
|
|
=======
|
|
|
|
Apache
|
|
|
|
Author Information
|
|
==================
|
|
|
|
**Red Hat TripleO DFG:Compute Squad:Deployment**
|
|
|
|
----------------
|
|
Full Description
|
|
----------------
|
|
|
|
.. ansibleautoplugin::
|
|
:role: roles/compute_tsx
|