abe513cc90
This patch merges all the tox linters testenv into one. It also installs the required Ansible collections with ansible-galaxy before executing ansible-lint. Morever, the 'end-of-file-fixer' pre-commit hook is working again and this patch is fixing all the related issues. Signed-off-by: Gael Chamoulaud (Strider) <gchamoul@redhat.com> Change-Id: Ib823c6c65b4853e951cb001a6eed354ba2127965
74 lines
1.4 KiB
ReStructuredText
74 lines
1.4 KiB
ReStructuredText
===========
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compute_tsx
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===========
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--------------
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About The Role
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--------------
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An Ansible role to verify that the compute nodes have the appropriate TSX flags
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before proceeding with an upgrade.
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``RHEL-8.3`` kernel disabled the **Intel TSX** (Transactional Synchronization
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Extensions) feature by default as a preemptive security measure, but it breaks
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live migration from ``RHEL-7.9`` (or even ``RHEL-8.1`` or ``RHEL-8.2``) to
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``RHEL-8.3``.
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Operators are expected to explicitly define the TSX flag in their KernelArgs for
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the compute role to prevent live-migration issues during the upgrade process.
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This role is intended to be called by tripleo via the kernel deployment
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templates.
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It's also possible to call the role as a standalone.
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This also impacts upstream CentOS systems
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Requirements
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============
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This role needs to be run on an ``Undercloud`` with a deployed ``Overcloud``.
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Dependencies
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============
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No dependencies.
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Example Playbook
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================
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Standard playbook:
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.. code-block:: yaml
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- hosts: nova_libvirt
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roles:
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- { role: compute_tsx}
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Reporting playbook with no failure:
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.. code-block:: yaml
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- hosts: nova_libvirt
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vars:
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- compute_tsx_warning: true
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roles:
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- { role: compute_tsx }
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License
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=======
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Apache
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Author Information
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==================
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**Red Hat TripleO DFG:Compute Squad:Deployment**
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----------------
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Full Description
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----------------
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.. ansibleautoplugin::
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:role: roles/compute_tsx
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