openstack
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tripleo-docs
Code Issues Proposed changes

Document standalone/UC update Heat stack specifics 

Explain the overcloud vs undercloud/standalone heat stack updates
Document use cases for the --force-stack-update option and how
it can be used with --dry-run and --output-only.
Briefly mention --dry-run and --output-only as well.

Depends-on: I7c7b2bd6d202268fdf4bc08f951ec4c9c4065c08
Related-bug: #1778505

Change-Id: Ie24eaec6871990e38df4e66abe2cc1ea866d9bd9
Signed-off-by: Bogdan Dobrelya <bdobreli@redhat.com>
This commit is contained in:
Bogdan Dobrelya 2018-06-28 15:09:17 +03:00
parent 5373a48f3b
commit e7c8bf345f
4 changed files with 60 additions and 0 deletions
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14
doc/source/install/containers_deployment/standalone.rst
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@ -160,6 +160,20 @@ Deploying a Standalone Keystone node
export OS_CLOUD=standalone
openstack endpoint list
Manual deployments with ansible
-------------------------------
With the ``--output-only`` option enabled, the installation stops before Ansible
playbooks would be normally executed. Instead, it only creates a Heat stack,
then downloads the ansible deployment data and playbooks to ``--output-dir`` for
the manual execution.
.. note::
When updating the existing standalone installation, keep in mind the
special cases described in :ref:`notes-for-stack-updates`. There is an
additional case for the ``--force-stack-update`` flag that might need to be
used, when in the ``--output-only`` mode. That is when you cannot know the
results of the actual deployment before ansible has started.
Example: 1 NIC, Using Compute with Tenant and Provider Networks
---------------------------------------------------------------

4
doc/source/install/installation/updating.rst
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@ -7,6 +7,10 @@ Updating Undercloud Components
:doc:`../containers_deployment/undercloud`
for backward compatibility related information.
.. note::
When updating the existing containerized undercloud installation,
keep in mind the special cases described in :ref:`notes-for-stack-updates`.
#. Before upgrading the undercloud, it is highly suggested to perform
a :doc:`backup <../controlplane_backup_restore/01_undercloud_backup>`
of the undercloud and validate that a restore works fine.

1
doc/source/install/post_deployment/post_deployment.rst
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@ -14,6 +14,7 @@ In this chapter you will find advanced management of various |project| areas.
vm_snapshot
package_update
upgrade
updating-stacks-notes
build_single_image
upload_single_image
update_undercloud_ssh_keys

41
doc/source/install/post_deployment/updating-stacks-notes.rst Normal file
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@ -0,0 +1,41 @@
.. _notes-for-stack-updates:
Understanding undercloud/standalone stack updates
=================================================
To update a service password or a secret when upgrading from a
non-containerized undercloud, you should edit ``undercloud.conf``.
Then you should use the ``openstack undercloud upgrade`` command.
.. note:: ``undercloud.conf`` takes priority over
``tripleo-undercloud-passwords.yaml`` only when running the undercloud
upgrade command. For the undercloud install command, you should edit
``tripleo-undercloud-passwords.yaml`` instead.
In order to apply changes for an existing containerized undercloud or
standalone installation, there is an important thing to remember.
Undercloud and standalone heat installers create one-time ephemeral stacks.
Unlike the normal overcloud stacks, they cannot be updated via the regular
stack update procedure. Instead, the created heat stacks may be updated
virtually. For the most of the cases, the installer will take care of it
automatically via the `StackAction` heat parameter overrides.
You can enforce the virtual update/create of the heat stack via
the ``--force-stack-update`` and ``--force-stack-create`` options.
And the recommended command to apply changes for an existing containerized
undercloud installation is:
.. code-block:: bash
openstack undercloud install --force-stack-update
Otherwise, start a new installation with ``--force-stack-create``. New
passwords will be generated in ``tripleo-undercloud-passwords.yaml``.
It is better to be always explicit.
.. note:: The console log for these operations will always have heat reporting
the STACK_CREATED status. Check the deployment logs for the actual virtual
create or update actions taken.