Add documentation on custom kolla-ansible configuration
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Mark Goddard
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@ -20,8 +20,146 @@ kolla-ansible is installed and executed.
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====================== ================================================== ============================
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``$KOLLA_CONFIG_PATH`` Path on the ansible control host in which ``/etc/kolla``
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the kolla-ansible configuration will be generated.
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These files should not be manually edited.
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``$KOLLA_SOURCE_PATH`` Path on the ansible control host in which ``$PWD/src/kolla-ansible``
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the kolla-ansible source code will be cloned.
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``$KOLLA_VENV_PATH`` Path on the ansible control host in which ``$PWD/venvs/kolla-ansible``
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the kolla-ansible virtualenv will be created.
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====================== ================================================== ============================
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Control Plane Services
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======================
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Kolla-ansible provides a flexible mechanism for configuring the services that
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it deploys. Kayobe adds some commonly required configuration options to the
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defaults provided by kolla-ansible, but also allows for the free-form
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configuration supported by kolla-ansible. The `kolla-ansible documentation
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<https://docs.openstack.org/kolla-ansible/latest/>`_ should be used as a
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reference.
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Global Variables
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----------------
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Kolla-ansible uses a single file for global variables, ``globals.yml``. Kayobe
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provides configuration variables for all required variables and many of the
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most commonly used the variables in this file. Some of these are in
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``$KAYOBE_CONFIG_PATH/kolla.yml``, and others are determined from other sources
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such as the networking configuration in ``$KAYOBE_CONFIG_PATH/networks.yml``.
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Configuring Custom Global Variables
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Additional global configuration may be provided by creating
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``$KAYOBE_CONFIG_PATH/kolla/globals.yml``. Variables in this file will be
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templated using Jinja2, and merged with the Kayobe ``globals.yml``
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configuration.
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.. code-block:: yaml
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:caption: ``$KAYOBE_CONFIG_PATH/kolla/globals.yml``
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---
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# Use a custom tag for the nova-api container image.
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nova_api_tag: v1.2.3
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Passwords
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---------
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Kolla-ansible auto-generates passwords to a file, ``passwords.yml``. Kayobe
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handles the orchestration of this, as well as encryption of the file using an
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ansible vault password specified in the ``KAYOBE_VAULT_PASSWORD`` environment
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variable, if present. The file is generated to
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``$KAYOBE_CONFIG_PATH/kolla/passwords.yml``, and should be stored along with
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other kayobe configuration files. This file should not be manually modified.
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Configuring Custom Passwords
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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In order to write additional passwords to ``passwords.yml``, set the kayobe
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variable ``kolla_ansible_custom_passwords`` in
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``$KAYOBE_CONFIG_PATH/kolla.yml``.
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.. code-block:: yaml
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:caption: ``$KAYOBE_CONFIG_PATH/kolla.yml``
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---
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# Dictionary containing custom passwords to add or override in the Kolla
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# passwords file.
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kolla_ansible_custom_passwords: >
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{{ kolla_ansible_default_custom_passwords |
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combine({'my_custom_password': 'correcthorsebatterystaple'}) }}
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Service Configuration
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---------------------
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Kolla-ansible's flexible configuration is described in the `kolla-ansible
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service configuration documentation
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<https://docs.openstack.org/kolla-ansible/latest/admin/advanced-configuration.html#openstack-service-configuration-in-kolla>`_.
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We won't duplicate that here, but essentially it involves creating files under
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a directory which for users of kayobe will be ``$KOLLA_CONFIG_PATH/config``. In
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kayobe, files in this directory are auto-generated and managed by kayobe.
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Instead, users should create files under ``$KAYOBE_CONFIG_PATH/kolla/config``
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with the same directory structure. These files will be templated using Jinja2,
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merged with kayobe's own configuration, and written out to
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``$KOLLA_CONFIG_PATH/config``.
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The following files, if present, will be templated and provided to
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kolla-ansible. All paths are relative to ``$KAYOBE_CONFIG_PATH/kolla/config``.
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Note that typically kolla-ansible does not use the same wildcard patterns, and
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has a more restricted set of files that it will process. In some cases, it may
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be necessary to inspect the kolla-ansible configuration tasks to determine
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which files are supported.
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.. table: Kolla-ansible configuration files
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=============================== =======================================================
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File Purpose
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=============================== =======================================================
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``ceph/*`` Ceph configuration.
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``glance.conf`` Glance configuration.
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``glance/*`` Extended glance configuration.
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``fluentd/filter`` Fluentd filter configuration.
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``fluentd/output`` Fluentd output configuration.
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``heat.conf`` Heat configuration.
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``heat/*`` Extended heat configuration.
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``horizon/*`` Extended horizon configuration.
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``ironic-inspector.conf`` Ironic inspector configuration.
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``ironic.conf`` Ironic configuration.
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``ironic/*`` Extended ironic configuration.
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``keystone/*`` Extended keystone configuration.
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``magnum.conf`` Magnum configuration.
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``magnum/*`` Extended magnum configuration.
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``manila/*`` Extended manila configuration.
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``murano.conf`` Murano configuration.
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``murano/*`` Extended murano configuration.
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``neutron.conf`` Neutron configuration.
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``neutron/*`` Extended neutron configuration.
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``nova.conf`` Nova configuration.
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``nova/*`` Extended nova configuration.
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``sahara.conf`` Sahara configuration.
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``sahara/*`` Extended sahara configuration.
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``swift/*`` Extended swift configuration.
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=============================== =======================================================
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Configuring an OpenStack Component
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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To provide custom configuration to be applied to all glance services, create
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``$KAYOBE_CONFIG_PATH/kolla/config/glance.conf``. For example:
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.. code-block:: yaml
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:caption: ``$KAYOBE_CONFIG_PATH/kolla/config/glance.conf``
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[DEFAULT]
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api_limit_max = 500
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Configuring an OpenStack Service
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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To provide custom configuration for the glance API service, create
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``$KAYOBE_CONFIG_PATH/kolla/config/glance/glance-api.conf``. For example:
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.. code-block:: yaml
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:caption: ``$KAYOBE_CONFIG_PATH/kolla/config/glance/glance-api.conf``
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[DEFAULT]
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api_limit_max = 500
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