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Copyright 2011 OpenStack, LLC
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Licensed under the Apache License, Version 2.0 (the "License"); you may
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http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
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Configuring Glance
==================
In addition to this documentation page, you can check the
``etc/glance.conf.sample`` sample configuration file distributed with Glance
for an example configuration file with detailed comments on what each options
does.
Common Configuration Options in Glance
--------------------------------------
Glance has a few command-line options that are common to all Glance programs:
* ``--verbose``
Optional. Default: ``False``
Can be specified on the command line and in configuration files.
Turns on the INFO level in logging and prints more verbose command-line
interface printouts.
* ``--debug``
Optional. Default: ``False``
Can be specified on the command line and in configuration files.
Turns on the DEBUG level in logging.
* ``--config-file=PATH``
Optional. Default: ``None``
Specified on the command line only.
Takes a path to a configuration file to use when running the program. If this
CLI option is not specified, then we check to see if the first argument is a
file. If it is, then we try to use that as the configuration file. If there is
no file or there were no arguments, we search for a configuration file in the
following order:
- ./glance.conf
- ~/glance.conf
- ~/.glance/glance.conf
- /etc/glance/glance.conf
- /etc/glance.conf
Configuring Logging in Glance
-----------------------------
There are a number of configuration options in Glance that control how Glance
servers log messages. The configuration options can be specified both on the
command line and in the ``glance.conf`` config file.
* ``--log-config=PATH``
Optional. Default: ``None``
Specified on the command line only.
Takes a path to a configuration file to use for configuring logging.
* ``--log-format``
`Because of a bug in the PasteDeploy package, this option is only available
on the command line.`
Optional. Default: ``%(asctime)s %(levelname)8s [%(name)s] %(message)s``
The format of the log records. See the
`logging module <http://docs.python.org/library/logging.html>`_ documentation for
more information on setting this format string.
* ``log_file`` (``--log-file`` when specified on the command line)
The filepath of the file to use for logging messages from Glance's servers. If
missing, the default is to output messages to ``stdout``, so if you are running
Glance servers in a daemon mode (using ``glance-control``) you should make
sure that the ``log_file`` option is set appropriately.
* ``log_dir`` (``--log-dir`` when specified on the command line)
The filepath of the directory to use for log files. If not specified (the default)
the ``log_file`` is used as an absolute filepath.
* ``log_date_format`` (``--log-date-format`` when specified from the command line)
The format string for timestamps in the log output.
Defaults to ``%Y-%m-%d %H:%M:%S``. See the
`logging module <http://docs.python.org/library/logging.html>`_ documentation for
more information on setting this format string.
Configuring Glance Storage Backends
-----------------------------------
There are a number of configuration options in Glance that control how Glance
stores disk images. These configuration options are specified in the
``glance.conf`` config file `in the section [app:glance-api]`.
* ``default_store=STORE``
Optional. Default: ``file``
Can only be specified in configuration files.
Sets the storage backend to use by default when storing images in Glance.
Available options for this option are (``file``, ``swift``, or ``s3``).
* ``filesystem_store_datadir=PATH``
Optional. Default: ``/var/lib/glance/images/``
Can only be specified in configuration files.
`This option is specific to the filesystem storage backend.`
Sets the path where the filesystem storage backend write disk images. Note that
the filesystem storage backend will attempt to create this directory if it does
not exist. Ensure that the user that ``glance-api`` runs under has write
permissions to this directory.
* ``swift_store_auth_address=URL``
Required when using the Swift storage backend.
Can only be specified in configuration files.
`This option is specific to the Swift storage backend.`
Sets the authentication URL supplied to Swift when making calls to its storage
system. For more information about the Swift authentication system, please
see the `Swift auth <http://swift.openstack.org/overview_auth.html>`_
documentation and the
`overview of Swift authentication <http://docs.openstack.org/openstack-object-storage/admin/content/ch02s02.html>`_.
* ``swift_store_user=USER``
Required when using the Swift storage backend.
Can only be specified in configuration files.
`This option is specific to the Swift storage backend.`
Sets the user to authenticate against the ``swift_store_auth_address`` with.
* ``swift_store_key=KEY``
Required when using the Swift storage backend.
Can only be specified in configuration files.
`This option is specific to the Swift storage backend.`
Sets the authentication key to authenticate against the
``swift_store_auth_address`` with for the user ``swift_store_user``.
* ``swift_store_container=CONTAINER``
Optional. Default: ``glance``
Can only be specified in configuration files.
`This option is specific to the Swift storage backend.`
Sets the name of the container to use for Glance images in Swift.
* ``swift_store_create_container_on_put``
Optional. Default: ``False``
Can only be specified in configuration files.
`This option is specific to the Swift storage backend.`
If true, Glance will attempt to create the container ``swift_store_container``
if it does not exist.
Configuring the Glance Registry
-------------------------------
Glance ships with a default, reference implementation registry server. There
are a number of configuration options in Glance that control how this registry
server operates. These configuration options are specified in the
``glance.conf`` config file `in the section [app:glance-registry]`.
* ``sql_connection=CONNECTION_STRING`` (``--sql-connection`` when specified
on command line)
Optional. Default: ``None``
Can be specified in configuration files. Can also be specified on the
command-line for the ``glance-manage`` program.
Sets the SQLAlchemy connection string to use when connecting to the registry
database. Please see the documentation for
`SQLAlchemy connection strings <http://www.sqlalchemy.org/docs/05/reference/sqlalchemy/connections.html>`_
online.
* ``sql_timeout=SECONDS``
on command line)
Optional. Default: ``3600``
Can only be specified in configuration files.
Sets the number of seconds after which SQLAlchemy should reconnect to the
datastore if no activity has been made on the connection.