horizon/doc/source/topics/settings.rst

Horizon Settings and Configuration

Introduction

Horizon's settings tend to fall into three categories:

• Horizon configuration options (contained in the HORIZON_CONFIG dict) which are not OpenStack-specific and pertain only to the core framework.
• OpenStack-related settings which pertain to other projects/services and are generally prefixed with OPENSTACK_ in the settings file.
• Django settings (including common plugins like django-compressor) which can be (and should be) read about in their respective documentation.

What follows is an overview of the Horizon and OpenStack-specific settings and a few notes on the Django-related settings.

Note

Prior to the Essex release of Horizon there were settings which controlled whether features such as Object Storage/Swift or Networking/Neutron would be enabled in the OpenStack Dashboard. This code has long since been removed and those pre-Essex settings have no impact now.

In Essex and later, the Service Catalog returned by the Identity Service after a user has successfully authenticated determines the dashboards and panels that will be available within the OpenStack Dashboard. If you are not seeing a particular service you expected make sure your Service Catalog is configured correctly.

Horizon Settings

The following options are available in order to configure/customize the behavior of your Horizon installation. All of them are contained in the HORIZON_CONFIG dictionary.

dashboards

2012.1(Essex)

Default: None

Horizon Dashboards are automatically discovered in the following way:

• By traversing Django's list of INSTALLED_APPS and importing any files that have the name "dashboard.py" and include code to register themselves as a Horizon dashboard.
• By adding a configuration file to the openstack_dashboard/local/enabled directory (for more information see pluggable-settings-label).

By default, these dashboards are ordered alphabetically. However, if a list of dashboard slugs is provided in this setting, the supplied ordering is applied to the list of discovered dashboards. If the list of dashboard slugs is shorter than the number of discovered dashboards, the remaining dashboards are appended in alphabetical order.

The dashboards listed must be in a Python module which is included in the INSTALLED_APPS list and on the Python path.

default_dashboard

2012.1(Essex)

Default: None

The slug of the dashboard which should act as the first-run/fallback dashboard whenever a user logs in or is otherwise redirected to an ambiguous location.

user_home

2012.1(Essex)

Default: settings.LOGIN_REDIRECT_URL

This can be either a literal URL path (such as the default), or Python's dotted string notation representing a function which will evaluate what URL a user should be redirected to based on the attributes of that user.

ajax_queue_limit

2012.1(Essex)

Default: 10

The maximum number of simultaneous AJAX connections the dashboard may try to make. This is particularly relevant when monitoring a large number of instances, volumes, etc. which are all actively trying to update/change state.

ajax_poll_interval

2012.1(Essex)

Default: 2500

How frequently resources in transition states should be polled for updates, expressed in milliseconds.

help_url

2012.2(Folsom)

Default: None

If provided, a "Help" link will be displayed in the site header which links to the value of this settings (ideally a URL containing help information).

exceptions

2012.1(Essex)

Default: {'unauthorized': [], 'not_found': [], 'recoverable': []}

A dictionary containing classes of exceptions which Horizon's centralized exception handling should be aware of. Based on these exception categories, Horizon will handle the exception and display a message to the user.

password_validator

2012.1(Essex)

Default: {'regex': '.*', 'help_text': _("Password is not accepted")}

A dictionary containing a regular expression which will be used for password validation and help text which will be displayed if the password does not pass validation. The help text should describe the password requirements if there are any.

This setting allows you to set rules for passwords if your organization requires them.

password_autocomplete

2013.1(Grizzly)

Default: "on"

Controls whether browser autocompletion should be enabled on the login form. Valid values are "on" and "off".

simple_ip_management

2013.1(Grizzly)

Default: True

Enable or disable simplified floating IP address management.

"Simple" floating IP address management means that the user does not ever have to select the specific IP addresses they wish to use, and the process of allocating an IP and assigning it to an instance is one-click.

The "advanced" floating IP management allows users to select the floating IP pool from which the IP should be allocated and to select a specific IP address when associating one with an instance.

Note

Currently "simple" floating IP address management is not compatible with Neutron. There are two reasons for this. First, Neutron does not support the default floating IP pool at the moment. Second, a Neutron floating IP can be associated with each VIF and we need to check whether there is only one VIF for an instance to enable simple association support.

angular_modules

Default: []

A list of AngularJS modules to be loaded when Angular bootstraps. These modules are added as dependencies on the root Horizon application hz.

js_files

Default: []

A list of javascript files to be included in the compressed set of files that are loaded on every page. This is needed for AngularJS modules that are referenced in angular_modules and therefore need to be include in every page.

OpenStack Settings (Partial)

The following settings inform the OpenStack Dashboard of information about the other OpenStack projects which are part of this cloud and control the behavior of specific dashboards, panels, API calls, etc.

Most of the following settings are defined in

openstack_dashboard/local/local_settings.py, which should be copied from openstack_dashboard/local/local_settings.py.example.

API_RESULT_LIMIT

2012.1(Essex)

Default: 1000

The maximum number of objects (e.g. Swift objects or Glance images) to display on a single page before providing a paging element (a "more" link) to paginate results.

API_RESULT_PAGE_SIZE

2012.2(Folsom)

Default: 20

Similar to API_RESULT_LIMIT. This setting currently only controls the Glance image list page size. It will be removed in a future version.

AVAILABLE_REGIONS

2012.1(Essex)

Default: None

A tuple of tuples which define multiple regions. The tuple format is ('http://{{keystone_host}}:5000/v2.0', '{{region_name}}'). If any regions are specified the login form will have a dropdown selector for authenticating to the appropriate region, and there will be a region switcher dropdown in the site header when logged in.

If you do not have multiple regions you should use the OPENSTACK_HOST and OPENSTACK_KEYSTONE_URL settings instead.

CREATE_INSTANCE_FLAVOR_SORT

2013.2(Havana)

Default: {'key':'ram'}

When launching a new instance the default flavor is sorted by RAM usage in ascending order. You can customize the sort order by: id, name, ram, disk and vcpus. Additionally, you can insert any custom callback function, see the description in local_settings.py.example for more information.

This example sorts flavors by vcpus in descending order:

CREATE_INSTANCE_FLAVOR_SORT = {
     'key':'vcpus',
     'reverse': True,
}

FLAVOR_EXTRA_KEYS

2014.1(Icehouse)

Default:

{
    'flavor_keys': [
        ('quota:read_bytes_sec', _('Quota: Read bytes')),
        ('quota:write_bytes_sec', _('Quota: Write bytes')),
        ('quota:cpu_quota', _('Quota: CPU')),
        ('quota:cpu_period', _('Quota: CPU period')),
        ('quota:inbound_average', _('Quota: Inbound average')),
        ('quota:outbound_average', _('Quota: Outbound average'))
    ]
}

Used to customize flavor extra specs keys

IMAGES_LIST_FILTER_TENANTS

2013.1(Grizzly)

Default: None

A list of dictionaries to add optional categories to the image filters in the Images & Snapshots panel, based on project ownership.

Each dictionary should contain a tenant attribute with the project id, and optionally a text attribute specifying the category name, and an icon attribute that displays an icon in the filter button. The icon names are based on the default icon theme provided by Bootstrap.

Example: [{'text': 'Official', 'tenant': '27d0058849da47c896d205e2fc25a5e8', 'icon': 'icon-ok'}]

OPENSTACK_ENABLE_PASSWORD_RETRIEVE

2014.1(Icehouse)

Default: "False"

When set, enables the instance action "Retrieve password" allowing password retrieval from metadata service.

OPENSTACK_ENDPOINT_TYPE

2012.1(Essex)

Default: "publicURL"

A string which specifies the endpoint type to use for the endpoints in the Keystone service catalog. The default value for all services except for identity is "publicURL" . The default value for the identity service is "internalURL".

OPENSTACK_HOST

2012.1(Essex)

Default: "127.0.0.1"

The hostname of the Keystone server used for authentication if you only have one region. This is often the only setting that needs to be set for a basic deployment.

OPENSTACK_HYPERVISOR_FEATURES

2012.2(Folsom)

Default:

{
    'can_set_mount_point': False,
    'can_set_password': False
}

A dictionary containing settings which can be used to identify the capabilities of the hypervisor for Nova.

The Xen Hypervisor has the ability to set the mount point for volumes attached to instances (other Hypervisors currently do not). Setting can_set_mount_point to True will add the option to set the mount point from the UI.

Setting can_set_password to True will enable the option to set an administrator password when launching or rebuilding an instance.

OPENSTACK_IMAGE_BACKEND

2013.2(Havana)

Default:

{
    'image_formats': [
        ('', _('Select format')),
        ('aki', _('AKI - Amazon Kernel Image')),
        ('ami', _('AMI - Amazon Machine Image')),
        ('ari', _('ARI - Amazon Ramdisk Image')),
        ('iso', _('ISO - Optical Disk Image')),
        ('qcow2', _('QCOW2 - QEMU Emulator')),
        ('raw', _('Raw')),
        ('vdi', _('VDI')),
        ('vhd', _('VHD')),
        ('vmdk', _('VMDK'))
    ]
}

Used to customize features related to the image service, such as the list of supported image formats.

OPENSTACK_KEYSTONE_BACKEND

2012.1(Essex)

Default: {'name': 'native', 'can_edit_user': True, 'can_edit_project': True}

A dictionary containing settings which can be used to identify the capabilities of the auth backend for Keystone.

If Keystone has been configured to use LDAP as the auth backend then set can_edit_user and can_edit_project to False and name to "ldap".

OPENSTACK_KEYSTONE_DEFAULT_ROLE

2011.3(Diablo)

Default: "_member_"

The name of the role which will be assigned to a user when added to a project. This name must correspond to a role name in Keystone.

OPENSTACK_KEYSTONE_URL

2011.3(Diablo)

Default: "http://%s:5000/v2.0" % OPENSTACK_HOST

The full URL for the Keystone endpoint used for authentication. Unless you are using HTTPS, running your Keystone server on a nonstandard port, or using a nonstandard URL scheme you shouldn't need to touch this setting.

OPENSTACK_NEUTRON_NETWORK

2013.2(Havana)

Default: {'enable_lb': False}

A dictionary of settings which can be used to enable optional services provided by neutron. Currently only the load balancer service is available.

OPENSTACK_SSL_CACERT

2013.2(Havana)

Default: None

When unset or set to None the default CA certificate on the system is used for SSL verification.

When set with the path to a custom CA certificate file, this overrides use of the default system CA certificate. This custom certificate is used to verify all connections to openstack services when making API calls.

OPENSTACK_SSL_NO_VERIFY

2012.2(Folsom)

Default: False

Disable SSL certificate checks in the OpenStack clients (useful for self-signed certificates).

POLICY_FILES

2013.2(Havana)

Default: {'identity': 'keystone_policy.json', 'compute': 'nova_policy.json'}

This should essentially be the mapping of the contents of POLICY_FILES_PATH to service types. When policy.json files are added to POLICY_FILES_PATH, they should be included here too.

POLICY_FILES_PATH

2013.2(Havana)

Default: os.path.join(ROOT_PATH, "conf")

Specifies where service based policy files are located. These are used to define the policy rules actions are verified against.

SESSION_TIMEOUT

2013.2(Havana)

Default: "1800"

Specifies the timespan in seconds inactivity, until a user is considered as

logged out.

SAHARA_AUTO_IP_ALLOCATION_ENABLED

Default: False

This setting notifies the Data Processing (Sahara) system whether or not automatic IP allocation is enabled. You would want to set this to True if you were running Nova Networking with auto_assign_floating_ip = True.

Django Settings (Partial)

Warning

This is not meant to be anywhere near a complete list of settings for Django. You should always consult the upstream documentation, especially with regards to deployment considerations and security best-practices.

There are a few key settings you should be aware of for development and the most basic of deployments. Further recommendations can be found in the Deploying Horizon section of this documentation.

ALLOWED_HOSTS

2013.2(Havana)

Default: ['localhost']

This list should contain names (or IP addresses) of the host running the dashboard; if it's being accessed via name, the DNS name (and probably short-name) should be added, if it's accessed via IP address, that should be added. The setting may contain more than one entry.

DEBUG and TEMPLATE_DEBUG

2011.2(Cactus)

Default: True

Controls whether unhandled exceptions should generate a generic 500 response or present the user with a pretty-formatted debug information page.

This setting should always be set to False for production deployments as the debug page can display sensitive information to users and attackers alike.

SECRET_KEY

2012.1(Essex)

This should absolutely be set to a unique (and secret) value for your deployment. Unless you are running a load-balancer with multiple Horizon installations behind it, each Horizon instance should have a unique secret key.

The local_settings.py.example file includes a quick-and-easy way to generate a secret key for a single installation.

SECURE_PROXY_SSL_HEADER, CSRF_COOKIE_SECURE and SESSION_COOKIE_SECURE

2013.1(Grizzly)

These three settings should be configured if you are deploying Horizon with SSL. The values indicated in the default local_settings.py.example file are generally safe to use.

Pluggable Settings

Horizon allows dashboards, panels and panel groups to be added without modifying the default settings. Pluggable settings are a mechanism to allow settings to be stored in separate files. Those files are read at startup and used to modify the default settings.

The default location for the dashboard configuration files is openstack_dashboard/enabled, with another directory, openstack_dashboard/local/enabled for local overrides. Both sets of files will be loaded, but the settings in openstack_dashboard/local/enabled will overwrite the default ones. The settings are applied in alphabetical order of the filenames. If the same dashboard has configuration files in enabled and local/enabled, the local name will be used. Note, that since names of python modules can't start with a digit, the files are usually named with a leading underscore and a number, so that you can control their order easily.

Before we describe the specific use cases, the following keys can be used in any pluggable settings file:

ADD_EXCEPTIONS

2014.1(Icehouse)

A dictionary of exception classes to be added to HORIZON['exceptions'].

ADD_INSTALLED_APPS

2014.1(Icehouse)

A list of applications to be prepended to INSTALLED_APPS. This is needed to expose static files from a plugin.

ADD_ANGULAR_MODULES

2014.2(Juno)

A list of AngularJS modules to be loaded when Angular bootstraps. These modules are added as dependencies on the root Horizon application hz.

ADD_JS_FILES

2014.2(Juno)

A list of javascript files to be included in the compressed set of files that are loaded on every page. This is needed for AngularJS modules that are referenced in ADD_ANGULAR_MODULES and therefore need to be included in every page.

DISABLED

2014.1(Icehouse)

If set to True, this settings file will not be added to the settings.

UPDATE_HORIZON_CONFIG

2014.2(Juno)

A dictionary of values that will replace the values in HORIZON_CONFIG.

Pluggable Settings for Dashboards

2014.1(Icehouse)

The following keys are specific to registering a dashboard:

DASHBOARD

2014.1(Icehouse)

The name of the dashboard to be added to HORIZON['dashboards']. Required.

DEFAULT

2014.1(Icehouse)

If set to True, this dashboard will be set as the default dashboard.

Examples

To disable the Router dashboard locally, create a file openstack_dashboard/local/enabled/_40_router.py with the following content:

DASHBOARD = 'router'
DISABLED = True

To add a Tuskar-UI (Infrastructure) dashboard, you have to install it, and then create a file openstack_dashboard/local/enabled/_50_tuskar.py with:

from tuskar_ui import exceptions

DASHBOARD = 'infrastructure'
ADD_INSTALLED_APPS = [
    'tuskar_ui.infrastructure',
]
ADD_EXCEPTIONS = {
    'recoverable': exceptions.RECOVERABLE,
    'not_found': exceptions.NOT_FOUND,
    'unauthorized': exceptions.UNAUTHORIZED,
}

Pluggable Settings for Panels

2014.1(Icehouse)

The following keys are specific to registering or removing a panel:

PANEL

2014.1(Icehouse)

The name of the panel to be added to HORIZON_CONFIG. Required.

PANEL_DASHBOARD

2014.1(Icehouse)

The name of the dashboard the PANEL associated with. Required.

PANEL_GROUP

2014.1(Icehouse)

The name of the panel group the PANEL is associated with. If you want the panel to show up without a panel group, use the panel group "default".

DEFAULT_PANEL

2014.1(Icehouse)

If set, it will update the default panel of the PANEL_DASHBOARD.

ADD_PANEL

2014.1(Icehouse)

Python panel class of the PANEL to be added.

REMOVE_PANEL

2014.1(Icehouse)

If set to True, the PANEL will be removed from PANEL_DASHBOARD/PANEL_GROUP.

Examples

To add a new panel to the Admin panel group in Admin dashboard, create a file openstack_dashboard/local/enabled/_60_admin_add_panel.py with the following content:

PANEL = 'plugin_panel'
PANEL_DASHBOARD = 'admin'
PANEL_GROUP = 'admin'
ADD_PANEL = 'test_panels.plugin_panel.panel.PluginPanel'

To remove Info panel from Admin panel group in Admin dashboard locally, create a file openstack_dashboard/local/enabled/_70_admin_remove_panel.py with the following content:

PANEL = 'info'
PANEL_DASHBOARD = 'admin'
PANEL_GROUP = 'admin'
REMOVE_PANEL = True

To change the default panel of Admin dashboard to Instances panel, create a file openstack_dashboard/local/enabled/_80_admin_default_panel.py with the following content:

PANEL = 'instances'
PANEL_DASHBOARD = 'admin'
PANEL_GROUP = 'admin'
DEFAULT_PANEL = 'instances'

Pluggable Settings for Panel Groups

2014.1(Icehouse)

The following keys are specific to registering a panel group:

PANEL_GROUP

2014.1(Icehouse)

The name of the panel group to be added to HORIZON_CONFIG. Required.

PANEL_GROUP_NAME

2014.1(Icehouse)

The display name of the PANEL_GROUP. Required.

PANEL_GROUP_DASHBOARD

2014.1(Icehouse)

The name of the dashboard the PANEL_GROUP associated with. Required.

Examples

To add a new panel group to the Admin dashboard, create a file openstack_dashboard/local/enabled/_90_admin_add_panel_group.py with the following content:

PANEL_GROUP = 'plugin_panel_group'
PANEL_GROUP_NAME = 'Plugin Panel Group'
PANEL_GROUP_DASHBOARD = 'admin'