The Compute service supports a large number of
configuration options. These options are specified in the
/etc/nova/nova.conf
configuration
file.
The configuration file is in INI file format, with options specified as
key=value
pairs, grouped into
sections. Almost all configuration options are in the
DEFAULT
section. For
example:
[DEFAULT] debug=true verbose=true [trusted_computing] server=10.3.4.2
Each configuration option has an associated type that indicates which values can be set. The supported option types are:
- BoolOpt
Boolean option. Value must be either
true
orfalse
. Example:debug=false
- StrOpt
String option. Value is an arbitrary string. Example:
my_ip=10.0.0.1
- IntOption
Integer option. Value must be an integer. Example:
glance_port=9292
- MultiStrOpt
String option. Same as StrOpt, except that it can be declared multiple times to indicate multiple values. Example:
ldap_dns_servers=dns1.example.org ldap_dns_servers=dns2.example.org
- ListOpt
List option. Value is a list of arbitrary strings separated by commas. Example:
enabled_apis=ec2,osapi_compute,metadata
- FloatOpt
Floating-point option. Value must be a floating-point number. Example:
ram_allocation_ratio=1.5
Important | |
---|---|
Do not specify quotes around Nova options. |
Configuration options are grouped by section. The Compute configuration file supports the following sections.
[DEFAULT]
Contains most configuration options. If the documentation for a configuration option does not specify its section, assume that it appears in this section.
[cells]
Use options in this section to configure cells functionality. For details, see the Cells section (../config-reference/content/section_compute-cells.html) in the OpenStack Configuration Reference.
[baremetal]
Use options in this section to configure the baremetal hypervisor driver.
[conductor]
Use options in this section to configure the
nova-conductor
service.[trusted_computing]
Use options in this section to configure the trusted computing pools functionality and how to connect to a remote attestation service.
The configuration file supports variable substitution.
After you set a configuration option, it can be referenced
in later configuration values when you precede it with
$
. This example defines
my_ip
and then uses
$my_ip
as a
variable:
my_ip=10.2.3.4 glance_host=$my_ip metadata_host=$my_ip
If you need a value to contain the $
symbol, escape it with $$
. For example,
if your LDAP DNS password was $xkj432
,
specify it, as
follows:
ldap_dns_password=$$xkj432
The Compute code uses the Python
string.Template.safe_substitute()
method to implement variable substitution. For more
details on how variable substitution is resolved, see
http://docs.python.org/2/library/string.html#template-strings
and http://www.python.org/dev/peps/pep-0292/.
To include whitespace in a configuration value, use a quoted string. For example:
ldap_dns_passsword='a password with spaces'
All nova-*
services and the nova-manage
command-line client load the configuration file. To define
an alternate location for the configuration file, pass the
--config-file
parameter when you start a /path/to/nova.conf
nova-*
service or call a
nova-manage command.