- Overview - What is the openstacklib module?
- Module Description - What does the module do?
- Setup - The basics of getting started with openstacklib
- Usage - The usage of the openstacklib module
- Implementation - An under-the-hood peek at what the module is doing
- Limitations - OS compatibility, etc.
- Development - Guide for contributing to the module
- Contributors - Those with commits
- Release Notes - Release notes for the project
- Repository - The project source code repository
The openstacklib module is a part of OpenStack, an effort by the Openstack infrastructure team to provide continuous integration testing and code review for Openstack and Openstack community projects not part of the core software. The module itself is used to expose common functionality between Openstack modules as a library that can be utilized to avoid code duplication.
The openstacklib module is a library module for other Openstack modules to utilize. A thorough description will be added later.
This module is tested in combination with other modules needed to build and leverage an entire Openstack software stack.
puppet module install openstack/openstacklib
The db::mysql resource is a library resource that can be used by nova, cinder, ceilometer, etc., to create a mysql database with configurable privileges for a user connecting from defined hosts.
Typically this resource will be declared with a notify parameter to configure the sync command to execute when the database resource is changed.
For example, in heat::db::mysql you might declare:
::openstacklib::db::mysql { 'heat':
password_hash => mysql::password($password),
dbname => $dbname,
user => $user,
host => $host,
charset => $charset,
collate => $collate,
allowed_hosts => $allowed_hosts,
notify => Exec['heat-dbsync'],
}
Some modules should ensure that the database is created before the service is set up. For example, in keystone::db::mysql you would have:
::openstacklib::db::mysql { 'keystone':
password_hash => mysql::password($password),
dbname => $dbname,
user => $user,
host => $host,
charset => $charset,
collate => $collate,
allowed_hosts => $allowed_hosts,
notify => Exec['keystone-manage db_sync'],
before => Service['keystone'],
}
** Parameters for openstacklib::db::mysql: **
#####password_hash
Password hash to use for the database user for this service;
string; required
#####dbname
The name of the database
string; optional; default to the $title of the resource, i.e. 'nova'
#####user
The database user to create;
string; optional; default to the $title of the resource, i.e. 'nova'
#####host
The IP address or hostname of the user in mysql_grant;
string; optional; default to '127.0.0.1'
#####charset
The charset to use for the database;
string; optional; default to 'utf8'
#####collate
The collate to use for the database;
string; optional; default to 'utf8_general_ci'
#####allowed_hosts
Additional hosts that are allowed to access this database;
array or string; optional; default to undef
#####privileges
Privileges given to the database user;
string or array of strings; optional; default to 'ALL'
The db::postgresql resource is a library resource that can be used by nova, cinder, ceilometer, etc., to create a postgresql database and a user with configurable privileges.
Typically this resource will be declared with a notify parameter to configure the sync command to execute when the database resource is changed.
For example, in heat::db::postgresql you might declare:
::openstacklib::db::postgresql { $dbname:
password_hash => postgresql_password($user, $password),
dbname => $dbname,
user => $user,
notify => Exec['heat-dbsync'],
}
Some modules should ensure that the database is created before the service is set up. For example, in keystone::db::postgresql you would have:
::openstacklib::db::postgresql { $dbname:
password_hash => postgresql_password($user, $password),
dbname => $dbname,
user => $user,
notify => Exec['keystone-manage db_sync'],
before => Service['keystone'],
}
** Parameters for openstacklib::db::postgresql: **
#####password_hash
Password hash to use for the database user for this service;
string; required
#####dbname
The name of the database
string; optional; default to the $title of the resource, i.e. 'nova'
#####user
The database user to create;
string; optional; default to the $title of the resource, i.e. 'nova'
#####encoding
The encoding use for the database;
string; optional; default to undef
#####privileges
Privileges given to the database user;
string or array of strings; optional; default to 'ALL'
The service_validation resource is a library resource that can be used by nova, cinder, ceilometer, etc., to validate that a resource is actually up and running.
For example, in nova::api you might declare:
::openstacklib::service_validation { 'nova-api':
command => 'nova list',
}
This defined resource creates an exec-anchor pair where the anchor depends upon the successful exec run.
** Parameters for openstacklib::service_validation: **
#####command
Command to run for validating the service;
string; required
#####service_name
The name of the service to validate;
string; optional; default to the $title of the resource, i.e. 'nova-api'
#####path
The path of the command to validate the service;
string; optional; default to '/usr/bin:/bin:/usr/sbin:/sbin'
#####provider
The provider to use for the exec command;
string; optional; default to 'shell'
#####tries
Number of times to retry validation;
string; optional; default to '10'
#####try_sleep
Number of seconds between validation attempts;
string; optional; default to '2'
It provides an interface to any INI configuration file as they are used in Openstack modules.
You use it like this:
Puppet::Type.type(:<module>_config).provide(
:openstackconfig,
:parent => Puppet::Type.type(:openstack_config).provider(:ini_setting)
) do
It has the standard features of the upstream puppetlabs' inifile
module as it's a direct children of it. Furthermore it can transform
a value with some function of you're choice, enabling you to get value
that get filled at run-time like an uuid.
For an example of how that's working you can have a look at this review
This one has the same basic features as the ini_setting one but the ability to transformation the value. It offers another feature, though. It can parse array. What it enables one to do is to parse this correctly:
[DEFAULT]
conf1 = value1
conf1 = value2
On the opposite side if you put that:
module_config { 'DEFAULT/conf1' : value => ['value1', 'value2'] }
in your manifest, it will properly be written as the example above.
To use this provider you use this:
Puppet::Type.type(:<module>_config).provide(
:openstackconfig,
:parent => Puppet::Type.type(:openstack_config).provider(:ruby)
) do
and define you type with :array_matching => :all. An example of
such provider is nova_config. Have a look for inspiration.
openstacklib is a combination of Puppet manifest and ruby code to delivery configuration and extra functionality through types and providers.
The python-migrate system package for RHEL 6 and below is out of date and may fail to correctly migrate postgresql databases. While this module does not handle database migrations, it is common to set up refresh relationships between openstacklib::db::postgresql resource and the database sync exec resource. Relying on this behavior may cause errors.
Developer documentation for the entire puppet-openstack project.