Integrating with Kolla

This guide describes how to integrate with Kolla. The main integration path is via docker-compose using docker-compose YML files. Each container set has a common YML and associated openstack.env. The openstack.env file describes the command line environment to pass to the docker-compose yml files.

Why integrate with Kolla?

Integrating with Kolla takes a hard part of managing an OpenStack system, specifically managing the container images, and places the burden on a third party project. We strive to do an excellent job of providing world-class OpenStack containers at least as a reference architecture, and possibly as what may be desirable to deploy into live production.

Docker Command Line Arguments

Every container set YML file includes the necessary docker CLI operations needed to launch the container in a tidy YML file. Instead of guessing which set of command line operations are needed per container, the docker-compose YML file can be used directly and will pass the appropriate command line values to the container on container start.

The parameterized docker features used by kolla are:

--pid=host
--net=host
-v host:container
--privileged

These parameterized features are not exposed to the user. Instead they are executed via docker-compose.

Environment Variables

Rather then document which individual containers require specific configuration variables, Kolla integration requires passing all configuration variables to all containers. This allows a simple method of ensuring every type of node (controller, storage, compute) receives the same configuration.

Environment Variable KEY/VALUE pairs

ADMIN_USER_PASSWORD=<steakfordinner> - The admin user password
ADMIN_TENANT_NAME=<admin> - tenant name
FLAT_INTERFACE=<eth1> - nova networking flat interface device name
GLANCE_API_SERVICE_HOST=<IP> - address where glance API is running>
GLANCE_DB_NAME=<glance> - DB name of glance service
GLANCE_DB_PASSWORD=<password> - <Glance DB password>
GLANCE_DB_USER=<glance> - User name of glance in the database
GLANCE_KEYSTONE_PASSWORD=<password> - Keystone DB password
GLANCE_KEYSTONE_USER=<keystone> - Glance Keystone User
GLANCE_REGISTRY_SERVICE_HOST=<glance IP> Glance registry service host
KEYSTONE_ADMIN_PASSWORD=<password>
KEYSTONE_ADMIN_SERVICE_HOST=<IP> - IP Address of Keystone Host
KEYSTONE_ADMIN_SERVICE_PORT=<5000> - Port where Keystone operates
KEYSTONE_ADMIN_TOKEN=<keystone-secret> - A token used to access Keystone
KEYSTONE_AUTH_PROTOCOL=<http> - The keystone authentication protocol
KEYSTONE_DB_PASSWORD=<password> - The password used to access Keystone in the DB
KEYSTONE_PUBLIC_SERVICE_HOST=<IP> - The IP address where Keystone is running
MARIADB_ROOT_PASSWORD=<mariadb root password> - defines the MariaDB root password
MARIADB_SERVICE_HOST=<IP> - The IP Address where Mariadb is running
NETWORK_MANAGER=<nova|neutron> - Use Nova or Neutron networking
NOVA_API_SERVICE_HOST=<IP> - The IP Address where the Nova API Service is hosted
METADATA_HOST=<IP> - The IP address of the Nova Metadata service
ENABLED_APIS=<ec2,osapi_compute,metadata> - Enabled Nova API services.
NOVA_DB_NAME=<nova> - The name of the nova entry in the database
NOVA_DB_PASSWORD=<password> - The password used to access nova
NOVA_DB_USER=<nova> - The name of the nova DB password
NOVA_EC2_API_SERVICE_HOST=<IP> - The IP Address where the Nova EC2 API is hosted
arn't these two the same?
NOVA_EC2_SERVICE_HOST=<IP> _ The IP Address where the Nova EC2 service is hosted
NOVA_KEYSTONE_PASSWORD=<password> - The Nova keystone password
NOVA_KEYSTONE_USER=<nova> - The Nova keystone username
HEAT_DB_NAME=<heat> - The heat DB name
HEAT_DB_PASSWORD=<kolla> - The heat db password
HEAT_KEYSTONE_PASSWORD=<heat> - The keystone password for the heat user
HEAT_API_SERVICE_HOST=<IP> - The IP Address where the Heat API service is hosted
HEAT_API_CFN_SERVICE_HOST=<IP> - The IP Address where Heat will contact the heat-engine in search for meta data
PUBLIC_INTERFACE=<eth1> - The nova public interface
PUBLIC_IP=<Host IP Address> - The IP Address of this host
RABBITMQ_PASS=<rabbit> - The rabbitmq password used to join AMQP
RABBITMQ_SERVICE_HOST=<IP> - The IP Address where the Rabbit service is running
RABBITMQ_USER=<rabbit> - The RabbitMQ user name
RABBIT_PASSWORD=<password> - The RabbitMQ password
RABBIT_USERID=<rabbit> - The RabbitMQ user id on the host

Minimum environment variable setup guide.

Launching a container set

Pick out a simple container set and launch it as follows:

$ docker-compose -f compose/rabbitmq.yml up -d

The third party deployment engine should launch the appropriate containers for the appropriate nodes. Note the rabbitmq.yml used in the example above expects an openstack.env file present in the current working directory. This file will be passed as environment data to the container and configure the container appropriately.

Conclusion

Integrating with Kolla is as sample as creating an openstack.env file, having a deployment tool write the openstack.env file and .yml files to the nodes are targeted for deployment, and running docker-compose as described in the above documentation.

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