Suscríbase al feed

Why OpenStack High Availability is Important?
Many organizations choose OpenStack for it’s distributed architecture and ability to deliver Infrastructure-as-a-Service environment for scale-out applications to run on top of it, for private on premise clouds or public clouds. It is quite common for OpenStack to run mission critical applications. OpenStack itself is commonly deployed in Controller/Network-Node/Computes layout where the controller runs management services such as nova-scheduler that determines how to dispatch compute resources, and Keystone service that handles authentication and authorization for all services.

Although failure of the controller node would not cause disruption to already running application workloads on top of OpenStack, for organizations running production applications it is critical to provide 99.999% uptime of the control plane of their cloud, and deploy the controller in a highly available configuration so that OpenStack services are accessible at all times and applications can scale-out or scale-in according to workloads.

Address High Availability Needs
Deploying a highly available controller for OpenStack could be achieved in various configurations, each would serve certain set of demands, and introduce growing set of  prerequisites. OpenStack Environment consists of stateless, shared-nothing services that serve their APIs -  Keystone,Glance, Swift, Nova-schedule,Nova-api, Neutron, Horizon, Heat, Ceilometer, etc. - and underlying infrastructure components that OpenStack services use to communicate and save persistent data - MariaDB Database, and a message broker - RabbitMQ - for inter-service communication.

Maintaining OpenStack services’ availability and uptime can be achieved with fairly simple Active/Passive cluster configuration and a virtual IP address forwarding communication to the active node. As the load and demand on OpenStack services grow organizations are interested in the ability to add nodes and scale-out the controller plane. Building a scale-out controller would require setting all services and infrastructure components (database and message broker) in Active/Active configuration and confirming that they are capable to add more nodes to the cluster as load grows, and balancing the API requests load between the nodes.

High Availability Architecture for RHEL-OSP (Red Hat Enterprise Linux OpenStack Platform)
We are heavily investing to provide a fully supported, out of the box, Active/Active high availability solution for OpenStack services and underlying infrastructure components based on mature industry proven open source technologies. In a multi-controller layout services run on all controller nodes in a highly available clustered configuration.

Controller 1_2_3 OpenStack High Availability
OpenStack Platform 5.0 high availability solution uses Pacemaker to construct Active/Active clusters for OpenStack services and HAProxy load balancer. API calls are load balanced through clustered HAProxy in front of the services where every service has it’s own virtual IP(VIP). Such setup makes it easy to customize layouts and segregate services as needed. Galera is used to synchronize the persistent data layer across the running database nodes. Galera is a synchronous multi-master cluster for MariaDB database, handling synchronous replication. This enables an Active/Active scale-out of the database layer without requiring shared storage.

Pacemaker clustered load balancer

Out Of The Box With Foreman Openstack Installer
To make the high availability solution for OpenStack Platform 5.0 extremely easy to consume and setup we are fully integrating it with a project named Staypuft. StayPuft is a Foreman user interface plugin which aims to make it easy to deploy complex production OpenStack deployments. StayPuft will be delivered as part of the Foreman Openstack Installer  for OpenStack Platform 5.0.

Foreman OpenStack Deployment

 

 

 


Sobre el autor

Navegar por canal

automation icon

Automatización

Las últimas novedades en la automatización de la TI para los equipos, la tecnología y los entornos

AI icon

Inteligencia artificial

Descubra las actualizaciones en las plataformas que permiten a los clientes ejecutar cargas de trabajo de inteligecia artificial en cualquier lugar

open hybrid cloud icon

Nube híbrida abierta

Vea como construimos un futuro flexible con la nube híbrida

security icon

Seguridad

Vea las últimas novedades sobre cómo reducimos los riesgos en entornos y tecnologías

edge icon

Edge computing

Conozca las actualizaciones en las plataformas que simplifican las operaciones en el edge

Infrastructure icon

Infraestructura

Vea las últimas novedades sobre la plataforma Linux empresarial líder en el mundo

application development icon

Aplicaciones

Conozca nuestras soluciones para abordar los desafíos más complejos de las aplicaciones

Original series icon

Programas originales

Vea historias divertidas de creadores y líderes en tecnología empresarial