TripleO

TripleO
Name	TripleO
Title	TripleO
Developer	OpenStack Foundation
Released	2013
Programming language	Python
Operating system	Linux
License	Apache License 2.0

TripleO TripleO is a declarative orchestration project originating within the OpenStack Foundation ecosystem designed to provision, upgrade, and manage OpenStack clouds using OpenStack Heat templates and Container-based services. It aims to orchestrate bare metal provisioning through integration with Ironic, configuration management via Ansible or Puppet, and container scheduling with Kubernetes or Docker Swarm patterns. TripleO emphasizes an "OpenStack on OpenStack" model that uses existing OpenStack services such as Keystone, Glance, Neutron, and Nova to manage the control plane for target clouds.

Overview

TripleO was conceived to reduce complexity in deploying large-scale OpenStack installations by treating the cloud control plane as a deployable workload managed by an underlying management cloud. The project ties together projects like Heat, Ironic, Magnum, Ceph, and Mistral to produce automated, repeatable deployments suitable for operators at NASA, CERN, and commercial providers. Development followed the cadence of OpenStack Summit cycles and drew contributors from companies including Red Hat, IBM, Intel, Mirantis, and Canonical.

Architecture

TripleO's architecture separates concerns between a "management" or "undercloud" and a "target" or "overcloud", leveraging Ironic for bare metal, Libvirt or KVM for virtualization, and Ceph for distributed storage. The core orchestration relies on Heat templates and Mistral workflows to define resources and actions; Glance is used for image distribution while Neutron provides networking abstractions including integrations with Open vSwitch, OVN, and hardware Cisco or Arista switches. Authentication and role-based access control are delegated to Keystone, and telemetry can be collected via Ceilometer or Prometheus exporters. High-level design patterns include template composition, service containerization using Podman or Docker, and configuration driven by ConfigDrive or Cloud-Init.

Deployment and Operation

Deployment typically begins with installing an undercloud based on a distribution-backed node running RHEL, CentOS, or Ubuntu Server images, then using TripleO CLI tools to introspect hardware via Ironic Inspector and generate Heat stacks for the overcloud. Networking uses integrated Neutron constructs such as provider networks, VLANs, and SDN plugins to map tenant, provider, and tenant-external networks. Day-two operations—scaling, upgrades, and configuration drift remediation—are handled by redeploying or patching overcloud services as container images (sourced from Docker Hub or registry mirrors) and orchestrating updates through Heat or Ansible playbooks. Monitoring and logging are commonly implemented with Prometheus, Grafana, and ELK Stack components.

Components and Services

Key components integrated into TripleO include Heat for orchestration, Ironic for provisioning, Glance for images, Neutron for networking, Nova for compute lifecycle, Cinder and Ceph RBD for block storage, Swift for object storage, Keystone for identity, and Horizon for dashboard access. Container runtime and image build tooling involve Podman, Buildah, and Dockerfile pipelines, while configuration management can leverage Ansible Tower or Puppet Enterprise for post-deploy customization. Additional services often bundled are Barbican for key management, Heat-Engine variants for scaling orchestration, and Sahara or Magnum for data processing and container orchestration workloads respectively.

Use Cases and Adoption

TripleO has been adopted by research institutions, telecommunications providers, and enterprises seeking repeatable, large-scale OpenStack deployments where vendor neutrality and upstream alignment matter. Notable deployment scenarios include private cloud installations at CERN for scientific workloads, federated cloud infrastructures used by EUDAT participants, and telco edge architectures explored by GSMA members. Operators have used TripleO for cloud migrations, hybrid cloud bridging with OpenStack-based public clouds, and as a platform for NFV testbeds integrating OpenStack and Kubernetes.

Development and Community

The TripleO community has been active within OpenStack project governance, with contributions from vendor engineering teams, academic institutions, and independent operators. Development discussions take place at OpenStack Summit sessions, OpenStack Developer Summit meetups, mailing lists, and project repositories hosted under OpenStack Foundation infrastructure. Release engineering follows OpenStack release cycles and adheres to CI pipelines using Zuul and Gerrit for patch gating. Documentation and onboarding efforts are coordinated through OpenStack Documentation working groups and operator-focused reference architecture repositories.

Security and Reliability

Security posture in TripleO deployments depends on upstream projects like Keystone for authentication, Barbican for secrets, and OpenStack Security advisories for vulnerability management. Hardening practices reference CIS benchmarks for host OS, encrypted transport using TLS certificates issued by operational PKI frameworks, and image signing via Notary or trusted registries. Reliability strategies include multi-controller high-availability patterns, distributed storage with Ceph replication and erasure coding, and backup/restore orchestration using Mistral workflows. Incident response commonly integrates Stackalytics and OpenStack Health metrics to prioritize security patches and rolling upgrades.

Category:OpenStack