ceph-ansible

ceph-ansible
Name	ceph-ansible
Developer	Red Hat
Released	2014
Programming language	Ansible, YAML, Python
Operating system	Linux distributions
License	GNU GPLv3

ceph-ansible

ceph-ansible is an Ansible-based orchestration project used to deploy and manage Red Hat Ceph storage clusters. It provides playbooks and roles that integrate with configuration management tools and system utilities to automate installation, configuration, scaling, and upgrade workflows on Linux hosts. The project bridges upstream Ceph development, enterprise distributions, and orchestration practices used by organizations such as SUSE, Canonical, and Docker, Inc..

Overview

ceph-ansible was created to codify deployment patterns for Ceph across diverse environments, aligning with release engineering practices from projects like OpenStack, Kubernetes, and OpenShift. It leverages Ansible modules and inventories to express idempotent state changes and to interface with package managers such as RPM Package Manager and APT (software), as well as container runtimes like Docker and Podman. The repository collaborates with continuous integration systems akin to Jenkins and Zuul and tracks compatibility matrices similar to Semantic Versioning and LTS (software). Its role-based structure echoes configuration approaches used by Puppet and Chef while integrating monitoring stacks such as Prometheus, Grafana Labs, and log aggregation via Elasticsearch and Fluentd.

Architecture and Components

The project is organized into Ansible roles, playbooks, inventory files, and default variable sets. Key components include roles for monitor daemons, manager daemons, object storage daemons, metadata servers, and client configuration—concepts that map to upstream Ceph components and to storage abstractions used by RADOS and RBD. The codebase interconnects with orchestration APIs similar to systemd units, network configuration tools like Netplan and NetworkManager, and service discovery approaches used in Consul and etcd. For containerized deployments it integrates with orchestration layers such as Kubernetes, OpenShift, and CRI-O, and uses Ansible collections in the manner of Ansible Galaxy and Galaxy Project packaging.

Installation and Configuration

Installing ceph-ansible requires preparing an inventory that enumerates hosts for roles corresponding to monitor, OSD, MDS, RGW, and manager processes, reflecting topology planning practices used by Red Hat and SUSE. Configuration is performed through YAML variable files that override defaults, adopting patterns from YAML-based projects including Docker Compose and Kubernetes Helm charts. Package installation is compatible with distributions maintained by Debian, Ubuntu, CentOS, and Fedora, and may rely on repositories hosted by Ceph Foundation and vendor portals like Red Hat Customer Portal. Security configuration integrates with key management and TLS tooling such as OpenSSL, HashiCorp Vault, and system identity services like FreeIPA.

Deployment Scenarios and Playbooks

ceph-ansible ships example playbooks and role compositions to support use cases from single-site clusters to geographically dispersed RADOS federations. Common scenarios include block storage for OpenStack, object storage for Swift-compatible services, and persistent volumes for Kubernetes via the RBD provisioner, paralleling deployment guides from Canonical and SUSE. Playbooks can orchestrate rolling upgrades consistent with strategies from Blue–green deployment and Canary release patterns, and integrate with CI/CD pipelines run on systems like GitLab and Travis CI for automated testing. For cloud environments the project includes patterns for public clouds such as Amazon Web Services, Google Cloud Platform, and Microsoft Azure as well as bare-metal provisioning tools like MAAS and Ironic.

Management, Upgrades, and Troubleshooting

Operational management uses idempotent Ansible runs to apply configuration drift corrections and to perform routine maintenance modeled after practices from Site Reliability Engineering teams at organizations like Netflix and Google. Upgrades rely on documented sequences that mirror upstream Ceph upgrade policies and vendor guidance from Red Hat and SUSE, often coordinating package changes, data reweighting, and OSD orchestration. Troubleshooting workflows reference monitoring alerts from Prometheus, dashboards in Grafana, and logs collected via Elasticsearch/Kibana stacks; incident handling may align with processes formalized by ITIL-influenced teams. Backup and recovery practices connect to snapshotting mechanisms used by Ceph RBD and archival tools from Bacula-like ecosystems.

Community, Development, and Maintenance

The project is maintained by contributors from vendor organizations and independent developers who participate in governance models similar to the Ceph Foundation and collaborative communities such as OpenStack Foundation and Cloud Native Computing Foundation. Development workflows use pull requests and code review conventions found on platforms like GitHub and GitLab, continuous integration pipelines akin to Zuul and Jenkins, and release coordination that cross-references Ceph major and minor releases. Contribution, roadmaps, and security advisories are coordinated with parties including Red Hat, SUSE, Canonical, and the Ceph Foundation, while translation and documentation efforts mirror standards from The Linux Foundation and Free Software Foundation.

Category:Software