DevOps Glossary · Letter O

Observability
Observability uses logs, metrics, and traces to infer system state and quickly troubleshoot performance and reliability issues.
Monitoring and Logging
On-Premise
Running applications and storing data on company-owned servers, providing direct control over infrastructure, security, and compliance.
Infrastructure Management
OpenSearch
Open-source search and analytics engine that indexes data so you can find and explore it fast, even at huge scale.
Data Management
OpenVPN
OpenVPN is open source VPN software that builds encrypted tunnels between clients and servers to secure network traffic.
Networking
OIDC (OpenID Connect)
OAuth 2.0-based identity layer that lets apps verify who a user is and get basic profile info via standardized tokens.
Authentication and Authorization
OpenTelemetry
OpenTelemetry is an open-source observability framework that standardizes traces, metrics, and logs from app services.
Monitoring and Logging
OpenTelemetry Collector
OpenTelemetry Collector is a component that receives, processes, and exports traces, metrics, and logs.
Observability
OpenTelemetry Trace Context
OpenTelemetry Trace Context is metadata carrying trace IDs across services, linking request spans into a full trace.
Observability
Open Policy Agent (OPA)
Open Policy Agent (OPA) is an open-source policy engine for enforcing code-based rules across APIs and infrastructure.
Security