DevOps Intermediate

What is ELK Stack?

A popular log management platform combining Elasticsearch (search), Logstash (processing), and Kibana (visualization).

The ELK Stack collects, processes, stores, and visualizes log data. Logstash (or Filebeat) collects logs from various sources, transforms them, and sends to Elasticsearch for indexing. Kibana provides dashboards and search interfaces.

Modern variants include the Elastic Stack (adding Beats for lightweight data shipping) and alternatives like Grafana Loki (log aggregation optimized for cost). ELK is the standard for centralized logging in enterprise environments.

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Immutable Deployment

A deployment strategy where new versions replace existing instances entirely rather than updating them in place.

An architectural style where an application is composed of small, independent services that communicate over APIs.

Artifact Repository

A centralized storage system for build artifacts like compiled binaries, packages, and container images used in CI/CD pipelines.

Continuous Integration and Continuous Deployment — automated practices for building, testing, and deploying code changes.

Pipeline as Code

Defining CI/CD pipeline configurations as version-controlled code files rather than through UI-based pipeline builders.

SRE (Site Reliability Engineering)

An engineering discipline that applies software engineering principles to infrastructure and operations to create reliable systems.

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