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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Kubernetes ConfigMap

A Kubernetes object that stores non-sensitive configuration data as key-value pairs, injected into pods as environment variables or files.

Service Discovery

A mechanism that automatically detects and tracks the network locations of service instances in distributed systems.

The ability to understand a system's internal state from its external outputs through metrics, logs, and traces.

Continuous Deployment

A practice where every code change that passes automated tests is automatically deployed to production.

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

An open-source service mesh that provides traffic management, security, and observability for microservices on Kubernetes.

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