devops

# DevOps Skills ## Overview DevOps practices for continuous integration, delivery, and operations to enable fast, reliable software delivery. ## DevOps Lifecycle ``` ┌─────────────────────────────────────────────────────────────────┐ │ CONTINUOUS │ │ ┌──────┐ ┌──────┐ ┌──────┐ ┌──────┐ ┌───────┐ │ │ │ Plan │→ │ Code │→ │Build │→ │ Test │→ │Release│ │ │ └──────┘ └──────┘ └──────┘ └──────┘ └───────┘ │ │ ↑ │ │ │ │ INTEGRATION / DELIVERY ↓ │ │ ┌──────┐ ┌───────┐ ┌──────┐ │ │ │Learn │← │Monitor│← │Deploy│ │ │ └──────┘ └───────┘ └──────┘ │ │ OPERATIONS │ └─────────────────────────────────────────────────────────────────┘ ``` ## Categories ### CI/CD - Pipeline fundamentals - GitHub Actions / GitLab CI - Pipeline patterns - Deployment strategies (Blue-Green, Canary) ### Containerization - Docker fundamentals - Docker Compose - Container best practices - Multi-stage builds ### Orchestration - Kubernetes basics - Helm charts - Service mesh - GitOps (ArgoCD, Flux) ### Monitoring - Metrics and SLIs/SLOs - Prometheus & Grafana - Alerting strategies - Dashboard design ### Logging - Structured logging - Log aggregation - ELK/EFK stack - Distributed tracing ### Infrastructure - Infrastructure as Code - Terraform - Cloud patterns - Cost optimization ### Reliability - SRE fundamentals - Incident management - Chaos engineering - Disaster recovery ## DORA Metrics | Metric | Elite | High | Medium | Low | |--------|-------|------|--------|-----| | Deployment Frequency | On-demand | Weekly | Monthly | Yearly | | Lead Time | < 1 day | 1 week | 1 month | > 6 months | | Change Failure Rate | < 15% | 16-30% | 31-45% | > 45% | | MTTR | < 1 hour | < 1 day | < 1 week | > 1 week | ## Skills Index ### CI/CD - [CI/CD Fundamentals](ci-cd/ci-cd-fundamentals.md) - [GitHub Actions](ci-cd/github-actions.md) - [GitLab CI](ci-cd/gitlab-ci.md) - [Pipeline Patterns](ci-cd/pipeline-patterns.md) - [Deployment Strategies](ci-cd/deployment-strategies.md) ### Containerization - [Docker Basics](containerization/docker-basics.md) - [Docker Compose](containerization/docker-compose.md) - [Container Best Practices](containerization/container-best-practices.md) - [Multi-Stage Builds](containerization/multi-stage-builds.md) ### Orchestration - [Kubernetes Basics](orchestration/kubernetes-basics.md) - [Helm Charts](orchestration/helm-charts.md) - [Service Mesh](orchestration/service-mesh.md) - [GitOps](orchestration/gitops.md) ### Monitoring - [Metrics Fundamentals](monitoring/metrics-fundamentals.md) - [Prometheus & Grafana](monitoring/prometheus-grafana.md) - [Alerting](monitoring/alerting.md) - [Dashboards](monitoring/dashboards.md) ### Logging - [Logging Best Practices](logging/logging-best-practices.md) - [Structured Logging](logging/structured-logging.md) - [ELK Stack](logging/elk-stack.md) - [Log Aggregation](logging/log-aggregation.md) ### Infrastructure - [IaC Fundamentals](infrastructure/iac-fundamentals.md) - [Terraform Basics](infrastructure/terraform-basics.md) - [Cloud Patterns](infrastructure/cloud-patterns.md) - [Cost Optimization](infrastructure/cost-optimization.md) ### Reliability - [SRE Fundamentals](reliability/sre-fundamentals.md) - [Incident Management](reliability/incident-management.md) - [Chaos Engineering](reliability/chaos-engineering.md) - [Disaster Recovery](reliability/disaster-recovery.md) ## DevOps Maturity Model ``` ┌─────────────────────────────────────────────────────────────────┐ │ DevOps Maturity Levels │ ├─────────────────────────────────────────────────────────────────┤ │ │ │ Level 5: Optimizing │ │ ├── Continuous improvement culture │ │ ├── Predictive analytics │ │ └── Self-healing systems │ │ │ │ Level 4: Measured │ │ ├── Comprehensive metrics │ │ ├── Data-driven decisions │ │ └── Automated compliance │ │ │ │ Level 3: Defined │ │ ├── Standardized pipelines │ │ ├── Infrastructure as Code │ │ └── Centralized logging/monitoring │ │ │ │ Level 2: Managed │ │ ├── Basic CI/CD │ │ ├── Some automation │ │ └── Manual deployments │ │ │ │ Level 1: Initial │ │ ├── Ad-hoc processes │ │ ├── Manual everything │ │ └── Siloed teams │ │ │ └─────────────────────────────────────────────────────────────────┘ ``` ## Best Practices 1. **Automate Everything** - Reduce manual toil 2. **Version Control All** - Code, configs, infrastructure 3. **Shift Left** - Test and secure early 4. **Measure What Matters** - Focus on DORA metrics 5. **Embrace Failure** - Learn from incidents 6. **Continuous Improvement** - Iterate and optimize 7. **Collaboration** - Break down silos 8. **Documentation** - Runbooks and playbooks