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