📡 sre-beacon

SRE Metrics Calculator & Reliability Analyzer

A Python CLI tool for Site Reliability Engineering — calculate SLO compliance, error budgets, availability nines, incident metrics (MTTR/MTTA/MTBF), toil estimation, Prometheus alert rule auditing, and SRE maturity assessment.

Features

Installation

git clone https://github.com/SanjaySundarMurthy/sre-beacon.git
cd sre-beacon
pip install -e .

Quick Start

# Run the full demo (creates sample data and runs all 6 analyses)
sre-beacon demo

# Run with verbose output
sre-beacon demo -v

Commands

SLO Compliance

sre-beacon slo slos.yaml actuals.yaml
sre-beacon slo slos.yaml actuals.yaml -v          # detailed error budgets
sre-beacon slo slos.yaml actuals.yaml -f json -o report.json

slos.yaml:

slos:
  - name: API Availability
    service: api-gateway
    sli_type: availability
    target: 99.9
    window_days: 30

actuals.yaml:

actuals:
  - name: API Availability
    value: 99.85
    burn_rate: 1.5

Availability Calculator

sre-beacon availability services.yaml
sre-beacon availability services.yaml -v    # nines comparison table

services.yaml:

services:
  - name: api-gateway
    total_minutes: 43200
    downtime_minutes: 45
    period: 30 days

Incident Analysis

sre-beacon incidents incidents.yaml
sre-beacon incidents incidents.yaml -v       # per-service breakdown
sre-beacon incidents incidents.yaml -f json -o report.json

Toil Estimation

sre-beacon toil tasks.yaml
sre-beacon toil tasks.yaml -v                # list all tasks
sre-beacon toil tasks.yaml --hours 200       # custom engineering hours

Alert Rule Audit

sre-beacon alerts alert-rules.yaml
sre-beacon alerts alert-rules.yaml -v              # show all issues
sre-beacon alerts alert-rules.yaml --fail-on critical   # CI/CD gate
sre-beacon alerts alert-rules.yaml -f json -o audit.json

SRE Maturity Assessment

sre-beacon maturity assessment.yaml
sre-beacon maturity assessment.yaml -v      # findings & recommendations

Alert Audit Rules (15)

Maturity Dimensions (8)

1. SLO Adoption — SLO coverage, error budget tracking, review cadence
2. Incident Management — Process, post-mortems, action items, detection
3. Monitoring & Observability — Metrics, logging, tracing, golden signals
4. Toil Reduction — Tracking, automation projects, self-service tools
5. Blameless Culture — Post-mortems, learning reviews, psychological safety
6. On-Call Practices — Rotation, compensation, runbooks, handoff
7. Capacity Planning — Monitoring, projections, auto-scaling, load testing
8. Change Management — CI/CD, canary deployments, rollback, feature flags

Export Formats

• Terminal — Rich formatted output (default)
• JSON — Machine-readable export
• HTML — Styled dark-theme report

CI/CD Integration

# GitHub Actions — fail on critical alert issues
- name: Audit Alert Rules
  run: |
    pip install sre-beacon
    sre-beacon alerts ./monitoring/alert-rules.yaml --fail-on critical

Testing

python -m pytest tests/ -v
# 101 tests, all passing

Architecture

sre_beacon/
├── models.py                    # Core data models
├── calculators/
│   ├── slo_calculator.py        # SLO compliance & error budgets
│   ├── availability_calculator.py  # Availability & nines
│   ├── incident_calculator.py   # MTTR, MTTA, MTBF
│   └── toil_calculator.py       # Toil estimation
├── analyzers/
│   ├── alert_analyzer.py        # 15 alert audit rules
│   └── maturity_analyzer.py     # 8-dimension maturity scoring
├── reporters/
│   ├── terminal_reporter.py     # Rich terminal output
│   └── export_reporter.py       # JSON & HTML export
├── cli.py                       # Click CLI
└── demo.py                      # Demo data generator

License

MIT