DevOpsil
Sign In

SRE Best Practices

Learn site reliability engineering fundamentals: SLOs, SLIs, error budgets, incident management, and toil reduction for reliable systems at scale.

sre best practicessite reliability engineeringslo sli slaerror budgetincident management

Tools to Explore

Prometheus

Monitoring

Open-source monitoring and alerting toolkit. Pull-based metrics collection with a powerful query language (PromQL), built-in alerting, and native Kubernetes service discovery.

Grafana

Observability

Open-source analytics and visualization platform. Create dashboards from Prometheus, Loki, Elasticsearch, and 150+ data sources. The standard for infrastructure observability.

Practice Your Skills

🚨

Incident Severity Rater

medium · 5-10 min

Read real-world incident scenarios and assign the correct severity from P1 to P4. Test your triage instincts and see how the community voted.

📋

Outage Timeline Builder

medium · 3-5 min

Given a shuffled list of events from a real-world outage, put them in the correct chronological order. Learn incident patterns by doing.

⏱️

Uptime Calculator

easy · 5-10 min

Interactive SLA calculator showing exactly how much downtime each availability level allows, plus a quiz to test your SLA math knowledge.

🤔

DevOps Would You Rather

easy · 5-10 min

Face impossible DevOps dilemmas. Debug at 3AM or write docs? See community votes and discover your DevOps personality.

Frequently Asked Questions

What is the difference between SRE and DevOps?
DevOps is a culture and set of practices for collaboration between dev and ops. SRE is a specific implementation of DevOps with defined roles, SLOs, and error budgets. Google describes it as 'SRE implements DevOps'.
What is an error budget?
An error budget is the allowed amount of unreliability derived from your SLO. If your SLO is 99.9% availability, your error budget is 0.1% (about 43 minutes/month). When the budget is exhausted, the team shifts focus from features to reliability.
How do I define good SLOs?
Base SLOs on user-facing metrics: request latency (p99 < 200ms), availability (99.9%), and error rate (< 0.1%). Start conservative, measure for a quarter, then tighten. SLOs should reflect what users actually care about.

Level Up Your DevOps Skills

Get weekly articles, tutorials, and hands-on challenges delivered to your inbox. Join thousands of DevOps engineers who read DevOpsil.

Subscribe to NewsletterRead the DevOps Bible