A simple SLI/SLO calculator that allows playing with different parameters to see their impact.

👉 See it live

👉 Read the introduction

• Implementing SLOs: a good guide from Google Workbook about pragmatic tips about SLIs and SLOs
• Request based and window based SLIs
• Time based vs event based SLIs
• Alerting on SLOs

• Google:
  • Alerting on your burn rate talks about fast and slow burn rate
  • Request-based and window-based SLOs
• Datadog:
  • Service Level Objectives
  • Track the status of all your SLOs in Datadog
• Dynatrace:
  • SLO pitfalls and how to avoid them (PDF)
  • Service Level Objectives (SLOs) at Scale (Tips and Tricks)
• Elastic:
  • SLOs
  • Create SLO
  • Create burn rate

• OpenSLO defines a DSL (domain-specific language) for SLI/SLO
• uptime.is is time based, compute SLO from error budget
• slatools.com a collection of calculation tools: uptime, SLA breach, SLA credit
• availability.sre.xyz shows a simple printable table for availability
• observablehq.com has a great guide and allows considering recovery time in the calculations. It also has animated simulations which helps understand the concepts.
• burnrate.netlify.app/ supports human readable string formats for time
• omnicalculator.com calculates uptime and allows converting time units

Like most of my hobby projects, this repo wasn't meant to grow this big. It started as a single page application to compensate some shortcomings I faced when using uptime.is with these preconditions:

1. No transpilation whatsoever (because)
2. Use the latest version of Vue (to learn it)
3. Run tests with Deno (to learn it)
4. Use Github Copilot assistence (to learn it)

And here we are.

• iconoir for open source icons.
• Volvo Cars employees for the feedback on the early versions of the product.

Made by Alex Ewerlöf