DEVOPS

Monthly GitLab CI Carbon Footprint Report

At month end, estimates the carbon footprint of your GitLab CI runner minutes by region and project.

CategoryDevOps
Enginesim
Difficultyintermediate
Triggerschedule
Steps5
Setup~15 min

How it runs

The automated pipeline, trigger to output.

  • TriggerFirst of the month schedule
  • ActionPull prior-month runner minutes by project/regionGitLabGitLab
  • LogicEstimate CO2 from minutes x grid intensity
  • ActionRank emitters and draft reduction leversOpenAI
  • OutputPublish carbon report to NotionNotionNotion

What it does

Converts a month of GitLab runner usage into estimated CO2 emissions, broken down by project and runner region, and publishes a clear sustainability report highlighting which pipelines emit the most and how to cut it.

When to use it

When you need to report engineering carbon for an ESG goal, or want to make the environmental cost of inefficient CI visible alongside the dollar cost. Pairs well with caching and scheduling initiatives.

How it works

  1. 1A scheduled trigger fires on the first of each month.
  2. 2The flow pulls the prior month's runner minutes per project and region from the GitLab API.
  3. 3A logic step multiplies minutes by region-specific grid carbon intensity to estimate kilograms of CO2 per project.
  4. 4An OpenAI step ranks the top emitters and drafts reduction levers — caching, off-peak scheduling, greener runner regions.
  5. 5The formatted report is published as a new Notion page for stakeholders.

Set it up

What you configure once, before turning it on.

  1. 1
    Connect GitLabRepos, MRs, pipelines, registry.
  2. 2
    Connect OpenAIModels, embeddings, files.
  3. 3
    Connect NotionPages, databases, comments.
  4. 4
    Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
  5. 5
    Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
  6. 6
    Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.

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