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What do you check first when a CI pipeline passes locally but fails in CI? (lemmy.world)

submitted 22 hours ago by indidev@lemmy.world to c/programming@programming.dev

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Been dealing with this more often lately. Tests pass on my machine, I push, and CI blows up. Usually it's one of these:

Different Node/Python/whatever version
Missing env vars that exist in my .env but not in CI secrets
File system case sensitivity (macOS vs Linux)
Some flaky test that depends on timing

My current debugging flow is pretty basic: check the logs, compare versions, run the exact same Docker image locally if I can. But it still eats 20-30 minutes each time before I figure out the actual problem.

Anyone have a more systematic approach? Like a quick checklist you run through before you even look at the logs?

Also curious — do you replicate your CI environment locally with something like act (for GitHub Actions) or just trust the remote runner?

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[–] Kissaki@programming.dev 1 points 20 hours ago* (last edited 20 hours ago)

Usually, when CI fails, it's a flaky CI failure or that I have in fact not run it locally.

I guess some context is missing. My build flow seems much simpler. I check the CI steps overview and step log, and then I know what's wrong. That doesn't take 20 min. More like ~3 min.

At work, we use Jenkins and the runners are owned infrastructure. If I debug what goes wrong in the CI environment, I go into the pipeline definition, and do the calls locally, just like that, on the command line. No need for complicated environment replication beyond that. dotnet restore, dotnet build --no-restore, dotnet package --no-build, dotnet test --no-build, etc.

If it's not CI specific, issues show up in the normal local tooling without special env prep.