We want an alert when the cloud bill goes above X EUR
Three alarms: a daily budget, a month actuals, and a month forecast. An alert that only fires after the fact is too late, a forecast alert gives you a week to intervene.
Try this first
- 1Set an AWS Budget, Azure Cost Management Budget or GCP Budget at your expected monthly spend plus 20 percent. On breach, email finance and CTO.
- 2Add a second budget for forecast: trigger if the forecast goes above ceiling mid-month. That fires earlier.
- 3Add a third daily alert: e.g. when daily spend exceeds 1/25 of your monthly budget. That catches runaway resources like a forgotten GPU instance.
- 4Send alerts to Slack or Teams via SNS+Lambda or Logic App, not just email. People read email too late.
- 5Check every quarter that the amount still fits. A stale budget triggers false positives and gets ignored.
When to bring us in
If the bill has been climbing for weeks without a clear cause, an hour together in cost explorer usually finds the source.
See also
- Everyone logs in with the AWS root accountRoot is for emergencies and billing. Day-to-day work belongs in IAM users or SSO.
- Every developer has AdministratorAccessAdministratorAccess everywhere is convenient now, painful later. Start with role-based policies.
- Everyone has individual IAM users with their own passwordIdentity Center (formerly AWS SSO) links to your IdP and issues temporary credentials per session.
None of the above fits?
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