Drift Detection

One of the main challenges when managing infrastructure as code is drift.
Drift means that the real-world state of your resources is different than your actual code. This can happen if someone is adding, updating or removing resources manually or with some automation tools outside of your Terraform code. env0 can help you detect those drifts and alert you about them automatically, this is done by setting a scheduled deployment task that ends by examining the terraform plan output.

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Previous Support

Although you could configure a scheduled task of drift detection before as well, now we provide additional drift event notifications.

If you would like to set up a drift detection on your environment and get notified if a drift occurred you will need to follow these steps:

1. Schedule a drift detection job: In the environment Settings tab, under Drift Detection make sure you add a cron expression based on the interval you would like to check the drift. For example, if you would like to check the drift twice a day at 10AM and at 7PM enter 00 10,19 * * *.

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Drift Detection Scheduling

Note that despite being able to configure any cron definition for drift detection, the minimum interval would be 1 hour between every check.

2. Add Slack/Teams Notification: To get notified directly in Slack or Microsoft Teams when a drift has been detected, set up notifications targets & events on your project settings under Notifications.
   You can set the following types of events:
   - Drift detected - The remote resources have been changed.
   - No drift detected - The remote resources are synced with your infrastructure code.
   - Drift failed - The task has failed for some reason.

You can read more about notifications here.

When a drift detection job is executed you'll see its status under the Deployments tab :

If a drift has been detected, both environment & deployment statuses will be updated to Drifted. Notice that the subsequent deployment of a drifted environment will override its status as it should be.

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