[Server] Fixing Clock Drift

Fixing Clock Drift

Clock drift across your hosted CircleCI installation instances can cause a wide range of issues, from failed health checks to failed jobs. You might also notice AWS credential errors like below.

2020-08-05T15:42:43.461439671Z Caused by: com.amazonaws.services.ec2.model.AmazonEC2Exception: AWS was not able to validate the provided access credentials (Service: AmazonEC2; Status Code: 401; Error Code: AuthFailure; Request ID


CircleCI Server 2.x

Typically, error messages will indicate something about certificates "not yet being valid," and jobs will display curious runtimes ("finished five minutes from now").

Here's how to re-sync clocks across your instances:

  1. SSH into the Services box
  2. Install ntp if you haven't already: sudo apt-get install ntp
  3. Restart ntp. These steps may need to be run as root: 
    service ntp stop
    ntpdate -s time.nist.gov
    service ntp start
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