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View and Download MongoDB Logs

Each mongod and mongos tier keeps an account of its activity in its own log file. Atlas retains the last 30 days of log messages and system event audit messages for each tier in a cluster. The Performance Advisor retains at most 7 days of logs for each tier in a cluster.

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M0 Free Tier and M2/M5 shared clusters do not provide downloadable logs.

To download the logs for a single tier in a given cluster:

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If you do not see the cluster you want on the page, ensure you have selected the proper Project.

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  1. Click the ellipsis icon (...) next to the cluster containing the mongod instance whose logs you want to download.
  2. Select Download Logs.
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If you have not set a project time zone, the returned log data may not respect the configured date range. See Manage Project Settings.

FieldContent
Select processSelect the process for which you want logs. Valid options are mongod and mongod-audit-log.
Select serverSelect the server in the cluster whose logs you want to retrieve.
Start TimeSpecify the date and time in your group's time zone defining the inclusive lower bound of log activity to return. The start time must be less than 30 days ago.
End TimeSpecify the date and time in your group's time zone defining the inclusive upper bound of log activity to return.
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For information on reading MongoDB logs, refer to the Log Messages documentation in the MongoDB manual.

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Feature unavailable in Free and Shared-Tier Clusters

This feature is not available for M0 (Free Tier), M2, and M5 clusters. To learn more about which features are unavailable, see Atlas M0 (Free Tier), M2, and M5 Limitations.

You can view authentication attempts that were made against your cluster. Both successful and unsuccessful attempts are logged, including the timestamp of the attempt and which user tried to authenticate.

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