Getting support logs

The EFS mount helper has built-in logging for your Amazon EFS file system. You can share these logs with AWS Support for troubleshooting purposes. You can find the logs stored in /var/log/amazon/efs on clients using the EFS mount helper. These logs are for the EFS mount helper, the stunnel process (disabled by default), and for the amazon-efs-mount-watchdog process that monitors the stunnel process.

Note

The amazon-efs-mount-watchdog process ensures that each mount's stunnel process is running, and stops the stunnel process when the Amazon EFS file system is unmounted. If for some reason a stunnel process is terminated unexpectedly, the watchdog process will restart it.

You can change the log configuration in /etc/amazon/efs/efs-utils.conf. In order for any log changes to take effect, you need to unmount and remount the file system using the EFS mount helper. Log capacity for the mount helper and watchdog logs is limited to 20 MiB. Logs for the stunnel process are disabled by default.

Important

You can enable logging for the stunnel process logs. However, enabling the stunnel logs can use up a nontrivial amount of space on your file system.