HAS uses a single logger, oslo, across all the components. The logging format is compliant with the EELF recommendations, including having the following logs: error, audit, metric, application.

The log statements follow the following format (values default to preset values when missing):

Timestamp|RequestId|ServiceInstanceId|ThreadId|Virtual Server Name|ServiceName|InstanceUUID|Log Level|Alarm Severity Level|Server IP Address|HOST NAME|Remote IP Address|Class name|Timer|Detailed Message

The logger util module can be found at:


Log File Rotation

Sample logrotate.d configuration files have been provided in the repository.

To install, place all Conductor logrotate files in /etc/logrotate.d.

Set file ownership and permissions:

$ sudo chown root:root /etc/logrotate.d/conductor*
$ sudo chmod 644 /etc/logrotate.d/conductor*

logrotate.d automatically recognizes new files at the next log rotation opportunity and does not require restarting.