Storing a balena device's journal logs
This project is an example of how to persist a device's journal logs to either the disk, or the loggly cloud service.
Note that this project should be used as an example only, and the methods used to post logs to loggly are inefficient. No log rotation is implemented if the project is not using the loggly backend, which means that the device file system can fill up over time.
This project requires a device running balena-supervisor version >= v10.3.0.
Create an application on the balena dashboard, with the
device type you plan to use. We will assume an application
logging-app for the rest of this usage
Push this project to an application using balena-cli:
$ balena push logging-app
Saving logs to disk
By default this project will write the journal logs to disk.
The location of these logs will be
log-gatherer container. This location is actually the
mount point of the docker volume
log-volume, defined in
Exporting logs to the loggly service
This option requires a loggly account, and the HTTPS endpoint available from the loggly dashboard:
Take this URL and assign it to the device environment
LOGGLY_URL on the balena dashboard. This will
cause the service to restart and the logs will instead be
streamed to loggly, and not saved on disk.