Healthcheck inclusion

[ThomDietrich]

Hello all,

This is a copy of bcardiff#14 - not sure which issue tracker is better suited but I am currently using the pfidr34 fork.

(reference: https://docs.docker.com/engine/reference/builder/#healthcheck)

I wanted to raise a discussion to define a healthcheck for this image, either in the image itself or as a post-defined instruction for run / docker-compose.

Side not on the existing healthcheck.io integration: Imho these two can be implemented in parallel.

Which command do you think is best suited to check the health of the image? It would be easy to check that cron is running but a better health indicator would check the success of actual cron jobs.

Any suggestions? What works for you? Are you interested to implement something in the code of this image?

Best!

[pfidr34]

@ThomDietrich

Just wanted to give you an update that I have read this issue and I think it is a good idea.

I am currently very busy at work and have not had time to look into this but may in the future.

If you would like to submit a pull request for this feature I would also be happy to review that.

[dantebarba]

As a sidenote this could be done by:

1. saving the last n status codes of the rclone command into a file
2. point the healthcheck to read this file. If the status code failed the last n-times, mark as unhealthy
3. the file should be created in the Dockerfile and by default should contain the first 0, so Docker assumes healthy on startup.