Frequently Asked Questions

How to fix “Missing step configuration file valohai.yaml”?

Your source code repository must contain a valohai.yaml file at the root of the repository that defines how and in which kind of runtime environment your experiments are run.

For instance, here is a valohai.yaml file that lists runtime contents of your repository for debugging purposes.


- step:
    name: Show contents of my repository
    image: busybox
    command: ls -la /valohai/repository

See valohai.yaml documentation for more details.

How to define that my execution failed?

The command is considered to be successful if it returns error code 0. This is the default convention for most programs and scripting languages.

The platform will mark an execution as crashed if any of the commands returns any other error code.

The best approach to log what went wrong is to use stderr which is visible on the execution Logs tab.

How to pass command parameters in Rscript myscript.r arg1 arg2 format?

You define how the parameters are passed in the parameters section in valohai.yaml.

The default syntax is --{name}={value} so:

- name: dropout
  pass-as: '--dropout={v}'

To achieve the syntax mentioned in the question, add or modify the pass-as property:

- name: dropout
  pass-as: '{v}'

See the valohai.yaml documentation for more details.

How do I upload files from my executions?

Anything written to the /valohai/outputs directory will be uploaded and accessible after the execution.

The files are uploaded into a user-specific section of our AWS S3 bucket by default, but you can customize this.