Integrating with GitLab

In this guide, we’ll link a private GitLab repository to a Valohai project using a deploy key.

Requirements

  • A private Gitlab repository

  • A Valohai project

  • A tool that generates SSH keys. This guide uses ssh-keygen

Generate an SSH key pair

Use ssh-keygen to create a new SSH key pair.

$ ssh-keygen -t rsa -b 4096 -N '' -f my-project-deploy-key

This will generate two files:

  • my-project-deploy-key.pub is the public key you add to GitLab.

  • my-project-deploy-key is the private key you add to Valohai.

Don’t include the keys in your version control

You should not include these keys in the version control. Anybody that gains access to the my-project-deploy-key file contents will have read access to your repository, so use appropriate caution.

Add the public key to GitLab

Find the my-project-deploy-key.pub file we generated in the last section, and it should contain one line that starts with ssh-rsa AAAA.... This line is the public key that we’ll be adding to GitLab.

Navigate to the add deploy key page in your GitLab repository at Settings > Repository > Deploy Keys.

Note

If you can’t see this Deploy Keys menu, you are most likely lacking the permissions to add deploy keys so contact your GitLab admins.

GitLab - route to the deploy key creation page
  • Copy and paste the contents of my-project-deploy-key.pub into the Key field.

  • Give the deploy key an identifying Title such as Valohai.

  • Valohai doesn’t require write access, make sure that is off.

GitLab - deploy public key setup example

Add the private key to Valohai

Go to app.valohai.com and navigate to the repository settings in your Valohai Project through Settings > Repository.

Valohai - route to repository settings

To make sure you get the correct repository URL, open GitLab in another tab. On GitLab, navigate to Code page and press Clone or download.

Make sure you have Clone with SSH active on the popup window. If it reads Clone with HTTPS, click the Use SSH button next to the text.

Then copy the text field with git@GitLab.com:<owner>/<repository>.git

GitLab - where to find repository SSH URL

Next paste the SSH URL (git@GitLab.com:<owner>/<repository>.git) into the URL field.

On your local machine, find the my-project-deploy-key file (without the .pub extension) we generated before. It should contain multiple lines starting with -----BEGIN RSA PRIVATE KEY----- or something similar. The contents of this file are the private key we’ll be adding to Valohai.

Copy and paste the contents of my-project-deploy-key into the SSH private key field.

Valohai - repository configuration example

After you click Save, Valohai links the GitLab repository to the project and automatically fetches your code.

After you add new commits to your GitLab repository, remember to press the Fetch repository to update the code in Valohai.

Valohai - highlighted Fetch repository button
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