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Configuration best practices

This document highlights and consolidates configuration best practices for nebari-config.yaml that are introduced throughout the Getting Started, How To's, and Advanced Settings sections of the documentation.

Naming conventions​

When Nebari creates a new cloud resource on each one of the cloud providers, it will have to provide properties such as a name, project id, buckets, etc. for these resources. As Nebari mainly uses the project name from config to populate those attributes, we must ensure that for such cases, the resource attribute/name meets the bound conventions for the chosen cloud provider.

To avoid any burden on the user, on keeping track of each new naming rule for all infrastructure related resources that Nebari creates, we have automated the process to ensure that all resources are named in a consistent manner. The necessary restrictions for each cloud provider are presented below:

  • Letters from A to Z (upper and lower case) and numbers are allowed;
  • Special characters are NOT allowed;
  • Maximum accepted length of the name string is 16 characters;
  • If using AWS: names SHOULD NOT start with the string aws.
note

Each cloud provider has its own naming conventions which in some cases may be more restrictive or less restrictive than the ones listed above. For more information, refer to the "Initializing Nebari" section in the "How to Deploy ..." documentation for the specific cloud provider.

Omitting sensitive values​

If you wish to avoid storing secrets directly in the config yaml file you can instead set the values in environment variables. This substitution is triggered by setting config values to NEBARI_SECRET_ followed by the environment variable name.

For example, you could set the environment variables github_client_id and github_client_key and write the following in your config file:

security:
  authentication:
    type: GitHub
    config:
      client_id: NEBARI_SECRET_github_client_id
      client_secret: NEBARI_SECRET_github_client_key

Nebari version assertion​

All nebari-config.yaml files must contain a nebari_version field displaying the version of Nebari with which it’s intended to be deployed.

Typically, you can upgrade the nebari-config.yaml file itself by manually adding the intended version to the file and validating that the version matches the version of Nebari you are deploying with by calling nebari --version.

If available, you may also update the configuration using the nebari upgrade command. This will update image numbers, plus update nebari_version to match the installed version of Nebari, as well as any other bespoke changes required.

warning

Nebari will refuse to deploy if it doesn’t contain the same version as that of the nebari command.

Error: The schema validation of the nebari-config.yaml failed.
The following error message may be helpful in determining what went wrong:

nebari_version
  nebari_version in the config file must be equivalent to <installed version> to be
  processed by this version of Nebari (your config file version is <nebari_version>).
  Install a different version of nebari or run nebari upgrade to ensure your config
  file is compatible.
(type=value_error)