Restrict remote repositories

This document shows you how to use the Organization Policy Service to restrict the pool of third-party remote Git repositories that Dataform repositories can connect to.

Before you begin

Before you set or edit the dataform.restrictGitRemotes policy, find full URLs of the remote Git repositories that you want to allow-list.

To find the full URL of a remote Git repository that is already connected to a Dataform repository, follow these steps:

In the Google Cloud console, go to the Dataform page.

Go to Dataform
Select a repository, and then click Settings.

Keep in minds that URLs of remote repositories displayed on the Dataform page are shortened and cannot be used in the dataform.restrictGitRemotes policy.
On the Settings page, under Git connection settings, copy the Repository source value.

The Repository source value is the full URL of the remote repository. You can use this URL in the dataform.restrictGitRemotes policy.

Required roles

To get the permissions that you need to manage organization policies, ask your administrator to grant you the Organization policy administrator (roles/orgpolicy.policyAdmin) IAM role on the organization. For more information about granting roles, see Manage access to projects, folders, and organizations.

This predefined role contains the permissions required to manage organization policies. To see the exact permissions that are required, expand the Required permissions section:

Required permissions

The following permissions are required to manage organization policies:

orgpolicy.constraints.list
orgpolicy.policies.create
orgpolicy.policies.delete
orgpolicy.policies.list
orgpolicy.policies.update
orgpolicy.policy.get
orgpolicy.policy.set

You might also be able to get these permissions with custom roles or other predefined roles.

About restricting remote Git repositories

You can connect a Dataform repository to a GitHub or a GitLab repository.

You might want to restrict the pool of remote repositories that Dataform repositories can connect to in order to prevent malicious actors from accessing your Dataform codebase and access tokens through unprotected copies of your repository.

You can use Organization Policy Service to create an organization policy that restricts which Git repository URLs Dataform can connect to.

The constraint for restricting remote Git repositories in Dataform is:

constraints/dataform.restrictGitRemotes

To use the constraint, you create an organization policy with an allowedValues list of URLs of remote Git repositories that can connect to a Dataform repository. Remote Git repositories are identified by their full URL address.

Thedataform.restrictGitRemotes policy has a retroactive effect, which means that the constraint impacts pre-existing Dataform repositories.

When the organization policy is in place, Dataform repository can connect to only the remote Git repositories that are listed in the allowedValues list. Remote Git repositories that are not explicitly defined in the organization policy are prohibited from connecting to a Dataform repository.

If you do not set the dataform.restrictGitRemotes policy, communication between Dataform repositories and remote Git repositories are not restricted.

You can use the dataform.restrictGitRemotes policy in the following ways:

Allow all: Dataform repositories are allowed to connect to all remote repository URLs. Select this option if your organization does not want to block any communication with remote repositories. Alternatively, to allow all remote repository URLs, you can leave the organization policy unset.
allowedValues list of URLs: Dataform repositories are allowed to connect to only the allow-listed remote repositories. Select this option to prevent data exfiltration.
Deny all: Dataform repositories are not allowed to connect to any remote URLs. Select this option if your organization wants to block all communication and use Dataform repositories.

Specifications for allow-listing remote Git repositories

You can apply this list constraint only to GitHub and GitLab repositories.
The organization policy is applied retroactively and affects existing Dataform repositories.
This constraint accepts allowedValues, blocking connection to all other remote Git repositories, or Deny all. The default is Allow all - an unset organization policy allows communication with all remote Git repositories. We recommend setting the organization policy to allowedValues.
It is up to you or an administrator with the required permissions to manage and maintain the policy. Ensure communication about the policy administrator within your organization.

Set the organization policy constraint at the organization level

Console

Go to the /Organizational Policies/Organization Policies page.
Go to Organizational Policies
If necessary, select the required organization from the project drop-down menu.
Click Restrict git remotes for repositories in Dataform.
Click Manage policy. If you can't click the Manage policy button, you do not have the correct permissions.
Select Customize to set the organization policy for specific remote Git repositories.
Select the required Policy enforcement and Policy type.
For Policy values, select Custom.
Enter the full URL of a remote Git repository.
Click New policy value and enter full URLs of remote Git repositories as needed.
Click Save to apply the constraint.

gcloud

To set a constraint for remote Git repositories, you first need your organization ID. You can find the organization ID by running the organizations list command and looking for the numeric ID in the response:

gcloud organizations list

The gcloud CLI returns a list of organizations in the following format:

DISPLAY_NAME               ID
example-organization1      29252605212
example-organization2      1234567890

Use the gcloud resource-manager org-policies set-policy command to set the organization policy. You need to provide your policy as a JSON or YAML file. Create a JSON file in the following format:

{
  "name": "organizations/ORGANIZATION_ID/policies/dataform.restrictGitRemotes",
  "spec": {
    "rules": [
      {
        "values": {
          "allowedValues": ["https://github.com/example/allowed-repository.git"]
        }
      }
    ]
  }
}

Replace ORGANIZATION_ID with the numeric ID of the organization.

If you do not want Dataform repositories to be able to connect to any remote Git repositories, you can set an organization policy with denyAll set to true:

{
  "name": "organizations/ORGANIZATION_ID/policies/dataform.restrictGitRemotes",
  "spec": {
    "rules": [
      {
        "denyAll": true
      }
    ]
  }
}

Replace ORGANIZATION_ID with the numeric ID of the organization.

API

Use the setOrgPolicy() API to define your constraint. Dataform is allowed to connect to the remote Git repository URLs in the allowedValue list you specify.

For example, the following is a request to apply the dataform.restrictGitRemotes constraint to an organization where selected remote Git repositories Dataform repositories can connect to:

POST https://orgpolicy.googleapis.com/v2/organizations/ORGANIZATION_ID/policies

where ORGANIZATION_ID is the numeric ID of the organization.

Now, in your request body, provide the desired organization policy for this constraint:

{
  "name": "organizations/ORGANIZATION_ID/policies/dataform.restrictGitRemotes",
  "spec": {
    "rules": [
      {
        "values": {
          "allowedValues": ["https://github.com/example/allowed-repository.git"]
        }
      }
    ]
  }
}

Replace <code><var>ORGANIZATION_ID</var></code> with the numeric ID
of the organization.

If you do not want Dataform repositories to be able to connect to any remote Git repositories, you can set an organization policy with denyAll set to true:

{
  "name": "organizations/ORGANIZATION_ID/policies/dataform.restrictGitRemotes",
  "spec": {
    "rules": [
      {
        "denyAll": true
      }
    ]
  }
}

Replace <code><var>ORGANIZATION_ID</var></code> with the numeric ID
of the organization.

If the organization policy is already set, you need to execute the following request with the organization policy definition as request body:

PATCH https://orgpolicy.googleapis.com/v2/organizations/ORGANIZATION_ID/policies/dataform.restrictGitRemotes

Set the organization policy at the project level

Setting an organization policy at the project level overrides or merges with the organization policy at the organization level. In case of a merge, denyAll take precedence over allowedValues. For example, if the organization policy at the organization level is set to denyAll, and the merged policy at the project level lists a remote repository URL on the allowedValues list, Dataform is not allowed to connect to the remote repository. In such case, the organization policy at the project level must override the policy at the organization level, so that Dataform can connect to the remote repository. To learn more about Organization Policy hierarchy, see Understanding hierarchy evaluation.

Console

Follow the same process documented under Set the organization policy constraint at the organization level but choose your desired project from the project selector instead of the organization.

Project selector.

gcloud

Use the gcloud resource-manager org-policies set-policy command to set the organization policy. You need to provide your policy as a JSON or YAML file.

Create a JSON file in the following format:

{
  "name": "projects/PROJECT_ID_OR_NUMBER/policies/dataform.restrictGitRemotes",
  "spec": {
    "rules": [
      {
        "values": {
          "allowedValues": ["https://github.com/example/allowed-repository.git"]
        }
      }
    ]
  }
}

Replace PROJECT_ID_OR_NUMBER with the project ID or project number for this organization policy.

Then, pass in the file with your request:

gcloud resource-manager org-policies set-policy MY_POLICY.JSON --project=PROJECT_ID

API

Use the setOrgPolicy() API to define your constraint. Dataform is allowed to connect to the remote Git repository URLs in the allowedValue list you specify.

For example, the following is a request to apply the dataform.restrictGitRemotes constraint to an organization where Dataform repositories can connect only to the selected remote Git repositories, and the constraints/dataform.restrictGitRemotes policy is not set yet:

POST https://orgpolicy.googleapis.com/v2/projects/PROJECT_ID_OR_NUMBER/policies

The request body contains the desired organization policy for this constraint:

{
  "name": "projects/PROJECT_ID_OR_NUMBER/policies/dataform.restrictGitRemotes",
  "spec": {
    "rules": [
      {
        "values": {
          "allowedValues": ["https://github.com/example/allowed-repository.git"]
        }
      }
    ]
  }
}

Replace PROJECT_ID_OR_NUMBER with the project ID or project number for this request.

The following is a request to apply the dataform.restrictGitRemotes constraint to an organization where Dataform repositories can connect to only the selected remote Git repositories, and the constraints/dataform.restrictGitRemotes policy is already set:

PATCH https://orgpolicy.googleapis.com/v2/projects/PROJECT_ID_OR_NUMBER/policies/dataform.restrictGitRemotes

The request body contains the desired organization policy for this constraint:

{
  "name": "projects/PROJECT_ID_OR_NUMBER/policies/dataform.restrictGitRemotes",
  "spec": {
    "rules": [
      {
        "values": {
          "allowedValues": ["https://github.com/example/allowed-repository.git"]
        }
      }
    ]
  }
}

Replace PROJECT_ID_OR_NUMBER with the project ID or project number for this request.

Best practices for allow-listing Git remotes

To mitigate data exfiltration risk, explicitly set the dataform.restrictGitRemotes constraint to allow-list a selection of trusted remote Git repositories.
If you only use Dataform repositories that are not connected to remote Git repositories, set the dataform.restrictGitRemotes constraint to Deny All.
Avoid using the deniedValues list with this constraint. If you define values in the deniedValues list, it means that only the remote Git repositories in the deniedValues list are restricted from connection. This could be a security concern if you want control over exactly which remote Git repositories Dataform can connect to. If you want to remove certain remote Git repositories from the allowedValues list, update the existing organization policy to remove them from the allowedValues list rather than putting the remote into the deniedValues list at a lower hierarchy.
If you want to set an organization policy over a large part of the resource hierarchy but exempt certain projects, restore the default organization policy by using the setOrgPolicy method by specifying the restoreDefault object to allow all Dataform repositories in the projects to be connected to remote Git repositories. The policies currently in place for projects are not affected by the default setting.
Use Organization Policy together with IAM roles to better control access to your Dataform codebase.
Any Dataform repositories within the organization or project with the organization policy enabled are subject to this policy. If this is an issue, we recommend that you set up other services and products in a different project that does not have the organization policy applied, and use Shared VPC, if needed.
Before setting the dataform.restrictGitRemotes policy, ensure communication about the organization policy and its administrator within your organization. It is up to you or an administrator with the required permissions to manage and maintain the policy.

What's next

To learn more about the Organization Policy, see Introduction to the Organization Policy Service.
To learn more about Organization Policy constraints, see Organization Policy constraints.
To learn how to manage Google Cloud resources with Resource Manager, see Manage your Google Cloud resources.