Automated Team Access Control with GitHub TeamSyncGroupMapping

Question

Pulumi · Accepted Answer

To set up automated team access control with GitHub, you can use the `github.TeamSyncGroupMapping` resource from the Pulumi GitHub provider. This resource allows you to automate the mapping between GitHub teams and groups from an identity provider (IdP) like Okta or Azure Active Directory. Through this integration, you can manage your team memberships in GitHub based on the groups defined in your IdP, ensuring that the right people have the right access.

Here is a step-by-step explanation followed by the Pulumi program in Python:

1. **Setting up the GitHub Team**: Before syncing the team with an IdP group, you need a team on GitHub. You will utilize the `github.Team` resource to create a new team within your GitHub organization.

2. **Configuring TeamSyncGroupMapping**: After creating the team, you can establish the mapping between this team and your external IdP group using `github.TeamSyncGroupMapping`. You will need to specify the team's slug and a list of groups with their identifiers, names, and descriptions.

3. **Assigning Members to Teams**: Members of the IdP groups will be automatically added to the corresponding GitHub team based on the mappings you define. Their membership is managed by the IdP and synchronized with GitHub.

Let's look at the Pulumi program that accomplishes this:

```python
import pulumi
import pulumi_github as github

# 1. Create a new GitHub team.
team = github.Team("example-team",
    description="My example team")

# 2. Create a new TeamSyncGroupMapping.
# Replace `group_id`, `group_name`, and `group_description` with your actual IdP group information.
# The `team_slug` is automatically populated with the slug of the team you just created.
team_sync = github.TeamSyncGroupMapping("example-team-sync",
    team_slug=team.slug,
    groups=[{
        "group_id": "YOUR_IDP_GROUP_ID",
        "group_name": "YOUR_IDP_GROUP_NAME",
        "group_description": "Description of my IdP group"
    }])

# 3. The mapping will now ensure that members of the 'YOUR_IDP_GROUP_NAME' group in your IdP
# are now members of the 'example-team' in GitHub. Membership changes in the IdP group will
# reflect on the GitHub team dynamically.

# Export the team slug to access it easily, e.g., from the Pulumi Console.
pulumi.export("team_slug", team.slug)
```

Replace the placeholder values (e.g., `YOUR_IDP_GROUP_ID`, `YOUR_IDP_GROUP_NAME`) with the actual values from your identity provider.

This program will create a new GitHub team and a sync group mapping for you. Once this is applied via Pulumi:

- **GitHub Team**: A team corresponding to the provided name and description is created in your GitHub organization.
  
- **TeamSyncGroupMapping**: A connection between the GitHub team and an external group in your identity provider is established, keeping the team's membership in sync automatically as changes occur in the IdP group.

After running this code with Pulumi, any membership updates in the specified IdP group will reflect in the GitHub team membership without needing manual intervention, providing an automated way to control team access based on your centralized identity management system.