Streaming the audit log for your enterprise

About audit log streaming

To help protect your intellectual property and maintain compliance for your organization, you can use streaming to keep copies of your audit log data and monitor:

Access to your organization or repository settings
Changes in permissions
Added or removed users in an organization, repository, or team
Users being promoted to admin
Changes to permissions of a GitHub App
Git events, such as cloning, fetching, and pushing

The benefits of streaming audit data include:

Data exploration. You can examine streamed events using your preferred tool for querying large quantities of data. The stream contains both audit events and Git events across the entire enterprise account.
Data continuity. You can pause the stream for up to seven days without losing any audit data.
Data retention. You can keep your exported audit logs and Git events data as long as you need to.

Enterprise owners can set up, pause, or delete a stream at any time. The stream exports the audit and Git events data for all of the organizations in your enterprise.

Setting up audit log streaming

You set up the audit log stream on GitHub Enterprise Cloud by following the instructions for your provider.

Amazon S3
Azure Blob Storage
Azure Event Hubs
Google Cloud Storage
Splunk

Setting up streaming to Amazon S3

You can set up streaming to S3 with access keys or, to avoid storing long-lived secrets in GitHub Enterprise Cloud, with OpenID Connect (OIDC).

Setting up streaming to S3 with access keys
Setting up streaming to S3 with OpenID Connect
Disabling streaming to S3 with OpenID Connect

Setting up streaming to S3 with access keys

To stream audit logs to Amazon's S3 endpoint, you must have a bucket and access keys. For more information, see Creating, configuring, and working with Amazon S3 buckets in the the AWS documentation. Make sure to block public access to the bucket to protect your audit log information.

To set up audit log streaming from GitHub you will need:

The name of your Amazon S3 bucket
Your AWS access key ID
Your AWS secret key

For information on creating or accessing your access key ID and secret key, see Understanding and getting your AWS credentials in the AWS documentation.

In the top-right corner of GitHub.com, click your profile photo, then click Your enterprises.
In the list of enterprises, click the enterprise you want to view.
In the enterprise account sidebar, click Settings.
Under " Settings", click Audit log.
Under "Audit log", click Log streaming.
Select the Configure stream dropdown and click Amazon S3.
Under "Authentication", click Access keys.
Configure the stream settings.
- Under "Bucket", type the name of the bucket you want to stream to. For example, auditlog-streaming-test.
- Under "Access Key ID", type your access key ID. For example, ABCAIOSFODNN7EXAMPLE1.
- Under "Secret Key", type your secret key. For example, aBcJalrXUtnWXYZ/A1MDENG/zPxRfiCYEXAMPLEKEY.
To verify that GitHub can connect and write to the Amazon S3 endpoint, click Check endpoint.
After you have successfully verified the endpoint, click Save.

Setting up streaming to S3 with OpenID Connect

Note: Streaming to Amazon S3 with OpenID Connect is currently in beta and subject to change.

In AWS, add the GitHub OIDC provider to IAM. For more information, see Creating OpenID Connect (OIDC) identity providers in the AWS documentation.
- For the provider URL, use https://oidc-configuration.audit-log.githubusercontent.com.
- For "Audience", use sts.amazonaws.com.
Create a bucket, and block public access to the bucket. For more information, see Creating, configuring, and working with Amazon S3 buckets in the AWS documentation.

Create a policy that allows GitHub to write to the bucket. GitHub requires only the following permissions.

{
   "Version": "2012-10-17",
   "Statement": [
      {
         "Sid": "VisualEditor0",
         "Effect": "Allow",
         "Action": [
            "s3:PutObject"
         ],
         "Resource": "arn:aws:s3:::example-bucket/*"
     }
   ]
}

For more information, see Creating IAM policies in the AWS documentation.

Configure the role and trust policy for the GitHub IdP. For more information, see Creating a role for web identity or OpenID Connect Federation (console) in the AWS documentation.
- Add the permissions policy you created above to allow writes to the bucket.
- Edit the trust relationship to add the sub field to the validation conditions, replacing ENTERPRISE with the name of your enterprise.
```
"Condition": {
   "StringEquals": {
      "oidc-configuration.audit-log.githubusercontent.com:aud": "sts.amazonaws.com",
      "oidc-configuration.audit-log.githubusercontent.com:sub": "https://github.com/ENTERPRISE"
    }
 }
```
- Make note of the Amazon Resource Name (ARN) of the created role.
In the top-right corner of GitHub.com, click your profile photo, then click Your enterprises.
In the list of enterprises, click the enterprise you want to view.
In the enterprise account sidebar, click Settings.
Under " Settings", click Audit log.
Under "Audit log", click Log streaming.
Select the Configure stream dropdown and click Amazon S3.
Under "Authentication", click OpenID Connect.
Configure the stream settings.
- Under "Bucket", type the name of the bucket you want to stream to. For example, auditlog-streaming-test.
- Under "ARN Role" type the ARN role you noted earlier. For example, arn:aws::iam::1234567890:role/github-audit-log-streaming-role.
To verify that GitHub can connect and write to the Amazon S3 endpoint, click Check endpoint.
After you have successfully verified the endpoint, click Save.

Disabling streaming to S3 with OpenID Connect

If you want to disable streaming to S3 with OIDC for any reason, such as the discovery of a security vulnerability in OIDC, delete the GitHub OIDC provider you created in AWS when you set up streaming. For more information, see Creating OpenID Connect (OIDC) identity providers in the AWS documentation.

Then, set up streaming with access keys until the vulnerability is resolved. For more information, see "Setting up streaming to S3 with access keys."

Setting up streaming to Azure Blob Storage

Before setting up a stream in GitHub, you must first have created a storage account and a container in Microsoft Azure. For details, see the Microsoft documentation, "Introduction to Azure Blob Storage."

To configure the stream in GitHub you need the URL of a SAS token.

On Microsoft Azure portal:

On the Home page, click Storage Accounts.
Click the name of the storage account you want to use, then click Containers.
Click the name of the container you want to use.
Click Shared access tokens.
In the Permissions drop-down menu, change the permissions to only allow Create and Write.
Set an expiry date that complies with your secret rotation policy.
Click Generate SAS token and URL.
Copy the value of the Blob SAS URL field that's displayed. You will use this URL in GitHub.

On GitHub:

In the top-right corner of GitHub.com, click your profile photo, then click Your enterprises.
In the list of enterprises, click the enterprise you want to view.
In the enterprise account sidebar, click Settings.
Under " Settings", click Audit log.
Under "Audit log", click Log streaming.
Click Configure stream and select Azure Blob Storage.
On the configuration page, enter the blob SAS URL that you copied in Azure. The Container field is auto-filled based on the URL.
Click Check endpoint to verify that GitHub can connect and write to the Azure Blob Storage endpoint.
After you have successfully verified the endpoint, click Save.

Setting up streaming to Azure Event Hubs

Before setting up a stream in GitHub, you must first have an event hub namespace in Microsoft Azure. Next, you must create an event hub instance within the namespace. You'll need the details of this event hub instance when you set up the stream. For details, see the Microsoft documentation, "Quickstart: Create an event hub using Azure portal."

You need two pieces of information about your event hub: its instance name and the connection string.

On Microsoft Azure portal:

Search for "Event Hubs".
Select Event Hubs. The names of your event hubs are listed.
Make a note of the name of the event hub you want to stream to.
Click the required event hub. Then, in the left menu, select Shared Access Policies.
Select a shared access policy in the list of policies, or create a new policy.
Click the button to the right of the Connection string-primary key field to copy the connection string.

On GitHub:

In the top-right corner of GitHub.com, click your profile photo, then click Your enterprises.
In the list of enterprises, click the enterprise you want to view.
In the enterprise account sidebar, click Settings.
Under " Settings", click Audit log.
Under "Audit log", click Log streaming.
Click Configure stream and select Azure Event Hubs.
On the configuration page, enter:
- The name of the Azure Event Hubs instance.
- The connection string.
Click Check endpoint to verify that GitHub can connect and write to the Azure Events Hub endpoint.
After you have successfully verified the endpoint, click Save.

Setting up streaming to Google Cloud Storage

To set up streaming to Google Cloud Storage, you must create a service account in Google Cloud with the appropriate credentials and permissions, then configure audit log streaming in GitHub Enterprise Cloud using the service account's credentials for authentication.

Create a service account for Google Cloud. You do not need to set access controls or IAM roles for the service account. For more information, see Creating and managing service accounts in the Google Cloud documentation.
Create a JSON key for the service account, and store the key securely. For more information, see Creating and managing service account keys in the Google Cloud documentation.
If you haven't created a bucket yet, create the bucket. For more information, see Creating storage buckets in the Google Cloud documentation.
Give the service account the Storage Object Creator role for the bucket. For more information, see Using Cloud IAM permissions in the Google Cloud documentation.
In the top-right corner of GitHub.com, click your profile photo, then click Your enterprises.
In the list of enterprises, click the enterprise you want to view.
In the enterprise account sidebar, click Settings.
Under " Settings", click Audit log.
Under "Audit log", click Log streaming.
Select the Configure stream drop-down menu and click Google Cloud Storage.
Under "Bucket", type the name of your Google Cloud Storage bucket.
Under "JSON Credentials", paste the entire contents of the file for your service account's JSON key.
To verify that GitHub can connect and write to the Google Cloud Storage bucket, click Check endpoint.
After you have successfully verified the endpoint, click Save.

Setting up streaming to Splunk

To stream audit logs to Splunk's HTTP Event Collector (HEC) endpoint you must make sure that the endpoint is configured to accept HTTPS connections. For more information, see Set up and use HTTP Event Collector in Splunk Web in the Splunk documentation.

In the top-right corner of GitHub.com, click your profile photo, then click Your enterprises.
In the list of enterprises, click the enterprise you want to view.
In the enterprise account sidebar, click Settings.
Under " Settings", click Audit log.
Under "Audit log", click Log streaming.
Click Configure stream and select Splunk.
On the configuration page, enter:
- The domain on which the application you want to stream to is hosted.
  
  If you are using Splunk Cloud, Domain should be http-inputs-<host>, where host is the domain you use in Splunk Cloud. For example: http-inputs-mycompany.splunkcloud.com.
- The port on which the application accepts data.
  
  If you are using Splunk Cloud, Port should be 443 if you haven't changed the port configuration. If you are using the free trial version of Splunk Cloud, Port should be 8088.
- A token that GitHub can use to authenticate to the third-party application.
Leave the Enable SSL verification check box selected.

Audit logs are always streamed as encrypted data, however, with this option selected, GitHub verifies the SSL certificate of your Splunk instance when delivering events. SSL verification helps ensure that events are delivered to your URL endpoint securely. You can clear the selection of this option, but we recommend you leave SSL verification enabled.
Click Check endpoint to verify that GitHub can connect and write to the Splunk endpoint.
After you have successfully verified the endpoint, click Save.

Pausing audit log streaming

Pausing the stream allows you to perform maintenance on the receiving application without losing audit data. Audit logs are stored for up to seven days on GitHub.com and are then exported when you unpause the stream.

In the top-right corner of GitHub.com, click your profile photo, then click Your enterprises.
In the list of enterprises, click the enterprise you want to view.
In the enterprise account sidebar, click Settings.
Under " Settings", click Audit log.
Under "Audit log", click Log streaming.
Click Pause stream.
A confirmation message is displayed. Click Pause stream to confirm.

When the application is ready to receive audit logs again, click Resume stream to restart streaming audit logs.

Deleting the audit log stream

In the top-right corner of GitHub.com, click your profile photo, then click Your enterprises.
In the list of enterprises, click the enterprise you want to view.
In the enterprise account sidebar, click Settings.
Under " Settings", click Audit log.
Under "Audit log", click Log streaming.
Click Delete stream.
A confirmation message is displayed. Click Delete stream to confirm.