# Database Access with AlloyDB Teleport can provide secure access to AlloyDB via the [Teleport Database Service](https://goteleport.com/docs/enroll-resources/database-access.md). This allows for fine-grained access control through [Teleport's RBAC](https://goteleport.com/docs/enroll-resources/database-access/rbac.md). In this guide, you will: 1. Configure your AlloyDB database with a service account. 2. Add the database to your Teleport cluster. 3. Connect to the database via Teleport. ## How it works The Teleport Database Service uses IAM authentication to communicate with AlloyDB. When a user connects to the database via Teleport, the Teleport Database Service obtains Google Cloud credentials and authenticates to Google Cloud as an IAM principal with permissions to access the database. ![Teleport Architecture for AlloyDB Access](/docs/assets/images/architecture-4d2cc43d241a8934656315deb2bb278b.png) ## Prerequisites - A running Teleport cluster. If you want to get started with Teleport, [sign up](https://goteleport.com/signup) for a free trial or [set up a demo environment](https://goteleport.com/docs/get-started/deploy-community.md). - The `tctl` and `tsh` clients. Installing `tctl` and `tsh` clients 1. Determine the version of your Teleport cluster. The `tctl` and `tsh` clients must be at most one major version behind your Teleport cluster version. Send a GET request to the Proxy Service at `/v1/webapi/find` and use a JSON query tool to obtain your cluster version. Replace teleport.example.com:443 with the web address of your Teleport Proxy Service: ``` $ TELEPORT_DOMAIN=teleport.example.com:443 $ TELEPORT_VERSION="$(curl -s https://$TELEPORT_DOMAIN/v1/webapi/find | jq -r '.server_version')" ``` 2. Follow the instructions for your platform to install `tctl` and `tsh` clients: **Mac** Download the signed macOS .pkg installer for Teleport, which includes the `tctl` and `tsh` clients: ``` $ curl -O https://cdn.teleport.dev/teleport-${TELEPORT_VERSION?}.pkg ``` In Finder double-click the `pkg` file to begin installation. --- DANGER Using Homebrew to install Teleport is not supported. The Teleport package in Homebrew is not maintained by Teleport and we can't guarantee its reliability or security. --- **Windows - Powershell** ``` $ curl.exe -O https://cdn.teleport.dev/teleport-v${TELEPORT_VERSION?}-windows-amd64-bin.zip Unzip the archive and move the `tctl` and `tsh` clients to your %PATH% NOTE: Do not place the `tctl` and `tsh` clients in the System32 directory, as this can cause issues when using WinSCP. Use %SystemRoot% (C:\Windows) or %USERPROFILE% (C:\Users\) instead. ``` **Linux** All of the Teleport binaries in Linux installations include the `tctl` and `tsh` clients. For more options (including RPM/DEB packages and downloads for i386/ARM/ARM64) see our [installation page](https://goteleport.com/docs/installation.md). ``` $ curl -O https://cdn.teleport.dev/teleport-v${TELEPORT_VERSION?}-linux-amd64-bin.tar.gz $ tar -xzf teleport-v${TELEPORT_VERSION?}-linux-amd64-bin.tar.gz $ cd teleport $ sudo ./install Teleport binaries have been copied to /usr/local/bin ``` * Google Cloud account with an AlloyDB cluster and instance deployed, configured for [IAM database authentication](https://cloud.google.com/alloydb/docs/database-users/manage-iam-auth). * `psql` installed and in your system `PATH`. * A host (e.g., a Compute Engine instance) to run the Teleport Database Service. * To check that you can connect to your Teleport cluster, sign in with `tsh login`, then verify that you can run `tctl` commands using your current credentials. For example, run the following command, assigning teleport.example.com to the domain name of the Teleport Proxy Service in your cluster and email\@example.com to your Teleport username: ``` $ tsh login --proxy=teleport.example.com --user=email@example.com $ tctl status Cluster teleport.example.com Version 19.0.0-dev CA pin sha256:abdc1245efgh5678abdc1245efgh5678abdc1245efgh5678abdc1245efgh5678 ``` If you can connect to the cluster and run the `tctl status` command, you can use your current credentials to run subsequent `tctl` commands from your workstation. If you host your own Teleport cluster, you can also run `tctl` commands on the computer that hosts the Teleport Auth Service for full permissions. ## Step 1/4. Configure IAM and create a database user In this step, you will create two required service accounts. - `teleport-db-service`: used by the Teleport Database Service to access AlloyDB metadata and generate tokens. - `alloydb-user`: used by end-users to authenticate to the database. ### Create a service account for the Teleport Database Service **Google Cloud Console** Go to [Service Accounts](https://console.cloud.google.com/iam-admin/serviceaccounts) and create a service account named `teleport-db-service`. Assign the predefined [`roles/alloydb.client`](https://cloud.google.com/alloydb/docs/reference/iam-roles-permissions) role. **gcloud CLI** Set project-id to your GCP project ID. ``` 1. Create the Service Account explicitly in the target project $ gcloud iam service-accounts create teleport-db-service \ --display-name="Teleport Database Service" \ --project=project-id 2. Grant the role to that specific account $ gcloud projects add-iam-policy-binding project-id \ --member="serviceAccount:teleport-db-service@project-id.iam.gserviceaccount.com" \ --role="roles/alloydb.client" ``` ### Create the database user account --- NOTE If you already have a GCP service account for database access with the required roles, you can use it instead. --- **Google Cloud Console** Go to [Service Accounts](https://console.cloud.google.com/iam-admin/serviceaccounts) and create a service account named `alloydb-user`. Assign these roles: - `roles/alloydb.databaseUser` - `roles/alloydb.client` - [`roles/serviceusage.serviceUsageConsumer`](https://cloud.google.com/service-usage/docs/access-control#serviceusage.serviceusageconsumer) Then, on the `alloydb-user` overview page, go to the "Principals with Access" tab, click "Grant Access", and add `teleport-db-service` with the **Service Account Token Creator** role. **gcloud CLI** ``` $ gcloud iam service-accounts create alloydb-user --display-name="AlloyDB User" --project=project-id $ for role in roles/alloydb.databaseUser roles/alloydb.client roles/serviceusage.serviceUsageConsumer; do \ gcloud projects add-iam-policy-binding project-id \ --member="serviceAccount:alloydb-user@project-id.iam.gserviceaccount.com" \ --role="$role"; \ done \ $ gcloud iam service-accounts add-iam-policy-binding \ alloydb-user@project-id.iam.gserviceaccount.com \ --member="serviceAccount:teleport-db-service@project-id.iam.gserviceaccount.com" \ --role="roles/iam.serviceAccountTokenCreator" ``` ### Add the IAM database user to AlloyDB --- NOTE Skip this if your AlloyDB instance already has an IAM user for this service account. --- Ensure [IAM authentication](https://cloud.google.com/alloydb/docs/database-users/manage-iam-auth) is enabled on your instance (the `alloydb.iam_authentication` flag must be set) before adding the User. --- INSTANCE RESTART REQUIRED Enabling the static `alloydb.iam_authentication` flag triggers a mandatory restart of the AlloyDB instance. This will cause a brief period of downtime (typically 60 - 120 seconds) as the instance performs a maintenance update. We recommend performing this during a scheduled maintenance window. --- **Google Cloud Console** 1. Go to the AlloyDB Clusters page. 2. Click Edit on your primary-instance, scroll to Advanced configuration options, and under Flags ensure `alloydb.iam_authentication` is present and set to on. 3. Go to the Users page of your AlloyDB instance. 4. Click Add User Account. 5. Choose Cloud IAM authentication. 6. In the Principal field, enter `alloydb-user@project-id.iam`. **gcloud CLI** Enable IAM authentication on your instance: ``` $ gcloud alloydb instances update instance-name \ --cluster=cluster-name \ --region=region \ --project=project-id \ --database-flags=alloydb.iam_authentication=on ``` --- WARNING If your instance already has custom database flags, include them in the `--database-flags` list along with `alloydb.iam_authentication=on`. Any flags you omit are reset to their default values. To review the instance's current manually set flags: ``` $ gcloud alloydb instances describe instance-name \ --cluster=cluster-name \ --region=region ``` --- Create the IAM-based database user to link the service account to the database: ``` $ gcloud alloydb users create alloydb-user@project-id.iam \ --cluster=cluster-name \ --region=region \ --project=project-id \ --type=IAM_BASED ``` ## Step 2/4. Create a Teleport Database Service host The Teleport Database Service must run on a host that can reach the AlloyDB instance and authenticate with GCP. --- NOTE If you already have a host running the Teleport Database Service with the `teleport-db-service` credentials, skip to Step 3. --- Create a GCE instance and attach the `teleport-db-service` service account in the "Identity and API access" section. Attaching the service account to an existing GCE instance **Google Cloud Console** 1. Navigate to [VM instances](https://console.cloud.google.com/compute/instances) and open your instance. 2. Stop the instance. 3. Edit the instance, find **Service account** under **Identity and API access**, and select `teleport-db-service`. 4. Save and restart. **gcloud CLI** If you have an existing GCE instance, you can attach the service account using the `gcloud` command-line tool. Set the variables: - instance-name instance name - zone instance zone - project-id GCP project ID ``` The instance must be stopped before modifying the service account 1. Stop the instance gcloud compute instances stop instance-name \ --project=project-id \ --zone=zone 2. Update the Service Account and Scopes gcloud compute instances set-service-account instance-name \ --service-account=teleport-db-service@project-id.iam.gserviceaccount.com \ --scopes=https://www.googleapis.com/auth/cloud-platform \ --project=project-id \ --zone=zone 3. Restart the instance gcloud compute instances start instance-name \ --project=project-id \ --zone=zone ``` Verify the instance is running with the correct service account and scopes: ``` $ gcloud compute instances describe instance-name --zone=zone \ --format="yaml(status,serviceAccounts)" ``` If the Database Service is running outside of GCE, use [workload identity federation](https://cloud.google.com/iam/docs/workload-identity-federation) to provide credentials. Using service account keys (not recommended for production) Create a JSON key for the `teleport-db-service` account. If you use `systemd` to start Teleport, add the environment variable to the service's `EnvironmentFile`: ``` $ echo 'GOOGLE_APPLICATION_CREDENTIALS=/path/to/credentials.json' | \ sudo tee -a /etc/default/teleport ``` --- WARNING Service account keys are a security risk. Use workload identity or attached service accounts in production. See [Google Cloud authentication docs](https://cloud.google.com/docs/authentication#service-accounts) for details. --- ## Step 3/4. Configure Teleport In this step, you will configure the Teleport Database Service to connect to AlloyDB and handle authentication and access on behalf of users. ### Install the Teleport Database Service To install a Teleport Agent on your Linux server: The recommended installation method is the cluster install script. It will select the correct version, edition, and installation mode for your cluster. 1. Assign teleport.example.com:443 to your Teleport cluster hostname and port, but not the scheme (https\://). 2. Run your cluster's install script: ``` $ curl "https://teleport.example.com:443/scripts/install.sh" | sudo bash ``` ### Create a join token The Database Service requires a valid join token to join your Teleport cluster. Run the following `tctl` command and save the token output in `/tmp/token` on the server that will run the Database Service: ``` $ tctl tokens add --type=db --format=text abcd123-insecure-do-not-use-this ``` ### Configure and start the Database Service In the command below, replace teleport.example.com:443 with the host and port of your Teleport Proxy Service or Enterprise Cloud site, and replace connection-uri with your AlloyDB connection URI. The connection URI has the format `projects/PROJECT-ID/locations/REGION/clusters/CLUSTER/instances/INSTANCE`. You can copy it from the AlloyDB instance details page in the Google Cloud console. ![AlloyDB Connection URI](/docs/assets/images/connection-uri-bd28375d3047632a4c28248c6cdc8b07.png) Run the command as follows. Make sure to include the mandatory `alloydb://` prefix in the specified URI. ``` $ sudo teleport db configure create \ -o file \ --name=alloydb \ --protocol=postgres \ --labels=env=dev \ --token=/tmp/token \ --proxy=teleport.example.com:443 \ --uri=alloydb://connection-uri ``` By default, Teleport uses the private AlloyDB endpoint. To use a [public](https://cloud.google.com/alloydb/docs/connect-public-ip) or [Private Service Connect (PSC)](https://cloud.google.com/alloydb/docs/about-private-service-connect) endpoint instead, set `endpoint_type` in the config: ``` db_service: resources: - name: alloydb protocol: postgres uri: alloydb://projects/PROJECT-ID/locations/REGION/clusters/CLUSTER/instances/INSTANCE gcp: alloydb: endpoint_type: public # private | public | psc ``` Create `alloydb.yaml`: ``` kind: db version: v3 metadata: name: alloydb-dynamic labels: env: dev spec: protocol: "postgres" uri: "alloydb://connection-uri" gcp: alloydb: endpoint_type: private ``` Apply it: ``` $ tctl create -f alloydb.yaml ``` Start the Database Service: Configure the Teleport Database Service to start automatically when the host boots up by creating a systemd service for it. The instructions depend on how you installed the Teleport Database Service. **Package Manager** On the host where you will run the Teleport Database Service, enable and start Teleport: ``` $ sudo systemctl enable teleport $ sudo systemctl start teleport ``` **TAR Archive** On the host where you will run the Teleport Database Service, create a systemd service configuration for Teleport, enable the Teleport service, and start Teleport: ``` $ sudo teleport install systemd -o /etc/systemd/system/teleport.service $ sudo systemctl enable teleport $ sudo systemctl start teleport ``` You can check the status of the Teleport Database Service with `systemctl status teleport` and view its logs with `journalctl -fu teleport`. ## Step 4/4. Connect to your database You will only be able to see databases that your Teleport role has access to. See our [RBAC guide](https://goteleport.com/docs/zero-trust-access/rbac-get-started.md) for more details. --- TIP To modify an existing user to provide access to the Database Service, see [Database Access Controls](https://goteleport.com/docs/enroll-resources/database-access/rbac.md) --- **Teleport Community Edition** Create a local Teleport user with the built-in `access` role: ``` $ tctl users add \ --roles=access \ --db-users="*" \ --db-names="*" \ alice ``` **Teleport Enterprise/Enterprise Cloud** Create a local Teleport user with the built-in `access` and `requester` roles: ``` $ tctl users add \ --roles=access,requester \ --db-users="*" \ --db-names="*" \ alice ``` | Flag | Description | | ------------ | ---------------------------------------------------------------------------------------------------------------------------------------- | | `--roles` | List of roles to assign to the user. The builtin `access` role allows them to connect to any database server registered with Teleport. | | `--db-users` | List of database usernames the user will be allowed to use when connecting to the databases. A wildcard allows any user. | | `--db-names` | List of logical databases (aka schemas) the user will be allowed to connect to within a database server. A wildcard allows any database. | --- WARNING Database names are only enforced for PostgreSQL, MongoDB, and Cloud Spanner databases. --- For more detailed information about database access controls and how to restrict access see [RBAC](https://goteleport.com/docs/enroll-resources/database-access/rbac.md) documentation. Log in and list databases: ``` $ tsh login --proxy=teleport.example.com --user=alice $ tsh db ls Name Description Labels ------- ----------- ------- alloydb GCP AlloyDB env=dev ``` The database user name is shown on the Users page of your AlloyDB instance. Connect using the service account name (minus `.gserviceaccount.com`): ``` $ tsh db connect --db-user=alloydb-user@project-id.iam --db-name=postgres alloydb ``` --- TIP From version `17.1`, you can also [connect via the Web UI](https://goteleport.com/docs/connect-your-client/teleport-clients/web-ui.md#starting-a-database-session). --- To log out: ``` $ tsh db logout alloydb Or for all databases: $ tsh db logout ``` ## Optional: least-privilege access When possible, enforce least-privilege by defining custom IAM roles that grant only the required permissions. ### Custom role for the Teleport Database Service The Teleport Database Service, running as the `teleport-db-service` service account, needs permissions to access the AlloyDB instance. Create a custom role with the following permissions: ``` # Used to generate client certificate alloydb.clusters.generateClientCertificate # Used to fetch connection information alloydb.instances.connect ``` For impersonating the `alloydb-user` service account, the built-in "Service Account Token Creator" IAM role is broader than necessary. To restrict permissions for that service account, create a custom role that includes only: ``` iam.serviceAccounts.getAccessToken ``` ### Custom role for the database user The `alloydb-user` service account used for database access requires permissions to connect to the instance and authenticate as a database user. Create a custom role with: ``` alloydb.instances.connect alloydb.users.login serviceusage.services.use ``` ## Troubleshooting ## Next steps - Learn more about [IAM authentication for AlloyDB](https://cloud.google.com/alloydb/docs/database-users/manage-iam-auth). - Learn more about [service account authentication](https://cloud.google.com/docs/authentication#service-accounts) in Google Cloud. - Learn more about AlloyDB [Auth Proxy permissions](https://cloud.google.com/alloydb/docs/auth-proxy/connect#required-iam-permissions).