Database Access with Redis

If you want to configure Redis Cluster, please read Database Access with Redis Cluster.

Teleport can provide secure access to Redis via the Teleport Database Service. This allows for fine-grained access control through the Teleport RBAC system.

The Teleport Database Service proxies traffic from database clients to self-hosted databases in your infrastructure. Teleport maintains a certificate authority (CA) for database clients. You configure your database to trust the Teleport database client CA, and the Teleport Database Service presents certificates signed by this CA when proxying user traffic. With this setup, there is no need to store long-lived credentials for self-hosted databases.

Meanwhile, the Teleport Database Service verifies self-hosted databases by checking their TLS certificates against either the Teleport database CA or a custom CA used with the database.

In this guide, you will:

1. Configure your Redis database for Teleport access.
2. Add the database to your Teleport cluster.
3. Connect to the database via Teleport.

How it works

The Teleport Database Service authenticates to your self-hosted Redis database using mutual TLS. Redis trusts the Teleport certificate authority for database clients, and presents a certificate signed by either the Teleport database CA or a custom CA. When a user initiates a database session, the Teleport Database Service presents a certificate signed by Teleport. The authenticated connection then proxies client traffic from the user.

• Self-Hosted
• Teleport Cloud

Prerequisites

• A running Teleport cluster version 16.4.12 or above. If you want to get started with Teleport, sign up for a free trial or set up a demo environment.

• The tctl admin tool and tsh client tool.

  Visit Installation for instructions on downloading tctl and tsh.

• Redis version 6.0 or newer.

  Note

  RESP3 (REdis Serialization Protocol) is currently not supported.

• redis-cli version 6.2 or newer installed and added to your system's PATH environment variable.

• A host where you will run the Teleport Database Service.

  See Installation for details.

• Optional: a certificate authority that issues certificates for your self-hosted database.

• 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:

  tsh login --proxy=teleport.example.com --user=[email protected]
  tctl status
  Cluster  teleport.example.com
  Version  16.4.12
  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 1/5. Set up the Teleport Database Service

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

Install and configure Teleport where you will run the Teleport Database Service:

sudo teleport db configure create \   -o file \   --token=/tmp/token \   --proxy=example.teleport.sh \   --name=example-redis \   --protocol=redis \   --uri=rediss://redis.example.com:6379 \   --labels=env=dev 

sudo teleport db configure create \   -o file \   --token=/tmp/token \   --proxy=example.teleport.sh:443 \   --name=example-redis \   --protocol=redis \   --uri=rediss://redis.example.com:6379 \   --trust_system_cert_pool \   --labels=env=dev

sudo systemctl enable teleport
sudo systemctl start teleport

sudo teleport install systemd -o /etc/systemd/system/teleport.service
sudo systemctl enable teleport
sudo systemctl start teleport

helm repo add teleport https://charts.releases.teleport.dev

helm repo update

roles: db
proxyAddr: example.teleport.sh
# Set to false if using Teleport Community Edition
enterprise: true
authToken: "JOIN_TOKEN"
databases:
  - name: example-redis
    uri: rediss://redis.example.com:6379
    protocol: redis
    static_labels:
      env: dev

Step 2/5. Create a Teleport user

tctl users add \  --roles=access \  --db-users="*" \  --db-names="*" \  alice

tctl users add \  --roles=access,requester \  --db-users="*" \  --db-names="*" \  alice

For more detailed information about database access controls and how to restrict access see RBAC documentation.

Step 3/5. Create Redis users

Each Redis user must be protected by a strong password. We recommend using OpenSSL to generate passwords:

openssl rand -hex 32

ACL GENPASS

Create a users.acl file, which defines users for your Redis deployment, passwords required to log in as a given user, and sets of ACL rules. Redis allows you to provide passwords in plaintext or an SHA256 hash. We strongly recommend using an SHA256 hash instead of plaintext passwords.

You can use the command below to generate an SHA256 hash from a password.

echo -n STRONG_GENERATED_PASSWORD | sha256sum

user alice on #57639ed88a85996453555f22f5aa4147b4c9614056585d931e5d976f610651e9 allcommands allkeys
user default off

For more ACL examples refer to the Redis documentation.

Step 4/5. Set up mutual TLS

Teleport uses mutual TLS authentication with self-hosted databases. These databases must be able to verify certificates presented by the Teleport Database Service. Self-hosted databases also need a certificate/key pair that Teleport can verify.

By default, the Teleport Database Service trusts certificates issued by a certificate authority managed by the Teleport Auth Service. You can either:

• Configure your self-hosted database to trust this CA, and instruct Teleport to issue a certificate for the database to present to the Teleport Database Service.
• Configure the Database Service to trust a custom CA.

You will need these files to enable mutual TLS on your Redis server.

Use the generated secrets to enable mutual TLS in your redis.conf configuration file and restart the database:

tls-port 6379
port 0
aclfile /path/to/users.acl
tls-ca-cert-file /path/to/server.cas
tls-cert-file /path/to/server.crt
tls-key-file /path/to/server.key
tls-protocols "TLSv1.2 TLSv1.3"

Once mutual TLS has been enabled, you will no longer be able to connect to the cluster without providing a valid client certificate. You can use the tls-auth-clients optional setting to allow connections from clients that do not present a certificate.

See TLS Support in the Redis documentation for more details.

Step 5/5. Connect

Log into your Teleport cluster and see available databases:

tsh login --proxy=teleport.example.com --user=alice
tsh db ls
Name          Description     Labels
------------- --------------- --------
example-redis Example Redis   env=dev

tsh login --proxy=mytenant.teleport.sh --user=alice
tsh db ls
Name          Description     Labels
------------- --------------- --------
example-redis Example Redis   env=dev

To connect to a particular database instance:

tsh db connect example-redis

You can optionally specify the database user to use by default when connecting to the database instance:

tsh db connect --db-user=alice example-redis

If flag --db-user is not provided, Teleport logs in as the default user.

Now you can log in as the previously created user using the below command:

AUTH alice STRONG_GENERATED_PASSWORD

To log out of the database and remove credentials:

Remove credentials for a particular database instance.
tsh db logout example-redis
Remove credentials for all database instances.
tsh db logout

Supported Redis commands

Redis in standalone mode doesn't support the commands below. If one of the listed commands is called Teleport returns the ERR Teleport: not supported by Teleport error.

• HELLO
• PUNSUBSCRIBE
• SSUBSCRIBE
• SUNSUBSCRIBE

Next steps

• Learn how to restrict access to certain users and databases.

• View the High Availability (HA) guide.

• Take a look at the YAML configuration reference.

• See the full CLI reference.