Fork me on GitHub

Teleport

Database Access with AWS ElastiCache and AWS MemoryDB for Redis

Improve

This guide will help you to:

  • Install Teleport 11.1.0.
  • Set up Teleport to access your ElastiCache and MemoryDB for Redis clusters.
  • Connect to your clusters through Teleport.

Teleport Database Access RDS Self-Hosted

Prerequisites

  • AWS account with at least one ElastiCache or MemoryDB for Redis clusters In-transit encryption via (TLS) must be enabled.
  • Permissions to create and attach IAM policies.
  • redis-cli version 6.2 or newer installed and added to your system's PATH environment variable.
  • A host, e.g., an EC2 instance, where you will run the Teleport Database Service.

Step 1/7. Install Teleport

On the host where you will run the Auth Service and Proxy Service, download the latest version of Teleport for your platform from our downloads page and follow the installation instructions.

Teleport requires a valid TLS certificate to operate and can fetch one automatically using Let's Encrypt's ACME protocol. Before Let's Encrypt can issue a TLS certificate for the Teleport Proxy host's domain, the ACME protocol must verify that an HTTPS server is reachable on port 443 of the host.

You can configure the Teleport Proxy service to complete the Let's Encrypt verification process when it starts up.

Run the following teleport configure command, where tele.example.com is the domain name of your Teleport cluster and [email protected] is an email address used for notifications (you can use any domain):

teleport configure --acme [email protected] --cluster-name=tele.example.com > /etc/teleport.yaml

The --acme, --acme-email, and --cluster-name flags will add the following settings to your Teleport configuration file:

proxy_service:
  enabled: "yes"
  web_listen_addr: :443
  public_addr: tele.example.com:443
  acme:
    enabled: "yes"
    email: [email protected]

Port 443 on your Teleport Proxy Service host must allow traffic from all sources.

Next, start the Teleport Auth and Proxy Services:

sudo teleport start

If you do not have a Teleport Cloud account, use our signup form to get started. Teleport Cloud manages instances of the Proxy Service and Auth Service, and automatically issues and renews the required TLS certificate.

To connect to Teleport, log in to your cluster using tsh, then use tctl remotely:

tsh login --proxy=teleport.example.com [email protected]
tctl status

Cluster teleport.example.com

Version 11.1.0

CA pin sha256:abdc1245efgh5678abdc1245efgh5678abdc1245efgh5678abdc1245efgh5678

You can run subsequent tctl commands in this guide on your local machine.

For full privileges, you can also run tctl commands on your Auth Service host.

To connect to Teleport, log in to your cluster using tsh, then use tctl remotely:

tsh login --proxy=myinstance.teleport.sh [email protected]
tctl status

Cluster myinstance.teleport.sh

Version 10.3.8

CA pin sha256:sha-hash-here

You must run subsequent tctl commands in this guide on your local machine.

Step 2/7. Create a Teleport user

Tip

To modify an existing user to provide access to the Database Access service, see Database Access Access Controls

Create a local Teleport user with the built-in access role:

tctl users add \ --roles=access \ --db-users=\* \ --db-names=\* \ alice
FlagDescription
--rolesList of roles to assign to the user. The builtin access role allows them to connect to any database server registered with Teleport.
--db-usersList of database usernames the user will be allowed to use when connecting to the databases. A wildcard allows any user.
--db-namesList 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 and MongoDB databases.

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

Step 3/7. Create a Database Service configuration

The Database Service requires a valid auth token to connect to the cluster. Generate one by running the following command against your Teleport Auth Service and save it in /tmp/token on the node that will run the Database Service:

tctl tokens add --type=db

Install Teleport on the host where you will run the Teleport Database Service:

Download Teleport's PGP public key

sudo curl https://apt.releases.teleport.dev/gpg \ -o /usr/share/keyrings/teleport-archive-keyring.asc

Source variables about OS version

source /etc/os-release

Add the Teleport APT repository for v11. You'll need to update this

file for each major release of Teleport.

Note: if using a fork of Debian or Ubuntu you may need to use '$ID_LIKE'

and the codename your distro was forked from instead of '$ID' and '$VERSION_CODENAME'.

Supported versions are listed here: https://github.com/gravitational/teleport/blob/master/build.assets/tooling/cmd/build-os-package-repos/runners.go#L42-L67

echo "deb [signed-by=/usr/share/keyrings/teleport-archive-keyring.asc] \ https://apt.releases.teleport.dev/${ID?} ${VERSION_CODENAME?} stable/v11" \ | sudo tee /etc/apt/sources.list.d/teleport.list > /dev/null

sudo apt-get update
sudo apt-get install teleport

Source variables about OS version

source /etc/os-release

Add the Teleport YUM repository for v11. You'll need to update this

file for each major release of Teleport.

Note: if using a fork of RHEL/CentOS or Amazon Linux you may need to use '$ID_LIKE'

and the codename your distro was forked from instead of '$ID'

Supported versions are listed here: https://github.com/gravitational/teleport/blob/master/build.assets/tooling/cmd/build-os-package-repos/runners.go#L133-L153

sudo yum-config-manager --add-repo $(rpm --eval "https://yum.releases.teleport.dev/$ID/$VERSION_ID/Teleport/%{_arch}/stable/v11/teleport.repo")
sudo yum install teleport

Tip: Add /usr/local/bin to path used by sudo (so 'sudo tctl users add' will work as per the docs)

echo "Defaults secure_path = /sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin" > /etc/sudoers.d/secure_path

Optional: Using DNF on newer distributions

$ sudo dnf config-manager --add-repo https://rpm.releases.teleport.dev/teleport.repo

$ sudo dnf install teleport

curl https://get.gravitational.com/teleport-v11.1.0-linux-amd64-bin.tar.gz.sha256

<checksum> <filename>

curl -O https://get.gravitational.com/teleport-v11.1.0-linux-amd64-bin.tar.gz
shasum -a 256 teleport-v11.1.0-linux-amd64-bin.tar.gz

Verify that the checksums match

tar -xzf teleport-v11.1.0-linux-amd64-bin.tar.gz
cd teleport
sudo ./install
curl https://get.gravitational.com/teleport-v11.1.0-linux-arm-bin.tar.gz.sha256

<checksum> <filename>

curl -O https://get.gravitational.com/teleport-v11.1.0-linux-arm-bin.tar.gz
shasum -a 256 teleport-v11.1.0-linux-arm-bin.tar.gz

Verify that the checksums match

tar -xzf teleport-v11.1.0-linux-arm-bin.tar.gz
cd teleport
sudo ./install
curl https://get.gravitational.com/teleport-v11.1.0-linux-arm64-bin.tar.gz.sha256

<checksum> <filename>

curl -O https://get.gravitational.com/teleport-v11.1.0-linux-arm64-bin.tar.gz
shasum -a 256 teleport-v11.1.0-linux-arm64-bin.tar.gz

Verify that the checksums match

tar -xzf teleport-v11.1.0-linux-arm64-bin.tar.gz
cd teleport
sudo ./install

Using this APT repo may result in breaking upgrades upon "apt upgrade" as all major versions will be

published under the same component. We recommend following the instructions in the

"Debian/Ubuntu (DEB)" tab instead.

Download Teleport's PGP public key

sudo curl https://deb.releases.teleport.dev/teleport-pubkey.asc \ -o /usr/share/keyrings/teleport-archive-keyring.asc

Add the Teleport APT repository

echo "deb [signed-by=/usr/share/keyrings/teleport-archive-keyring.asc] https://deb.releases.teleport.dev/ stable main" \ | sudo tee /etc/apt/sources.list.d/teleport.list > /dev/null

sudo apt-get update
sudo apt-get install teleport
sudo yum-config-manager --add-repo https://rpm.releases.teleport.dev/teleport.repo
sudo yum install teleport

Optional: Using DNF on newer distributions

$ sudo dnf config-manager --add-repo https://rpm.releases.teleport.dev/teleport.repo

$ sudo dnf install teleport

Create the Database Service configuration:

teleport db configure create \ -o file \ --proxy=teleport.example.com:3080 \ --token=/tmp/token \ --elasticache-discovery=us-west-1
teleport db configure create \ -o file \ --proxy=teleport.example.com:3080 \ --token=/tmp/token \ --memorydb-discovery=us-west-1

The command will generate a Database Service configuration with ElastiCache or MemoryDB database auto-discovery enabled on the us-west-1 region and place it at the /etc/teleport.yaml location.

Step 4/7. Create an IAM policy for Teleport

Teleport needs AWS IAM permissions to be able to:

  • Discover and register ElastiCache and MemoryDB for Redis clusters.
  • Modify ElastiCache and MemoryDB user passwords for Teleport-managed users.
  • Save user passwords in AWS Secrets Manager for Teleport-managed users.

Teleport can bootstrap IAM permissions for the Database Service based on its configuration using the teleport db configure bootstrap command. You can use this command in automatic or manual mode:

  • In automatic mode, Teleport will attempt to create appropriate IAM policies and attach them to the specified IAM identity (user or role). This requires IAM permissions to create and attach IAM policies.
  • In manual mode, Teleport will print required IAM policies. You can then create and attach them manually using the AWS management console.
AWS credentials

AWS Credentials are only required if you’re running the command in "automatic" mode. The command uses the default credential provider chain to find AWS credentials. See Specifying Credentials for more information.

Run one of the following commands on your Database Service node:

Use this command to bootstrap the permissions automatically when your Teleport Database Service runs as an IAM user (for example, uses an AWS credentials file).

teleport db configure bootstrap -c /etc/teleport.yaml --attach-to-user TeleportUser

Use this command to bootstrap the permissions automatically when your Teleport Database Service runs as an IAM role (for example, on an EC2 instance with an attached IAM role).

teleport db configure bootstrap -c /etc/teleport.yaml --attach-to-role TeleportRole

Use this command to display required IAM policies which you will then create in your AWS console:

teleport db configure bootstrap -c /etc/teleport.yaml --manual

See the full bootstrap command reference.

Step 5/7. Start the Database Service

Start the Database Service:

teleport start --config=/etc/teleport.yaml

The Database Service will discover and register all ElastiCache and MemoryDB for Redis clusters according to the configuration.

Step 6/7. Create a Teleport-managed ElastiCache or MemoryDB user (optional)

To provide better security, it is recommended to use Redis ACL for authentication with Redis and let Teleport manage the users. The Teleport Database Service constantly rotates any passwords managed by Teleport, saves these passwords in AWS Secrets Manager, and automatically sends an AUTH command with the saved password when connecting the client to the Redis server.

To enable Redis ACL, please see Authenticating users with Role-Based Access Control for ElastiCache and Authenticating users with Access Control Lists for MemoryDB.

Once an ElastiCache or MemoryDB user is created with the desired access, add an AWS resource tag teleport.dev/managed with the value true to this user:

Managed User Tag

The Database Service will automatically discover this user if it is associated with a registered database. Keep in mind that it may take the Database Service some time (up to 20 minutes) to discover this user once the tag is added.

Step 7/7. Connect

Once the Database Service has started and joined the cluster, log in to see the registered databases:

tsh login --proxy=teleport.example.com --user=alice
tsh db ls

Name Description Labels

--------------------------- --------------------------------------------------------- --------

my-cluster-mode-elasticache ElastiCache cluster in us-west-1 (configuration endpoint) ...

my-elasticache ElastiCache cluster in us-west-1 (primary endpoint) ...

my-elasticache-reader ElastiCache cluster in us-west-1 (reader endpoint) ...

my-memorydb MemoryDB cluster in us-west-1 ...

Note

You can override the database name by applying the teleport.dev/database_name AWS tag to the resource. The value of the tag will be used as the database name.

To retrieve credentials for a database and connect to it:

tsh db connect --db-user=my-database-user my-elasticache

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

Now, depending on the authentication configurations, you may need to send an AUTH command to authenticate with the Redis server:

The Database Service automatically authenticates Teleport-managed users with the Redis server. No AUTH command is required after successful connection.

If you are connecting as a non-Teleport-managed user, the connection normally starts as the default user. Now you can authenticate the database user with its password:

AUTH my-database-user <USER_PASSWORD>

Now you can authenticate with the shared AUTH token:

AUTH <SHARED_AUTH_TOKEN>

For Redis deployments without the ACL system or legacy requirepass directive enabled, no AUTH command is required.

To log out of the database and remove credentials:

Remove credentials for a particular database instance.

tsh db logout my-elasticache

Remove credentials for all database instances.

tsh db logout

Troubleshooting

Certificate error

If your tsh db connect error includes the following text, you likely have an RDS database created before July 28, 2020, which presents an X.509 certificate that is incompatible with Teleport:

x509: certificate relies on legacy Common Name field, use SANs instead

AWS provides instructions to rotate your SSL/TLS certificate.

No credential providers error

If you see the error NoCredentialProviders: no valid providers in chain in Database Service logs then Teleport is not detecting the required credentials to connect via AWS IAM permissions. Check whether the credentials or security role has been applied in the machine running the Teleport Database Service.

Timeout errors

The Teleport Database Service needs connectivity to your database endpoints. That may require enabling inbound traffic on the database from the Database Service on the same VPC or routing rules from another VPC. Using the nc program you can verify connections to databases:

nc -zv postgres-instance-1.sadas.us-east-1.rds.amazonaws.com 5432

Connection to postgres-instance-1.sadas.us-east-1.rds.amazonaws.com (172.31.24.172) 5432 port [tcp/postgresql] succeeded!

Next steps

  • Take a look at the YAML configuration reference.