PostgreSQL

PostgreSQL database secrets engine

PostgreSQL is one of the supported plugins for the database secrets engine. This plugin generates database credentials dynamically based on configured roles for the PostgreSQL database, and also supports Static Roles.

Capabilities

Setup

1. Enable the database secrets engine if it is not already enabled:

   $ d8 stronghold secrets enable database
   Success! Enabled the database secrets engine at: database/
   

   By default, the secrets engine will enable at the name of the engine. To enable the secrets engine at a different path, use the -path argument.

2. Configure Stronghold with the proper plugin and connection information:

   $ d8 stronghold write database/config/my-postgresql-database \
       plugin_name="postgresql-database-plugin" \
       allowed_roles="my-role" \
       connection_url="postgresql://{{username}}:{{password}}@localhost:5432/database-name" \
       username="strongholduser" \
       password="strongholdpass" \
       password_authentication="scram-sha-256"
   

3. Configure a role that maps a name in Stronghold to an SQL statement to execute to create the database credential:

   $ d8 stronghold write database/roles/my-role \
       db_name="my-postgresql-database" \
       creation_statements="CREATE ROLE \"{{name}}\" WITH LOGIN PASSWORD '{{password}}' VALID UNTIL '{{expiration}}'; \
           GRANT SELECT ON ALL TABLES IN SCHEMA public TO \"{{name}}\";" \
       default_ttl="1h" \
       max_ttl="24h"
   Success! Data written to: database/roles/my-role
   

Usage

After the secrets engine is configured and a user/machine has an Stronghold token with the proper permission, it can generate credentials.

1. Generate a new credential by reading from the /creds endpoint with the name of the role:

   $ d8 stronghold read database/creds/my-role
   Key                Value
   ---                -----
   lease_id           database/creds/my-role/2f6a614c-4aa2-7b19-24b9-ad944a8d4de6
   lease_duration     1h
   lease_renewable    true
   password           SsnoaA-8Tv4t34f41baD
   username           v-strongholduse-my-role-x