Configure Druid and Superset Metadata Stores in Postgres

Druid and Superset require a relational data store to store metadata. To use Postgres for this, install Postgres and create a database for the Druid metastore. If you have already created a data store using MySQL, you do not need to configure additional metadata stores in Postgres.

1. Log in to Postgres:

   sudo su postgres
   psql

2. Create a database, user, and password, each called druid, and assign database privileges to the user druid:

   create database druid;
   CREATE USER druid WITH PASSWORD 'druid';
   GRANT ALL PRIVILEGES ON DATABASE  "druid" to druid;

3. Create a database, user, and password, each called superset, and assign database privileges to the user superset:

   create database superset;
   CREATE USER superset WITH PASSWORD 'superset';
   GRANT ALL PRIVILEGES ON DATABASE "superset" to superset;