Docker entrypoint exec_sql hardcodes postgres/password credentials, ignoring DOLTGRES_USER/DOLTGRES_PASSWORD

[johannesdb]

Description

The exec_sql function in docker-entrypoint.sh hardcodes PGPASSWORD=password and -U postgres when connecting via psql. This means that when DOLTGRES_USER is set to a custom value, init scripts in /docker-entrypoint-initdb.d/ silently fail because the postgres user no longer exists.

Reproduction

# docker-compose.yml
services:
  db:
    image: dolthub/doltgresql:latest
    environment:
      DOLTGRES_USER: myuser
      DOLTGRES_PASSWORD: mypassword
    volumes:
      - ./init.sql:/docker-entrypoint-initdb.d/init.sql:ro

-- init.sql
CREATE TABLE test (id UUID PRIMARY KEY DEFAULT gen_random_uuid());

Result: The entrypoint reports running the init script, but the SQL never executes because psql -U postgres with PGPASSWORD=password fails authentication. The exec_sql retry loop silently retries until timeout or until a non-matching error pattern is hit.

Root cause

In docker-entrypoint.sh, the exec_sql function (around line 90):

output=$(PGPASSWORD=password psql -h 127.0.0.1 -U postgres -c "$query" 2>&1)

This should use the configured DOLTGRES_USER and DOLTGRES_PASSWORD values instead of hardcoded defaults.

Expected behavior

exec_sql should connect using the credentials from DOLTGRES_USER/DOLTGRES_PASSWORD (or their POSTGRES_* equivalents), falling back to postgres/password only if unset.

Workaround

Don't set DOLTGRES_USER/DOLTGRES_PASSWORD. Use the default postgres/password credentials and create custom users in the init script instead.

Environment

• DoltgreSQL version: 0.54.10
• Docker image: dolthub/doltgresql:latest

[Hydrocharged]

Pinging @zachmu , he would be the best one to help you here.