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Nexus/scripts/harden-postgres.sh
Hartmut 19aeb2ba04
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rename(phase 3): compose/DB/infra + stray code refs capakraken → nexus (#62)
rename(phase 3): compose/DB/infra + stray code refs capakraken → nexus (#62)

Co-authored-by: Hartmut Nörenberg <hn@hartmut-noerenberg.com>
Co-committed-by: Hartmut Nörenberg <hn@hartmut-noerenberg.com>
2026-05-21 20:07:18 +02:00

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#!/usr/bin/env bash
# Remove SUPERUSER from the application database user
# Run after initial setup: bash scripts/harden-postgres.sh
DB_USER="${DB_USER:-nexus}"
DB_NAME="${DB_NAME:-nexus}"
echo "Hardening PostgreSQL for $DB_USER..."
# Remove SUPERUSER privilege
docker compose exec -T postgres psql -U postgres -c "ALTER USER $DB_USER NOSUPERUSER;"
# Grant only needed permissions
docker compose exec -T postgres psql -U postgres -d $DB_NAME -c "
GRANT CONNECT ON DATABASE $DB_NAME TO $DB_USER;
GRANT USAGE ON SCHEMA public TO $DB_USER;
GRANT SELECT, INSERT, UPDATE, DELETE ON ALL TABLES IN SCHEMA public TO $DB_USER;
GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA public TO $DB_USER;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT, INSERT, UPDATE, DELETE ON TABLES TO $DB_USER;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT USAGE, SELECT ON SEQUENCES TO $DB_USER;
"
echo "Done. $DB_USER no longer has SUPERUSER."