diff --git a/postgres/docker-entrypoint-initdb.d/init_keycloak_db.sh b/postgres/docker-entrypoint-initdb.d/init_keycloak_db.sh
new file mode 100755
index 00000000..70661017
--- /dev/null
+++ b/postgres/docker-entrypoint-initdb.d/init_keycloak_db.sh
@@ -0,0 +1,44 @@
+#!/bin/bash
+#
+# Copy createdb.sh.example to createdb.sh
+# then uncomment then set database name and username to create you need databases
+#
+# example: .env POSTGRES_USER=appuser and need db name is myshop_db
+# 
+#    psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
+#        CREATE USER myuser WITH PASSWORD 'mypassword';
+#        CREATE DATABASE myshop_db;
+#        GRANT ALL PRIVILEGES ON DATABASE myshop_db TO myuser;
+#    EOSQL
+#
+# this sh script will auto run when the postgres container starts and the $DATA_PATH_HOST/postgres not found.
+#
+# 
+# psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
+#     CREATE USER db1 WITH PASSWORD 'db1';
+#     CREATE DATABASE db1;
+#     GRANT ALL PRIVILEGES ON DATABASE db1 TO db1;
+# EOSQL
+# 
+# psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
+#     CREATE USER db2 WITH PASSWORD 'db2';
+#     CREATE DATABASE db2;
+#     GRANT ALL PRIVILEGES ON DATABASE db2 TO db2;
+# EOSQL
+# 
+# psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
+#     CREATE USER db3 WITH PASSWORD 'db3';
+#     CREATE DATABASE db3;
+#     GRANT ALL PRIVILEGES ON DATABASE db3 TO db3;
+# EOSQL
+# 
+### default database and user for keycloak ##############################################
+if [ "$KEYCLOAK_POSTGRES_INIT" == 'true' ]; then
+	psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
+		CREATE USER $KEYCLOAK_POSTGRES_USER WITH PASSWORD '$KEYCLOAK_POSTGRES_PASSWORD';
+		CREATE DATABASE $KEYCLOAK_POSTGRES_DB;
+		GRANT ALL PRIVILEGES ON DATABASE $KEYCLOAK_POSTGRES_DB TO $KEYCLOAK_POSTGRES_USER;
+		ALTER ROLE $KEYCLOAK_POSTGRES_USER CREATEROLE SUPERUSER;
+	EOSQL
+	echo
+fi