Add PostgreSQL demo container

demo/postgresql/docker-compose.yml

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+version: "3.3"
+
+services:
+  postgresql:
+    build: ./postgresql/
+    environment:
+     - POSTGRES_PASSWORD=password
+    expose:
+     - 5432
+    ports:
+     - 5432:5432
+    networks:
+     - net
+    volumes:
+     - data:/var/lib/postgresql/data
+
+
+networks:
+  net:
+    driver: bridge
+
+volumes:
+  data:

demo/postgresql/midpoint-additions-for-standalone-run.yml

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+#
+# This is a file with additions to ../midpoint/docker-compose.yml file, to be used in the following way:
+#
+# (in this directory)
+#
+# $ docker-compose up --build
+#
+# (in ../midpoint directory)
+#
+# $ docker-compose -f docker-compose.yml -f ../demo/postgresql/midpoint-additions-for-standalone-run.yml up --build
+#
+# It expects that PostgreSQL is started independently of midPoint. When executing the containers in this way, there are two compositions with the following containers:
+#
+# "midpoint"
+#
+# 1) midpoint-server
+# 2) midpoint-data    <-- this is the original MariaDB container; it will execute command of 'true' i.e. exiting just upon the startup
+#
+# "postgresql"
+#
+# 1) postgresql
+#
+
+version: "3.3"
+
+services:
+  midpoint-server:
+    environment:
+     - REPO_DATABASE_TYPE=postgresql
+     - REPO_HOST=postgresql
+     - REPO_PORT=5432
+     - REPO_DATABASE=midpoint
+     - REPO_USER=midpoint
+    networks:
+     - postgresql_net
+
+  # effectively disable original MariaDB service
+  midpoint-data:
+    image: alpine:latest
+    command: "true"
+    entrypoint: "true"
+
+networks:
+  postgresql_net:
+    external: true

demo/postgresql/midpoint-additions.yml

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+#
+# This is a file with additions to ../midpoint/docker-compose.yml file, to be used in the following way:
+#
+# (in ../midpoint directory)
+#
+# $ docker-compose -f docker-compose.yml -f ../demo/postgresql/midpoint-additions.yml up --build
+#
+# It expects that PostgreSQL is started as part of midPoint composition. So there will be three containers there:
+#
+# 1) midpoint-server
+# 2) postgresql
+# 3) midpoint-data    <-- this is the original MariaDB container; it will execute command of 'true' i.e. exiting just upon the startup
+#
+
+version: "3.3"
+
+services:
+  postgresql:
+    build: ../demo/postgresql/postgresql/
+    entrypoint: ["/docker-entrypoint.sh", "postgres"]           # for some reasons this is needed for the correct initialization
+    environment:
+     - POSTGRES_PASSWORD=password
+    expose:
+     - 5432
+    ports:
+     - 5432:5432
+    networks:
+     - back
+    volumes:
+     - postgresql_data:/var/lib/postgresql/data
+
+  midpoint-server:
+    environment:
+     - REPO_DATABASE_TYPE=postgresql
+     - REPO_HOST=postgresql
+     - REPO_PORT=5432
+     - REPO_DATABASE=midpoint
+     - REPO_USER=midpoint
+
+  # effectively disable original MariaDB service
+  midpoint-data:
+    image: alpine:latest
+    command: "true"
+    entrypoint: "true"
+
+volumes:
+  postgresql_data:

demo/postgresql/postgresql/Dockerfile

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+FROM postgres:9.5
+
+COPY container_files/* /docker-entrypoint-initdb.d/

demo/postgresql/postgresql/container_files/init-user-db.sh

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+#!/bin/bash
+set -e
+
+echo Creating midPoint user and database
+
+psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
+    CREATE USER midpoint WITH PASSWORD '456654' LOGIN SUPERUSER;
+    CREATE DATABASE midpoint WITH OWNER = midpoint ENCODING = 'UTF8' TABLESPACE = pg_default LC_COLLATE = 'en_US.utf8' LC_CTYPE = 'en_US.utf8' CONNECTION LIMIT = -1;
+EOSQL
+
+echo midPoint user and database were created
+