feat: use single container for all postgresql databases

- now all the services may use the same port 5432 and don't have to be additionally configured
- docker compose became lighter as we use one container for 3 databases instead of 3 containers

Author: maxceem

README.md

@@ -54,7 +54,6 @@ Local setup should work good on **Linux** and **macOS**. But **Windows** is not
       |  Service | Name | Port  |
       |----------|:-----:|:----:|
       | PostgreSQL | db | 5432 |
-      | PostgreSQL (for tests) | db_test | 5432 |
       | Elasticsearch | esearch | 9200 |
       | RabbitMQ | queue | 5672, 15672  |
       | Mock Service (not in use) | jsonserver | 3001  |
@@ -105,7 +104,6 @@ Local setup should work good on **Linux** and **macOS**. But **Windows** is not
       |  Service | Name | Port  |
       |----------|:-----:|:----:|
       | PostgreSQL | db | 5432 |
-      | PostgreSQL (for tests) | db_test | 5432 |
       | Elasticsearch | esearch | 9200 |
       | RabbitMQ | queue | 5672, 15672  |
       | Mock Service (not in use) | jsonserver | 3001  |

config/test.json

@@ -17,7 +17,7 @@
     "rabbitmqUrl": "amqp://localhost:5672",
     "connectProjectsUrl": "https://local.topcoder-dev.com/projects/",
     "dbConfig": {
-        "masterUrl": "postgres://coder:mysecretpassword@localhost:5433/projectsdb_test",
+        "masterUrl": "postgres://coder:mysecretpassword@localhost:5432/projectsdb_test",
         "maxPoolSize": 50,
         "minPoolSize": 4,
         "idleTimeout": 1000

local/docker-compose.yml

@@ -5,21 +5,13 @@ services:
     ports:
       - "3001:3001"
   db:
-    image: "postgres:9.5"
+    build: "postgres-db"
     ports:
       - "5432:5432"
     environment:
       - POSTGRES_PASSWORD=mysecretpassword
       - POSTGRES_USER=coder
-      - POSTGRES_DB=projectsdb
-  db_test:
-    image: "postgres:9.5"
-    ports:
-      - "5433:5432"
-    environment:
-      - POSTGRES_PASSWORD=mysecretpassword
-      - POSTGRES_USER=coder
-      - POSTGRES_DB=projectsdb_test
+      - POSTGRES_MULTIPLE_DATABASES=projectsdb,projectsdb_test
   esearch:
     image: "elasticsearch:2.3"
     ports:

local/full/docker-compose.base.yml

@@ -15,7 +15,7 @@ services:
       - TC_API_V3_BASE_URL=https://api.topcoder-dev.com/v3
       - KAFKA_URL=kafka:9093
       - AUTH_SECRET=secret
-      - DATABASE_URL=postgresql://coder:mysecretpassword@notifications_db:5432/tc_notifications
+      - DATABASE_URL=postgresql://coder:mysecretpassword@db:5432/tc_notifications
       - JWKS_URI=test
       - LOG_LEVEL=debug
       - ENV=development

local/full/docker-compose.yml

@@ -8,18 +8,8 @@ services:
     extends:
       file: ../docker-compose.yml
       service: db
-  notifications_db:
-    image: "postgres:9.5"
-    expose:
-      - "5432"
     environment:
-      - POSTGRES_PASSWORD=mysecretpassword
-      - POSTGRES_USER=coder
-      - POSTGRES_DB=tc_notifications
-  db_test:
-    extends:
-      file: ../docker-compose.yml
-      service: db_test
+      - POSTGRES_MULTIPLE_DATABASES=projectsdb,projectsdb_test,tc_notifications
   esearch:
     extends:
       file: ../docker-compose.yml
@@ -101,8 +91,7 @@ services:
     ports:
       - "4002:4002"
     depends_on:
-      - notifications_db
-      - esearch
+      - db
     environment:
       - PORT=4002
   tc-notifications-processor:

local/postgres-db/Dockerfile

@@ -0,0 +1,2 @@
+FROM postgres:9.5
+COPY create-multiple-postgresql-databases.sh /docker-entrypoint-initdb.d/

local/postgres-db/create-multiple-postgresql-databases.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -e
+set -u
+
+function create_user_and_database() {
+	local database=$1
+	echo "  Creating database '$database'"
+	psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" <<-EOSQL
+	    CREATE DATABASE $database;
+	    GRANT ALL PRIVILEGES ON DATABASE $database TO $POSTGRES_USER;
+EOSQL
+}
+
+if [ -n "$POSTGRES_MULTIPLE_DATABASES" ]; then
+	echo "Multiple database creation requested: $POSTGRES_MULTIPLE_DATABASES"
+	for db in $(echo $POSTGRES_MULTIPLE_DATABASES | tr ',' ' '); do
+		create_user_and_database $db
+	done
+	echo "Multiple databases created"
+fi