first commit

Dockerfile

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+FROM python:3.10
+WORKDIR /app
+COPY requirements.txt /app/requirements.txt
+RUN pip install --no-cache-dir -r /app/requirements.txt
+COPY . /app
+
+CMD ["python", "app.py"]

app.py

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+import psycopg2
+
+print('Can`t establish connection to database')
+
+'''
+conn = psycopg2.connect(
+    dbname="kolchin",
+    user="kolchin",
+    password="postgres",
+    host="pg",
+    port="5432"
+)
+
+cursor = conn.cursor()
+
+with conn.cursor() as curs:
+    curs.execute(CREATE TABLE IF NOT EXISTS tablee(
+    name varchar(10) NOT NULL,                                 
+    surname varchar,
+    city varchar,
+    age smallint
+    );)
+conn.commit()
+conn.close()
+'''

db/init.sql

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+--create database test_db;
+--create user test_user with encrypted password '123';
+--grant all privileges on database test_db to test_user;
+CREATE TABLE IF NOT EXISTS test_table(
+    --id INT PRIMARY KEY, 
+    name varchar(10) NOT NULL,                                 
+    surname varchar,
+    city varchar,
+    age smallint
+    );
+
+insert into test_table (name, surname, city, age) 
+values ('Aleksandr', 'Kolchin', 'Murmansk', 27), ('Dima', 'Ivanov', 'Moscow', 20), ('Petr', 'Sevanov', 'Omsk', 30), ('Oleg', 'Solop', 'Moscow', 25),
+('Aleksandr', 'Bistrov', 'Kaliningrad', 22), ('Ivan', 'Kochev', 'Apatity', 33), ('Sergey', 'Sergeev', 'Piter', 25), ('Nikita', 'Korol', 'Voronezh', 25),
+('Semen', 'Semenov', 'Yaroslavl', 26), ('Yaroslav', 'Vaneev', 'Kirov', 39), ('Oleg', 'Simonov', 'Moscow', 20), ('Nikita', 'Levin', 'Murmansk', 29),
+('Sergey', 'Moiseev', 'Apatity', 19), ('Roman', 'Padorin', 'Orel', 32), ('Petr', 'Krychkov', 'Kandalaksha', 26), ('Stas', 'Kotin', 'Norilsk', 21),
+('Boris', 'Kolyshkin', 'Polyarniy', 20), ('Konstantin', 'Lenin', 'Moscow', 25), ('Boris', 'Safonov', 'Severomorsk', 17), ('Ivan', 'Kolyshkin', 'Murmansk', 42);
+

docker-compose.yaml

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+name: pg_and_pgadmin
+services:
+  pg:
+    image: postgres:17.0-bookworm
+    container_name: postgres_new
+    environment:
+      POSTGRES_USER: kolchin
+      POSTGRES_PASSWORD: postgres
+      PGDATA: /var/lib/postgresql/data/pgdata
+    volumes:
+      - pg-data:/var/lib/postgresql/data
+      - ./db/:/docker-entrypoint-initdb.d
+    restart: unless-stopped
+    networks:
+      - pg-net
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      interval: 5s
+      timeout: 10s
+      retries: 3
+  pgadmin:
+    image: dpage/pgadmin4:8.12.0
+    container_name: pgadmin_new
+    environment:
+      PGADMIN_DEFAULT_EMAIL: user@example.com
+      PGADMIN_DEFAULT_PASSWORD: postgres
+    ports:
+      - 10501:80
+    restart: unless-stopped
+    networks:
+      - pg-net
+    depends_on:
+      pg:
+        condition: service_healthy
+#  app:
+#    build:
+#      context: ./
+#      args:
+#        PYTHON_VERSION: "3.10"
+#        UID: 10002
+#    container_name: python-app
+#    networks:
+#      - pg-net
+#    depends_on:
+#      pg:
+#        condition: service_healthy
+
+volumes:
+  pg-data:
+networks:
+  pg-net:

requirements.txt

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+psycopg2 == 2.8