Как пользоваться Docker Compose: установка Docker, compose-файл, up/down, логи, первый Web+БД стек

Установить Compose и управлять стеком Web+Postgres через up, down и logs.

Нужны Web и PostgreSQL на ноутбуке без конфликтов пакетов на хосте. Docker Compose описывает несколько контейнеров в docker-compose.yml и управляет ими одной CLI.

По запросу Docker Compose установка docker-compose.yml up down логи Web база данных нужны Docker+Compose, compose-файл, up/down, logs и рабочий Web+БД. По docs.docker.com.

Кому подходит Compose

Установка Docker и плагина Compose

1. 1

   macOS / Windows: Docker Desktop

   Download from https://docs.docker.com/desktop/ (Docker Hub download links redirect there). Install, start Docker Desktop, wait until the engine reports running. Compose V2 ships as docker compose.

2. 2

   Linux: Docker Engine + compose plugin

   Follow https://docs.docker.com/engine/install/ for your distro, then install the Compose plugin per https://docs.docker.com/compose/install/linux/ (package name often docker-compose-plugin).

3. 3

   Verify CLI

   Run docker --version and docker compose version. If only hyphenated docker-compose exists, prefer upgrading to the plugin; legacy binary behavior differs slightly.

4. 4

   Permissions (Linux)

   Without sudo, add your user to the docker group per official post-install steps, then log out/in. Do not chmod /var/run/docker.sock to world-writable.

Первый docker-compose.yml (Web + PostgreSQL)

Create a project folder with docker-compose.yml (filename also accepted: compose.yaml). Example: nginx on port 8080 and PostgreSQL 16 with a named volume:

services:
  web:
    image: nginx:alpine
    ports:
      - "8080:80"
    volumes:
      - ./html:/usr/share/nginx/html:ro
    depends_on:
      - db
  db:
    image: postgres:16-alpine
    environment:
      POSTGRES_USER: app
      POSTGRES_PASSWORD: devpass
      POSTGRES_DB: appdb
    volumes:
      - db_data:/var/lib/postgresql/data

volumes:
  db_data:

Put a simple html/index.html on the host. Never commit real passwords; use .env for local secrets and add .env to .gitignore (see Docker docs on env files).

Запуск, остановка, логи

Проверка стека Web + БД

1. 1

   HTTP

   Open http://localhost:8080 — nginx should serve your index.html.

2. 2

   Database

   docker compose exec db psql -U app -d appdb -c '\dt' checks Postgres inside the container.

3. 3

   Rebuild after edits

   If you add a build: section later, use docker compose up -d --build.

Compose orchestrates containers on one Docker host; it is not a cloud substitute. Backups, TLS, and scaling live in platform-specific docs.

Когда стек локально работает, для доски или голоса — главная wbroom, создание и вход в комнату.

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