Docker Compose Technology of Docker

Table of contents

1. What is docker compose?

2. Install docker compose

3. Use case: Deploy a simple fastapi service

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( The following tutorial is based on the environment that has installed the docker service ) 

1. What is docker compose?

Compose is a technology that combines and deploys multiple docker containers. It can start and suspend all containers with one click by writing yaml configuration files, instead of using a series of docker run commands to start multiple containers.

2. Install docker compose

yum install docker-compose-plugin

docker compose version

3. Use case: Deploy a simple fastapi service

1. Initialize the FastAPI service

FastAPI (1) Create a project_fastapi project creation_Sky Leap Blog-CSDN Blog

2. Get the requirements.txt file

3. Create a new Dockerfile

# 设置基础镜像
FROM python:3.10.8
# 设置工作目录
WORKDIR /app
# 拷贝依赖文件到容器中
COPY requirements.txt .
# 安装依赖
RUN pip install -U --no-cache-dir pip && pip install --no-cache-dir -r requirements.txt
# 当前目录中所有文件复制到容器中
COPY . .
# 暴露8000端口
EXPOSE 8000
# 执行启动命令，main.py文件下的app对象
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]

4. Create a new docker-compose.yml file

# compose的版本（与python无关）
version: "3.9"
services:
  app:
    # 构建当前的目录下的Dockerfile文件
    build: .
    # 映射端口8000
    ports:
      - "8000:8000"

5. Find a location in the linux server, create a new folder fastapi-docker-compose, and put the files in this folder.

6. Start the service, linux black window cd to the fastapi-docker-compose folder

docker-compose up -d