Golang：`dial tcp 172.20.0.7:8081: connect: connection refused`，在 docker 容器/服務之間隨機出錯

Question

我有一個docker-compose文件，內容如下

# Docker Compose file Reference (https://docs.docker.com/compose/compose-file/)

version: '3'

services:

  john:
    build:
      context: .
      dockerfile: Dockerfiles/cowboys/John/Dockerfile
      args:
        - COWBOY_NAME_JOHN
        - CONTAINER_PORT_JOHN
    ports:
      - "8081:8081" # Forward the exposed port on the container to port on the host machine
    restart: unless-stopped
    networks:
      - fullstack
    depends_on:
      db:
        condition: service_healthy
    links:
      - db


  philip:
    build:
      context: .
      dockerfile: Dockerfiles/cowboys/Philip/Dockerfile
      args:
        - COWBOY_NAME_PHILIP
        - CONTAINER_PORT_PHILIP
    ports:
      - "8085:8085"
    restart: unless-stopped
    networks:
      - fullstack
    depends_on:
      db:
        condition: service_healthy
    links:
      - db

  db:
    build:
      context: Dockerfiles/mysql
    environment:
      MYSQL_ROOT_PASSWORD: root
      MYSQL_USER: ${MYSQL_USER}
      MYSQL_PASSWORD: ${MYSQL_PASSWORD}
      MYSQL_DATABASE: ${MYSQL_DATABASE}
    restart: on-failure
    networks:
      - fullstack
    ports:
      - "3306:3306"
    healthcheck:
      test: mysqladmin ping -h 127.0.0.1 -u $$MYSQL_USER --password=$$MYSQL_PASSWORD

networks:
  fullstack:
    driver: bridge

當我運行docker-compose up --build （或docker-compose up --build --force-recreate以在下次運行時重新初始化數據庫），我收到這樣的錯誤

sam_1 | panic: Put "http://john:8081/shoot": dial tcp 172.20.0.7:8081: connect: connection refused

john是 services 下的services名稱之一。 這是完整的屏幕截圖：

鏈接到可以看到所有詳細信息的存儲庫，包括環境變量和相關的 Dockerfile - https://github.com/sitetester/distributed-cowboys

誰能解釋一下如何擺脫這個錯誤？ 它只是隨機發生/發生。 不知道如何解決它。 提前致謝！

Answer 1

已解決：刪除現有容器/圖像並修剪 docker 卷解決了這個問題。