Golang如何使用Docker Compose管理多服务_Golang Docker Compose多服务管理实践详解

version: '3.8'
<p>services:
app:
build:
context: .
dockerfile: Dockerfile
ports:</p><ul><li>"8080:8080"
environment:</li><li>DB_HOST=postgres</li><li>DB_PORT=5432</li><li>REDIS_ADDR=redis:6379
depends_on:</li><li>postgres</li><li>redis
networks:</li><li>app-network</li></ul><p>postgres:
image: postgres:15-alpine
environment:
POSTGRES_DB: myapp
POSTGRES_USER: user
POSTGRES_PASSWORD: password
volumes:</p><ul><li>pgdata:/var/lib/postgresql/data
ports:</li><li>"5432:5432"
networks:</li><li>app-network</li></ul><p>redis:
image: redis:alpine
ports:</p><ul><li>"6379:6379"
networks:</li><li>app-network</li></ul><p>nginx:
image: nginx:alpine
ports:</p><ul><li>"80:80"
volumes:</li><li>./nginx.conf:/etc/nginx/nginx.conf:ro
depends_on:</li><li>app
networks:</li><li>app-network</li></ul><p>volumes:
pgdata:</p><p>networks:
app-network:
driver: bridge

# 构建阶段
FROM golang:1.22-alpine AS builder
WORKDIR /app
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN go build -o main ./cmd/app/main.go
<h1>运行阶段</h1><p>FROM alpine:latest
RUN apk --no-cache add ca-certificates
WORKDIR /root/
COPY --from=builder /app/main .
EXPOSE 8080
CMD ["./main"]

dbHost := os.Getenv("DB_HOST")
dbPort := os.Getenv("DB_PORT")
dsn := fmt.Sprintf("user=user password=password dbname=myapp host=%s port=%s sslmode=disable", dbHost, dbPort)
db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})

app:
  build: .
  image: go-app
  command: sh -c './wait-for postgres:5432 -- ./main'
  environment:
    - DB_HOST=postgres
  depends_on:
    - postgres
    - redis

DB_USER=user
DB_PASSWORD=password
REDIS_PASSWORD=

environment:
  - POSTGRES_USER=${DB_USER}
  - POSTGRES_PASSWORD=${DB_PASSWORD}