Golang如何使用Docker构建Web应用_Golang Docker Web应用构建实践

package main
<p>import (
"fmt"
"log"
"net/http"
"os"
)</p><p>func helloHandler(w http.ResponseWriter, r *http.Request) {
name := os.Getenv("APP_NAME")
if name == "" {
name = "My Go Web App"
}
fmt.Fprintf(w, "Hello from %s!", name)
}</p><p>func main() {
http.HandleFunc("/", helloHandler)
port := os.Getenv("PORT")
if port == "" {
port = "8080"
}
log.Printf("Starting server on :%s", port)
log.Fatal(http.ListenAndServe(":"+port, nil))
}

# 使用官方Golang镜像作为构建环境
FROM golang:1.21-alpine AS builder
<h1>设置工作目录</h1><p>WORKDIR /app</p><h1>复制go.mod和go.sum以利用缓存</h1><p>COPY go.mod go.sum ./
RUN go mod download</p><h1>复制源码并构建二进制文件</h1><p>COPY . .
RUN go build -o server .</p><h1>第二阶段：使用轻量Alpine镜像运行</h1><p>FROM alpine:latest
RUN apk --no-cache add ca-certificates
WORKDIR /root/</p><h1>从构建阶段复制二进制文件</h1><p>COPY --from=builder /app/server .</p>
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                <h1>声明端口</h1><p>EXPOSE 8080</p><h1>启动命令</h1><p>CMD ["./server"]

docker run -d -p 8080:8080 -e APP_NAME="Prod App" -e PORT=8080 my-go-webapp

node_modules
.git
README.md
*.log
tmp/