Golang Docker容器健康检查与自愈机制示例

package main
<p>import (
"net/http"
"time"
)</p><p>func main() {
mux := http.NewServeMux()</p><pre class="brush:php;toolbar:false;"><pre class="brush:php;toolbar:false;">// 健康检查接口
mux.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
    // 可在此处添加数据库、缓存等依赖检查
    w.WriteHeader(http.StatusOK)
    w.Write([]byte("OK"))
})

// 主业务接口（示例）
mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
    time.Sleep(3 * time.Second) // 模拟慢请求
    w.Write([]byte("Hello from Go!"))
})

http.ListenAndServe(":8080", mux)

FROM golang:1.21-alpine AS builder
WORKDIR /app
COPY . .
RUN go build -o server .
<p>FROM alpine:latest
RUN apk --no-cache add ca-certificates
WORKDIR /root/
COPY --from=builder /app/server .
EXPOSE 8080</p><h1>定义健康检查：每5秒检查一次，超时3秒，允许3次失败</h1><p>HEALTHCHECK --interval=5s --timeout=3s --start-period=10s --retries=3 \
CMD wget -qO- <a href="https://www.php.cn/link/1633b2e8d8d39ecaf5fd05fd16b4ffd0">https://www.php.cn/link/1633b2e8d8d39ecaf5fd05fd16b4ffd0</a> || exit 1</p><p>CMD ["./server"]

# 构建镜像
docker build -t go-health-example .
<h1>启动容器</h1><p>docker run -d -p 8080:8080 --name go-server go-health-example</p>
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                <h1>查看容器健康状态</h1><p>docker inspect go-server | grep -i health

livenessProbe:
  httpGet:
    path: /health
    port: 8080
  initialDelaySeconds: 10
  periodSeconds: 5
  failureThreshold: 3