SpringBoot服务获取Pod当前IP的两种方案

apiVersion: apps/v1
kind: Deployment
metadata:
  name: springboot-app
spec:
  replicas: 1
  selector:
    matchLabels:
      app: springboot-app
  template:
    metadata:
      labels:
        app: springboot-app
    spec:
      containers:
      - name: springboot-app
        image: your-springboot-image
        env:
        - name: POD_IP
          valueFrom:
            fieldRef:
              fieldPath: status.podIP

@Component
public class PodInfo {
    private final String podIp;

    public PodInfo(@Value("${POD_IP}") String podIp) {
        this.podIp = podIp;
    }    public String getPodIp() {
        return podIp;


    }
}

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

​​​​​​​public class PodIpUtils {
    public static String getPodIp() {
        try {
            // 获取所有网络接口
            List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces());
            for (NetworkInterface ni : interfaces) {
                if (ni.isLoopback() || !ni.isUp()) {
                    continue; // 跳过回环接口和不可用接口
                }
                // 获取接口下的 IP 地址
                List<InetAddress> addresses = Collections.list(ni.getInetAddresses());
                for (InetAddress addr : addresses) {
                    if (addr instanceof java.net.Inet4Address) {
                        return addr.getHostAddress(); // 优先返回 IPv4 地址
                    }
                }
            }
        } catch (Exception e) {
            // 日志记录异常（可集成日志框架）
            System.err.println("Failed to get Pod IP: " + e.getMessage());
        }
        return null; // 未找到则返回 null
    }
}

@RestController
public class PodIpController {
    @GetMapping("/pod-ip")
    public String getPodIp() {
        return PodIpUtils.getPodIp();
    }
}

package com.example.utils;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Collections;

​​​​​​​public class PodIpUtils {
    public static String getPodIp() {
        try {
            for (NetworkInterface ni : Collections.list(NetworkInterface.getNetworkInterfaces())) {
                if (ni.isLoopback() || !ni.isUp()) continue;
                for (InetAddress addr : Collections.list(ni.getInetAddresses())) {
                    if (addr instanceof java.net.Inet4Address) {
                        return addr.getHostAddress();
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

package com.example.controller;

import com.example.utils.PodIpUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class PodIpController {
    @GetMapping("/pod-ip")
    public String getPodIp() {
        return PodIpUtils.getPodIp();
    }
}