feat(运维监控模块): 新增获取Node状态接口

1. 创建 [K8sNodeStatus] 实例并设置节点IP。
2. 构造PromQL查询语句，调用 Prometheus 接口获取节点CPU使用率：
   - 使用 [PromQLConstant.NODE_CPU_USAGE(nodeIp)] 生成查询语句。
   - 调用 `remoteGatewayService.getPrometheusQueryRes(...)` 发送请求。
   - 解析响应结果，若成功则提取CPU使用率数值并设置到对象中。
3. 同理，查询节点内存使用率并设置到对象中。
4. 返回封装好的 [K8sNodeStatus]对象。

microservices-modules/microservices-modules-mon/src/main/java/com/microservices/mon/k8s/controller/K8sDashboardController.java

@@ -66,4 +66,10 @@ public class K8sDashboardController extends BaseController {
     public GenericsAjaxResult<K8sPodContainerStatus> podContainerStatus(@PathVariable("containerID") String containerID) {
         return GenericsAjaxResult.success(k8sNamespaceService.getPodContainerStatus(containerID));
     }
+
+    @ApiOperation(value = "获取服务器节点状态")
+    @GetMapping("/cluster/nodeStatus/{nodeIp}")
+    public GenericsAjaxResult<K8sNodeStatus> nodeStatus(@PathVariable("nodeIp") String nodeIp) {
+        return GenericsAjaxResult.success(k8sNamespaceService.getNodeStatus(nodeIp));
+    }
 }

microservices-modules/microservices-modules-mon/src/main/java/com/microservices/mon/k8s/domain/K8sNodeStatus.java

@@ -0,0 +1,19 @@
+package com.microservices.mon.k8s.domain;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+
+
+@Data
+@ApiModel("K8S Node状态")
+public class K8sNodeStatus {
+    @ApiModelProperty(value = "节点IP")
+    private String nodeIp;
+
+    @ApiModelProperty(value = "CPU使用率")
+    private Float cpuUsage;
+
+    @ApiModelProperty(value = "内存使用率")
+    private Float memoryUsage;
+}

microservices-modules/microservices-modules-mon/src/main/java/com/microservices/mon/k8s/domain/K8sPodContainerStatus.java

@@ -16,6 +16,6 @@ public class K8sPodContainerStatus {
     @ApiModelProperty(value = "CPU使用率")
     private Float cpuUsage;
 
-    @ApiModelProperty(value = "内存使用率")
+    @ApiModelProperty(value = "内存使用情况")
     private String memoryUsage;
 }

microservices-modules/microservices-modules-mon/src/main/java/com/microservices/mon/k8s/service/IK8sDashboardService.java

@@ -19,4 +19,6 @@ public interface IK8sDashboardService {
     List<ApplicationRequestCountData> getApplicationRequestCount();
 
     K8sPodContainerStatus getPodContainerStatus(String containerID);
+
+    K8sNodeStatus getNodeStatus(String nodeIp);
 }

microservices-modules/microservices-modules-mon/src/main/java/com/microservices/mon/k8s/service/impl/K8SDashboardServiceImpl.java

@@ -218,6 +218,25 @@ public class K8SDashboardServiceImpl extends CommonService implements IK8sDashbo
         return k8sPodContainerStatus;
     }
 
+    @Override
+    public K8sNodeStatus getNodeStatus(String nodeIp) {
+        K8sNodeStatus k8sNodeStatus = new K8sNodeStatus();
+        k8sNodeStatus.setNodeIp(nodeIp);
+        JSONObject cpuUsageJson = remoteGatewayService.getPrometheusQueryRes(PromQLConstant.NODE_CPU_USAGE(nodeIp), SecurityContextHolder.getUserKey());
+        PrometheusResVo cpuPrometheusResVo = cpuUsageJson.toJavaObject(PrometheusResVo.class);
+        if (cpuPrometheusResVo != null && cpuPrometheusResVo.isSuccess()) {
+            PrometheusResultVo result = cpuPrometheusResVo.getData().getResult().get(0);
+            k8sNodeStatus.setCpuUsage(result.getValue().getFloatValue(1));
+        }
+        JSONObject memoryUsageJson = remoteGatewayService.getPrometheusQueryRes(PromQLConstant.NODE_MEMORY_USAGE(nodeIp), SecurityContextHolder.getUserKey());
+        PrometheusResVo memoryPrometheusResVo = memoryUsageJson.toJavaObject(PrometheusResVo.class);
+        if (memoryPrometheusResVo != null && memoryPrometheusResVo.isSuccess()) {
+            PrometheusResultVo result = memoryPrometheusResVo.getData().getResult().get(0);
+            k8sNodeStatus.setMemoryUsage(result.getValue().getFloatValue(1));
+        }
+        return k8sNodeStatus;
+    }
+
     private List<K8sNamespace> getK8sNamespaceList() {
         List<K8sNamespace> k8sNamespaceList = new ArrayList<>();
         List<RancherNamespaceVo> rancherNamespaceVoList;

microservices-modules/microservices-modules-mon/src/main/java/com/microservices/mon/k8s/utils/PromQLConstant.java

@@ -47,4 +47,10 @@ public class PromQLConstant {
     public static String POD_MEMORY_USAGE(String containerId) {
         return String.format("sum without (dc,from,id) (container_memory_usage_bytes{container_label_io_kubernetes_sandbox_id=\"%s\"} - container_memory_cache{container_label_io_kubernetes_sandbox_id=\"%s\"})", containerId, containerId);
     }
+    public static String NODE_CPU_USAGE(String nodeIp) {
+        return String.format("(sum by(instance) (irate(node_cpu_seconds_total{ip=\"%s\",mode!=\"idle\"}[1m])) / on(instance) group_left sum by (instance)((irate(node_cpu_seconds_total{ip=\"%s\"}[1m])))) * 100", nodeIp, nodeIp);
+    }
+    public static String NODE_MEMORY_USAGE(String nodeIp) {
+        return String.format("100 - ((node_memory_MemAvailable_bytes{ip=\"%s\"} * 100) / node_memory_MemTotal_bytes{ip=\"%s\"})", nodeIp, nodeIp);
+    }
 }