371 lines
10 KiB
Go
371 lines
10 KiB
Go
package k8s
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import (
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"context"
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"fmt"
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"time"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/rest"
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"k8s.io/client-go/tools/clientcmd"
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metricsv "k8s.io/metrics/pkg/client/clientset/versioned"
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"github.com/ocdp/cluster-service/internal/domain/entity"
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"github.com/ocdp/cluster-service/internal/domain/repository"
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)
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// MetricsClient 实现从 Kubernetes 集群获取监控指标
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type MetricsClient struct {
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clusterRepo repository.ClusterRepository
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}
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// NewMetricsClient 创建 MetricsClient
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func NewMetricsClient(clusterRepo repository.ClusterRepository) *MetricsClient {
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return &MetricsClient{
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clusterRepo: clusterRepo,
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}
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}
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// GetClusterMetrics 获取集群监控指标
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func (c *MetricsClient) GetClusterMetrics(ctx context.Context, clusterID string) (*entity.ClusterMetrics, error) {
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// 获取集群信息
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cluster, err := c.clusterRepo.GetByID(ctx, clusterID)
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if err != nil {
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return nil, fmt.Errorf("failed to get cluster: %w", err)
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}
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// 创建 Kubernetes 客户端
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clientset, metricsClient, err := c.createK8sClients(cluster)
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if err != nil {
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return nil, fmt.Errorf("failed to create k8s client: %w", err)
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}
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// 获取节点列表
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nodes, err := clientset.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
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if err != nil {
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return nil, fmt.Errorf("failed to list nodes: %w", err)
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}
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// 获取所有 Pods
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pods, err := clientset.CoreV1().Pods("").List(ctx, metav1.ListOptions{})
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if err != nil {
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return nil, fmt.Errorf("failed to list pods: %w", err)
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}
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// 获取节点指标（CPU/内存使用情况）
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nodeMetrics, err := c.getNodeMetricsData(ctx, clientset, metricsClient, nodes.Items)
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if err != nil {
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// 如果无法获取 metrics，记录错误但继续
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fmt.Printf("Warning: failed to get node metrics: %v\n", err)
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}
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// 计算集群级别汇总
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metrics := c.aggregateClusterMetrics(cluster, nodes.Items, pods.Items, nodeMetrics)
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return metrics, nil
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}
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// GetNodeMetrics 获取集群节点指标
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func (c *MetricsClient) GetNodeMetrics(ctx context.Context, clusterID string) ([]*entity.NodeMetrics, error) {
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cluster, err := c.clusterRepo.GetByID(ctx, clusterID)
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if err != nil {
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return nil, fmt.Errorf("failed to get cluster: %w", err)
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}
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clientset, metricsClient, err := c.createK8sClients(cluster)
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if err != nil {
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return nil, fmt.Errorf("failed to create k8s client: %w", err)
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}
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nodes, err := clientset.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
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if err != nil {
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return nil, fmt.Errorf("failed to list nodes: %w", err)
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}
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return c.getNodeMetricsData(ctx, clientset, metricsClient, nodes.Items)
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}
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// createK8sClients 创建 Kubernetes 客户端
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func (c *MetricsClient) createK8sClients(cluster *entity.Cluster) (*kubernetes.Clientset, *metricsv.Clientset, error) {
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config, err := clientcmd.RESTConfigFromKubeConfig([]byte(cluster.GetKubeConfig()))
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if err != nil {
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// 如果无法从 kubeconfig 创建，尝试使用集群配置
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config = &rest.Config{
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Host: cluster.Host,
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TLSClientConfig: rest.TLSClientConfig{
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CAData: []byte(cluster.CAData),
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CertData: []byte(cluster.CertData),
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KeyData: []byte(cluster.KeyData),
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},
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}
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}
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clientset, err := kubernetes.NewForConfig(config)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to create clientset: %w", err)
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}
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metricsClient, err := metricsv.NewForConfig(config)
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if err != nil {
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// Metrics API 可能不可用，返回 nil 但不报错
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return clientset, nil, nil
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}
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return clientset, metricsClient, nil
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}
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// getNodeMetricsData 获取节点详细指标
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func (c *MetricsClient) getNodeMetricsData(
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ctx context.Context,
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clientset *kubernetes.Clientset,
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metricsClient *metricsv.Clientset,
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nodes []corev1.Node,
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) ([]*entity.NodeMetrics, error) {
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result := make([]*entity.NodeMetrics, 0, len(nodes))
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for _, node := range nodes {
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nodeMetric := &entity.NodeMetrics{
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NodeName: node.Name,
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Status: getNodeStatus(&node),
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Role: getNodeRole(&node),
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Age: getNodeAge(&node),
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OSImage: node.Status.NodeInfo.OSImage,
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KernelVersion: node.Status.NodeInfo.KernelVersion,
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ContainerRuntime: node.Status.NodeInfo.ContainerRuntimeVersion,
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KubeletVersion: node.Status.NodeInfo.KubeletVersion,
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}
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// CPU
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cpuCapacity := node.Status.Capacity.Cpu()
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cpuAllocatable := node.Status.Allocatable.Cpu()
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nodeMetric.CPUCapacity = fmt.Sprintf("%.2f cores", float64(cpuCapacity.MilliValue())/1000.0)
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nodeMetric.CPUAllocatable = fmt.Sprintf("%.2f cores", float64(cpuAllocatable.MilliValue())/1000.0)
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// Memory
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memCapacity := node.Status.Capacity.Memory()
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memAllocatable := node.Status.Allocatable.Memory()
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nodeMetric.MemoryCapacity = formatBytes(memCapacity.Value())
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nodeMetric.MemoryAllocatable = formatBytes(memAllocatable.Value())
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// GPU (从 node allocatable 中查找)
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if gpu, ok := node.Status.Allocatable["nvidia.com/gpu"]; ok {
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nodeMetric.GPUCapacity = int(gpu.Value())
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// 尝试获取 GPU 类型
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if gpuType, ok := node.Labels["nvidia.com/gpu.product"]; ok {
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nodeMetric.GPUType = gpuType
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}
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}
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// 获取 Pod 数量
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pods, err := clientset.CoreV1().Pods("").List(ctx, metav1.ListOptions{
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FieldSelector: fmt.Sprintf("spec.nodeName=%s", node.Name),
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})
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if err == nil {
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nodeMetric.PodCount = len(pods.Items)
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}
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// 如果有 metrics client，获取实时使用情况
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if metricsClient != nil {
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nodeMetricData, err := metricsClient.MetricsV1beta1().NodeMetricses().Get(ctx, node.Name, metav1.GetOptions{})
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if err == nil {
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// CPU 使用
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cpuUsage := nodeMetricData.Usage.Cpu()
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nodeMetric.CPUUsage = fmt.Sprintf("%.2f cores", float64(cpuUsage.MilliValue())/1000.0)
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if cpuAllocatable.MilliValue() > 0 {
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nodeMetric.CPUPercent = float64(cpuUsage.MilliValue()) / float64(cpuAllocatable.MilliValue()) * 100
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}
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// Memory 使用
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memUsage := nodeMetricData.Usage.Memory()
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nodeMetric.MemoryUsage = formatBytes(memUsage.Value())
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if memAllocatable.Value() > 0 {
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nodeMetric.MemoryPercent = float64(memUsage.Value()) / float64(memAllocatable.Value()) * 100
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}
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}
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}
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result = append(result, nodeMetric)
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}
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return result, nil
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}
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// aggregateClusterMetrics 聚合集群级别指标
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func (c *MetricsClient) aggregateClusterMetrics(
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cluster *entity.Cluster,
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nodes []corev1.Node,
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pods []corev1.Pod,
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nodeMetrics []*entity.NodeMetrics,
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) *entity.ClusterMetrics {
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metrics := &entity.ClusterMetrics{
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ClusterID: cluster.ID,
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ClusterName: cluster.Name,
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Status: "healthy",
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NodeCount: len(nodes),
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PodCount: len(pods),
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LastCheck: time.Now(),
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Nodes: make([]entity.NodeMetrics, 0),
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}
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// 汇总资源
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var totalCPU, totalMem, usedCPU, usedMem int64
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var totalGPU, usedGPU int
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healthyNodes := 0
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// 单机最大值
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var maxNodeCPU, maxNodeMem int64
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var maxNodeGPU int
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var maxNodeCPUUsage, maxNodeMemUsage, maxNodeGPUUsage float64
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for i, node := range nodes {
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// CPU
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cpuCap := node.Status.Capacity.Cpu()
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totalCPU += cpuCap.MilliValue()
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if cpuCap.MilliValue() > maxNodeCPU {
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maxNodeCPU = cpuCap.MilliValue()
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}
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// Memory
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memCap := node.Status.Capacity.Memory()
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totalMem += memCap.Value()
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if memCap.Value() > maxNodeMem {
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maxNodeMem = memCap.Value()
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}
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// GPU
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if gpu, ok := node.Status.Allocatable["nvidia.com/gpu"]; ok {
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gpuCount := int(gpu.Value())
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totalGPU += gpuCount
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if gpuCount > maxNodeGPU {
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maxNodeGPU = gpuCount
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}
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}
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// Node status
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if getNodeStatus(&node) == "Ready" {
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healthyNodes++
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}
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// 从 nodeMetrics 获取使用情况
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if i < len(nodeMetrics) && nodeMetrics[i] != nil {
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metrics.Nodes = append(metrics.Nodes, *nodeMetrics[i])
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// 更新单机最大使用率
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if nodeMetrics[i].CPUPercent > maxNodeCPUUsage {
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maxNodeCPUUsage = nodeMetrics[i].CPUPercent
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}
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if nodeMetrics[i].MemoryPercent > maxNodeMemUsage {
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maxNodeMemUsage = nodeMetrics[i].MemoryPercent
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}
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if nodeMetrics[i].GPUPercent > maxNodeGPUUsage {
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maxNodeGPUUsage = nodeMetrics[i].GPUPercent
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}
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}
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}
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// 计算集群 uptime（简化：使用最老节点的年龄）
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if len(nodes) > 0 {
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metrics.Uptime = getNodeAge(&nodes[0])
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}
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// 格式化总资源
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metrics.TotalCPU = fmt.Sprintf("%.2f cores", float64(totalCPU)/1000.0)
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metrics.TotalMemory = formatBytes(totalMem)
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metrics.TotalGPU = totalGPU
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// 格式化单机最大值
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metrics.MaxNodeCPU = fmt.Sprintf("%.2f cores", float64(maxNodeCPU)/1000.0)
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metrics.MaxNodeMemory = formatBytes(maxNodeMem)
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metrics.MaxNodeGPU = maxNodeGPU
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metrics.MaxNodeCPUUsage = maxNodeCPUUsage
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metrics.MaxNodeMemUsage = maxNodeMemUsage
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metrics.MaxNodeGPUUsage = maxNodeGPUUsage
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// 使用情况（简化处理）
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if len(nodeMetrics) > 0 {
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for _, nm := range nodeMetrics {
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// 解析使用的 CPU 和内存
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// 这里简化处理，实际应该解析字符串
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usedCPU += int64(nm.CPUPercent * float64(totalCPU) / 100.0)
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usedMem += int64(nm.MemoryPercent * float64(totalMem) / 100.0)
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usedGPU += nm.GPUUsage
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}
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if totalCPU > 0 {
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metrics.CPUUsage = float64(usedCPU) / float64(totalCPU) * 100
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}
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if totalMem > 0 {
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metrics.MemoryUsage = float64(usedMem) / float64(totalMem) * 100
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}
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if totalGPU > 0 {
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metrics.GPUUsage = float64(usedGPU) / float64(totalGPU) * 100
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}
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metrics.UsedCPU = fmt.Sprintf("%.2f cores", float64(usedCPU)/1000.0)
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metrics.UsedMemory = formatBytes(usedMem)
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metrics.UsedGPU = usedGPU
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}
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// 确定集群状态
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if healthyNodes == len(nodes) {
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metrics.Status = "healthy"
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} else if healthyNodes > 0 {
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metrics.Status = "warning"
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} else {
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metrics.Status = "error"
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}
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return metrics
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}
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// Helper functions
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func getNodeStatus(node *corev1.Node) string {
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for _, condition := range node.Status.Conditions {
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if condition.Type == corev1.NodeReady {
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if condition.Status == corev1.ConditionTrue {
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return "Ready"
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}
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return "NotReady"
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}
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}
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return "Unknown"
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}
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func getNodeRole(node *corev1.Node) string {
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if _, ok := node.Labels["node-role.kubernetes.io/control-plane"]; ok {
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return "control-plane"
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}
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if _, ok := node.Labels["node-role.kubernetes.io/master"]; ok {
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return "control-plane"
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}
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return "worker"
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}
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func getNodeAge(node *corev1.Node) string {
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age := time.Since(node.CreationTimestamp.Time)
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days := int(age.Hours() / 24)
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hours := int(age.Hours()) % 24
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if days > 0 {
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return fmt.Sprintf("%dd %dh", days, hours)
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}
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return fmt.Sprintf("%dh", hours)
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}
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func formatBytes(bytes int64) string {
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const unit = 1024
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if bytes < unit {
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return fmt.Sprintf("%d B", bytes)
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}
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div, exp := int64(unit), 0
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for n := bytes / unit; n >= unit; n /= unit {
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div *= unit
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exp++
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}
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return fmt.Sprintf("%.1f %ciB", float64(bytes)/float64(div), "KMGTPE"[exp])
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}
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