通过vsphere golang webservice sdk 获取vmware主机、虚拟机的监控数据【一】

可以使用 vSphere SDK for Go 来获取 VMware 主机和虚拟机的监控数据。下面是一个简单的示例代码，可以获取 CPU 和内存使用率的指标数据：

package main

import (
    "context"
    "fmt"
    "net/url"
    "time"

    "github.com/vmware/govmomi/vim25"
    "github.com/vmware/govmomi/vim25/soap"
    "github.com/vmware/govmomi/vim25/types"
)

func main() {
    // 连接 vSphere
    u, err := soap.ParseURL("https://<vcenter>/sdk")
    if err != nil {
        fmt.Println(err)
        return
    }
    u.User = url.UserPassword("<username>", "<password>")
    ctx, cancel := context.WithCancel(context.Background())
    defer cancel()
    c, err := vim25.NewClient(ctx, u, true)
    if err != nil {
        fmt.Println(err)
        return
    }

    // 获取主机和虚拟机的监控数据
    perfManager := c.PerfManager()
    perfQuerySpec := types.PerfQuerySpec{
        Entity: types.ManagedObjectReference{
            Type:  "HostSystem",
            Value: "<host-moid>",
        },
        MetricId: []types.PerfMetricId{
            {
                CounterId: 6, // CPU usage
                Instance:  "*",
            },
            {
                CounterId: 24, // Memory usage
                Instance:  "*",
            },
        },
        IntervalId: 20, // 20 seconds
        Format:     "normal",
    }
    perfQuerySpecs := []types.PerfQuerySpec{perfQuerySpec}
    perfQuerySpecsResult, err := perfManager.QueryPerf(ctx, perfQuerySpecs)
    if err != nil {
        fmt.Println(err)
        return
    }
    for _, perfQuerySpecResult := range perfQuerySpecsResult {
        entity := perfQuerySpecResult.Entity
        for _, basePerfEntityMetric := range perfQuerySpecResult.Value {
            perfEntityMetric := basePerfEntityMetric.(*types.PerfEntityMetric)
            instance := perfEntityMetric.Instance[0].Value
            cpuUsage := perfEntityMetric.Value[0].Value[0]
            memoryUsage := perfEntityMetric.Value[1].Value[0]
            fmt.Printf("Entity: %s, Instance: %s, CPU usage: %f%%, Memory usage: %f%%\n", entity.Value, instance, cpuUsage, memoryUsage)
        }
    }

    // 关闭连接
    c.Logout(ctx)
}

在上面的代码中，需要替换 `<vcenter>`、`<username>`、`<password>` 和 `<host-moid>` 分别为 vCenter Server 的地址、用户名、密码和主机的 Managed Object ID。你还可以修改 `perfQuerySpec.MetricId` 来获取其他指标数据。