88 lines
2.6 KiB
Go
88 lines
2.6 KiB
Go
/*
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Copyright (c) 2017 VMware, Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/*
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This example program shows how the `view` and `property` packages can
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be used to navigate a vSphere inventory structure using govmomi.
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*/
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package main
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import (
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"context"
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"fmt"
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"log"
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"os"
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"text/tabwriter"
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"github.com/vmware/govmomi/examples"
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"github.com/vmware/govmomi/units"
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"github.com/vmware/govmomi/view"
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"github.com/vmware/govmomi/vim25/mo"
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)
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func main() {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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// Connect and login to ESX or vCenter
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c, err := examples.NewClient(ctx)
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if err != nil {
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log.Fatal(err)
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}
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defer c.Logout(ctx)
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// Create a view of HostSystem objects
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m := view.NewManager(c.Client)
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v, err := m.CreateContainerView(ctx, c.ServiceContent.RootFolder, []string{"HostSystem"}, true)
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if err != nil {
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log.Fatal(err)
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}
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defer v.Destroy(ctx)
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// Retrieve summary property for all hosts
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// Reference: http://pubs.vmware.com/vsphere-60/topic/com.vmware.wssdk.apiref.doc/vim.HostSystem.html
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var hss []mo.HostSystem
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err = v.Retrieve(ctx, []string{"HostSystem"}, []string{"summary"}, &hss)
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if err != nil {
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log.Fatal(err)
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}
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// Print summary per host (see also: govc/host/info.go)
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tw := tabwriter.NewWriter(os.Stdout, 2, 0, 2, ' ', 0)
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fmt.Fprintf(tw, "Name:\tUsed CPU:\tTotal CPU:\tFree CPU:\tUsed Memory:\tTotal Memory:\tFree Memory\t:\n")
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for _, hs := range hss {
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totalCPU := int64(hs.Summary.Hardware.CpuMhz) * int64(hs.Summary.Hardware.NumCpuCores)
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freeCPU := int64(totalCPU) - int64(hs.Summary.QuickStats.OverallCpuUsage)
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freeMemory := int64(hs.Summary.Hardware.MemorySize) - (int64(hs.Summary.QuickStats.OverallMemoryUsage) * 1024 * 1024)
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fmt.Fprintf(tw, "%s\t", hs.Summary.Config.Name)
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fmt.Fprintf(tw, "%d\t", hs.Summary.QuickStats.OverallCpuUsage)
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fmt.Fprintf(tw, "%d\t", totalCPU)
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fmt.Fprintf(tw, "%d\t", freeCPU)
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fmt.Fprintf(tw, "%s\t", units.ByteSize(hs.Summary.QuickStats.OverallMemoryUsage))
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fmt.Fprintf(tw, "%s\t", units.ByteSize(hs.Summary.Hardware.MemorySize))
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fmt.Fprintf(tw, "%d\t", freeMemory)
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fmt.Fprintf(tw, "\n")
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}
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_ = tw.Flush()
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}
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