view

Create a view of all VMs in a specific subfolder, powering off all VMs within

package main

import (
	"context"
	"fmt"
	"log"

	"github.com/vmware/govmomi/object"
	"github.com/vmware/govmomi/property"
	"github.com/vmware/govmomi/simulator"
	"github.com/vmware/govmomi/view"
	"github.com/vmware/govmomi/vim25"
)

func main() {
	model := simulator.VPX()
	model.Folder = 1 // put everything inside subfolders

	simulator.Run(func(ctx context.Context, c *vim25.Client) error {
		folder, err := object.NewSearchIndex(c).FindByInventoryPath(ctx, "/F0/DC0/vm/F0")
		if err != nil {
			return err
		}

		m := view.NewManager(c)
		kind := []string{"VirtualMachine"} // include VMs only, ignoring other object types

		// Root of the view is the subfolder moid (true == recurse into any subfolders of the root)
		v, err := m.CreateContainerView(ctx, folder.Reference(), kind, true)
		if err != nil {
			log.Fatal(err)
		}

		vms, err := v.Find(ctx, kind, property.Filter{})
		if err != nil {
			return err
		}

		for _, id := range vms {
			vm := object.NewVirtualMachine(c, id)
			task, err := vm.PowerOff(ctx)
			if err != nil {
				return err
			}

			if err = task.Wait(ctx); err != nil {
				return err
			}
		}

		fmt.Println(len(vms))

		return v.Destroy(ctx)
	}, model)
}

Output:

4

Create a view of all hosts in the inventory, printing host names that belong to a cluster and excluding standalone hosts.

package main

import (
	"context"
	"fmt"
	"log"
	"sort"

	"github.com/vmware/govmomi/simulator"
	"github.com/vmware/govmomi/view"
	"github.com/vmware/govmomi/vim25"
	"github.com/vmware/govmomi/vim25/mo"
)

func main() {
	model := simulator.VPX()
	model.Datacenter = 2

	simulator.Run(func(ctx context.Context, c *vim25.Client) error {
		m := view.NewManager(c)
		kind := []string{"HostSystem"}

		v, err := m.CreateContainerView(ctx, c.ServiceContent.RootFolder, kind, true)
		if err != nil {
			log.Fatal(err)
		}

		var hosts []mo.HostSystem
		var names []string

		err = v.Retrieve(ctx, kind, []string{"summary.config.name", "parent"}, &hosts)
		if err != nil {
			return err
		}

		for _, host := range hosts {
			if host.Parent.Type != "ClusterComputeResource" {
				continue
			}
			names = append(names, host.Summary.Config.Name)
		}

		sort.Strings(names)
		fmt.Println(names)

		return v.Destroy(ctx)
	}, model)
}

Output:

[DC0_C0_H0 DC0_C0_H1 DC0_C0_H2 DC1_C0_H0 DC1_C0_H1 DC1_C0_H2]

Create a view of all VMs in the inventory, printing VM names that end with "_VM1".

package main

import (
	"context"
	"fmt"
	"log"
	"sort"

	"github.com/vmware/govmomi/property"
	"github.com/vmware/govmomi/simulator"
	"github.com/vmware/govmomi/view"
	"github.com/vmware/govmomi/vim25"
	"github.com/vmware/govmomi/vim25/mo"
)

func main() {
	simulator.Run(func(ctx context.Context, c *vim25.Client) error {
		m := view.NewManager(c)
		kind := []string{"VirtualMachine"}

		v, err := m.CreateContainerView(ctx, c.ServiceContent.RootFolder, kind, true)
		if err != nil {
			log.Fatal(err)
		}

		var vms []mo.VirtualMachine
		var names []string

		err = v.RetrieveWithFilter(ctx, kind, []string{"name"}, &vms, property.Filter{"name": "*_VM1"})
		if err != nil {
			return err
		}

		for _, vm := range vms {
			names = append(names, vm.Name)
		}

		sort.Strings(names)
		fmt.Println(names)

		return v.Destroy(ctx)
	})
}

Output:

[DC0_C0_RP0_VM1 DC0_H0_VM1]