// Returns the name of the VM on which this code is running.
// This is done by searching for the name of virtual machine by current IP.
// Prerequisite: this code assumes VMWare vmtools or open-vm-tools to be installed in the VM.
func readInstanceID(cfg *VSphereConfig) (string, error) {
addrs, err := net.InterfaceAddrs()
if err != nil {
return "", err
}
if len(addrs) == 0 {
return "", fmt.Errorf("unable to retrieve Instance ID")
}
// Create context
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// Create vSphere client
c, err := vsphereLogin(cfg, ctx)
if err != nil {
return "", err
}
defer c.Logout(ctx)
// Create a new finder
f := find.NewFinder(c.Client, true)
// Fetch and set data center
dc, err := f.Datacenter(ctx, cfg.Global.Datacenter)
if err != nil {
return "", err
}
f.SetDatacenter(dc)
s := object.NewSearchIndex(c.Client)
var svm object.Reference
for _, v := range addrs {
ip, _, err := net.ParseCIDR(v.String())
if err != nil {
return "", fmt.Errorf("unable to parse cidr from ip")
}
// Finds a virtual machine or host by IP address.
svm, err = s.FindByIp(ctx, dc, ip.String(), true)
if err == nil && svm != nil {
break
}
}
if svm == nil {
return "", fmt.Errorf("unable to retrieve vm reference from vSphere")
}
var vm mo.VirtualMachine
err = s.Properties(ctx, svm.Reference(), []string{"name"}, &vm)
if err != nil {
return "", err
}
return vm.Name, nil
}
func (flag *SearchFlag) search() (object.Reference, error) {
ctx := context.TODO()
var ref object.Reference
var err error
c, err := flag.Client()
if err != nil {
return nil, err
}
dc, err := flag.Datacenter()
if err != nil {
return nil, err
}
switch {
case flag.byDatastorePath != "":
ref, err = flag.searchByDatastorePath(c, dc)
case flag.byDNSName != "":
ref, err = flag.searchByDNSName(c, dc)
case flag.byInventoryPath != "":
ref, err = flag.searchByInventoryPath(c, dc)
case flag.byIP != "":
ref, err = flag.searchByIP(c, dc)
case flag.byUUID != "":
ref, err = flag.searchByUUID(c, dc)
default:
err = errors.New("no search flag specified")
}
if err != nil {
return nil, err
}
if ref == nil {
return nil, fmt.Errorf("no such %s", flag.entity)
}
// set the InventoryPath field
finder, err := flag.Finder()
if err != nil {
return nil, err
}
ref, err = finder.ObjectReference(ctx, ref.Reference())
if err != nil {
return nil, err
}
return ref, nil
}
// Returns the name of the VM and its Cluster on which this code is running.
// This is done by searching for the name of virtual machine by current IP.
// Prerequisite: this code assumes VMWare vmtools or open-vm-tools to be installed in the VM.
func readInstance(cfg *VSphereConfig) (string, string, error) {
addrs, err := net.InterfaceAddrs()
if err != nil {
return "", "", err
}
if len(addrs) == 0 {
return "", "", fmt.Errorf("unable to retrieve Instance ID")
}
// Create context
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// Create vSphere client
c, err := vsphereLogin(cfg, ctx)
if err != nil {
return "", "", err
}
defer c.Logout(ctx)
// Create a new finder
f := find.NewFinder(c.Client, true)
// Fetch and set data center
dc, err := f.Datacenter(ctx, cfg.Global.Datacenter)
if err != nil {
return "", "", err
}
f.SetDatacenter(dc)
s := object.NewSearchIndex(c.Client)
var svm object.Reference
for _, v := range addrs {
ip, _, err := net.ParseCIDR(v.String())
if err != nil {
return "", "", fmt.Errorf("unable to parse cidr from ip")
}
// Finds a virtual machine or host by IP address.
svm, err = s.FindByIp(ctx, dc, ip.String(), true)
if err == nil && svm != nil {
break
}
}
if svm == nil {
return "", "", fmt.Errorf("unable to retrieve vm reference from vSphere")
}
var vm mo.VirtualMachine
err = s.Properties(ctx, svm.Reference(), []string{"name", "resourcePool"}, &vm)
if err != nil {
return "", "", err
}
var cluster string
if vm.ResourcePool != nil {
// Extract the Cluster Name if VM belongs to a ResourcePool
var rp mo.ResourcePool
err = s.Properties(ctx, *vm.ResourcePool, []string{"parent"}, &rp)
if err == nil {
var ccr mo.ClusterComputeResource
err = s.Properties(ctx, *rp.Parent, []string{"name"}, &ccr)
if err == nil {
cluster = ccr.Name
} else {
glog.Warningf("VM %s, does not belong to a vSphere Cluster, will not have FailureDomain label", vm.Name)
}
} else {
glog.Warningf("VM %s, does not belong to a vSphere Cluster, will not have FailureDomain label", vm.Name)
}
}
return vm.Name, cluster, nil
}