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virtualmachine.go
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virtualmachine.go
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package virtualmachine
import (
"context"
"net/url"
"strings"
"sync"
"github.com/elastic/beats/libbeat/common"
"github.com/elastic/beats/libbeat/common/cfgwarn"
"github.com/elastic/beats/metricbeat/mb"
"github.com/pkg/errors"
"github.com/vmware/govmomi"
"github.com/vmware/govmomi/find"
"github.com/vmware/govmomi/object"
"github.com/vmware/govmomi/property"
"github.com/vmware/govmomi/vim25"
"github.com/vmware/govmomi/vim25/mo"
"github.com/vmware/govmomi/vim25/types"
)
func init() {
if err := mb.Registry.AddMetricSet("vsphere", "virtualmachine", New); err != nil {
panic(err)
}
}
type MetricSet struct {
mb.BaseMetricSet
Client *vim25.Client
GetCustomFields bool
}
func New(base mb.BaseMetricSet) (mb.MetricSet, error) {
cfgwarn.Beta("The vsphere virtualmachine metricset is beta")
config := struct {
Username string `config:"username"`
Password string `config:"password"`
Insecure bool `config:"insecure"`
GetCustomFields bool `config:"get_custom_fields"`
}{
GetCustomFields: false,
}
if err := base.Module().UnpackConfig(&config); err != nil {
return nil, err
}
u, err := url.Parse(base.HostData().URI)
if err != nil {
return nil, err
}
u.User = url.UserPassword(config.Username, config.Password)
c, err := govmomi.NewClient(context.TODO(), u, config.Insecure)
if err != nil {
return nil, err
}
return &MetricSet{
BaseMetricSet: base,
Client: c.Client,
GetCustomFields: config.GetCustomFields,
}, nil
}
func (m *MetricSet) Fetch() ([]common.MapStr, error) {
f := find.NewFinder(m.Client, true)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// Get custom fields (attributes) names if get_custom_fields is true.
customFieldsMap := make(map[int32]string)
if m.GetCustomFields {
var err error
customFieldsMap, err = setCustomFieldsMap(ctx, m.Client)
if err != nil {
return nil, err
}
}
// Get all data centers.
dcs, err := f.DatacenterList(ctx, "*")
if err != nil {
return nil, err
}
events := []common.MapStr{}
var wg sync.WaitGroup
var mutex sync.Mutex
for _, dc := range dcs {
f.SetDatacenter(dc)
vms, err := f.VirtualMachineList(ctx, "*")
if err != nil {
return nil, errors.Wrap(err, "failed to get virtual machine list")
}
pc := property.DefaultCollector(m.Client)
// Convert virtual machines into list of references.
var refs []types.ManagedObjectReference
for _, vm := range vms {
refs = append(refs, vm.Reference())
}
// Retrieve summary property (VirtualMachineSummary).
var vmt []mo.VirtualMachine
err = pc.Retrieve(ctx, refs, []string{"summary"}, &vmt)
if err != nil {
return nil, err
}
for _, vm := range vmt {
wg.Add(1)
go func(vm mo.VirtualMachine) {
defer wg.Done()
freeMemory := (int64(vm.Summary.Config.MemorySizeMB) * 1024 * 1024) - (int64(vm.Summary.QuickStats.GuestMemoryUsage) * 1024 * 1024)
event := common.MapStr{
"datacenter": dc.Name(),
"name": vm.Summary.Config.Name,
"cpu": common.MapStr{
"used": common.MapStr{
"mhz": vm.Summary.QuickStats.OverallCpuUsage,
},
},
"memory": common.MapStr{
"used": common.MapStr{
"guest": common.MapStr{
"bytes": (int64(vm.Summary.QuickStats.GuestMemoryUsage) * 1024 * 1024),
},
"host": common.MapStr{
"bytes": (int64(vm.Summary.QuickStats.HostMemoryUsage) * 1024 * 1024),
},
},
"total": common.MapStr{
"guest": common.MapStr{
"bytes": (int64(vm.Summary.Config.MemorySizeMB) * 1024 * 1024),
},
},
"free": common.MapStr{
"guest": common.MapStr{
"bytes": freeMemory,
},
},
},
}
// Get custom fields (attributes) values if get_custom_fields is true.
if m.GetCustomFields {
customFields := getCustomFields(vm.Summary.CustomValue, customFieldsMap)
if len(customFields) > 0 {
event["custom_fields"] = customFields
}
}
mutex.Lock()
events = append(events, event)
mutex.Unlock()
}(vm)
}
}
wg.Wait()
return events, nil
}
func getCustomFields(customFields []types.BaseCustomFieldValue, customFieldsMap map[int32]string) common.MapStr {
outputFields := common.MapStr{}
for _, v := range customFields {
customFieldString := v.(*types.CustomFieldStringValue)
key, ok := customFieldsMap[v.GetCustomFieldValue().Key]
if ok {
// If key has '.', is replaced with '_' to be compatible with ES2.x.
fmtKey := strings.Replace(key, ".", "_", -1)
outputFields.Put(fmtKey, customFieldString.Value)
}
}
return outputFields
}
func setCustomFieldsMap(ctx context.Context, client *vim25.Client) (map[int32]string, error) {
customFieldsMap := make(map[int32]string)
customFieldsManager, err := object.GetCustomFieldsManager(client)
if err != nil {
return nil, errors.Wrap(err, "failed to get custom fields manager")
} else {
field, err := customFieldsManager.Field(ctx)
if err != nil {
return nil, errors.Wrap(err, "failed to get custom fields")
}
for _, def := range field {
customFieldsMap[def.Key] = def.Name
}
}
return customFieldsMap, nil
}