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info.go
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info.go
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/*
Copyright (c) 2017 VMware, Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package metric
import (
"context"
"encoding/json"
"flag"
"fmt"
"io"
"strings"
"text/tabwriter"
"github.com/vmware/govmomi/govc/cli"
"github.com/vmware/govmomi/vim25/types"
)
type info struct {
*PerformanceFlag
}
func init() {
cli.Register("metric.info", &info{})
}
func (cmd *info) Register(ctx context.Context, f *flag.FlagSet) {
cmd.PerformanceFlag, ctx = NewPerformanceFlag(ctx)
cmd.PerformanceFlag.Register(ctx, f)
}
func (cmd *info) Usage() string {
return "PATH [NAME]..."
}
func (cmd *info) Description() string {
return `Metric info for NAME.
If PATH is a value other than '-', provider summary and instance list are included
for the given object type.
If NAME is not specified, all available metrics for the given INTERVAL are listed.
An object PATH must be provided in this case.
Examples:
govc metric.info vm/my-vm
govc metric.info -i 300 vm/my-vm
govc metric.info - cpu.usage.average
govc metric.info /dc1/host/cluster cpu.usage.average`
}
func (cmd *info) Process(ctx context.Context) error {
if err := cmd.PerformanceFlag.Process(ctx); err != nil {
return err
}
return nil
}
type EntityDetail struct {
Realtime bool
Historical bool
Instance []string
}
type MetricInfo struct {
Counter *types.PerfCounterInfo
Enabled []string
PerDeviceEnabled []string
Detail *EntityDetail
}
type infoResult struct {
Info []*MetricInfo
cmd *info
}
func (r *infoResult) Write(w io.Writer) error {
tw := tabwriter.NewWriter(w, 2, 0, 2, ' ', 0)
for _, info := range r.Info {
counter := info.Counter
fmt.Fprintf(tw, "Name:\t%s\n", counter.Name())
fmt.Fprintf(tw, " Label:\t%s\n", counter.NameInfo.GetElementDescription().Label)
fmt.Fprintf(tw, " Summary:\t%s\n", counter.NameInfo.GetElementDescription().Summary)
fmt.Fprintf(tw, " Group:\t%s\n", counter.GroupInfo.GetElementDescription().Label)
fmt.Fprintf(tw, " Unit:\t%s\n", counter.UnitInfo.GetElementDescription().Label)
fmt.Fprintf(tw, " Rollup type:\t%s\n", counter.RollupType)
fmt.Fprintf(tw, " Stats type:\t%s\n", counter.StatsType)
fmt.Fprintf(tw, " Level:\t%d\n", counter.Level)
fmt.Fprintf(tw, " Intervals:\t%s\n", strings.Join(info.Enabled, ","))
fmt.Fprintf(tw, " Per-device level:\t%d\n", counter.PerDeviceLevel)
fmt.Fprintf(tw, " Intervals:\t%s\n", strings.Join(info.PerDeviceEnabled, ","))
summary := info.Detail
if summary == nil {
continue
}
fmt.Fprintf(tw, " Realtime:\t%t\n", summary.Realtime)
fmt.Fprintf(tw, " Historical:\t%t\n", summary.Historical)
fmt.Fprintf(tw, " Instances:\t%s\n", strings.Join(summary.Instance, ","))
}
return tw.Flush()
}
func (r *infoResult) MarshalJSON() ([]byte, error) {
m := make(map[string]*MetricInfo)
for _, info := range r.Info {
m[info.Counter.Name()] = info
}
return json.Marshal(m)
}
func (cmd *info) Run(ctx context.Context, f *flag.FlagSet) error {
if f.NArg() == 0 {
return flag.ErrHelp
}
names := f.Args()[1:]
m, err := cmd.Manager(ctx)
if err != nil {
return err
}
counters, err := m.CounterInfoByName(ctx)
if err != nil {
return err
}
intervals, err := m.HistoricalInterval(ctx)
if err != nil {
return err
}
enabled := intervals.Enabled()
var summary *types.PerfProviderSummary
var mids map[int32][]*types.PerfMetricId
if f.Arg(0) == "-" {
if len(names) == 0 {
return flag.ErrHelp
}
} else {
objs, err := cmd.ManagedObjects(ctx, f.Args()[:1])
if err != nil {
return err
}
summary, err = m.ProviderSummary(ctx, objs[0])
if err != nil {
return err
}
all, err := m.AvailableMetric(ctx, objs[0], cmd.Interval(summary.RefreshRate))
if err != nil {
return err
}
mids = all.ByKey()
if len(names) == 0 {
nc, _ := m.CounterInfoByKey(ctx)
for i := range all {
id := &all[i]
if id.Instance != "" {
continue
}
names = append(names, nc[id.CounterId].Name())
}
}
}
var metrics []*MetricInfo
for _, name := range names {
counter, ok := counters[name]
if !ok {
return cmd.ErrNotFound(name)
}
info := &MetricInfo{
Counter: counter,
Enabled: enabled[counter.Level],
PerDeviceEnabled: enabled[counter.PerDeviceLevel],
}
metrics = append(metrics, info)
if summary == nil {
continue
}
var instances []string
for _, id := range mids[counter.Key] {
if id.Instance != "" {
instances = append(instances, id.Instance)
}
}
info.Detail = &EntityDetail{
Realtime: summary.CurrentSupported,
Historical: summary.SummarySupported,
Instance: instances,
}
}
return cmd.WriteResult(&infoResult{metrics, cmd})
}