/
performanceCounters.go
142 lines (111 loc) · 3.87 KB
/
performanceCounters.go
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package main
import (
"context"
"encoding/csv"
"flag"
"fmt"
"log"
"net/url"
"os"
"strings"
"github.com/vmware/govmomi"
"github.com/vmware/govmomi/vim25/mo"
)
// GetEnvString returns string from environment variable.
func GetEnvString(v string, def string) string {
r := os.Getenv(v)
if r == "" {
return def
}
return r
}
// GetEnvBool returns boolean from environment variable.
func GetEnvBool(v string, def bool) bool {
r := os.Getenv(v)
if r == "" {
return def
}
switch strings.ToLower(r[0:1]) {
case "t", "y", "1":
return true
}
return false
}
const (
envURL = "GOVMOMI_URL"
envUserName = "GOVMOMI_USERNAME"
envPassword = "GOVMOMI_PASSWORD"
envInsecure = "GOVMOMI_INSECURE"
)
var urlDescription = fmt.Sprintf("ESX or vCenter URL [%s]", envURL)
var urlFlag = flag.String("url", GetEnvString(envURL, "https://username:password@host/sdk"), urlDescription)
var insecureDescription = fmt.Sprintf("Don't verify the server's certificate chain [%s]", envInsecure)
var insecureFlag = flag.Bool("insecure", GetEnvBool(envInsecure, false), insecureDescription)
func processOverride(u *url.URL) {
envUsername := os.Getenv(envUserName)
envPassword := os.Getenv(envPassword)
// Override username if provided
if envUsername != "" {
var password string
var ok bool
if u.User != nil {
password, ok = u.User.Password()
}
if ok {
u.User = url.UserPassword(envUsername, password)
} else {
u.User = url.User(envUsername)
}
}
// Override password if provided
if envPassword != "" {
var username string
if u.User != nil {
username = u.User.Username()
}
u.User = url.UserPassword(username, envPassword)
}
}
func exit(err error) {
fmt.Fprintf(os.Stderr, "Error: %s\n", err)
os.Exit(1)
}
func main() {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
flag.Parse()
// Parse URL from string
u, err := url.Parse(*urlFlag)
if err != nil {
exit(err)
}
fmt.Println("u:", u)
// Override username and/or password as required
processOverride(u)
// Connect and log in to ESX or vCenter
client, err := govmomi.NewClient(ctx, u, *insecureFlag)
if err != nil {
exit(err)
}
if client.IsVC() {
fmt.Println("connected to vCenter")
} else {
fmt.Println("connected to ESXi host")
}
var perfManager mo.PerformanceManager
err = client.RetrieveOne(ctx, *client.ServiceContent.PerfManager, nil, &perfManager)
perfCounters := perfManager.PerfCounter
counterDetails := make([][]string, 0)
for _, perfCounter := range perfCounters {
groupInfo := perfCounter.GroupInfo.GetElementDescription()
nameInfo := perfCounter.NameInfo.GetElementDescription()
fullName := groupInfo.Key + "." + nameInfo.Key + "." + fmt.Sprint(perfCounter.RollupType)
counterDetails = append(counterDetails, []string{fullName, fmt.Sprint(perfCounter.Level), nameInfo.Summary})
}
outputFile, err := os.Create("performanceCounters.csv")
csvWriter := csv.NewWriter(outputFile)
csvWriter.WriteAll(counterDetails)
if err := csvWriter.Error(); err != nil {
log.Fatalln("error writing csv:", err)
}
}