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mongotop.go
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mongotop.go
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// Copyright (C) MongoDB, Inc. 2014-present.
//
// 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
// Main package for the mongotop tool.
package main
import (
"os"
"time"
"github.com/huimingz/mongo-tools/common/db"
"github.com/huimingz/mongo-tools/common/log"
"github.com/huimingz/mongo-tools/common/signals"
"github.com/huimingz/mongo-tools/common/util"
"github.com/huimingz/mongo-tools/mongotop"
"go.mongodb.org/mongo-driver/mongo/readpref"
)
var (
VersionStr = "built-without-version-string"
GitCommit = "build-without-git-commit"
)
func main() {
// initialize command-line opts
opts, err := mongotop.ParseOptions(os.Args[1:], VersionStr, GitCommit)
if err != nil {
log.Logvf(log.Always, "error parsing command line options: %s", err.Error())
log.Logvf(log.Always, util.ShortUsage("mongotop"))
os.Exit(util.ExitFailure)
}
// print help, if specified
if opts.PrintHelp(false) {
return
}
// print version, if specified
if opts.PrintVersion() {
return
}
log.SetVerbosity(opts.Verbosity)
signals.Handle()
// verify uri options and log them
opts.URI.LogUnsupportedOptions()
if opts.RowCount < 0 {
log.Logvf(log.Always, "invalid value for --rowcount: %v", opts.RowCount)
os.Exit(util.ExitFailure)
}
if opts.Auth.Username != "" && opts.Auth.Source == "" && !opts.Auth.RequiresExternalDB() {
if opts.URI != nil && opts.URI.ConnectionString != "" {
log.Logvf(log.Always, "authSource is required when authenticating against a non $external database")
os.Exit(util.ExitFailure)
}
log.Logvf(log.Always, "--authenticationDatabase is required when authenticating against a non $external database")
os.Exit(util.ExitFailure)
}
if opts.ReplicaSetName == "" {
opts.ReadPreference = readpref.PrimaryPreferred()
}
// create a session provider to connect to the db
sessionProvider, err := db.NewSessionProvider(*opts.ToolOptions)
if err != nil {
log.Logvf(log.Always, "error connecting to host: %v", err)
os.Exit(util.ExitFailure)
}
// fail fast if connecting to a mongos
isMongos, err := sessionProvider.IsMongos()
if err != nil {
log.Logvf(log.Always, "Failed: %v", err)
os.Exit(util.ExitFailure)
}
if isMongos {
log.Logvf(log.Always, "cannot run mongotop against a mongos")
os.Exit(util.ExitFailure)
}
// instantiate a mongotop instance
top := &mongotop.MongoTop{
Options: opts.ToolOptions,
OutputOptions: opts.Output,
SessionProvider: sessionProvider,
Sleeptime: time.Duration(opts.SleepTime) * time.Second,
}
// kick it off
if err := top.Run(); err != nil {
log.Logvf(log.Always, "Failed: %v", err)
os.Exit(util.ExitFailure)
}
}