/
main.go
131 lines (119 loc) · 3.42 KB
/
main.go
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package main
import (
"flag"
"fmt"
"github.com/spf13/viper"
"gopkg.in/ldap.v1"
"log"
"net"
"time"
)
const APP_VERSION = "0.5"
const DEBUG = false
// The flag package provides a default help printer via -h switch
var versionFlag *bool = flag.Bool("v", false, "Print the version number.")
// Initialize Configuration
func InitializeConfig() {
viper.SetConfigName("config")
viper.AddConfigPath("/etc/cnmonitor2graphite/")
viper.AddConfigPath("$HOME/.cnmonitor2graphite/")
viper.Set("Verbose", true)
viper.SetConfigType("toml")
err := viper.ReadInConfig()
if err != nil {
panic(fmt.Errorf("Fatal error config file: %s \n", err))
}
}
//Fetch Data from ldap
func FetchData(ldapuri, user, passwd, baseDN, filter string, Attributes []string) *ldap.SearchResult {
if DEBUG {
log.Println("Connect to ldap and read data")
}
l, err := ldap.Dial("tcp", ldapuri)
if err != nil {
log.Fatalf("ERROR: %s\n", err.Error())
}
defer l.Close()
// l.Debug = true
err = l.Bind(user, passwd)
if err != nil {
log.Printf("ERROR: Cannot bind: %s\n", err.Error())
return nil
}
search := ldap.NewSearchRequest(
baseDN,
ldap.ScopeBaseObject, ldap.NeverDerefAliases, 0, 0, false,
filter,
Attributes,
nil)
sr, err := l.Search(search)
if err != nil {
log.Fatalf("ERROR: %s\n", err.Error())
return nil
}
if DEBUG {
log.Printf("BaseDN: %s -- Search: %s -> num of entries = %d\n", baseDN, search.Filter, len(sr.Entries))
}
return sr
}
//Sent data to graphite
func SentData(graphite, prefix string, result *ldap.SearchResult) {
t := time.Now().Unix()
if DEBUG {
log.Println("Connect to", graphite, "and sent data")
}
conn, err := net.Dial("tcp", graphite)
if err != nil {
if DEBUG {
log.Printf("ERROR: Cannot connect: %s\n", err.Error())
}
return
}
defer conn.Close()
for _, entry := range result.Entries {
for _, attr := range entry.Attributes {
fmt.Fprintf(conn, "%s.%s %s %d\n", prefix, attr.Name, attr.ByteValues[0], t)
}
}
}
//Show data for graphite
func ShowData(graphite, prefix string, result *ldap.SearchResult) {
t := time.Now().Unix()
for _, entry := range result.Entries {
for _, attr := range entry.Attributes {
fmt.Printf("%s.%s %s %d\n", prefix, attr.Name, attr.ByteValues[0], t)
}
}
}
func main() {
flag.Parse() // Scan the arguments list
InitializeConfig()
graphite := fmt.Sprintf("%s%s%s", viper.GetString("graphite.host"), ":", viper.GetString("graphite.port"))
prefix := fmt.Sprintf("%s", viper.GetString("graphite.prefix"))
if *versionFlag {
fmt.Println("cnm2g: Cn=monitor to Graphite")
fmt.Println("Version:", APP_VERSION)
fmt.Println("Config File >>>", viper.ConfigFileUsed())
fmt.Println("Graphite >>>", graphite)
fmt.Println("Prefix >>>", prefix)
return
}
ldapmap := viper.GetStringMap("ldap")
dnmap := viper.GetStringMap("dn")
for ldap, _ := range ldapmap {
ldapuri := viper.GetString(fmt.Sprintf("ldap.%s.uri", ldap))
ldapuser := viper.GetString(fmt.Sprintf("ldap.%s.user", ldap))
ldappass := viper.GetString(fmt.Sprintf("ldap.%s.pass", ldap))
for dn, _ := range dnmap {
prefixldap := fmt.Sprintf("%s.%s.%s", prefix, ldap, dn)
data := viper.GetStringSlice(fmt.Sprintf("dn.%s.data", dn))
basedn := viper.GetString(fmt.Sprintf("dn.%s.dn", dn))
ldapresult := FetchData(ldapuri, ldapuser, ldappass, basedn, "(objectclass=*)", data)
if DEBUG {
ShowData(graphite, prefixldap, ldapresult)
} else {
SentData(graphite, prefixldap, ldapresult)
}
}
}
}