package main
import (
"bytes"
"flag"
"io/ioutil"
"os"
"time"
"fmt"
"net/http"
"github.com/nshttpd/mikrotik-exporter/collector"
"github.com/nshttpd/mikrotik-exporter/config"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/prometheus/common/version"
log "github.com/sirupsen/logrus"
)
// single device can be defined via CLI flags, mutliple via config file.
var (
device = flag.String("device", "", "single device to monitor")
address = flag.String("address", "", "address of the device to monitor")
user = flag.String("user", "", "user for authentication with single device")
password = flag.String("password", "", "password for authentication for single device")
logLevel = flag.String("log-level", "info", "log level")
logFormat = flag.String("log-format", "json", "logformat text or json (default json)")
port = flag.String("port", ":9090", "port number to listen on")
metricsPath = flag.String("path", "/metrics", "path to answer requests on")
configFile = flag.String("config-file", "", "config file to load")
withBgp = flag.Bool("with-bgp", false, "retrieves BGP routing infrormation")
withRoutes = flag.Bool("with-routes", false, "retrieves routing table information")
withDHCP = flag.Bool("with-dhcp", false, "retrieves DHCP server metrics")
withDHCPv6 = flag.Bool("with-dhcpv6", false, "retrieves DHCPv6 server metrics")
withPools = flag.Bool("with-pools", false, "retrieves IP(v6) pool metrics")
timeout = flag.Duration("timeout", collector.DefaultTimeout*time.Second, "timeout when connecting to routers")
tls = flag.Bool("tls", false, "use tls to connect to routers")
insecure = flag.Bool("insecure", false, "skips verification of server certificate when using TLS (not recommended)")
cfg *config.Config
)
func init() {
prometheus.MustRegister(version.NewCollector("mikrotik_exporter"))
}
func main() {
flag.Parse()
configureLog()
c, err := loadConfig()
if err != nil {
log.Errorf("Could not load config: %v", err)
os.Exit(3)
}
cfg = c
startServer()
}
func configureLog() {
ll, err := log.ParseLevel(*logLevel)
if err != nil {
panic(err)
}
log.SetLevel(ll)
}
func loadConfig() (*config.Config, error) {
if *configFile != "" {
return loadConfigFromFile()
}
return loadConfigFromFlags()
}
func loadConfigFromFile() (*config.Config, error) {
b, err := ioutil.ReadFile(*configFile)
if err != nil {
return nil, err
}
return config.Load(bytes.NewReader(b))
}
func loadConfigFromFlags() (*config.Config, error) {
if *device == "" || *address == "" || *user == "" || *password == "" {
return nil, fmt.Errorf("missing required param for single device configuration")
}
return &config.Config{
Devices: []config.Device{
config.Device{
Name: *device,
Address: *address,
User: *user,
Password: *password,
},
},
}, nil
}
func startServer() {
h, err := createMetricsHandler()
if err != nil {
log.Fatal(err)
}
http.Handle(*metricsPath, h)
http.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("ok"))
})
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(`
Mikrotik Exporter
Mikrotik Exporter
Metrics
`))
})
log.Info("Listening on", *port)
log.Fatal(http.ListenAndServe(*port, nil))
}
func createMetricsHandler() (http.Handler, error) {
opts := collectorOptions()
nc, err := collector.NewCollector(cfg, opts...)
if err != nil {
return nil, err
}
registry := prometheus.NewRegistry()
err = registry.Register(nc)
if err != nil {
return nil, err
}
return promhttp.HandlerFor(registry,
promhttp.HandlerOpts{
ErrorLog: log.New(),
ErrorHandling: promhttp.ContinueOnError,
}), nil
}
func collectorOptions() []collector.Option {
opts := []collector.Option{}
if *withBgp || cfg.Features.BGP {
opts = append(opts, collector.WithBGP())
}
if *withRoutes || cfg.Features.Routes {
opts = append(opts, collector.WithRoutes())
}
if *withDHCP || cfg.Features.DHCP {
opts = append(opts, collector.WithDHCP())
}
if *withDHCPv6 || cfg.Features.DHCPv6 {
opts = append(opts, collector.WithDHCPv6())
}
if *withPools || cfg.Features.Pools {
opts = append(opts, collector.WithPools())
}
if *timeout != collector.DefaultTimeout {
opts = append(opts, collector.WithTimeout(*timeout))
}
if *tls {
opts = append(opts, collector.WithTLS(*insecure))
}
return opts
}