145 lines
4.2 KiB
Go
145 lines
4.2 KiB
Go
// Package poller provides the CLI interface to setup unifi-poller.
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package poller
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import (
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"fmt"
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"log"
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"os"
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"strings"
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"time"
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"github.com/spf13/pflag"
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)
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// New returns a new poller struct preloaded with default values.
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// No need to call this if you call Start.c
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func New() *UnifiPoller {
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return &UnifiPoller{
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Config: &Config{
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InfluxURL: defaultInfluxURL,
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InfluxUser: defaultInfluxUser,
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InfluxPass: defaultInfluxPass,
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InfluxDB: defaultInfluxDB,
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UnifiUser: defaultUnifiUser,
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UnifiPass: defaultUnifiUser,
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UnifiBase: defaultUnifiURL,
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Interval: Duration{defaultInterval},
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Sites: []string{"all"},
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HTTPListen: defaultHTTPListen,
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Namespace: appName,
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}, Flag: &Flag{},
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}
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}
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// Start begins the application from a CLI.
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// Parses cli flags, parses config file, parses env vars, sets up logging, then:
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// - dumps a json payload OR - executes Run().
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func (u *UnifiPoller) Start() error {
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log.SetFlags(log.LstdFlags)
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u.Flag.Parse(os.Args[1:])
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if u.Flag.ShowVer {
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fmt.Printf("%s v%s\n", appName, Version)
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return nil // don't run anything else w/ version request.
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}
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if u.Flag.DumpJSON == "" { // do not print this when dumping JSON.
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u.Logf("Loading Configuration File: %s", u.Flag.ConfigFile)
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}
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// Parse config file.
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if err := u.Config.ParseFile(u.Flag.ConfigFile); err != nil {
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u.Flag.Usage()
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return err
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}
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// Update Config with ENV variable overrides.
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if err := u.Config.ParseENV(); err != nil {
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return err
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}
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if u.Flag.DumpJSON != "" {
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return u.DumpJSONPayload()
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}
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if u.Config.Debug {
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log.SetFlags(log.Lshortfile | log.Lmicroseconds | log.Ldate)
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u.LogDebugf("Debug Logging Enabled")
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}
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log.Printf("[INFO] UniFi Poller v%v Starting Up! PID: %d", Version, os.Getpid())
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return u.Run()
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}
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// Parse turns CLI arguments into data structures. Called by Start() on startup.
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func (f *Flag) Parse(args []string) {
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f.FlagSet = pflag.NewFlagSet(appName, pflag.ExitOnError)
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f.Usage = func() {
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fmt.Printf("Usage: %s [--config=/path/to/up.conf] [--version]", appName)
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f.PrintDefaults()
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}
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f.StringVarP(&f.DumpJSON, "dumpjson", "j", "",
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"This debug option prints a json payload and exits. See man page for more info.")
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f.StringVarP(&f.ConfigFile, "config", "c", DefaultConfFile, "Poller config file path.")
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f.BoolVarP(&f.ShowVer, "version", "v", false, "Print the version and exit.")
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_ = f.FlagSet.Parse(args) // pflag.ExitOnError means this will never return error.
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}
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// Run picks a mode and executes the associated functions. This will do one of three things:
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// 1. Start the collector routine that polls unifi and reports to influx on an interval. (default)
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// 2. Run the collector one time and report the metrics to influxdb. (lambda)
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// 3. Start a web server and wait for Prometheus to poll the application for metrics.
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func (u *UnifiPoller) Run() error {
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if err := u.GetUnifi(); err != nil {
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return err
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}
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u.Logf("Polling UniFi Controller at %s v%s as user %s. Sites: %v",
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u.Config.UnifiBase, u.Unifi.ServerVersion, u.Config.UnifiUser, u.Config.Sites)
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switch strings.ToLower(u.Config.Mode) {
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default:
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if err := u.GetInfluxDB(); err != nil {
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return err
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}
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return u.PollController()
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case "influxlambda", "lambdainflux", "lambda_influx", "influx_lambda":
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if err := u.GetInfluxDB(); err != nil {
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return err
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}
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u.LastCheck = time.Now()
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return u.CollectAndProcess()
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case "prometheus", "exporter":
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return u.RunPrometheus()
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}
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}
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// PollController runs forever, polling UniFi and pushing to InfluxDB
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// This is started by Run() after everything checks out.
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func (u *UnifiPoller) PollController() error {
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interval := u.Config.Interval.Round(time.Second)
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log.Printf("[INFO] Everything checks out! Poller started, interval: %v", interval)
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ticker := time.NewTicker(interval)
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defer ticker.Stop()
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for u.LastCheck = range ticker.C {
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var err error
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if u.Config.ReAuth {
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u.LogDebugf("Re-authenticating to UniFi Controller")
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// Some users need to re-auth every interval because the cookie times out.
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if err = u.Unifi.Login(); err != nil {
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u.LogError(err, "re-authenticating")
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}
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}
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if err == nil {
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// Only run this if the authentication procedure didn't return error.
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_ = u.CollectAndProcess()
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}
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if u.errorCount > 0 {
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return fmt.Errorf("too many errors, stopping poller")
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}
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}
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return nil
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}
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