118 lines
2.7 KiB
Go
118 lines
2.7 KiB
Go
package main
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import (
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"bufio"
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"bytes"
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"flag"
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"fmt"
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"io"
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"log"
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"net/http"
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"os"
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)
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const version string = "0.5.3"
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var (
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showVersion = flag.Bool("version", false, "Print version information.")
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listenAddress = flag.String("web.listen-address", ":9200", "Address on which to expose metrics and web interface.")
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metricsPath = flag.String("web.telemetry-path", "/metrics", "Path under which to expose metrics.")
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birdClient = flag.String("bird.client", "birdc", "Binary to communicate with the bird routing daemon")
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birdEnabled = flag.Bool("bird.ipv4", true, "Get protocols from bird")
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bird6Enabled = flag.Bool("bird.ipv6", true, "Get protocols from bird6")
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)
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func init() {
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flag.Usage = func() {
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fmt.Println("Usage: bird_exporter [ ... ]\n\nParameters:\n")
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flag.PrintDefaults()
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}
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}
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func main() {
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flag.Parse()
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if *showVersion {
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printVersion()
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os.Exit(0)
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}
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startServer()
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}
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func printVersion() {
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fmt.Println("bird_exporter")
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fmt.Printf("Version: %s\n", version)
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fmt.Println("Metric exporter for bird routing daemon")
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}
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func startServer() {
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fmt.Printf("Starting bird exporter (Version: %s)\n", version)
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http.HandleFunc(*metricsPath, errorHandler(handleMetricsRequest))
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fmt.Printf("Listening for %s on %s\n", *metricsPath, *listenAddress)
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log.Fatal(http.ListenAndServe(*listenAddress, nil))
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}
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func errorHandler(f func(io.Writer, *http.Request) error) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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var buf bytes.Buffer
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wr := bufio.NewWriter(&buf)
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err := f(wr, r)
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wr.Flush()
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if err != nil {
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log.Println(err)
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http.Error(w, err.Error(), http.StatusInternalServerError)
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}
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_, err = w.Write(buf.Bytes())
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if err != nil {
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log.Println(err)
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}
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}
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}
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func handleMetricsRequest(w io.Writer, r *http.Request) error {
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protocols, err := getProtocols()
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if err != nil {
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return err
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}
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for _, p := range protocols {
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switch p.proto {
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case BGP:
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writeForBgpSession(p, w)
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case OSPF:
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writeForOspf(p, w)
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}
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}
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return nil
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}
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func writeForBgpSession(p *protocol, w io.Writer) {
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prefix := fmt.Sprintf("bgp%d_session", p.ipVersion)
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writeForProtocol(p, prefix, w)
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}
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func writeForOspf(p *protocol, w io.Writer) {
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if p.ipVersion == 4 {
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writeForProtocol(p, "ospf", w)
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} else {
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writeForProtocol(p, "ospfv3", w)
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}
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}
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func writeForProtocol(p *protocol, prefix string, w io.Writer) {
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fmt.Fprintf(w, "%s_up{name=\"%s\"} %d\n", prefix, p.name, p.up)
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fmt.Fprintf(w, "%s_prefix_count_import{name=\"%s\"} %d\n", prefix, p.name, p.imported)
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fmt.Fprintf(w, "%s_prefix_count_export{name=\"%s\"} %d\n", prefix, p.name, p.exported)
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fmt.Fprintf(w, "%s_uptime{name=\"%s\"} %d\n", prefix, p.name, p.uptime)
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for k, v := range p.attributes {
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fmt.Fprintf(w, "%s_%s{name=\"%s\"} %v\n", prefix, k, v)
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}
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}
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