2021-05-21 16:35:44 +00:00
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//
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// DISCLAIMER
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//
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// Copyright 2021 ArangoDB GmbH, Cologne, Germany
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Copyright holder is ArangoDB GmbH, Cologne, Germany
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//
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// Author Adam Janikowski
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//
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package main
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import (
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2021-11-03 13:24:59 +00:00
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"context"
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2021-05-21 16:35:44 +00:00
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"io/ioutil"
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"os"
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"os/signal"
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"syscall"
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"time"
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"github.com/arangodb/kube-arangodb/pkg/exporter"
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2021-11-03 13:24:59 +00:00
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"github.com/arangodb/kube-arangodb/pkg/util"
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2021-05-21 16:35:44 +00:00
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"github.com/rs/zerolog/log"
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"github.com/spf13/cobra"
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)
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var (
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cmdExporter = &cobra.Command{
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Use: "exporter",
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Run: cmdExporterCheck,
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}
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exporterInput struct {
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listenAddress string
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endpoint string
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jwtFile string
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timeout time.Duration
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keyfile string
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}
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)
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func init() {
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f := cmdExporter.PersistentFlags()
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f.StringVar(&exporterInput.listenAddress, "server.address", ":9101", "Address the exporter will listen on (IP:port)")
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f.StringVar(&exporterInput.keyfile, "ssl.keyfile", "", "File containing TLS certificate used for the metrics server. Format equal to ArangoDB keyfiles")
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f.StringVar(&exporterInput.endpoint, "arangodb.endpoint", "http://127.0.0.1:8529", "Endpoint used to reach the ArangoDB server")
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f.StringVar(&exporterInput.jwtFile, "arangodb.jwt-file", "", "File containing the JWT for authentication with ArangoDB server")
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f.DurationVar(&exporterInput.timeout, "arangodb.timeout", time.Second*15, "Timeout of statistics requests for ArangoDB")
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cmdMain.AddCommand(cmdExporter)
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}
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func cmdExporterCheck(cmd *cobra.Command, args []string) {
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if err := cmdExporterCheckE(); err != nil {
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log.Error().Err(err).Msgf("Fatal")
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os.Exit(1)
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}
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}
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func onSigterm(f func()) {
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sigs := make(chan os.Signal, 1)
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signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
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go func() {
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defer f()
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<-sigs
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}()
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}
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func cmdExporterCheckE() error {
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p, err := exporter.NewPassthru(exporterInput.endpoint, func() (string, error) {
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if exporterInput.jwtFile == "" {
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return "", nil
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}
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data, err := ioutil.ReadFile(exporterInput.jwtFile)
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if err != nil {
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return "", err
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}
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return string(data), nil
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}, false, 15*time.Second)
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if err != nil {
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return err
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}
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2021-11-03 13:24:59 +00:00
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mon := exporter.NewMonitor(exporterInput.endpoint, func() (string, error) {
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if exporterInput.jwtFile == "" {
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return "", nil
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}
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data, err := ioutil.ReadFile(exporterInput.jwtFile)
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if err != nil {
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return "", err
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}
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return string(data), nil
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}, false, 15*time.Second)
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go mon.UpdateMonitorStatus(util.CreateSignalContext(context.Background()))
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2021-05-21 16:35:44 +00:00
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exporter := exporter.NewExporter(exporterInput.listenAddress, "/metrics", p)
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if exporterInput.keyfile != "" {
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if e, err := exporter.WithKeyfile(exporterInput.keyfile); err != nil {
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return err
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} else {
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if r, err := e.Start(); err != nil {
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return err
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} else {
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onSigterm(r.Stop)
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return r.Wait()
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}
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}
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} else {
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if r, err := exporter.Start(); err != nil {
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return err
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} else {
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onSigterm(r.Stop)
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return r.Wait()
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}
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}
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}
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