mirror of
https://github.com/zrepl/zrepl.git
synced 2024-12-29 10:28:53 +01:00
100 lines
2.7 KiB
Go
100 lines
2.7 KiB
Go
package cmd
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import (
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"context"
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"github.com/mitchellh/mapstructure"
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"github.com/pkg/errors"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"github.com/zrepl/zrepl/zfs"
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"net"
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"net/http"
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)
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type PrometheusJob struct {
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Name string
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Listen string
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}
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var prom struct {
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taskLastActiveStart *prometheus.GaugeVec
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taskLastActiveDuration *prometheus.GaugeVec
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taskLogEntries *prometheus.CounterVec
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}
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func init() {
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prom.taskLastActiveStart = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: "zrepl",
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Subsystem: "daemon",
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Name: "task_last_active_start",
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Help: "point in time at which the job task last left idle state",
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}, []string{"zrepl_job", "job_type", "task"})
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prom.taskLastActiveDuration = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: "zrepl",
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Subsystem: "daemon",
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Name: "task_last_active_duration",
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Help: "seconds that the last run ob a job task spent between leaving and re-entering idle state",
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}, []string{"zrepl_job", "job_type", "task"})
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prom.taskLogEntries = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: "zrepl",
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Subsystem: "daemon",
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Name: "task_log_entries",
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Help: "number of log entries per job task and level",
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}, []string{"zrepl_job", "job_type", "task", "level"})
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prometheus.MustRegister(prom.taskLastActiveStart)
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prometheus.MustRegister(prom.taskLastActiveDuration)
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prometheus.MustRegister(prom.taskLogEntries)
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}
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func parsePrometheusJob(c JobParsingContext, name string, i map[string]interface{}) (j *PrometheusJob, err error) {
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var s struct {
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Listen string
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}
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if err := mapstructure.Decode(i, &s); err != nil {
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return nil, errors.Wrap(err, "mapstructure error")
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}
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if s.Listen == "" {
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return nil, errors.New("must specify 'listen' attribute")
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}
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return &PrometheusJob{name, s.Listen}, nil
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}
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func (j *PrometheusJob) JobName() string { return j.Name }
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func (j *PrometheusJob) JobType() JobType { return JobTypePrometheus }
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func (j *PrometheusJob) JobStart(ctx context.Context) {
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if err := zfs.PrometheusRegister(prometheus.DefaultRegisterer); err != nil {
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panic(err)
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}
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log := ctx.Value(contextKeyLog).(Logger)
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task := NewTask("main", j, log)
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log = task.Log()
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l, err := net.Listen("tcp", j.Listen)
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if err != nil {
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log.WithError(err).Error("cannot listen")
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}
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go func() {
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select {
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case <-ctx.Done():
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l.Close()
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}
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}()
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mux := http.NewServeMux()
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mux.Handle("/metrics", promhttp.Handler())
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err = http.Serve(l, mux)
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if err != nil {
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log.WithError(err).Error("error while serving")
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}
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}
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func (*PrometheusJob) JobStatus(ctxt context.Context) (*JobStatus, error) {
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return &JobStatus{}, nil
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}
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