|
| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + |
| 6 | + "github.com/prometheus/client_golang/prometheus" |
| 7 | + log "github.com/sirupsen/logrus" |
| 8 | +) |
| 9 | + |
| 10 | +func init() { |
| 11 | + RegisterExporter("aliveness", newExporterAliveness) |
| 12 | +} |
| 13 | + |
| 14 | +var ( |
| 15 | + alivenessLabels = []string{"vhost"} |
| 16 | + |
| 17 | + alivenessGaugeVec = map[string]*prometheus.GaugeVec{ |
| 18 | + "vhost.aliveness": newGaugeVec("aliveness_test", "vhost aliveness test", alivenessLabels), |
| 19 | + } |
| 20 | + |
| 21 | + rabbitmqAlivenessMetric = prometheus.NewGaugeVec( |
| 22 | + prometheus.GaugeOpts{ |
| 23 | + Name: "rabbitmq_aliveness_info", |
| 24 | + Help: "A metric with value 1 status:ok else 0 labeled by aliveness test status, error, reason", |
| 25 | + }, |
| 26 | + []string{"status", "error", "reason"}, |
| 27 | + ) |
| 28 | +) |
| 29 | + |
| 30 | +type exporterAliveness struct { |
| 31 | + alivenessMetrics map[string]*prometheus.GaugeVec |
| 32 | + alivenessInfo AlivenessInfo |
| 33 | +} |
| 34 | + |
| 35 | +type AlivenessInfo struct { |
| 36 | + Status string |
| 37 | + Error string |
| 38 | + Reason string |
| 39 | +} |
| 40 | + |
| 41 | +func newExporterAliveness() Exporter { |
| 42 | + alivenessGaugeVecActual := alivenessGaugeVec |
| 43 | + |
| 44 | + if len(config.ExcludeMetrics) > 0 { |
| 45 | + for _, metric := range config.ExcludeMetrics { |
| 46 | + if alivenessGaugeVecActual[metric] != nil { |
| 47 | + delete(alivenessGaugeVecActual, metric) |
| 48 | + } |
| 49 | + } |
| 50 | + } |
| 51 | + |
| 52 | + return &exporterAliveness{ |
| 53 | + alivenessMetrics: alivenessGaugeVecActual, |
| 54 | + alivenessInfo: AlivenessInfo{}, |
| 55 | + } |
| 56 | +} |
| 57 | + |
| 58 | +func (e *exporterAliveness) Collect(ctx context.Context, ch chan<- prometheus.Metric) error { |
| 59 | + body, contentType, err := apiRequest(config, "aliveness-test") |
| 60 | + if err != nil { |
| 61 | + return err |
| 62 | + } |
| 63 | + |
| 64 | + reply, err := MakeReply(contentType, body) |
| 65 | + if err != nil { |
| 66 | + return err |
| 67 | + } |
| 68 | + |
| 69 | + rabbitMqAlivenessData := reply.MakeMap() |
| 70 | + |
| 71 | + e.alivenessInfo.Status, _ = reply.GetString("status") |
| 72 | + e.alivenessInfo.Error, _ = reply.GetString("error") |
| 73 | + e.alivenessInfo.Reason, _ = reply.GetString("reason") |
| 74 | + |
| 75 | + rabbitmqAlivenessMetric.Reset() |
| 76 | + var flag float64 = 0 |
| 77 | + if e.alivenessInfo.Status == "ok" { |
| 78 | + flag = 1 |
| 79 | + } |
| 80 | + rabbitmqAlivenessMetric.WithLabelValues(e.alivenessInfo.Status, e.alivenessInfo.Error, e.alivenessInfo.Reason).Set(flag) |
| 81 | + |
| 82 | + log.WithField("alivenesswData", rabbitMqAlivenessData).Debug("Aliveness data") |
| 83 | + for key, gauge := range e.alivenessMetrics { |
| 84 | + if value, ok := rabbitMqAlivenessData[key]; ok { |
| 85 | + log.WithFields(log.Fields{"key": key, "value": value}).Debug("Set aliveness metric for key") |
| 86 | + gauge.WithLabelValues(e.alivenessInfo.Status).Set(value) |
| 87 | + } |
| 88 | + } |
| 89 | + |
| 90 | + if ch != nil { |
| 91 | + rabbitmqAlivenessMetric.Collect(ch) |
| 92 | + for _, gauge := range e.alivenessMetrics { |
| 93 | + gauge.Collect(ch) |
| 94 | + } |
| 95 | + } |
| 96 | + return nil |
| 97 | +} |
| 98 | + |
| 99 | +func (e exporterAliveness) Describe(ch chan<- *prometheus.Desc) { |
| 100 | + rabbitmqVersionMetric.Describe(ch) |
| 101 | + for _, gauge := range e.alivenessMetrics { |
| 102 | + gauge.Describe(ch) |
| 103 | + } |
| 104 | +} |
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