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add metrics for partitions #254

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27 changes: 27 additions & 0 deletions prometheus/collect_topic_info.go
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,27 @@ func (e *Exporter) collectTopicInfo(ctx context.Context, ch chan<- prometheus.Me
replicationFactor = len(topic.Partitions[0].Replicas)
}

for _, partition := range topic.Partitions {
underReplicated := 0
if len(partition.ISR) < len(partition.Replicas) {
underReplicated = 1
}

ch <- prometheus.MustNewConstMetric(
e.partitionUnderReplicated,
prometheus.GaugeValue,
float64(underReplicated),
topicName, strconv.Itoa(int(partition.Partition)),
)

ch <- prometheus.MustNewConstMetric(
e.partitionLeader,
prometheus.GaugeValue,
float64(partition.Leader),
topicName, strconv.Itoa(int(partition.Partition)),
)
}

var labelsValues []string
labelsValues = append(labelsValues, topicName)
labelsValues = append(labelsValues, strconv.Itoa(partitionCount))
Expand All @@ -79,6 +100,12 @@ func (e *Exporter) collectTopicInfo(ctx context.Context, ch chan<- prometheus.Me
float64(1),
labelsValues...,
)
ch <- prometheus.MustNewConstMetric(
e.topicPartitionCount,
prometheus.GaugeValue,
float64(partitionCount),
topicName,
)
}
return isOk
}
Expand Down
34 changes: 29 additions & 5 deletions prometheus/exporter.go
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Original file line number Diff line number Diff line change
Expand Up @@ -32,11 +32,14 @@ type Exporter struct {
topicLogDirSize *prometheus.Desc

// Topic / Partition
topicInfo *prometheus.Desc
topicHighWaterMarkSum *prometheus.Desc
partitionHighWaterMark *prometheus.Desc
topicLowWaterMarkSum *prometheus.Desc
partitionLowWaterMark *prometheus.Desc
topicInfo *prometheus.Desc
topicHighWaterMarkSum *prometheus.Desc
partitionHighWaterMark *prometheus.Desc
topicLowWaterMarkSum *prometheus.Desc
partitionLowWaterMark *prometheus.Desc
topicPartitionCount *prometheus.Desc
partitionUnderReplicated *prometheus.Desc
partitionLeader *prometheus.Desc

// Consumer Groups
consumerGroupInfo *prometheus.Desc
Expand Down Expand Up @@ -143,6 +146,27 @@ func (e *Exporter) InitializeMetrics() {
nil,
)

e.topicPartitionCount = prometheus.NewDesc(
prometheus.BuildFQName(e.cfg.Namespace, "kafka", "topic_partition_count"),
"Number of topic partitions",
[]string{"topic_name"},
nil,
)

e.partitionLeader = prometheus.NewDesc(
prometheus.BuildFQName(e.cfg.Namespace, "kafka", "topic_partition_leader"),
"Leader Broker id of partition",
[]string{"topic_name", "partition_id"},
nil,
)

e.partitionUnderReplicated = prometheus.NewDesc(
prometheus.BuildFQName(e.cfg.Namespace, "kafka", "topic_under_replicated_partition"),
"Under replicated partition",
[]string{"topic_name", "partition_id"},
nil,
)

// Consumer Group Metrics
// Group Info
e.consumerGroupInfo = prometheus.NewDesc(
Expand Down