Remove `prometheus_` prefix from metrics

This can now be added by users of the library as needed with the new
https://godoc.org/github.com/prometheus/client_golang/prometheus#WrapRegistererWithPrefix

Signed-off-by: beorn7 <beorn@soundcloud.com>

compact.go

@@ -84,30 +84,30 @@ func newCompactorMetrics(r prometheus.Registerer) *compactorMetrics {
 	m := &compactorMetrics{}
 
 	m.ran = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_compactions_total",
+		Name: "tsdb_compactions_total",
 		Help: "Total number of compactions that were executed for the partition.",
 	})
 	m.failed = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_compactions_failed_total",
+		Name: "tsdb_compactions_failed_total",
 		Help: "Total number of compactions that failed for the partition.",
 	})
 	m.duration = prometheus.NewHistogram(prometheus.HistogramOpts{
-		Name:    "prometheus_tsdb_compaction_duration_seconds",
+		Name:    "tsdb_compaction_duration_seconds",
 		Help:    "Duration of compaction runs",
 		Buckets: prometheus.ExponentialBuckets(1, 2, 10),
 	})
 	m.chunkSize = prometheus.NewHistogram(prometheus.HistogramOpts{
-		Name:    "prometheus_tsdb_compaction_chunk_size_bytes",
+		Name:    "tsdb_compaction_chunk_size_bytes",
 		Help:    "Final size of chunks on their first compaction",
 		Buckets: prometheus.ExponentialBuckets(32, 1.5, 12),
 	})
 	m.chunkSamples = prometheus.NewHistogram(prometheus.HistogramOpts{
-		Name:    "prometheus_tsdb_compaction_chunk_samples",
+		Name:    "tsdb_compaction_chunk_samples",
 		Help:    "Final number of samples on their first compaction",
 		Buckets: prometheus.ExponentialBuckets(4, 1.5, 12),
 	})
 	m.chunkRange = prometheus.NewHistogram(prometheus.HistogramOpts{
-		Name:    "prometheus_tsdb_compaction_chunk_range_seconds",
+		Name:    "tsdb_compaction_chunk_range_seconds",
 		Help:    "Final time range of chunks on their first compaction",
 		Buckets: prometheus.ExponentialBuckets(100, 4, 10),
 	})

db.go

@@ -133,7 +133,7 @@ func newDBMetrics(db *DB, r prometheus.Registerer) *dbMetrics {
 	m := &dbMetrics{}
 
 	m.loadedBlocks = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
-		Name: "prometheus_tsdb_blocks_loaded",
+		Name: "tsdb_blocks_loaded",
 		Help: "Number of currently loaded data blocks",
 	}, func() float64 {
 		db.mtx.RLock()
@@ -141,7 +141,7 @@ func newDBMetrics(db *DB, r prometheus.Registerer) *dbMetrics {
 		return float64(len(db.blocks))
 	})
 	m.symbolTableSize = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
-		Name: "prometheus_tsdb_symbol_table_size_bytes",
+		Name: "tsdb_symbol_table_size_bytes",
 		Help: "Size of symbol table on disk (in bytes)",
 	}, func() float64 {
 		db.mtx.RLock()
@@ -154,27 +154,27 @@ func newDBMetrics(db *DB, r prometheus.Registerer) *dbMetrics {
 		return float64(symTblSize)
 	})
 	m.reloads = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_reloads_total",
+		Name: "tsdb_reloads_total",
 		Help: "Number of times the database reloaded block data from disk.",
 	})
 	m.reloadsFailed = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_reloads_failures_total",
+		Name: "tsdb_reloads_failures_total",
 		Help: "Number of times the database failed to reload block data from disk.",
 	})
 	m.compactionsTriggered = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_compactions_triggered_total",
+		Name: "tsdb_compactions_triggered_total",
 		Help: "Total number of triggered compactions for the partition.",
 	})
 	m.cutoffs = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_retention_cutoffs_total",
+		Name: "tsdb_retention_cutoffs_total",
 		Help: "Number of times the database cut off block data from disk.",
 	})
 	m.cutoffsFailed = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_retention_cutoffs_failures_total",
+		Name: "tsdb_retention_cutoffs_failures_total",
 		Help: "Number of times the database failed to cut off block data from disk.",
 	})
 	m.startTime = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
-		Name: "prometheus_tsdb_lowest_timestamp",
+		Name: "tsdb_lowest_timestamp",
 		Help: "Lowest timestamp value stored in the database.",
 	}, func() float64 {
 		db.mtx.RLock()
@@ -185,7 +185,7 @@ func newDBMetrics(db *DB, r prometheus.Registerer) *dbMetrics {
 		return float64(db.blocks[0].meta.MinTime)
 	})
 	m.tombCleanTimer = prometheus.NewHistogram(prometheus.HistogramOpts{
-		Name: "prometheus_tsdb_tombstone_cleanup_seconds",
+		Name: "tsdb_tombstone_cleanup_seconds",
 		Help: "The time taken to recompact blocks to remove tombstones.",
 	})
 

head.go

@@ -95,59 +95,59 @@ func newHeadMetrics(h *Head, r prometheus.Registerer) *headMetrics {
 	m := &headMetrics{}
 
 	m.activeAppenders = prometheus.NewGauge(prometheus.GaugeOpts{
-		Name: "prometheus_tsdb_head_active_appenders",
+		Name: "tsdb_head_active_appenders",
 		Help: "Number of currently active appender transactions",
 	})
 	m.series = prometheus.NewGauge(prometheus.GaugeOpts{
-		Name: "prometheus_tsdb_head_series",
+		Name: "tsdb_head_series",
 		Help: "Total number of series in the head block.",
 	})
 	m.seriesCreated = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_head_series_created_total",
+		Name: "tsdb_head_series_created_total",
 		Help: "Total number of series created in the head",
 	})
 	m.seriesRemoved = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_head_series_removed_total",
+		Name: "tsdb_head_series_removed_total",
 		Help: "Total number of series removed in the head",
 	})
 	m.seriesNotFound = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_head_series_not_found_total",
+		Name: "tsdb_head_series_not_found_total",
 		Help: "Total number of requests for series that were not found.",
 	})
 	m.chunks = prometheus.NewGauge(prometheus.GaugeOpts{
-		Name: "prometheus_tsdb_head_chunks",
+		Name: "tsdb_head_chunks",
 		Help: "Total number of chunks in the head block.",
 	})
 	m.chunksCreated = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_head_chunks_created_total",
+		Name: "tsdb_head_chunks_created_total",
 		Help: "Total number of chunks created in the head",
 	})
 	m.chunksRemoved = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_head_chunks_removed_total",
+		Name: "tsdb_head_chunks_removed_total",
 		Help: "Total number of chunks removed in the head",
 	})
 	m.gcDuration = prometheus.NewSummary(prometheus.SummaryOpts{
-		Name: "prometheus_tsdb_head_gc_duration_seconds",
+		Name: "tsdb_head_gc_duration_seconds",
 		Help: "Runtime of garbage collection in the head block.",
 	})
 	m.maxTime = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
-		Name: "prometheus_tsdb_head_max_time",
+		Name: "tsdb_head_max_time",
 		Help: "Maximum timestamp of the head block.",
 	}, func() float64 {
 		return float64(h.MaxTime())
 	})
 	m.minTime = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
-		Name: "prometheus_tsdb_head_min_time",
+		Name: "tsdb_head_min_time",
 		Help: "Minimum time bound of the head block.",
 	}, func() float64 {
 		return float64(h.MinTime())
 	})
 	m.walTruncateDuration = prometheus.NewSummary(prometheus.SummaryOpts{
-		Name: "prometheus_tsdb_wal_truncate_duration_seconds",
+		Name: "tsdb_wal_truncate_duration_seconds",
 		Help: "Duration of WAL truncation.",
 	})
 	m.samplesAppended = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_head_samples_appended_total",
+		Name: "tsdb_head_samples_appended_total",
 		Help: "Total number of appended samples.",
 	})
 

wal.go

@@ -64,11 +64,11 @@ func newWalMetrics(wal *SegmentWAL, r prometheus.Registerer) *walMetrics {
 	m := &walMetrics{}
 
 	m.fsyncDuration = prometheus.NewSummary(prometheus.SummaryOpts{
-		Name: "prometheus_tsdb_wal_fsync_duration_seconds",
+		Name: "tsdb_wal_fsync_duration_seconds",
 		Help: "Duration of WAL fsync.",
 	})
 	m.corruptions = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_wal_corruptions_total",
+		Name: "tsdb_wal_corruptions_total",
 		Help: "Total number of WAL corruptions.",
 	})
 

wal/wal.go

@@ -190,15 +190,15 @@ func NewSize(logger log.Logger, reg prometheus.Registerer, dir string, segmentSi
 		stopc:       make(chan chan struct{}),
 	}
 	w.fsyncDuration = prometheus.NewSummary(prometheus.SummaryOpts{
-		Name: "prometheus_tsdb_wal_fsync_duration_seconds",
+		Name: "tsdb_wal_fsync_duration_seconds",
 		Help: "Duration of WAL fsync.",
 	})
 	w.pageFlushes = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_wal_page_flushes_total",
+		Name: "tsdb_wal_page_flushes_total",
 		Help: "Total number of page flushes.",
 	})
 	w.pageCompletions = prometheus.NewCounter(prometheus.CounterOpts{
-		Name: "prometheus_tsdb_wal_completed_pages_total",
+		Name: "tsdb_wal_completed_pages_total",
 		Help: "Total number of completed pages.",
 	})
 	if reg != nil {