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bcache: add writeback_rate_debug stats (#1658) 

* bcache: add writeback_rate_debug export

Signed-off-by: Aleksei Zakharov <zaharov@selectel.ru>
pull/1821/head
Aleksei Zakharov 4 years ago committed by GitHub
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  1. 40
      collector/bcache_linux.go
  2. 15
      collector/fixtures/e2e-output.txt

40
collector/bcache_linux.go
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@ -234,6 +234,46 @@ func (c *bcacheCollector) updateBcacheStats(ch chan<- prometheus.Metric, s *bcac
extraLabel: []string{"backing_device"},
extraLabelValue: bdev.Name,
},
{
name: "dirty_target_bytes",
desc: "Current dirty data target threshold for this backing device in bytes.",
value: float64(bdev.WritebackRateDebug.Target),
metricType: prometheus.GaugeValue,
extraLabel: []string{"backing_device"},
extraLabelValue: bdev.Name,
},
{
name: "writeback_rate",
desc: "Current writeback rate for this backing device in bytes.",
value: float64(bdev.WritebackRateDebug.Rate),
metricType: prometheus.GaugeValue,
extraLabel: []string{"backing_device"},
extraLabelValue: bdev.Name,
},
{
name: "writeback_rate_proportinal_term",
desc: "Current result of proportional controller, part of writeback rate",
value: float64(bdev.WritebackRateDebug.Proportional),
metricType: prometheus.GaugeValue,
extraLabel: []string{"backing_device"},
extraLabelValue: bdev.Name,
},
{
name: "writeback_rate_integral_term",
desc: "Current result of integral controller, part of writeback rate",
value: float64(bdev.WritebackRateDebug.Integral),
metricType: prometheus.GaugeValue,
extraLabel: []string{"backing_device"},
extraLabelValue: bdev.Name,
},
{
name: "writeback_change",
desc: "Last writeback rate change step for this backing device.",
value: float64(bdev.WritebackRateDebug.Change),
metricType: prometheus.GaugeValue,
extraLabel: []string{"backing_device"},
extraLabelValue: bdev.Name,
},
}
allMetrics = append(allMetrics, metrics...)

15
collector/fixtures/e2e-output.txt
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@ -106,6 +106,9 @@ node_bcache_congested{uuid="deaddd54-c735-46d5-868e-f331c5fd7c74"} 0
# HELP node_bcache_dirty_data_bytes Amount of dirty data for this backing device in the cache.
# TYPE node_bcache_dirty_data_bytes gauge
node_bcache_dirty_data_bytes{backing_device="bdev0",uuid="deaddd54-c735-46d5-868e-f331c5fd7c74"} 0
# HELP node_bcache_dirty_target_bytes Current dirty data target threshold for this backing device in bytes.
# TYPE node_bcache_dirty_target_bytes gauge
node_bcache_dirty_target_bytes{backing_device="bdev0",uuid="deaddd54-c735-46d5-868e-f331c5fd7c74"} 2.189426688e+10
# HELP node_bcache_io_errors Number of errors that have occurred, decayed by io_error_halflife.
# TYPE node_bcache_io_errors gauge
node_bcache_io_errors{cache_device="cache0",uuid="deaddd54-c735-46d5-868e-f331c5fd7c74"} 0
@ -124,6 +127,18 @@ node_bcache_root_usage_percent{uuid="deaddd54-c735-46d5-868e-f331c5fd7c74"} 0
# HELP node_bcache_tree_depth Depth of the btree.
# TYPE node_bcache_tree_depth gauge
node_bcache_tree_depth{uuid="deaddd54-c735-46d5-868e-f331c5fd7c74"} 0
# HELP node_bcache_writeback_change Last writeback rate change step for this backing device.
# TYPE node_bcache_writeback_change gauge
node_bcache_writeback_change{backing_device="bdev0",uuid="deaddd54-c735-46d5-868e-f331c5fd7c74"} 329204
# HELP node_bcache_writeback_rate Current writeback rate for this backing device in bytes.
# TYPE node_bcache_writeback_rate gauge
node_bcache_writeback_rate{backing_device="bdev0",uuid="deaddd54-c735-46d5-868e-f331c5fd7c74"} 1.150976e+06
# HELP node_bcache_writeback_rate_integral_term Current result of integral controller, part of writeback rate
# TYPE node_bcache_writeback_rate_integral_term gauge
node_bcache_writeback_rate_integral_term{backing_device="bdev0",uuid="deaddd54-c735-46d5-868e-f331c5fd7c74"} 808960
# HELP node_bcache_writeback_rate_proportinal_term Current result of proportional controller, part of writeback rate
# TYPE node_bcache_writeback_rate_proportinal_term gauge
node_bcache_writeback_rate_proportinal_term{backing_device="bdev0",uuid="deaddd54-c735-46d5-868e-f331c5fd7c74"} 437748
# HELP node_bcache_written_bytes_total Sum of all data that has been written to the cache.
# TYPE node_bcache_written_bytes_total counter
node_bcache_written_bytes_total{cache_device="cache0",uuid="deaddd54-c735-46d5-868e-f331c5fd7c74"} 0

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