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Units with cc-units (#64)

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* Add option to normalize units with cc-unit

* Add unit conversion to router

* Add option to change unit prefix in the router

* Add to MetricRouter README

* Add order of operations in router to README

* Use second add_tags/del_tags only if metric gets renamed
This commit is contained in:
Thomas Gruber
2022-05-13 13:30:02 +02:00
committed by GitHub
parent 8068e59818
commit 80d92d6d28
2 changed files with 71 additions and 2 deletions
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41
internal/metricRouter/metricRouter.go
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@@ -12,6 +12,7 @@ import (
lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
agg "github.com/ClusterCockpit/cc-metric-collector/internal/metricAggregator"
mct "github.com/ClusterCockpit/cc-metric-collector/internal/multiChanTicker"
units "github.com/ClusterCockpit/cc-units"
)
const ROUTER_MAX_FORWARD = 50
@@ -35,6 +36,8 @@ type metricRouterConfig struct {
IntervalStamp bool `json:"interval_timestamp"` // Update timestamp periodically by ticker each interval?
NumCacheIntervals int `json:"num_cache_intervals"` // Number of intervals of cached metrics for evaluation
MaxForward int `json:"max_forward"` // Number of maximal forwarded metrics at one select
NormalizeUnits bool `json:"normalize_units"` // Check unit meta flag and normalize it using cc-units
ChangeUnitPrefix map[string]string `json:"change_unit_prefix"` // Add prefix that should be applied to the metrics
dropMetrics map[string]bool // Internal map for O(1) lookup
}
@@ -207,6 +210,38 @@ func (r *metricRouter) dropMetric(point lp.CCMetric) bool {
return false
}
func (r *metricRouter) prepareUnit(point lp.CCMetric) bool {
if r.config.NormalizeUnits {
if in_unit, ok := point.GetMeta("unit"); ok {
u := units.NewUnit(in_unit)
if u.Valid() {
point.AddMeta("unit", u.Short())
}
}
}
if newP, ok := r.config.ChangeUnitPrefix[point.Name()]; ok {
newPrefix := units.NewPrefix(newP)
if in_unit, ok := point.GetMeta("unit"); ok && newPrefix != units.InvalidPrefix {
u := units.NewUnit(in_unit)
if u.Valid() {
cclog.ComponentDebug("MetricRouter", "Change prefix to", newP, "for metric", point.Name())
conv, out_unit := units.GetUnitPrefixFactor(u, newPrefix)
if conv != nil && out_unit.Valid() {
if val, ok := point.GetField("value"); ok {
point.AddField("value", conv(val))
point.AddMeta("unit", out_unit.Short())
}
}
}
}
}
return true
}
// Start starts the metric router
func (r *metricRouter) Start() {
// start timer if configured
@@ -232,9 +267,11 @@ func (r *metricRouter) Start() {
if new, ok := r.config.RenameMetrics[name]; ok {
point.SetName(new)
point.AddMeta("oldname", name)
r.DoAddTags(point)
r.DoDelTags(point)
}
r.DoAddTags(point)
r.DoDelTags(point)
r.prepareUnit(point)
for _, o := range r.outputs {
o <- point