MVP: Cost attribution #10269
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,170 @@ | ||
| // SPDX-License-Identifier: AGPL-3.0-only | ||
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| package costattribution | ||
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| import ( | ||
| "context" | ||
| "sort" | ||
| "sync" | ||
| "time" | ||
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| "github.com/go-kit/log" | ||
| "github.com/grafana/dskit/services" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
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| "github.com/grafana/mimir/pkg/util/validation" | ||
| ) | ||
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| const ( | ||
| trackerLabel = "tracker" | ||
| tenantLabel = "tenant" | ||
| defaultTrackerName = "cost-attribution" | ||
| missingValue = "__missing__" | ||
| overflowValue = "__overflow__" | ||
| ) | ||
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| type Manager struct { | ||
| services.Service | ||
| logger log.Logger | ||
| inactiveTimeout time.Duration | ||
| limits *validation.Overrides | ||
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| mtx sync.RWMutex | ||
| trackersByUserID map[string]*Tracker | ||
| reg *prometheus.Registry | ||
| cleanupInterval time.Duration | ||
| metricsExportInterval time.Duration | ||
| } | ||
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| func NewManager(cleanupInterval, exportInterval, inactiveTimeout time.Duration, logger log.Logger, limits *validation.Overrides, reg *prometheus.Registry) (*Manager, error) { | ||
| m := &Manager{ | ||
| trackersByUserID: make(map[string]*Tracker), | ||
| limits: limits, | ||
| mtx: sync.RWMutex{}, | ||
| inactiveTimeout: inactiveTimeout, | ||
| logger: logger, | ||
| reg: reg, | ||
| cleanupInterval: cleanupInterval, | ||
| metricsExportInterval: exportInterval, | ||
| } | ||
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| m.Service = services.NewTimerService(cleanupInterval, nil, m.iteration, nil).WithName("cost attribution manager") | ||
| if err := reg.Register(m); err != nil { | ||
| return nil, err | ||
| } | ||
| return m, nil | ||
| } | ||
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| func (m *Manager) iteration(_ context.Context) error { | ||
| return m.purgeInactiveAttributionsUntil(time.Now().Add(-m.inactiveTimeout).Unix()) | ||
| } | ||
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| func (m *Manager) EnabledForUser(userID string) bool { | ||
| if m == nil { | ||
| return false | ||
| } | ||
| return len(m.limits.CostAttributionLabels(userID)) > 0 | ||
| } | ||
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| func (m *Manager) Tracker(userID string) *Tracker { | ||
| if !m.EnabledForUser(userID) { | ||
| return nil | ||
| } | ||
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| // Check if the tracker already exists, if exists return it. Otherwise lock and create a new tracker. | ||
| m.mtx.RLock() | ||
| tracker, exists := m.trackersByUserID[userID] | ||
| m.mtx.RUnlock() | ||
| if exists { | ||
| return tracker | ||
| } | ||
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| m.mtx.Lock() | ||
| defer m.mtx.Unlock() | ||
| if tracker, exists = m.trackersByUserID[userID]; exists { | ||
| return tracker | ||
| } | ||
| tracker = newTracker(userID, m.limits.CostAttributionLabels(userID), m.limits.MaxCostAttributionCardinalityPerUser(userID), m.limits.CostAttributionCooldown(userID), m.logger) | ||
|
There was a problem hiding this comment. Nit, but I would collect all the information needed to build a tracker (all the |
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| m.trackersByUserID[userID] = tracker | ||
| return tracker | ||
| } | ||
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| func (m *Manager) Collect(out chan<- prometheus.Metric) { | ||
| m.mtx.RLock() | ||
| defer m.mtx.RUnlock() | ||
| for _, tracker := range m.trackersByUserID { | ||
| tracker.Collect(out) | ||
| } | ||
| } | ||
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| func (m *Manager) Describe(chan<- *prometheus.Desc) { | ||
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| // Describe is not implemented because the metrics include dynamic labels. The Manager functions as an unchecked exporter. | ||
| // For more details, refer to the documentation: https://pkg.go.dev/github.com/prometheus/client_golang/prometheus#hdr-Custom_Collectors_and_constant_Metrics | ||
| } | ||
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| func (m *Manager) deleteTracker(userID string) { | ||
| m.mtx.Lock() | ||
| defer m.mtx.Unlock() | ||
| delete(m.trackersByUserID, userID) | ||
| } | ||
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| func (m *Manager) updateTracker(userID string) *Tracker { | ||
| t := m.Tracker(userID) | ||
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| if t == nil { | ||
| m.deleteTracker(userID) | ||
| return nil | ||
| } | ||
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| newTrackedLabels := m.limits.CostAttributionLabels(userID) | ||
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| // sort the labels to ensure the order is consistent | ||
| sort.Slice(newTrackedLabels, func(i, j int) bool { | ||
|
There was a problem hiding this comment. Is it safe to modify the slice returned by There was a problem hiding this comment. modify the copy instead, addressed in 888d8b0 |
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| return newTrackedLabels[i] < newTrackedLabels[j] | ||
| }) | ||
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| if !t.hasSameLabels(newTrackedLabels) { | ||
| m.mtx.Lock() | ||
| t = newTracker(userID, newTrackedLabels, m.limits.MaxCostAttributionCardinalityPerUser(userID), m.limits.CostAttributionCooldown(userID), m.logger) | ||
| m.trackersByUserID[userID] = t | ||
| m.mtx.Unlock() | ||
| return t | ||
| } | ||
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| maxCardinality := m.limits.MaxCostAttributionCardinalityPerUser(userID) | ||
| if t.maxCardinality != maxCardinality { | ||
| t.maxCardinality = maxCardinality | ||
| } | ||
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| cooldown := int64(m.limits.CostAttributionCooldown(userID).Seconds()) | ||
| if cooldown != t.cooldownDuration { | ||
| t.cooldownDuration = cooldown | ||
| } | ||
| return t | ||
| } | ||
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| func (m *Manager) purgeInactiveAttributionsUntil(deadline int64) error { | ||
| m.mtx.RLock() | ||
| userIDs := make([]string, 0, len(m.trackersByUserID)) | ||
| for userID := range m.trackersByUserID { | ||
| userIDs = append(userIDs, userID) | ||
| } | ||
| m.mtx.RUnlock() | ||
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| for _, userID := range userIDs { | ||
| t := m.updateTracker(userID) | ||
| if t == nil { | ||
| continue | ||
| } | ||
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| invalidKeys := t.inactiveObservations(deadline) | ||
| for _, key := range invalidKeys { | ||
| t.cleanupTrackerAttribution(key) | ||
| } | ||
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| if t.shouldDelete(deadline) { | ||
| m.deleteTracker(userID) | ||
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| } | ||
| } | ||
| return nil | ||
| } | ||
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I think this doesn't need to be exported.