forked from lightninglabs/lndmon
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request lightninglabs#108 from lightninglabs/startup-time-…
…monitoring collectors: add startup time metrics
- Loading branch information
Showing
5 changed files
with
221 additions
and
74 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| package collectors | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/lightninglabs/lndclient" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
|
||
| // StateCollector is a collector that keeps track of LND's state. | ||
| type StateCollector struct { | ||
| lnd *lndclient.LndServices | ||
|
|
||
| // timeToStartDesc is a gauge to track time from unlocked to started of LND. | ||
| timeToStartDesc *prometheus.Desc | ||
|
|
||
| // timeToUnlockDesc is a gauge to track the time to unlock of LND. | ||
| timeToUnlockDesc *prometheus.Desc | ||
|
|
||
| // programStartTime records a best-effort timestamp of when lndmon was started. | ||
| programStartTime time.Time | ||
|
|
||
| // unlockTime records a best-effort timestamp of when LND was unlocked. | ||
| unlockTime time.Time | ||
|
|
||
| // endTime records when LND makes a transition from UNLOCKED to | ||
| // SERVER_ACTIVE. | ||
| // If lndmon starts after LND has already reached SERVER_ACTIVE, no | ||
| // startup time metric will be emitted. | ||
| endTime time.Time | ||
|
|
||
| // mutex is a lock for preventing concurrent writes to unlockTime or | ||
| // endTime. | ||
| mutex sync.RWMutex | ||
|
|
||
| // errChan is a channel that we send any errors that we encounter into. | ||
| // This channel should be buffered so that it does not block sends. | ||
| errChan chan<- error | ||
| } | ||
|
|
||
| // NewStateCollector returns a new instance of the StateCollector. | ||
| func NewStateCollector(lnd *lndclient.LndServices, | ||
| errChan chan<- error, programStartTime time.Time) *StateCollector { | ||
|
|
||
| sc := &StateCollector{ | ||
| lnd: lnd, | ||
| timeToStartDesc: prometheus.NewDesc( | ||
| "lnd_time_to_start_millisecs", | ||
| "time to start in milliseconds", | ||
| nil, nil, | ||
| ), | ||
| timeToUnlockDesc: prometheus.NewDesc( | ||
| "lnd_time_to_unlock_millisecs", | ||
| "time to unlocked in milliseconds", | ||
| nil, nil, | ||
| ), | ||
| programStartTime: programStartTime, | ||
| unlockTime: time.Now(), | ||
| errChan: errChan, | ||
| } | ||
|
|
||
| go sc.monitorStateChanges() | ||
| return sc | ||
| } | ||
|
|
||
| // monitorStateChanges checks the state every second to catch fast transitions. | ||
| func (s *StateCollector) monitorStateChanges() { | ||
| var serverActiveReached bool | ||
|
|
||
| stateUpdates, errChan, err := s.lnd.State.SubscribeState(context.Background()) | ||
| if err != nil { | ||
| s.errChan <- fmt.Errorf("StateCollector SubscribeState failed with: %v", err) | ||
| return | ||
| } | ||
|
|
||
| for { | ||
| select { | ||
| case state := <-stateUpdates: | ||
| s.mutex.Lock() | ||
| if state == lndclient.WalletStateServerActive && !s.unlockTime.IsZero() { | ||
| s.endTime = time.Now() | ||
| serverActiveReached = true | ||
| } | ||
| s.mutex.Unlock() | ||
|
|
||
| if serverActiveReached { | ||
| return | ||
| } | ||
|
|
||
| case err := <-errChan: | ||
| s.errChan <- fmt.Errorf("StateCollector state update failed with: %v", err) | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Describe sends the super-set of all possible descriptors of metrics | ||
| // collected by this Collector to the provided channel and returns once the | ||
| // last descriptor has been sent. | ||
| // | ||
| // NOTE: Part of the prometheus.Collector interface. | ||
| func (s *StateCollector) Describe(ch chan<- *prometheus.Desc) { | ||
| ch <- s.timeToStartDesc | ||
| ch <- s.timeToUnlockDesc | ||
| } | ||
|
|
||
| // Collect is called by the Prometheus registry when collecting metrics. | ||
| // | ||
| // NOTE: Part of the prometheus.Collector interface. | ||
| func (s *StateCollector) Collect(ch chan<- prometheus.Metric) { | ||
| // Lock for read | ||
| s.mutex.RLock() | ||
| defer s.mutex.RUnlock() | ||
|
|
||
| // We have set unlockTime and endTime. | ||
| // Calculate the differences and emit a metric. | ||
| if !s.unlockTime.IsZero() && !s.endTime.IsZero() { | ||
| timeToUnlockInMSecs := s.unlockTime.Sub(s.programStartTime).Milliseconds() | ||
| timeToStartInMSecs := s.endTime.Sub(s.unlockTime).Milliseconds() | ||
| ch <- prometheus.MustNewConstMetric( | ||
| s.timeToStartDesc, prometheus.GaugeValue, float64(timeToStartInMSecs), | ||
| ) | ||
|
|
||
| ch <- prometheus.MustNewConstMetric( | ||
| s.timeToUnlockDesc, prometheus.GaugeValue, float64(timeToUnlockInMSecs), | ||
| ) | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.