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switched to polling to allow metrics collection
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "sync" | ||
| "time" | ||
|
|
||
| tz "github.com/ecadlabs/gotez/v2" | ||
| "github.com/ecadlabs/gotez/v2/client" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| log "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| type BootstrapPollerConfig struct { | ||
| Client Client | ||
| ChainID *tz.ChainID | ||
| Timeout time.Duration | ||
| Interval time.Duration | ||
| Reg prometheus.Registerer | ||
| } | ||
|
|
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| type BootstrapPoller struct { | ||
| cfg BootstrapPollerConfig | ||
|
|
||
| mtx sync.RWMutex | ||
| status client.BootstrappedResponse | ||
|
|
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| cancel context.CancelFunc | ||
| done chan struct{} | ||
| metric prometheus.Gauge | ||
| } | ||
|
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| func (c *BootstrapPollerConfig) New() *BootstrapPoller { | ||
| b := &BootstrapPoller{ | ||
| cfg: *c, | ||
| metric: prometheus.NewGauge(prometheus.GaugeOpts{ | ||
| Namespace: "tezos", | ||
| Subsystem: "node", | ||
| Name: "bootstrapped", | ||
| Help: "Returns 1 if the node has synchronized its chain with a few peers.", | ||
| }), | ||
| } | ||
| if c.Reg != nil { | ||
| c.Reg.MustRegister(b.metric) | ||
| } | ||
| return b | ||
| } | ||
|
|
||
| func (b *BootstrapPoller) Start() { | ||
| ctx, cancel := context.WithCancel(context.Background()) | ||
| b.cancel = cancel | ||
| b.done = make(chan struct{}) | ||
| go b.loop(ctx) | ||
| } | ||
|
|
||
| func (b *BootstrapPoller) Stop(ctx context.Context) error { | ||
| b.cancel() | ||
| select { | ||
| case <-b.done: | ||
| return nil | ||
| case <-ctx.Done(): | ||
| return ctx.Err() | ||
| } | ||
| } | ||
|
|
||
| func (b *BootstrapPoller) Status() client.BootstrappedResponse { | ||
| b.mtx.RLock() | ||
| defer b.mtx.RUnlock() | ||
| return b.status | ||
| } | ||
|
|
||
| func (b *BootstrapPoller) loop(ctx context.Context) { | ||
| t := time.NewTicker(b.cfg.Interval) | ||
| defer func() { | ||
| t.Stop() | ||
| close(b.done) | ||
| }() | ||
| for { | ||
| c, cancel := context.WithTimeout(ctx, b.cfg.Timeout) | ||
| resp, err := b.cfg.Client.IsBootstrapped(c, b.cfg.ChainID) | ||
| cancel() | ||
| if err != nil { | ||
| if errors.Is(err, context.Canceled) { | ||
| return | ||
| } | ||
| log.WithField("chain_id", b.cfg.ChainID).Warn(err) | ||
| } else { | ||
| b.mtx.Lock() | ||
| b.status = *resp | ||
| b.mtx.Unlock() | ||
| v := 0.0 | ||
| if resp.SyncState == client.SyncStateSynced && resp.Bootstrapped { | ||
| v = 1 | ||
| } | ||
| b.metric.Set(v) | ||
| } | ||
|
|
||
| select { | ||
| case <-t.C: | ||
| case <-ctx.Done(): | ||
| return | ||
| } | ||
| } | ||
| } |
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