VOL-4154: Changes to techprofile module for etcd storage improvements.
- using protobuf definitions of techprofile template and instance
- store smaller footprint resource instance on the kv store
- store techprofile instance in cache
- reconcile techprofile instance from resource instance on adapter restart
- retry etcd get/put/delete on failure
- remove dealing of onu-gem-info data from PONResourceManager module
as adapter has to deal with this.
Change-Id: I741181e3f0dc5c4a419ffbed577eb4d21b73c4d6
diff --git a/pkg/db/kvstore/kvutils.go b/pkg/db/kvstore/kvutils.go
index 70bd977..946dbf2 100644
--- a/pkg/db/kvstore/kvutils.go
+++ b/pkg/db/kvstore/kvutils.go
@@ -17,7 +17,18 @@
import (
"bytes"
+ "context"
"fmt"
+ "math"
+ "math/rand"
+ "time"
+)
+
+const (
+ minRetryInterval = 100
+ maxRetryInterval = 5000
+ incrementalFactor = 1.2
+ jitter = 0.2
)
// ToString converts an interface value to a string. The interface should either be of
@@ -56,3 +67,24 @@
}
return val1 == val2
}
+
+// backoff waits an amount of time that is proportional to the attempt value. The wait time in a range of
+// minRetryInterval and maxRetryInterval.
+func backoff(ctx context.Context, attempt int) error {
+ if attempt == 0 {
+ return nil
+ }
+ backoff := int(minRetryInterval + incrementalFactor*math.Exp(float64(attempt)))
+ backoff *= 1 + int(jitter*(rand.Float64()*2-1))
+ if backoff > maxRetryInterval {
+ backoff = maxRetryInterval
+ }
+ ticker := time.NewTicker(time.Duration(backoff) * time.Millisecond)
+ defer ticker.Stop()
+ select {
+ case <-ctx.Done():
+ return ctx.Err()
+ case <-ticker.C:
+ }
+ return nil
+}