2 files changed, 17 insertions, 0 deletions

diff --git a/plugin/erratic/README.md b/plugin/erratic/README.md
index 62625c1d0..a731bed0f 100644
--- a/plugin/erratic/README.md
+++ b/plugin/erratic/README.md
@@ -37,6 +37,10 @@ In case of a zone transfer and truncate the final SOA record *isn't* added to th
 
 This plugin implements dynamic health checking. For every dropped query it turns unhealthy.
 
+## Ready
+
+This plugin reports readiness to the ready plugin.
+
 ## Examples
 
 ~~~ corefile
diff --git a/plugin/erratic/ready.go b/plugin/erratic/ready.go
new file mode 100644
index 000000000..d5f18a6d5
--- /dev/null
+++ b/plugin/erratic/ready.go
@@ -0,0 +1,13 @@
+package erratic
+
+import "sync/atomic"
+
+// Ready returns true if the number of received queries is in the range [3, 5). All other values return false.
+// To aid in testing we want to this flip between ready and not ready.
+func (e *Erratic) Ready() bool {
+	q := atomic.LoadUint64(&e.q)
+	if q >= 3 && q < 5 {
+		return true
+	}
+	return false
+}