Closing the ReadinessProbe discussion with GET call using --consisten…

…cy=linearizable. (#13)

docs/concepts/bootstrap.md

@@ -48,7 +48,7 @@ Initiliasation loop exits only when the status returned from `etcd-backup-sideca
 
 Start phase mainly comprises of two steps:
 
-1. Set up a readiness probe at `/readyz` where anyone can query to verify if the etcd application is running.
+1. Set up a readiness probe at `/readyz` where anyone can query to verify if the etcd application(single node cluster or multi-node cluster) is ready to accept client traffic.
 
 2. Start an embedded etcd using the fetched etcd configuration.
 

internal/app/readycheck.go

@@ -85,7 +85,7 @@ func (a *Application) queryAndUpdateEtcdReadiness() {
 func (a *Application) isEtcdReady() bool {
 	etcdConnCtx, cancelFunc := context.WithTimeout(a.ctx, etcdGetTimeout)
 	defer cancelFunc()
-	_, err := a.etcdClient.Get(etcdConnCtx, "foo" /*, clientv3.WithSerializable()*/)
+	_, err := a.etcdClient.Get(etcdConnCtx, "foo")
 	if err != nil {
 		a.logger.Error("failed to retrieve from etcd db", zap.Error(err))
 	}