https://www.elastic.co/docs/deploy-manage/tools/cross-cluster-replication/_failback_when_clustera_comes_back
Uni-directional recovery: failback when clusterA comes back | Elastic Docs
When clusterA comes back, clusterB becomes the new leader and clusterA becomes the follower. Set up remote cluster clusterB on clusterA.Existing data...
unidirectionalrecoverycomesback