Re-aligning data replication configuration of primary and secondary data serving entities of a cross-site storage solution after a failover event

A distributed storage system (DSS) of a high-availability (HA) storage solution, the DSS comprising:

• a processing resource;
• and
• a non-transitory computer-readable media, coupled to the one or more processing resources, having stored therein instructions that when executed by the processing resource cause the DSS to:
• maintain a local configuration database including configuration information indicative of a direction of data replication for a dataset of a local consistency group (CG) that is mirrored between the local CG and a remote CG, wherein the local CG includes a plurality of volumes of the DSS and the remote CG includes a corresponding plurality of volumes of a remote DSS of the HA storage solution that is operable at a different site than the DSS;
• responsive to a failover that has caused (i) the DSS to be placed into a primary role for serving input/output (I/O) operations relating to the mirrored dataset and (ii) the remote DSS to be placed into a secondary role for serving the I/O operations:
• cause the remote DSS, with atomicity on a remote configuration database, to:
• delete an existing source configuration persisted within the remote configuration database that identifies the remote cluster as a source of data replication;
• and
• persist a new destination configuration within the remote configuration database that identifies the remote cluster as a destination of the data replication;
• with atomicity on the local configuration database:
• delete an existing destination configuration persisted within the local configuration database that identifies the local cluster as the destination;
• and
• persist a new source configuration within the local configuration database that identifies the local cluster as the source.

A non-transitory computer-readable storage medium embodying a set of instructions, which when executed by a processing resource of a local cluster of a high-availability (HA) storage solution operable at a first site, cause the local cluster to:

• maintain a local configuration database including configuration information indicative of a direction of data replication for a dataset of a local consistency group (CG) that is mirrored between the local CG and a remote CG, wherein the local CG includes a plurality of volumes of the local cluster and the remote CG includes a corresponding plurality of volumes of a remote cluster of the HA storage solution that is operable at a second site;
• responsive to a failover that has caused (i) the local cluster to be placed into a primary role for serving input/output (I/O) operations relating to the mirrored dataset and (ii) the remote cluster to be placed into a secondary role for serving the I/O operations:
• cause the remote cluster, with atomicity on a remote configuration database, to:
• delete an existing source configuration persisted within the remote configuration database that identifies the remote cluster as a source of data replication;
• and
• persist a new destination configuration within the remote configuration database that identifies the remote cluster as a destination of the data replication;
• with atomicity on the local configuration database:
• delete an existing destination configuration persisted within the local configuration database that identifies the local cluster as the destination;
• and
• persist a new source configuration within the local configuration database that identifies the local cluster as the source.