Self-healing of an application in a distributed architecture

1 . A method for providing self-healing of an application in a distributed architecture, comprising:

continuously updating, by a system manager microservice, state information of a plurality of microservices to a database;

determining, by a health check microservice, one or more down microservices from the plurality of microservices;

restarting, by an orchestration layer, the one or more down microservices;

generating, by the system manager microservice, updated states by performing an audit of state entries retrieved from the database based on a list of states obtained from a data store microservice to generate updated states for the plurality of microservices;

based on the audit of the state entries retrieved from the database, providing, by the system manager microservice, the updated states for the plurality of microservices to the database; and

resuming operation of the plurality of microservices based on the updated states for the plurality of microservices.

2 . The method of claim 1 , wherein the continuously updating, by the system manager microservice, the state information of the plurality of microservices to the database includes:

implementing an Open-Radio Access Network (O-RAN) node using the plurality of microservices providing network functions of the O-RAN node, the plurality of microservices including the system manager microservice for managing the plurality of microservices, the health check microservice, the data store microservice, and other microservices providing the network functions of the O-RAN node;

for state transitions by the other microservices, obtaining, by the system manager microservice, states of the other microservices; and

updating, by the system manager microservice, the states of the other microservices to the database at the state transitions.

3 . The method of claim 2 , wherein the implementing the O-RAN node using the plurality of microservices includes implementing a distributed unit node of the O-RAN node using at least one of a Radio Unit (RU) Manager (RUMgr) microservice, an FIC Manager (F1CMgr) microservice, a Timing (Timing) microservice, an FCAPS (FCAPS) microservice, a Baseband microservice, a Transport Manager (TransportMgr) and Internet Protocol Security (IPsec) Manger (IPSecMgr) microservice, or the data store microservice.

4 . The method of claim 2 , wherein the implementing the Open-Radio Access Network (O-RAN) node using the system manager microservice includes implementing a central system manager microservice for synchronizing the states for the plurality of microservices, communicating with and managing the plurality of microservices, and controlling cell activation call flow.

5 . The method of claim 1 , wherein the performing the audit of the state entries retrieved from the database based on the list of states obtained from the data store microservice includes:

based on the list of states obtained from the data store microservice, querying the plurality of microservices to obtain a current state of the plurality of microservices;

comparing a query response of the current state of the plurality of microservices to the state entries retrieved from the database; and

based on the comparing the query response of the current state of the plurality of microservices to the state entries retrieved from the database, generating updated states for the plurality of microservices.

6 . The method of claim 1 , wherein

the determining, by the health check microservice, the one or more down microservices from the plurality of microservices includes determining the system manager microservice is down; and

the restarting the one or more down microservices includes restarting the system manager microservice based on performing the audit of the state entries retrieved from the database.

7 . The method of claim 1 wherein:

the determining, by the health check microservice, the one or more down microservices from the plurality of microservices includes detecting, by the data store microservice, that two or more of the plurality of microservices are currently down, broadcasting, by the data store microservice, the list of states, wherein the list of states indicating the two or more of the plurality of microservices that are currently down, receiving, by the system manager microservice from the data store microservice, the list of states indicating the two or more of the plurality of microservices that are currently down, halting, by the system manager microservice, the plurality of microservices, and informing, by the system manager microservice, running microservices to stop operation, and

the restarting, by the orchestration layer, the one or more down microservices includes waiting, by the system manager microservice, for the two or more of the plurality of microservices that are currently down to come back online, and, once the two or more of the plurality of microservices in the list of states come back online, starting, by the system manager microservice, a cell initialization procedure to move a cell to an Active State.

8 . An Open-Radio Access Network (O-RAN) Node, comprising:

a memory storing computer-readable instructions; and

a processor connected to the memory, wherein the processor is configured to execute the computer-readable instructions to:

continuously update state information of a plurality of microservices to a database;

determine one or more down microservices from the plurality of microservices;

restart the one or more down microservices;

generate updated states by performing an audit of state entries retrieved from the database based on a list of states obtained from a data store microservice to generate updated states for the plurality of microservices;

based on the audit of the state entries retrieved from the database, provide the updated states for the plurality of microservices to the database; and

resume operation of the plurality of microservices based on the updated states for the plurality of microservices.

9 . The O-RAN Node of claim 8 , wherein the processor is further configured to continuously update the state information of the plurality of microservices to the database by implementing the plurality of microservices providing network functions, the plurality of microservices including a system manager microservice for managing the plurality of microservices, a health check microservice, the data store microservice, and other microservices providing the network functions, obtain for state transitions by the other microservices, states of the other microservices, and update the states of the other microservices to the database at the state transitions.

10 . The O-RAN Node of claim 9 , wherein the processor is further configured to implement the plurality of microservices by implementing a distributed unit node using at least one of a Radio Unit (RU) Manager (RUMgr) microservice, an FIC Manager (F1CMgr) microservice, a Timing (Timing) microservice, an FCAPS (FCAPS) microservice, a Baseband microservice, a Transport Manager (TransportMgr) and Internet Protocol Security (IPsec) Manger (IPSecMgr) microservice, or the data store microservice.

11 . The O-RAN Node of claim 9 , wherein the processor is further configured to implement the system manager microservice by implementing a central system manager microservice for synchronizing the states for the plurality of microservices, communicating with and managing the plurality of microservices, and controlling cell activation call flow.

12 . The O-RAN Node of claim 8 , wherein the processor is further configured to perform the audit of the state entries retrieved from the database based on the list of states obtained from the data store microservice by querying the plurality of microservices to obtain a current state of the plurality of microservices based on the list of states obtained from the data store microservice, comparing a query response of the current state of the plurality of microservices to the state entries retrieved from the database, and, based on the comparing the query response of the current state of the plurality of microservices to the state entries retrieved from the database, generating updated states for the plurality of microservices.

13 . The O-RAN Node of claim 8 , wherein the processor is further configured to determine the one or more down microservices from the plurality of microservices by determining a system manager microservice is down, and to restart the one or more down microservices by restarting the system manager microservice based on performing the audit of the state entries retrieved from the database.

14 . The O-RAN Node of claim 8 , wherein the processor is further configured to:

determine the one or more down microservices from the plurality of microservices by detecting that two or more of the plurality of microservices are currently down, broadcasting the list of states, wherein the list of states indicating the two or more of the plurality of microservices that are currently down, receiving, from the data store microservice, the list of states indicating the two or more of the plurality of microservices that are currently down, halting the plurality of microservices, and informing running microservices to stop operation, and

restart the one or more down microservices by waiting for the two or more of the plurality of microservices that are currently down to come back online, and, once the two or more of the plurality of microservices in the list of states come back online, starting a cell initialization procedure to move a cell to an Active State.

15 . A non-transitory computer-readable media having computer-readable instructions stored thereon, which when executed by a processor causes the processor to perform operations comprising:

continuously updating, by a system manager microservice, state information of a plurality of microservices to a database;

determining, by a health check microservice, one or more down microservices from the plurality of microservices;

restarting, by an orchestration layer, the one or more down microservices;

generating, by the system manager microservice, updated states by performing an audit of state entries retrieved from the database based on a list of states obtained from a data store microservice to generate updated states for the plurality of microservices;

based on the audit of the state entries retrieved from the database, providing, by the system manager microservice, the updated states for the plurality of microservices to the database; and

resuming operation of the plurality of microservices based on the updated states for the plurality of microservices.

16 . The non-transitory computer-readable media of claim 15 , wherein the continuously updating, by the system manager microservice, the state information of the plurality of microservices to the database includes:

implementing an Open-Radio Access Network (O-RAN) node using the plurality of microservices providing network functions of the O-RAN node, the plurality of microservices including the system manager microservice for managing the plurality of microservices, the health check microservice, the data store microservice, and other microservices providing the network functions of the O-RAN node;

for state transitions by the other microservices, obtaining, by the system manager microservice, states of the other microservices; and

updating, by the system manager microservice, the states of the other microservices to the database at the state transitions.

17 . The non-transitory computer-readable media of claim 16 , wherein the implementing the O-RAN node using the plurality of microservices further includes implementing a distributed unit node of the O-RAN node using at least one of a Radio Unit (RU) Manager (RUMgr) microservice, an F1C Manager (F1CMgr) microservice, a Timing (Timing) microservice, an FCAPS (FCAPS) microservice, a Baseband microservice, a Transport Manager (TransportMgr) and Internet Protocol Security (IPsec) Manger (IPSecMgr) microservice, or the data store microservice.

18 . The non-transitory computer-readable media of claim 15 , wherein the performing the audit of the state entries retrieved from the database based on the list of states obtained from the data store microservice includes:

based on the list of states obtained from the data store microservice, querying the plurality of microservices to obtain a current state of the plurality of microservices;

comparing a query response of the current state of the plurality of microservices to the state entries retrieved from the database; and

based on the comparing the query response of the current state of the plurality of microservices to the state entries retrieved from the database, generating updated states for the plurality of microservices.

19 . The non-transitory computer-readable media of claim 15 , wherein

the determining, by the health check microservice, the one or more down microservices from the plurality of microservices includes determining the system manager microservice is down; and

the restarting the one or more down microservices includes restarting the system manager microservice based on performing the audit of the state entries retrieved from the database.

20 . The non-transitory computer-readable media of claim 15 , wherein:

the determining, by the health check microservice, the one or more down microservices from the plurality of microservices includes detecting, by the data store microservice, that two or more of the plurality of microservices are currently down, broadcasting, by the data store microservice, the list of states, wherein the list of states indicating the two or more of the plurality of microservices that are currently down, receiving, by the system manager microservice from the data store microservice, the list of states indicating the two or more of the plurality of microservices that are currently down, halting, by the system manager microservice, the plurality of microservices, and informing, by the system manager microservice, running microservices to stop operation, and

the restarting, by the orchestration layer, the one or more down microservices includes waiting, by the system manager microservice, for the two or more of the plurality of microservices that are currently down to come back online, and, once the two or more of the plurality of microservices in the list of states come back online, starting, by the system manager microservice, a cell initialization procedure to move a cell to an Active State.