Method and apparatus for secure and verifiable composite service execution and fault management on blockchain

A network device configured to identify an originating point of failure in a composite service executed in a cloud computing environment, the network device comprising:

• a set of one or more processors;
• and
• a non-transitory machine-readable storage medium having stored therein a service composition engine component, which when executed by the set of one or more processors, causes the network device to:
• cause the composite service to be executed in the cloud computing environment, wherein the execution of the composite service includes execution of a plurality of atomic services in a predefined ordered sequence, wherein each of the atomic services is associated with a private key and a corresponding public key, wherein for each atomic service that is executed as part of the execution of the composite service, an execution trace for that atomic service is stored in a blockchain to form an ordered sequence of execution traces, wherein the execution trace for a given atomic service indicates an execution input of that atomic service and an execution output of that atomic service and is signed using the private key associated with that atomic service,
• determine that a failure occurred during execution of the composite service, and
• responsive to determining that the failure occurred, analyze one or more of the ordered sequence of execution traces in reverse order to determine which of the plurality of atomic services originated the failure, wherein each execution trace that is analyzed is authenticated using the public key that corresponds to the private key associated with the atomic service that generated that execution trace.

A non-transitory machine-readable medium having computer code stored therein, which when executed by a set of one or more processors of one or more network devices, causes the one or more network devices to perform operations for identifying an originating point of failure in a composite service executed in a cloud computing environment, the operations comprising:

• causing the composite service to be executed in the cloud computing environment, wherein the execution of the composite service includes execution of a plurality of atomic services in a predefined ordered sequence, wherein each of the atomic services is associated with a private key and a corresponding public key, wherein for each atomic service that is executed as part of the execution of the composite service, an execution trace for that atomic service is stored in a blockchain to form an ordered sequence of execution traces, wherein the execution trace for a given atomic service indicates an execution input of that atomic service and an execution output of that atomic service and is signed using the private key associated with that atomic service;
• determining that a failure occurred during execution of the composite service;
• and
• responsive to determining that the failure occurred, analyzing one or more of the ordered sequence of execution traces in reverse order to determine which of the plurality of atomic services originated the failure, wherein each execution trace that is analyzed is authenticated using the public key that corresponds to the private key associated with the atomic service that generated that execution trace.