Cloud application update with reduced downtime

摘要

An updater platform may create a listening delegator process, associated with a listener file descriptor, within a deployment (without implementing an accept protocol). The platform may execute an original instance of an application process within the deployment and intercept a socket creation call from the original instance of the application process and replace it with the listener file descriptor. As a result, incoming connection requests are received by the listening delegator process and forwarded to the original instance of the application process. The platform may then determine that a configuration update is to be made to the application process and start an additional instance of the application process, with the updated configuration, within the deployment, such that incoming connection requests are received by the listening delegator process and forwarded to the additional instance of the application process. The platform may then switch off the original instance of the application process.