Automated transparent distribution of updates to server computer systems in a fleet

A computer-implemented method, comprising:

• obtaining, at a deployment subsystem, an update script to update software executed by a server computer system, the update script indicating a plurality of operations that, as a result of being executed successfully, causes the server computer system to update the software, the update script further indicating a plurality of conditions, at least one condition indicating that a volume served by the server computer system is to be available on another server computer system prior to updating the software;
• determining, by the deployment subsystem, a set of server computer systems to provide the update script;
• providing the update script to the set of server computer systems;
• the update script causing the server computer system, where the server computer system is a member of the set of server computer systems, to:
• generate a plurality of checks for the plurality of conditions, where at least one check of the plurality of checks indicates that the at least one condition is not satisfied;
• and
• as a result of the at least one check indicating that the at least one condition is not satisfied, cause the server computer system to transmit an exception and perform an operation of the plurality of operations to satisfy the at least one condition;
• in response to the exception, storing information associated with the server computer system in a wait list indicating that the server computer system has failed at least one operation and that the server computer system will rerun the update script;
• and
• determining the server computer system has updated the software based at least in part on the server computer system re-executing the update script and the plurality of checks indicating that the plurality of conditions is satisfied.

A system, comprising:

• one or more processors;
• and
• memory that stores computer-executable instructions that, as a result of being executed by the one or more processors, cause the system to:
• determine a server computer system of a set of server computer systems to provide an update, the update specifying a set of operations that causes the server computer system to update software associated with the server computer system and a plurality of conditions, at least one condition of the plurality of conditions indicating that a volume served by the server computer system is to be available on at least one other server computer system prior to executing the update;
• provide the update to the server computer system operated by a computing resource service provider, the update causing the server computer system to:
• perform a plurality of checks of the plurality of conditions to determine whether conditions of the plurality of conditions are satisfied, at least one check of the plurality of checks indicating that the at least one condition is not satisfied;
• and
• as a result of the at least one check indicating that the at least one condition is not satisfied, return an exception and perform at least one operation of the set of operations to satisfy the at least one condition;
• in response to the exception, cause information associated with the server computer system to be stored in a wait list indicating that the server computer system is awaiting execution of the update once the at least one condition is satisfied;
• and
• in response to the at least one condition being satisfied, cause the server computer system to execute the update.