Hot deployment in a distributed cluster system

A system comprising:

• a memory;
• and
• a processing device a distributed cluster system, the processing device communicably coupled to the memory, the processing device to:
• execute a functionality of an instance of an application image in a container, the image associated with source code and an application framework of an application;
• receive a modification to the source code utilized in the instance;
• apply the modification to the source code during runtime of the instance in the container;
• and
• restart the application image instance without including the modification to the source code.

A non-transitory machine-readable storage medium including instructions that, when accessed by a processing device in a distributed cluster system, cause the processing device to:

• execute, by the processing device, an instance of an application image in a container, the image associated with source code and an application framework of an application;
• receive, by the processing device, a request to modify the source code during runtime of the instance in the container, wherein the container comprises a supervisor process;
• enable, by the processing device, the application framework utilized in the instance to identify the modification to the source code utilized in the instance;
• restart, by the processing device via the supervisor process, the application framework to apply the identified modification to the source code.