Lightweight rolling update technique for applications

A computer program product comprising:

• one or more computer-readable storage media;
• and
• program instructions stored on the one or more storage media to perform operations comprising:
• determining that a monitored item of a pod has been updated based on monitoring a pod object associated with the pod, wherein the pod includes a container, and wherein the container includes an application;
• retrieving a policy for the pod, wherein the policy identifies the container and specifies one or more actions to be performed on the container;
• performing the one or more actions on the container;
• and
• updating annotations to the pod object to indicate that the one or more actions have been completed.

A computer system comprising:

• a processor set;
• one or more computer-readable storage media;
• and
• program instructions stored on the one or more storage media to cause the processor set to perform operations comprising:
• determining that a monitored item of a pod has been updated based on monitoring a pod object associated with the pod, wherein the pod includes a container, and wherein the container includes an application;
• retrieving a policy for the pod, wherein the policy identifies the container and specifies one or more actions to be performed on the container;
• performing the one or more actions on the container;
• and
• updating annotations to the pod object to indicate that the one or more actions have been completed.