Prevention of residual data writes after non-graceful node failure in a cluster

A system for protecting data from a non-graceful node failure in a cluster of computing nodes, the system comprising:

• a storage system storing a plurality of storage volumes;
• a controller for a storage orchestrator executing on a controller node of the computing nodes;
• and
• a plurality of servers for the storage orchestrator executing on a plurality of the computing nodes, wherein the plurality of computing nodes is configured to execute one or more pods that access the storage system, wherein,
• the controller is configured to determine a node in the cluster has failed and mark the node as dirty;
• a server of the plurality of servers executing on the node is configured to send, to the controller, a request for mounting of a storage volume of the plurality of storage volumes while the node is marked as dirty,
• the controller is configured to reject the request and direct the server to erase a write buffer on the node, and
• the server is configured to erase the write buffer in response to direction from the controller.

A method comprising:

• executing a pod on a computing node in a cluster, wherein a container orchestration platform manages pod execution across the cluster;
• receiving an indication that a pod has failed due to the computing node being out of service;
• and
• after receiving the indication:
• reassigning a processing task for the pod to another pod on another computing node in the cluster;
• and
• rejecting a storage volume mounting request due to the processing task having been reassigned.