What is the probability that after restarting the cluster, the container will start on the same node again?

The probability that a container will start on the same node after a cluster restart depends on the orchestration system used and the configurations. For example, in Kubernetes, there is no default guarantee that a Pod will start on the same node, as the scheduler chooses a node based on current load and available resources.

If it is necessary to pin a container to a specific node, mechanisms such as node affinity or nodeSelector are used, which specify preferences or strict constraints for placement.

Therefore, without special configurations, the probability of starting on the same node is approximately equal to the share of resources of that node in the total pool, but this is usually not guaranteed.