How can resources (CPU and memory) of containers be dynamically updated during their operation?

Dynamic resource updates (CPU and memory) for containers during their execution depend on the containerization platform used.

In Kubernetes, for example, you can change container resources by updating the Deployment or Pod manifest with new resources.requests and resources.limits values. After applying the changes, Kubernetes will restart the pod with the new resources.

Example of resource modification in the manifest:

resources:
  requests:
    memory: "512Mi"
    cpu: "500m"
  limits:
    memory: "1Gi"
    cpu: "1"

For Docker containers run directly, on-the-fly resource modification is limited. You can use the docker update command to change CPU and memory limits:

docker update --cpus=1.5 --memory=512m <container_id>

However, not all parameters can be changed dynamically, and often a restart of the container with new settings is required.

Overall, dynamic resource modification is possible but depends on the platform and orchestration settings.