Implementing Resource Control in Docker

Implementing resource control in Docker, including resource reservation and CPU limiting, is essential to ensure that our containers run efficiently and don’t monopolize system resources. Resource control in Docker involves setting memory limits for containers to approximate reservation and restricting CPU usage using the --cpus flag. In Docker Compose, resource constraints like memory and CPU limits can be specified in service definitions, with a base docker-compose.yml file and an override file.

Resource reservation

Docker also allows us to reserve a minimum memory for a container using the --memory-reservation flag. This ensures that the container gets at least the specified amount of memory. We pull an Nginx image for this purpose with the following command: