How can resource usage limits be set inside a container?

Resource usage limits within a container can be set using CPU and memory restrictions. In containerization systems like Docker and Kubernetes, this is done through configuration parameters.

For example, in Docker, you can set limits when running a container:

docker run --memory=512m --cpus=1.5 my-container

• --memory=512m limits memory usage to 512 megabytes.
• --cpus=1.5 limits CPU usage to 1.5 cores.

In Kubernetes, resources are specified in pod manifests using the resources.requests and resources.limits fields:

apiVersion: v1
kind: Pod
metadata:
  name: example-pod
spec:
  containers:
  - name: example-container
    image: my-image
    resources:
      requests:
        memory: "256Mi"
        cpu: "500m"
      limits:
        memory: "512Mi"
        cpu: "1"

• requests are guaranteed resources.
• limits are the maximum allowable resources.

Thus, you can control the resource consumption of a container to prevent host overload.