Resource quotas per namespace in Kubernetes - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a Resource Quota in Kubernetes?

A Resource Quota is a limit set on the amount of compute resources (like CPU, memory) or objects (like pods, services) that can be used in a Kubernetes namespace. It helps control resource usage and prevent one team or app from using too much.

beginner

Why use Resource Quotas per namespace?

Resource Quotas ensure fair resource sharing among teams or projects by limiting how much CPU, memory, or other resources each namespace can consume. This avoids resource exhaustion and keeps the cluster stable.

beginner

Which Kubernetes object defines Resource Quotas?

The ResourceQuota object defines limits on resources in a namespace. It is created with a YAML file specifying limits like cpu, memory, pods, and services.

intermediate

What happens if a namespace exceeds its Resource Quota?

Kubernetes will reject new resource creation requests (like new pods) that exceed the quota. Existing resources keep running, but no new ones can be added until usage is below the quota.

beginner

How to check current Resource Quota usage in a namespace?

Use the command kubectl get resourcequota -n <namespace> to see quota limits and current usage in that namespace.

What does a Resource Quota limit in Kubernetes?

A The number of nodes in the cluster

B The amount of resources a namespace can use

C The version of Kubernetes running

D The number of users accessing the cluster

Resource Quotas limit resource usage like CPU, memory, and object counts within a namespace.

Which command shows Resource Quotas in a namespace?

A kubectl get pods

B kubectl describe nodes

C kubectl get resourcequota -n namespace

D kubectl get namespaces

The command 'kubectl get resourcequota -n namespace' lists quotas and usage in that namespace.

What happens if you try to create a pod exceeding the Resource Quota?

A The cluster automatically adds more resources

B The pod is created but marked as pending

C The pod is created and quota is ignored

D The pod creation is rejected

Kubernetes rejects creation of resources that exceed the quota limits.

Resource Quotas are applied at which Kubernetes scope?

A Namespace

B Cluster-wide

C Node level

D Pod level

Resource Quotas limit resource usage within a specific namespace.

Which resource can NOT be limited by a Resource Quota?

A Number of nodes

B Number of pods

C Memory usage

D CPU usage

Resource Quotas do not limit cluster nodes; they limit resources inside namespaces.

Explain what a Resource Quota is and why it is important in Kubernetes namespaces.

Think about how to share resources fairly among teams.

Describe how to create and check a Resource Quota in a Kubernetes namespace.

Focus on commands and YAML structure.