ResourceRequests

Calculates the total resource requirements (just CPU and memory for now) of a set of Kubernetes YAML files.

Why?

When releasing a project with many Pod, Deployment and Job objects, it is useful to provide the minimum amount of resource needed for it to be scheduled by Kubernetes.

How?

The tools go recursively though the provided path and looks at YAML files and sums the resource requests:

• In a Deployment, spec.template.spec.containers[*].resources.requests is multiplied by spec.replicas
• In a Job, spec.template.spec.containers[*].resources.requests is multiplied by `spec.parallelism

Install

go get -u github.com/JRBANCEL/ResourceRequests/cmd/requests

Example

Let's compute the resource required by Knative:

pushd $(mktemp -d)
git clone --depth 1 -b master https://github.com/knative/serving.git
requests serving/config/core 
popd

returns

-> serving/config/core/deployments/activator.yaml
        Kind: Deployment, Object: knative-serving/activator CPU: 300m, Memory: 63M
-> serving/config/core/deployments/autoscaler.yaml
        Kind: Deployment, Object: knative-serving/autoscaler CPU: 30m, Memory: 42M
-> serving/config/core/deployments/controller.yaml
        Kind: Deployment, Object: knative-serving/controller CPU: 100m, Memory: 105M
-> serving/config/core/deployments/webhook.yaml
        Kind: Deployment, Object: knative-serving/webhook CPU: 100m, Memory: 105M
---
Total - CPU: 530m, Memory: 315M