Kubernetes Resource Report

This version only supports node costs for AWS EC2 (all regions, On Demand, Linux) and GKE/GCP machine types (all regions, On Demand, without sustained discount)

Script to generate a HTML report of CPU/memory requests vs. usage (collected via Metrics API/Heapster) for one or more Kubernetes clusters.

Want to see how the report looks? Check out the sample HTML report and the demo deployment!

What the script does:

• Discover all clusters (either via ~/.kube/config, via in-cluster serviceAccount, or via custom Cluster Registry REST endpoint)
• Collect all cluster nodes and their estimated costs (AWS and GCP only)
• Collect all pods and use the application or app label as application ID
• Get additional information for each app from the application registry (team_id and active field)
• Group and aggregate resource usage and slack costs per cluster, team and application
• Allow custom links to existing systems (e.g. link to a monitoring dashboard for each cluster)

Usage

The usage requires Pipenv (see below for alternative with Docker):

$ pipenv install && pipenv shell
$ mkdir output
$ python3 -m kube_resource_report output/ # uses clusters defined in ~/.kube/config
$ OAUTH2_ACCESS_TOKENS=read-only=mytok python3 -m kube_resource_report --cluster-registry=https://cluster-registry.example.org output/ # discover clusters via registry
$ OAUTH2_ACCESS_TOKENS=read-only=mytok python3 -m kube_resource_report --cluster-registry=https://cluster-registry.example.org output/ --application-registry=https://app-registry.example.org # get team information

The output will be HTML files plus multiple tab-separated files:

output/index.html

Main HTML overview page, links to all other HTML pages.

output/clusters.tsv

List of cluster summaries with number of nodes and overall costs.

output/slack.tsv

List of potential savings (CPU/memory slack).

output/ingresses.tsv

List of ingress host rules (informational).

output/pods.tsv

List of all pods and their CPU/memory requests and usages.

Deploying to Minikube

This will deploy a single pod with kube-resource-report and nginx (to serve the static HTML):

$ minikube start
$ kubectl apply -f deploy/
$ kubectl port-forward service/kube-resource-report 8080:80

Now open http://localhost:8080/ in your browser.

Deploy using Helm Chart

IMPORTANT: Helm is not used by the maintainer of kube-resource-report - the Helm Chart was contributed by Eriks Zelenka and is not officially tested or supported! This will deploy a single pod with kube-resource-report and nginx (to serve the static HTML):

$ helm upgrade --install kube-resource-report chart/kube-resource-report
$ helm status kube-resource-report

Use helm status command to verify deployment and obtain instructions to access kube-resource-report.

Running as Docker container

$ kubectl proxy & # start proxy to your cluster (e.g. Minikube)
$ # run kube-resource-report and generate static HTML to ./output
$ docker run --rm -it --user=$(id -u) --net=host -v $(pwd)/output:/output hjacobs/kube-resource-report:latest /output

For macOS:

$ kubectl proxy --accept-hosts '.*' & # start proxy to your cluster (e.g. Minikube)
$ # run kube-resource-report and generate static HTML to ./output
$ docker run --rm -it -e CLUSTERS=http://docker.for.mac.localhost:8001 --user=$(id -u) -v $(pwd)/output:/output hjacobs/kube-resource-report:latest /output

Application Registry

The optional application registry can provide information per application ID, it needs to have a REST API like:

$ curl -H 'Authorization: Bearer <mytok>' https://app-registry.example.org/apps/<application-id>
{
"team_id": "<team-id>",
"active": true
}

See the application-registry.py script in the sample-report folder for an example implementation.

Custom Links

The generated report can be enhanced with custom links to existing systems, e.g. to link to monitoring dashboards or similar. This currently works for clusters, teams, and applications. Custom links can be specified by providing the --links-file option which must point to a YAML file with the links per entity. Example file:

cluster:
- href: "https://mymonitoringsystem.example.org/dashboard?cluster={name}"
  title: "Grafana dashboard for cluster {name}"
  icon: chart-area
application:
- href: "https://mymonitoringsystem.example.org/dashboard?application={id}"
  title: "Grafana dashboard for application {id}"
  icon: chart-area
- href: "https://apps.mycorp.example.org/apps/{id}"
  title: "Go to detail page of application {id}"
  icon: search
team:
- href: "https://people.mycorp.example.org/search?q=team:{id}"
  title: "Search team {id} on people.mycorp"
  icon: search
ingress:
- href: "https://kube-web-view.mycorp.example.org/clusters/{cluster}/namespaces/{namespace}/ingresses/{name}"
  title: "View ingress {name} in Kubernetes Web View"
  icon: external-link-alt
node:
- href: "https://kube-web-view.mycorp.example.org/clusters/{cluster}/nodes/{name}"
  title: "View node {name} in Kubernetes Web View"
  icon: external-link-alt
namespace:
- href: "https://kube-web-view.mycorp.example.org/clusters/{cluster}/namespaces/{name}"
  title: "View namespace {name} in Kubernetes Web View"
  icon: external-link-alt
pod:
- href: "https://kube-web-view.mycorp.example.org/clusters/{cluster}/namespaces/{namespace}/pods/{name}"
  title: "View pod {name} in Kubernetes Web View"
  icon: external-link-alt

For available icon names, see the Font Awesome gallery with free icons.

Settings

You can run docker run --rm hjacobs/kube-resource-report:latest --help to find out information.

Besides this, you can also pass environment variables:

• NODE_LABEL_SPOT (default: "aws.amazon.com/spot")
• NODE_LABEL_ROLE (default: "kubernetes.io/role")
• NODE_LABEL_REGION (default: "failure-domain.beta.kubernetes.io/region")
• NODE_LABEL_INSTANCE_TYPE (default: "beta.kubernetes.io/instance-type")
• OBJECT_LABEL_APPLICATION (default: "application,app,app.kubernetes.io/name")
• OBJECT_LABEL_COMPONENT (default: "component,app.kubernetes.io/component")