starlingx/metrics-server-armada-app
Code Issues Proposed changes
512747aec4
metrics-server-armada-app/readme.md
Rafael Jardim 22948b65b4 Add a sample NodeJs Metric Server client 
The sample app is a NodeJs app that requests the metrics every second
and prints that in the console. In the deployment is created
a service account, roles and role binding to allows this application
communicate with the api, this token is stored by default
on `/var/run/secrets/kubernetes.io/serviceaccount/token`,
the application is reading that token and doing the requests
on the endpoint `/apis/metrics.k8s.io/v1beta1/pods` that returns
all pod metrics and log it on console.

Story: 2008457
Task: 41954

Change-Id: Ifd56e6e6ef862515d96d6ca22c2146e382bba78c
Signed-off-by: Rafael Jardim <rafaeljordao.jardim@windriver.com>
2021-03-03 13:51:31 -03:00

3.0 KiB
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Metrics Server Armada App

This Armada App is responsible to deliver the metrics server inside the ISO.

Metrics Server is a scalable, efficient source of container resource metrics for Kubernetes built-in autoscaling pipelines.

Structure

metrics-server-armada-app
├── centos_build_layer.cfg
├── centos_iso_image.inc
├── centos_pkg_dirs
├── centos_pkg_dirs_containers
├── centos_stable_docker_images.inc
├── readme.md
├── requirements.txt
├── sample-app
│   ├── centos
│   │   ├── docker
│   │   │   ├── Dockerfile
│   │   │   └── src
│   │   │       ├── package.json
│   │   │       └── sample-application.js
│   │   └── sample-app.stable_docker_image
│   └── readme.md
├── stx-metrics-server-helm
│   ├── centos
│   │   ├── build_srpm.data
│   │   └── stx-metrics-server-helm.spec
│   └── stx-metrics-server-helm
│       ├── files
│       │   ├── index.yaml
│       │   ├── metadata.yaml
│       │   └── repositories.yaml
│       ├── helm-charts
│       │   ├── Makefile
│       │   └── metrics-server
│       │       ├── Chart.yaml
│       │       ├── templates
│       │       │   ├── apiservice.yaml
│       │       │   ├── clusterrole-aggregated-reader.yaml
│       │       │   ├── clusterrolebinding-auth-delegator.yaml
│       │       │   ├── clusterrolebinding.yaml
│       │       │   ├── clusterrole.yaml
│       │       │   ├── deployment.yaml
│       │       │   ├── pdb.yaml
│       │       │   ├── psp.yaml
│       │       │   ├── rolebinding.yaml
│       │       │   ├── serviceaccount.yaml
│       │       │   └── service.yaml
│       │       └── values.yaml
│       └── manifests
│           └── metrics-server_manifest.yaml
├── test-requirements.txt
└── tox.ini

Important files

  • metrics-server_manifest.yaml - Armada Manifest
  • helm-charts - Metrics Server helm charts
  • stx-metrics-server-helm.spec - Steps to generate
  • centos_iso_image.inc - It inserts the rpm inside the ISO
  • centos_pkg_dirs - Folders to build the pkgs
  • sample-app - Sample app application

Install

  • Navigate to the path /usr/local/share/applications/helm/
  • The metrics-server-1.0-1.tgz will be present
  • Run system application-upload metrics-server-1.0-1.tgz
  • Run system application-list to see if it was uploaded
  • Run system helm-override-update --reuse-values --set sampleApp.create=true metrics-server metrics-server metrics-server If you want to deploy the sample app
  • Run system application-apply metrics-server
  • Run system application-list to see if it was applied
  • Run kubectl get pods -l app=metrics-server -n metrics-server to see the pod running