https://github.com/voelzmo/draw-vpa-histograms

Simple script to draw diagrams from VPA histogram information
https://github.com/voelzmo/draw-vpa-histograms

autoscaling k8s kubernetes vertical-pod-autoscaler vpa

Last synced: 1 day ago
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Simple script to draw diagrams from VPA histogram information

• Host: GitHub
• URL: https://github.com/voelzmo/draw-vpa-histograms
• Owner: voelzmo
• License: mit
• Created: 2022-05-27T14:56:43.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2024-05-03T11:49:52.000Z (8 months ago)
• Last Synced: 2024-11-08T23:12:39.209Z (about 2 months ago)
• Topics: autoscaling, k8s, kubernetes, vertical-pod-autoscaler, vpa
• Language: Python
• Homepage:
• Size: 21.5 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# What is this?

Ever wondered what the values in a VerticalPodAutoscalerCheckpoint even mean?

As a human it is hard to understand this

```json

{

  "apiVersion": "autoscaling.k8s.io/v1",

  "kind": "VerticalPodAutoscalerCheckpoint",

  "metadata": {

    "creationTimestamp": "2020-07-24T02:08:41Z",

    "name": "my-vpa-checkpoint",

    "namespace": "default"

  },

  "spec": {

    "containerName": "my-container",

    "vpaObjectName": "my-container-vpa"

  },

  "status": {

    "firstSampleStart": "2020-07-22T04:46:22Z",

    "lastSampleStart": "2022-05-27T15:11:24Z",

    "lastUpdateTime": "2022-05-27T15:11:47Z",

    "memoryHistogram": {

      "bucketWeights": {

        "2": 38,

        "35": 1,

        "36": 1,

        "37": 2,

        "38": 55,

        "39": 704,

        "40": 3788,

        "41": 10000,

        "42": 5422,

        "43": 2923,

        "44": 402,

        "45": 32,

        "46": 5212,

        "47": 1,

        "48": 7

      },

      "referenceTimestamp": "2022-05-28T00:00:00Z",

      "totalWeight": 6.673685189638553

    },

    "totalSamplesCount": 650223,

    "version": "v3"

  }

}

```

but much easier to grasp what's going on by looking at a picture!

# Usage

This script expects the `bucketWeights` section of a VerticalPodAutoscalerCheckpoint object as input on `stdin`.

```

$ kubectl get verticalpodautoscalercheckpoints.autoscaling.k8s.io my-vpa-checkpoint -o jsonpath={.status.memoryHistogram.bucketWeights} | python ./plot.py --resource=memory

```

And prints you a nice bar chart like this



CPU histograms now supported as well:

```

$ kubectl get verticalpodautoscalercheckpoints.autoscaling.k8s.io my-vpa-checkpoint -o jsonpath={.status.cpuHistogram.bucketWeights} | python ./plot.py --resource=cpu

```

Note: the y-axis is still normalized, this means the values are not actual occurrences, but the highest bucket will always be listed as `10000`.

# Requirements

This script requires python 3 and `matplotlib` installed.