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[Deprecated] Kubernetes PVCs[Deprecated] Kubernetes PVCs
[Deprecated] Kubernetes PVCs

[Deprecated] Kubernetes PVCs

Monitor your Kubernetes persistent volume claims and alert on capacity limits.

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  • Release notes

Overview

This extension is deprecated with Dynatrace 1.294 and will not work anymore with Dynatrace 1.296. For replacement of this extension, check out the following community guide.

This is an extension for monitoring Kubernetes persistent volume claims. It comes with an out-of-the-box dashboard and pre-configured alerts for ease of use.

Use cases

  • Monitor Kubernetes persistent volume claims for disk usage and capacity.
  • Alert on disk space growth rates (for example, detect log spam).
  • Create custom dashboards and alerts using volume stats metrics exposed by the kubelet.

Get started

For more information on the installation and configuration, please see [Deprecated] Kubernetes PVCs extension in the Dynatrace Documentation.

Details

Setup

Enable persistent volume claim monitoring in Dynatrace

In your Dynatrace environment, go to Kubernetes > Cluster > Settings and turn on Monitor persistent volume claims.

The following three kubelet metrics are then ingested into Dynatrace:

  • kubelet_volume_stats_capacity_bytes
  • kubelet_volume_stats_available_bytes
  • kubelet_volume_stats_used_bytes

Go to the Metrics browser in your Dynatrace environment and verify that these metrics are there.

Add extension to environment

To add this extension to your environment, select Add to environment on the page of this extension in the Dynatrace Hub.

You will then find an out-of-the-box dashboard and pre-configured alerts. Go to Dashboards > Kubernetes persistent volume claims in Dynatrace to view key metrics of your persistent volume claims.

Activate metric events for alerting

This extension comes with 4 alerts covering the Used disk space growth rate use cases. These alerts are pre-configured for absolute (byte) and relative (percent) thresholds featuring critical and soft limits.

To activate the alerts

  1. Go to Settings > Anomaly detection > Custom events for alerting in your Dynatrace environment.
  2. Find the following Kubernetes persistent volume claims alerts:
    • Increased growth rate: Notifies you if a persistent volume claim's used disk space is constantly increasing (for example, detect log spam).
  3. If necessary, select the Edit button to customize the alert conditions.
  4. Activate an alert to get problem notifications.

Problem detection

Problems raised by the Kubernetes persistent volume claim alerts are listed in your Problems feed. These problems feature the impacted Kubernetes cluster entity, the Kubernetes namespace name, and the Persistent volume claim name. The Impacted infrastructure component tile gives details about the affected Kubernetes resources and violated thresholds.

Disabling

As persistent volume claim monitoring is subject to DDU consumption, it is important to stop it by disabling the Monitor persistent volume claim option in your Kubernetes cluster settings.

Compatibility information

  • Dynatrace version 1.262+
  • ActiveGate version 1.261+

The following permissions must be given on Kubernetes side:

  • Containerized "in-cluster" ActiveGate: list nodes, get nodes/metrics
  • External "outside-cluster" ActiveGate: list nodes, get nodes/proxy
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Customer story Abercrombie and Fitch
“Most other solutions are blind to containerized environments and struggle to instrument Kubernetes and Red Hat OpenShift. Dynatrace was purpose-built for these environments, giving us instant answers and out of the box value from day one.”
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Full version history

To have more information on how to install the downloaded package, please follow the instructions on this page.
ReleaseDate

Full version history

  • Add deprecation notes to PVC dashboard and PVC alerts.
  • PVC Dashboard shipped with this extensions now links to the new builtin PVC dashboard.

Full version history

  • Remove low disk space alerts as they are now part of the Kubernetes 'out-of-the-box' alerting

Full version history

  • Fixed the percentage calculations for both the ‘Top 10 used…’ and the ‘Top 10 available…’ tiles.
  • Fixed the capacity, usage, and count pie charts.
  • Fixed metric expressions in metric events.
  • Updated the documentation.

Full version history

  • Improved wording on the PVC dashboard.
  • Added a new tile on the PVC dashboard showing the top 10 used volume space in percent.

Full version history

  • Improved the Kubernetes persistent volume claims dashboard.
  • Dashboard filters for Kubernetes cluster, namespace and persistent volume claim.

Full version history

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