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Type: Bug
Resolution: Fixed
Priority: Major
Component/s: prometheus-plugin
Labels:
None
Environment:
Prometheus metrics plugin: 2.0.10

Released As:
2.0.11

Jenkins logs are full of:

Oct 04, 2021 11:16:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable
Oct 04, 2021 11:18:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable
Oct 04, 2021 11:20:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable
Oct 04, 2021 11:22:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable
Oct 04, 2021 11:24:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable
Oct 04, 2021 11:26:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable
Oct 04, 2021 11:28:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable
Oct 04, 2021 11:30:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable
Oct 04, 2021 11:32:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable
Oct 04, 2021 11:34:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable
Oct 04, 2021 11:36:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable
Oct 04, 2021 11:38:54 AM WARNING org.jenkinsci.plugins.prometheus.DiskUsageCollector collect
Cannot get disk usage data. Install CloudBees Disk Usage Simple plugin to enable

Even when the "Collect disk usage" button is unchecked:

I've analyzed the code and it seams that the "Collect disk usage" configuration option is ignored, see marked lines in

The collector is always enabled (true is returned). The ConfigurationUtils class should execute getCollectDiskUsage instead of getDefaultCollectDiskUsage.

We use Configuration As A Code to configure the plugin:

data:
  configuration-as-code.yaml: |
    unclassified:
      prometheusConfiguration:
        appendParamLabel: false
        appendStatusLabel: false
        collectDiskUsage: false
        collectingMetricsPeriodInSeconds: 120
        countAbortedBuilds: true
        countFailedBuilds: true
        countNotBuiltBuilds: true
        countSuccessfulBuilds: true
        countUnstableBuilds: true
        defaultNamespace: "default"
        fetchTestResults: true
        jobAttributeName: "jenkins_job"
        path: "prometheus-metrics"
        processingDisabledBuilds: false
        useAuthenticatedEndpoint: false