<p dir="auto">These volumes don't support stats metrics, and yet the errors got printed out periodically for each pod.</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="I0614 17:01:54.337456   30118 volume_stat_caculator.go:103] Failed to calculate volume metrics for pod kube-proxy-e2e-test-yjhong-minion-group-21rr_kube-system(b7c4ad73450e2cf13c9cb849231754c2) volume kubeconfig: metrics are not supported for MetricsNil Volumes
I0614 17:01:54.337464   30118 volume_stat_caculator.go:103] Failed to calculate volume metrics for pod kube-proxy-e2e-test-yjhong-minion-group-21rr_kube-system(b7c4ad73450e2cf13c9cb849231754c2) volume varlog: metrics are not supported for MetricsNil Volumes
I0614 17:01:54.337544   30118 volume_stat_caculator.go:103] Failed to calculate volume metrics for pod e2e-image-puller-e2e-test-yjhong-minion-group-21rr_kube-system(0d136a4468db307b8063df140402a70e) volume socket: metrics are not supported for MetricsNil Volumes
I0614 17:01:54.337563   30118 volume_stat_caculator.go:103] Failed to calculate volume metrics for pod e2e-image-puller-e2e-test-yjhong-minion-group-21rr_kube-system(0d136a4468db307b8063df140402a70e) volume docker: metrics are not supported for MetricsNil Volumes
I0614 17:01:54.337591   30118 volume_stat_caculator.go:103] Failed to calculate volume metrics for pod node-problem-detector-v0.1-oa8xn_kube-system(b9edf393-3187-11e6-8f11-42010af00002) volume log: metrics are not supported for MetricsNil Volumes"><pre class="notranslate"><code class="notranslate">I0614 17:01:54.337456   30118 volume_stat_caculator.go:103] Failed to calculate volume metrics for pod kube-proxy-e2e-test-yjhong-minion-group-21rr_kube-system(b7c4ad73450e2cf13c9cb849231754c2) volume kubeconfig: metrics are not supported for MetricsNil Volumes
I0614 17:01:54.337464   30118 volume_stat_caculator.go:103] Failed to calculate volume metrics for pod kube-proxy-e2e-test-yjhong-minion-group-21rr_kube-system(b7c4ad73450e2cf13c9cb849231754c2) volume varlog: metrics are not supported for MetricsNil Volumes
I0614 17:01:54.337544   30118 volume_stat_caculator.go:103] Failed to calculate volume metrics for pod e2e-image-puller-e2e-test-yjhong-minion-group-21rr_kube-system(0d136a4468db307b8063df140402a70e) volume socket: metrics are not supported for MetricsNil Volumes
I0614 17:01:54.337563   30118 volume_stat_caculator.go:103] Failed to calculate volume metrics for pod e2e-image-puller-e2e-test-yjhong-minion-group-21rr_kube-system(0d136a4468db307b8063df140402a70e) volume docker: metrics are not supported for MetricsNil Volumes
I0614 17:01:54.337591   30118 volume_stat_caculator.go:103] Failed to calculate volume metrics for pod node-problem-detector-v0.1-oa8xn_kube-system(b9edf393-3187-11e6-8f11-42010af00002) volume log: metrics are not supported for MetricsNil Volumes
</code></pre></div>
<p dir="auto">Many volumes do not support GetMetrics and return an error when called.  Because this returns an error, we cannot differentiate from an actual error condition when a volume that does support metrics fails to gather metrics.  The latter should be logged and investigated, whereas the former should be silently ignored.</p>