fix PVC detection on microk8s

common/volumes.go

@@ -5,18 +5,13 @@ import (
 )
 
 var (
-	k8sVolumeDir = regexp.MustCompile(`.+/(volumes/kubernetes.io~([^/]+)|volume-subpaths|k3s/storage)/(pvc-[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12})`)
+	k8sVolumeDir = regexp.MustCompile(`.+(pvc-[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}).*`)
 )
 
 func ParseKubernetesVolumeSource(source string) string {
 	groups := k8sVolumeDir.FindStringSubmatch(source)
-	if len(groups) != 4 {
+	if len(groups) != 2 {
 		return ""
 	}
-	provisioner, volume := groups[2], groups[3]
-	switch provisioner {
-	case "secret", "configmap", "empty-dir", "projected":
-		return ""
-	}
-	return volume
+	return groups[1]
 }

common/volumes_test.go

@@ -19,6 +19,10 @@ func TestParseKubernetesVolumeSource(t *testing.T) {
 		"pvc-d0c0cc92-ef36-4b4f-90c0-5c5ed489df0b",
 		ParseKubernetesVolumeSource("/var/lib/rancher/k3s/storage/pvc-d0c0cc92-ef36-4b4f-90c0-5c5ed489df0b_default_mongod-data-mongo-psmdb-db-rs0-0"))
 
+	assert.Equal(t,
+		"pvc-4bf620ab-bb10-4cd6-803a-5be8735ccaf6",
+		ParseKubernetesVolumeSource("/var/snap/microk8s/common/default-storage/coroot-coroot-data-pvc-4bf620ab-bb10-4cd6-803a-5be8735ccaf6"))
+
 	assert.Equal(t,
 		"",
 		ParseKubernetesVolumeSource("/var/lib/kubelet/pods/adf669ca-c3f8-49de-9ad4-9dd66721dc0d/volumes/kubernetes.io~projected/kube-api-access-jvvq6"),