Add csi-volume-device-exporter: Prometheus exporter for CSI volume-to-device mapping#1039
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sradco wants to merge 1 commit into
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Add csi-volume-device-exporter: Prometheus exporter for CSI volume-to-device mapping#1039sradco wants to merge 1 commit into
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…-device mapping Add a new csi-volume-device-exporter binary that discovers CSI volume to block device mappings on each node and exposes them as Prometheus metrics. This enables correlating storage path health metrics (multipath state, NVMe-oF subsystem health) with Kubernetes PersistentVolumes. Components: - cmd/csi-volume-device-exporter: main entry point - internal/exporter/discovery: volume discovery engines (kubelet, trident, HPE) with sysfs/mountinfo resolution - internal/exporter/monitoring: Prometheus metrics and alert rules - deploy/exporter: DaemonSet, PodMonitor, and OpenShift SCC manifests - docs/csi-volume-device-exporter: feature docs and alert runbooks - hack/prom-rule-ci: promtool-based alert rule tests - build/Containerfile.exporter: container image build - test/e2e/exporter: end-to-end tests Alert rules: - CSIVolumeMultipathDegraded/Lost: multipath path health - CSIVolumeNVMeSubsystemDegraded/Lost: NVMe-oF subsystem health - CSIVolumeDeviceExporterDown: exporter availability Based on: openshift-virtualization/csi-volume-device-exporter#1 Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
csi-volume-device-exporterbinary that discovers CSI volume to block device mappings on each node and exposes them as Prometheus metrics (csi_volume_node_device_info)Components added
cmd/csi-volume-device-exporter/internal/exporter/discovery/internal/exporter/monitoring/deploy/exporter/docs/csi-volume-device-exporter/hack/prom-rule-ci/build/Containerfile.exportertest/e2e/exporter/tools/generate-exporter-rules/Discovery engines
vol_data.json+/proc/1/mountinfo+/sys/dev/block/to map CSI volumes to block devices; handles filesystem, block, and publish-mount volumesdeviceInfo.jsonfilesAll discoverers resolve LUKS-over-multipath stacks, returning the underlying multipath device.
Based on: openshift-virtualization/csi-volume-device-exporter#1
Test plan
go test -race ./internal/exporter/...go build ./cmd/csi-volume-device-exporter/...go vetcleango test -tags=e2e ./test/e2e/exporter/hack/prom-rule-ci/verify-rules.shmake docker-build-exporterMade with Cursor