test(metrics): pvc namespace included in volume metrics

Signed-off-by: Antonin Ferrand <[email protected]>

docs/content/manual/release-specific/v1.6.0/test-pvc-name-and-namespace-included-in-volume-metrics.md

@@ -0,0 +1,47 @@
+---
+title: Test PVC Name and Namespace included in the volume metrics
+---
+
+## Related issues
+
+- https://github.com/longhorn/longhorn/issues/5297
+- https://github.com/longhorn/longhorn-manager/pull/2284
+
+## Test step
+
+**Given** created 2 volumes (volume-1, volume-2)
+
+**When** PVC created for volume (volume-1)
+And attached volumes (volume-1, volume-2)
+
+**Then** metrics with `longhorn_volume_` prefix should include `pvc="volume-1"`
+
+```bash
+curl -sSL http://10.0.2.212:32744/metrics | grep longhorn_volume | grep ip-10-0-2-151 | grep volume-1
+longhorn_volume_actual_size_bytes{namespace="default",node="ip-10-0-2-151",pvc="volume-1",volume="volume-1"} 0
+longhorn_volume_capacity_bytes{namespace="default",node="ip-10-0-2-151",pvc="volume-1",volume="volume-1"} 1.073741824e+09
+longhorn_volume_read_iops{namespace="default",node="ip-10-0-2-151",pvc="volume-1",volume="volume-1"} 0
+longhorn_volume_read_latency{namespace="default",node="ip-10-0-2-151",pvc="volume-1",volume="volume-1"} 0
+longhorn_volume_read_throughput{namespace="default",node="ip-10-0-2-151",pvc="volume-1",volume="volume-1"} 0
+longhorn_volume_robustness{namespace="default",node="ip-10-0-2-151",pvc="volume-1",volume="volume-1"} 1
+longhorn_volume_state{namespace="default",node="ip-10-0-2-151",pvc="volume-1",volume="volume-1"} 2
+longhorn_volume_write_iops{namespace="default",node="ip-10-0-2-151",pvc="volume-1",volume="volume-1"} 0
+longhorn_volume_write_latency{namespace="default",node="ip-10-0-2-151",pvc="volume-1",volume="volume-1"} 0
+longhorn_volume_write_throughput{namespace="default",node="ip-10-0-2-151",pvc="volume-1",volume="volume-1"} 0
+```
+
+And metrics with `longhorn_volume_` prefix should include `pvc=""` for (volume-2)
+
+```bash
+> curl -sSL http://10.0.2.212:32744/metrics | grep longhorn_volume | grep ip-10-0-2-151 | grep volume-2
+longhorn_volume_actual_size_bytes{namespace="",node="ip-10-0-2-151",pvc="",volume="volume-2"} 0
+longhorn_volume_capacity_bytes{namespace="",node="ip-10-0-2-151",pvc="",volume="volume-2"} 1.073741824e+09
+longhorn_volume_read_iops{namespace="",node="ip-10-0-2-151",pvc="",volume="volume-2"} 0
+longhorn_volume_read_latency{namespace="",node="ip-10-0-2-151",pvc="",volume="volume-2"} 0
+longhorn_volume_read_throughput{namespace="",node="ip-10-0-2-151",pvc="",volume="volume-2"} 0
+longhorn_volume_robustness{namespace="",node="ip-10-0-2-151",pvc="",volume="volume-2"} 1
+longhorn_volume_state{namespace="",node="ip-10-0-2-151",pvc="",volume="volume-2"} 2
+longhorn_volume_write_iops{namespace="",node="ip-10-0-2-151",pvc="",volume="volume-2"} 0
+longhorn_volume_write_latency{namespace="",node="ip-10-0-2-151",pvc="",volume="volume-2"} 0
+longhorn_volume_write_throughput{namespace="",node="ip-10-0-2-151",pvc="",volume="volume-2"} 0
+```