Exposed metrics improvements

[safronovD]

Discussion to collect metrics, which are implemented in other CSI drivers

[cruelscript]

DirectPV (direct-csi)

These metrics categorized by labels ['tenant', 'volumeID', 'node'].

Metrics	Description	Example
directpv_stats_bytes_used	Shows amount of bytes used in given node
directpv_stats_bytes_total	Total bytes used	directpv_stats_bytes_used {tenant="tenant-1", node="node-5"} – To filter out the volumes of tenant tenant-1 scheduled in node-5 node

Longhorn

Volume

Metrics	Description	Example
longhorn_volume_actual_ size_bytes	Actual space used by each replica of the volume on the corresponding node	longhorn_volume_actual_size_bytes {node="worker-2”,volume="testvol”} 1.1917312e+08
longhorn_volume_capacity_bytes	Configured size in bytes for this volume	longhorn_volume_capacity_bytes {node="worker-2”,volume="testvol”} 6.442450944e+09
longhorn_volume_state	State of this volume: 1=creating, 2=attached, 3=Detached, 4=Attaching, 5=Detaching, 6=Deleting	longhorn_volume_state {node="worker-2”,volume="testvol”} 2
longhorn_volume_robustness	Robustness of this volume: 0=unknown, 1=healthy, 2=degraded, 3=faulted	longhorn_volume_robustness {node="worker-2”,volume="testvol”} 1

Node

Metrics	Description	Example
longhorn_node_status	Status of this node: 1=true, 0=false	longhorn_node_status {condition="ready”, condition_reason=”", node="worker-2”} 1
longhorn_node_count_total	Total number of nodes in the Longhorn system	longhorn_node_count_total 4
longhorn_node_cpu_ capacity_millicpu	The maximum allocatable CPU on this node	longhorn_node_cpu_ capacity_millicpu {node="worker-2”} 2000
longhorn_node_cpu_ usage_millicpu	The CPU usage on this node	longhorn_node_cpu_ usage_millicpu {node="pworker-2”} 186
longhorn_node_memory_ capacity_bytes	The maximum allocatable memory on this node	longhorn_node_memory_ capacity_bytes {node="worker-2”} 4.031229952e+09
longhorn_node_memory_ usage_bytes	The memory usage on this node	longhorn_node_memory_ usage_bytes {node="worker-2”} 1.833582592e+09
longhorn_node_storage_ capacity_bytes	The storage capacity of this node	longhorn_node_ storage_ capacity_bytes {node="worker-3”} 8.3987283968e+10
longhorn_node_storage_ usage_bytes	The used storage of this node	longhorn_node_storage_ usage_bytes {node="worker-3”} 9.060941824e+09
longhorn_node_storage_ reservation_bytes	The reserved storage for other applications and system on this node	longhorn_node_storage_ reservation_bytes {node="worker-3”} 2.519618519e+10

Disk

Metrics	Description	Example
longhorn_disk_capacity_bytes	The storage capacity of this disk	longhorn_disk_capacity_bytes {disk="default-disk-8b28ee3134628183”,node="worker-3”} 8.3987283968e+10
longhorn_disk_usage_bytes	The used storage of this disk	longhorn_disk_usage_bytes {disk="default-disk-8b28ee3134628183”,node="worker-3”} 9.060941824e+09
longhorn_disk_ reservation_bytes	The reserved storage for other applications and system on this disk	longhorn_disk_reservation_bytes {disk="default-disk-8b28ee3134628183”,node="worker-3”} 2.519618519e+10

Instance Manager

Metrics	Description	Example
longhorn_instance_manager _cpu_usage_millicpu	The cpu usage of this longhorn instance manager	longhorn_instance_manager_ cpu_usage_millicpu {instance_manager="instance-manager-e-2189ed13”, instance_manager_type="engine”, node="worker-2”} 80
longhorn_instance_manager _cpu_requests_millicpu	Requested CPU resources in kubernetes of this Longhorn instance manager	longhorn_instance_manager_ cpu_requests_millicpu {instance_manager="instance-manager-e-2189ed13”, instance_manager_type="engine”, node="worker-2”} 250
longhorn_instance_manager _memory_usage_bytes	The memory usage of this longhorn instance manager	longhorn_instance_manager_ memory_usage_bytes {instance_manager="instance-manager-e-2189ed13”, instance_manager_type="engine”, node="worker-2”} 2.4072192e+07
longhorn_instance_manager _memory_requests_bytes	Requested memory in Kubernetes of this longhorn instance manager	longhorn_instance_manager_ memory_requests_bytes {instance_manager="instance-manager-e-2189ed13”, instance_manager_type="engine”, node="worker-2”} 0

Manager

Metrics	Description	Example
longhorn_manager_ cpu_usage_millicpu	The CPU usage of this Longhorn Manager	longhorn_manager_ cpu_usage_millicpu {manager="longhorn-manager-5rx2n”, node="worker-2”} 27
longhorn_manager_ memory_usage_bytes	The memory usage of this Longhorn Manager	longhorn_manager_memory_usage_bytes {manager="longhorn-manager-5rx2n”,node="worker-2”} 2.6144768e+07

TopoLVM

TopoLVM uses kubelet usage metrics.

Metrics	Description
kubelet_volume_stats_available_bytes	The number of available bytes in the volume
kubelet_volume_stats_capacity_bytes	The capacity in bytes of the volume
kubelet_volume_stats_inodes	The maximum number of inodes in the volume
kubelet_volume_stats_inodes_free	The number of free inodes in the volume
kubelet_volume_stats_inodes_used	The number of used inodes in the volume
kubelet_volume_stats_used_bytes	The number of used bytes in the volume

csi-driver-lvm

We don’t found anything neither in this repository documentation nor in the csi-lvm repository
from which current csi-driver-lvm was derived.

[safronovD]

https://scod.hpedev.io/csi_driver/metrics.html