Add origin of the metric in help

[RDruon]

New help, not all metrics are shown:

# HELP lustre_available_kilobytes Number of kilobytes readily available in the pool. Originating from 'osd-*.*.kbytesavail'
# HELP lustre_capacity_kilobytes Capacity of the pool in kilobytes. Originating from 'osd-*.*.kbytestotal'
# HELP lustre_connected_clients Number of connected clients. Originating from 'mdt.*.exports.*.uuid'
# HELP lustre_dio_frags Current disk IO fragmentation for the given size. Originating from 'osd-*.*.brw_stats'
# HELP lustre_discontiguous_blocks_total Originating from 'osd-*.*.brw_stats'
# HELP lustre_discontiguous_pages_total Total number of logical discontinuities per RPC. Originating from 'osd-*.*.brw_stats'
# HELP lustre_disk_io Current number of I/O operations that are processing during the snapshot. Originating from 'osd-*.*.brw_stats'
# HELP lustre_disk_io_total Total number of operations the filesystem has performed for the given size. Originating from 'osd-*.*.brw_stats'
# HELP lustre_drop_bytes_total Total number of bytes that have been dropped. Originating from 'lnetctl stats show'
# HELP lustre_drop_count_total Total number of messages that have been dropped. Originating from 'lnetctl net show -v 4'
# HELP lustre_exports_dirty_total Total number of exports that have been marked dirty. Originating from 'obdfilter.*OST*.tot_dirty'
# HELP lustre_exports_granted_total Total number of exports that have been marked granted. Originating from 'obdfilter.*OST*.tot_granted'
# HELP lustre_exports_pending_total Total number of exports that have been marked pending. Originating from 'obdfilter.*OST*.tot_pending'
# HELP lustre_exports_total Total number of times the pool has been exported. Originating from 'mgs.*.num_exports'/'mdt.*MDT*.num_exports'/'obdfilter.*OST*.num_exports' for MGT/MDT/OST
# HELP lustre_free_kilobytes Number of kilobytes allocated to the pool. Originating from 'osd-*.*.kbytesfree'
# HELP lustre_inodes_free The number of inodes (objects) available. Originating from 'osd-*.*.filesfree'
# HELP lustre_inodes_maximum The maximum number of inodes (objects) the filesystem can hold. Originating from 'osd-*.*.filestotal'
# HELP lustre_io_time_milliseconds_total Total time in milliseconds the filesystem has spent processing various object sizes. Originating from 'osd-*.*.brw_stats'
# HELP lustre_lock_contended_total Number of contended locks. Originating from 'ldlm.namespaces.{mdt-,filter-}*.contended_locks'
# HELP lustre_lock_contention_seconds_total Time in seconds during which locks were contended. Originating from 'ldlm.namespaces.{mdt-,filter-}*.contention_seconds'
# HELP lustre_lock_count_total Number of locks. Originating from 'ldlm.namespaces.{mdt-,filter-}*.lock_count'
# HELP lustre_lock_timeout_total Number of lock timeouts. Originating from 'ldlm.namespaces.{mdt-,filter-}*.lock_timeouts'
# HELP lustre_pages_per_bulk_rw_total Total number of pages per block RPC. Originating from 'osd-*.*.brw_stats'
# HELP lustre_read_bytes_total The total number of bytes that have been read. Originating from 'obdfilter.*OST*.stats'
# HELP lustre_read_maximum_size_bytes The maximum read size in bytes. Originating from 'obdfilter.*OST*.stats'
# HELP lustre_read_minimum_size_bytes The minimum read size in bytes. Originating from 'obdfilter.*OST*.stats'
# HELP lustre_read_samples_total Total number of reads that have been recorded. Originating from 'obdfilter.*OST*.stats'
# HELP lustre_receive_bytes_total Total number of bytes that have been received. Originating from 'lnetctl stats show'
# HELP lustre_receive_count_total Total number of messages that have been received. Originating from 'lnetctl net show -v 4'
# HELP lustre_send_bytes_total Total number of bytes that have been sent. Originating from 'lnetctl stats show'
# HELP lustre_send_count_total Total number of messages that have been sent. Originating from 'lnetctl net show -v 4'
# HELP lustre_stats_total Number of operations the filesystem has performed. Originating from 'mdt.*.md_stats'
# HELP lustre_write_bytes_total The total number of bytes that have been written. Originating from 'obdfilter.*OST*.stats'
# HELP lustre_write_maximum_size_bytes The maximum write size in bytes. Originating from 'obdfilter.*OST*.stats'
# HELP lustre_write_minimum_size_bytes The minimum write size in bytes. Originating from 'obdfilter.*OST*.stats'
# HELP lustre_write_samples_total Total number of writes that have been recorded. Originating from 'obdfilter.*OST*.stats' 

[jgrund]

Not wild about this approach as it depends on names here to consistently be aligned with what's upstream in lustre_collector.

[RDruon]

Not wild about this approach as it depends on names here to consistently be aligned with what's upstream in lustre_collector.

So lustre_collector should report the origin of the stat and then we use it here?

[jgrund]

Not wild about this approach as it depends on names here to consistently be aligned with what's upstream in lustre_collector.

So lustre_collector should report the origin of the stat and then we use it here?

Something along those lines.