RFR: Initial support for ZFS on FreeBSD (#1224)
* WIP: Initial support for ZFS on FreeBSD * Added build directives * Ignore 'kstatPath' config option on FreeBSD * Added tests for ZFS FreeBSD input plugin. * Updated the README to confrom with the guidelines and added FreeBSD info * Fixed indents * Spell check
This commit is contained in:
Rickard von Essen
Cameron Sparr
parent
0aff7a0bc1
commit
9f7a758bf9
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@ -1,227 +1,294 @@
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# Telegraf plugin: zfs
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# ZFS plugin
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Get ZFS stat from /proc/spl/kstat/zfs
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This ZFS plugin provides metrics from your ZFS filesystems. It supports ZFS on
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Linux and FreeBSD. It gets ZFS stat from `/proc/spl/kstat/zfs` on Linux and
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from `sysctl` and `zpool` on FreeBSD.
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# Measurements
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### Configuration:
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Meta:
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```toml
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[[inputs.zfs]]
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## ZFS kstat path. Ignored on FreeBSD
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## If not specified, then default is:
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# kstatPath = "/proc/spl/kstat/zfs"
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- tags: `pools=POOL1::POOL2`
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## By default, telegraf gather all zfs stats
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## If not specified, then default is:
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# kstatMetrics = ["arcstats", "zfetchstats", "vdev_cache_stats"]
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Measurement names:
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## By default, don't gather zpool stats
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# poolMetrics = false
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```
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- arcstats_hits
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- arcstats_misses
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### Measurements & Fields:
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By default this plugin collects metrics about **Arc**, **Zfetch**, and
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**Vdev cache**. All these metrics are either counters or measure sizes
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in bytes. These metrics will be in the `zfs` measurement with the field
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names listed bellow.
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If `poolMetrics` is enabled then additional metrics will be gathered for
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each pool.
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- zfs
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With fields listed bellow.
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#### Arc Stats
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- arcstats_allocated (FreeBSD only)
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- arcstats_anon_evict_data (Linux only)
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- arcstats_anon_evict_metadata (Linux only)
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- arcstats_anon_evictable_data (FreeBSD only)
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- arcstats_anon_evictable_metadata (FreeBSD only)
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- arcstats_anon_size
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- arcstats_arc_loaned_bytes (Linux only)
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- arcstats_arc_meta_limit
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- arcstats_arc_meta_max
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- arcstats_arc_meta_min (FreeBSD only)
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- arcstats_arc_meta_used
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- arcstats_arc_no_grow (Linux only)
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- arcstats_arc_prune (Linux only)
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- arcstats_arc_tempreserve (Linux only)
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- arcstats_c
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- arcstats_c_max
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- arcstats_c_min
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- arcstats_data_size
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- arcstats_deleted
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- arcstats_demand_data_hits
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- arcstats_demand_data_misses
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- arcstats_demand_hit_predictive_prefetch (FreeBSD only)
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- arcstats_demand_metadata_hits
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- arcstats_demand_metadata_misses
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- arcstats_duplicate_buffers
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- arcstats_duplicate_buffers_size
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- arcstats_duplicate_reads
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- arcstats_evict_l2_cached
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- arcstats_evict_l2_eligible
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- arcstats_evict_l2_ineligible
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- arcstats_evict_l2_skip (FreeBSD only)
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- arcstats_evict_not_enough (FreeBSD only)
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- arcstats_evict_skip
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- arcstats_hash_chain_max
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- arcstats_hash_chains
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- arcstats_hash_collisions
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- arcstats_hash_elements
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- arcstats_hash_elements_max
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- arcstats_hdr_size
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- arcstats_hits
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- arcstats_l2_abort_lowmem
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- arcstats_l2_asize
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- arcstats_l2_cdata_free_on_write
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- arcstats_l2_cksum_bad
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- arcstats_l2_compress_failures
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- arcstats_l2_compress_successes
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- arcstats_l2_compress_zeros
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- arcstats_l2_evict_l1cached (FreeBSD only)
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- arcstats_l2_evict_lock_retry
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- arcstats_l2_evict_reading
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- arcstats_l2_feeds
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- arcstats_l2_free_on_write
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- arcstats_l2_hdr_size
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- arcstats_l2_hits
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- arcstats_l2_io_error
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- arcstats_l2_misses
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- arcstats_l2_read_bytes
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- arcstats_l2_rw_clash
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- arcstats_l2_size
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- arcstats_l2_write_buffer_bytes_scanned (FreeBSD only)
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- arcstats_l2_write_buffer_iter (FreeBSD only)
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- arcstats_l2_write_buffer_list_iter (FreeBSD only)
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- arcstats_l2_write_buffer_list_null_iter (FreeBSD only)
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- arcstats_l2_write_bytes
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- arcstats_l2_write_full (FreeBSD only)
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- arcstats_l2_write_in_l2 (FreeBSD only)
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- arcstats_l2_write_io_in_progress (FreeBSD only)
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- arcstats_l2_write_not_cacheable (FreeBSD only)
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- arcstats_l2_write_passed_headroom (FreeBSD only)
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- arcstats_l2_write_pios (FreeBSD only)
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- arcstats_l2_write_spa_mismatch (FreeBSD only)
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- arcstats_l2_write_trylock_fail (FreeBSD only)
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- arcstats_l2_writes_done
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- arcstats_l2_writes_error
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- arcstats_l2_writes_hdr_miss (Linux only)
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- arcstats_l2_writes_lock_retry (FreeBSD only)
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- arcstats_l2_writes_sent
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- arcstats_memory_direct_count (Linux only)
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- arcstats_memory_indirect_count (Linux only)
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- arcstats_memory_throttle_count
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- arcstats_meta_size (Linux only)
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- arcstats_mfu_evict_data (Linux only)
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- arcstats_mfu_evict_metadata (Linux only)
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- arcstats_mfu_ghost_evict_data (Linux only)
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- arcstats_mfu_ghost_evict_metadata (Linux only)
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- arcstats_metadata_size (FreeBSD only)
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- arcstats_mfu_evictable_data (FreeBSD only)
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- arcstats_mfu_evictable_metadata (FreeBSD only)
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- arcstats_mfu_ghost_evictable_data (FreeBSD only)
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- arcstats_mfu_ghost_evictable_metadata (FreeBSD only)
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- arcstats_mfu_ghost_hits
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- arcstats_mfu_ghost_size
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- arcstats_mfu_hits
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- arcstats_mfu_size
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- arcstats_misses
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- arcstats_mru_evict_data (Linux only)
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- arcstats_mru_evict_metadata (Linux only)
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- arcstats_mru_ghost_evict_data (Linux only)
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- arcstats_mru_ghost_evict_metadata (Linux only)
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- arcstats_mru_evictable_data (FreeBSD only)
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- arcstats_mru_evictable_metadata (FreeBSD only)
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- arcstats_mru_ghost_evictable_data (FreeBSD only)
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- arcstats_mru_ghost_evictable_metadata (FreeBSD only)
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- arcstats_mru_ghost_hits
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- arcstats_mru_ghost_size
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- arcstats_mru_hits
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- arcstats_mru_size
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- arcstats_mutex_miss
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- arcstats_other_size
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- arcstats_p
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- arcstats_prefetch_data_hits
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- arcstats_prefetch_data_misses
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- arcstats_prefetch_metadata_hits
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- arcstats_prefetch_metadata_misses
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- arcstats_mru_hits
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- arcstats_mru_ghost_hits
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- arcstats_mfu_hits
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- arcstats_mfu_ghost_hits
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- arcstats_deleted
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- arcstats_recycle_miss
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- arcstats_mutex_miss
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- arcstats_evict_skip
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- arcstats_evict_l2_cached
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- arcstats_evict_l2_eligible
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- arcstats_evict_l2_ineligible
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- arcstats_hash_elements
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- arcstats_hash_elements_max
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- arcstats_hash_collisions
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- arcstats_hash_chains
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- arcstats_hash_chain_max
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- arcstats_p
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- arcstats_c
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- arcstats_c_min
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- arcstats_c_max
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- arcstats_recycle_miss (Linux only)
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- arcstats_size
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- arcstats_hdr_size
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- arcstats_data_size
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- arcstats_meta_size
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- arcstats_other_size
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- arcstats_anon_size
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- arcstats_anon_evict_data
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- arcstats_anon_evict_metadata
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- arcstats_mru_size
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- arcstats_mru_evict_data
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- arcstats_mru_evict_metadata
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- arcstats_mru_ghost_size
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- arcstats_mru_ghost_evict_data
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- arcstats_mru_ghost_evict_metadata
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- arcstats_mfu_size
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- arcstats_mfu_evict_data
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- arcstats_mfu_evict_metadata
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- arcstats_mfu_ghost_size
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- arcstats_mfu_ghost_evict_data
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- arcstats_mfu_ghost_evict_metadata
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- arcstats_l2_hits
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- arcstats_l2_misses
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- arcstats_l2_feeds
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- arcstats_l2_rw_clash
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- arcstats_l2_read_bytes
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- arcstats_l2_write_bytes
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- arcstats_l2_writes_sent
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- arcstats_l2_writes_done
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- arcstats_l2_writes_error
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- arcstats_l2_writes_hdr_miss
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- arcstats_l2_evict_lock_retry
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- arcstats_l2_evict_reading
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- arcstats_l2_free_on_write
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- arcstats_l2_cdata_free_on_write
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- arcstats_l2_abort_lowmem
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- arcstats_l2_cksum_bad
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- arcstats_l2_io_error
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- arcstats_l2_size
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- arcstats_l2_asize
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- arcstats_l2_hdr_size
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- arcstats_l2_compress_successes
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- arcstats_l2_compress_zeros
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- arcstats_l2_compress_failures
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- arcstats_memory_throttle_count
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- arcstats_duplicate_buffers
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- arcstats_duplicate_buffers_size
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- arcstats_duplicate_reads
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- arcstats_memory_direct_count
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- arcstats_memory_indirect_count
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- arcstats_arc_no_grow
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- arcstats_arc_tempreserve
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- arcstats_arc_loaned_bytes
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- arcstats_arc_prune
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- arcstats_arc_meta_used
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- arcstats_arc_meta_limit
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- arcstats_arc_meta_max
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- arcstats_sync_wait_for_async (FreeBSD only)
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#### Zfetch Stats
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- zfetchstats_bogus_streams (Linux only)
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- zfetchstats_colinear_hits (Linux only)
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- zfetchstats_colinear_misses (Linux only)
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- zfetchstats_hits
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- zfetchstats_max_streams (FreeBSD only)
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- zfetchstats_misses
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- zfetchstats_colinear_hits
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- zfetchstats_colinear_misses
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- zfetchstats_stride_hits
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- zfetchstats_stride_misses
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- zfetchstats_reclaim_successes
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- zfetchstats_reclaim_failures
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- zfetchstats_streams_resets
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- zfetchstats_streams_noresets
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- zfetchstats_bogus_streams
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- zfetchstats_reclaim_failures (Linux only)
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- zfetchstats_reclaim_successes (Linux only)
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- zfetchstats_streams_noresets (Linux only)
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- zfetchstats_streams_resets (Linux only)
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- zfetchstats_stride_hits (Linux only)
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- zfetchstats_stride_misses (Linux only)
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#### Vdev Cache Stats
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- vdev_cache_stats_delegations
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- vdev_cache_stats_hits
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- vdev_cache_stats_misses
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#### Pool Metrics (optional)
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On Linux:
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- zfs_pool
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- nread (integer, )
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- nwritten (integer, )
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- reads (integer, )
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- writes (integer, )
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- wtime (integer, )
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- wlentime (integer, )
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- wupdate (integer, )
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- rtime (integer, )
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- rlentime (integer, )
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- rupdate (integer, )
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- wcnt (integer, )
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- rcnt (integer, )
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On FreeBSD:
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- zfs_pool
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- allocated (integer, bytes)
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- capacity (integer, bytes)
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- dedupratio (float, ratio)
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- free (integer, bytes)
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- size (integer, bytes)
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- fragmentation (integer, percent)
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### Tags:
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- ZFS stats (`zfs`) will have the following tag:
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- pools - A `::` concatenated list of all ZFS pools on the machine.
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- Pool metrics (`zfs_pool`) will have the following tag:
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- pool - with the name of the pool which the metrics are for.
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- health - the health status of the pool. (FreeBSD only)
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### Example Output:
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```
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$ ./telegraf -config telegraf.conf -input-filter zfs -test
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* Plugin: zfs, Collection 1
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> zfs_pool,health=ONLINE,pool=zroot allocated=1578590208i,capacity=2i,dedupratio=1,fragmentation=1i,free=64456531968i,size=66035122176i 1464473103625653908
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> zfs,pools=zroot arcstats_allocated=4167764i,arcstats_anon_evictable_data=0i,arcstats_anon_evictable_metadata=0i,arcstats_anon_size=16896i,arcstats_arc_meta_limit=10485760i,arcstats_arc_meta_max=115269568i,arcstats_arc_meta_min=8388608i,arcstats_arc_meta_used=51977456i,arcstats_c=16777216i,arcstats_c_max=41943040i,arcstats_c_min=16777216i,arcstats_data_size=0i,arcstats_deleted=1699340i,arcstats_demand_data_hits=14836131i,arcstats_demand_data_misses=2842945i,arcstats_demand_hit_predictive_prefetch=0i,arcstats_demand_metadata_hits=1655006i,arcstats_demand_metadata_misses=830074i,arcstats_duplicate_buffers=0i,arcstats_duplicate_buffers_size=0i,arcstats_duplicate_reads=123i,arcstats_evict_l2_cached=0i,arcstats_evict_l2_eligible=332172623872i,arcstats_evict_l2_ineligible=6168576i,arcstats_evict_l2_skip=0i,arcstats_evict_not_enough=12189444i,arcstats_evict_skip=195190764i,arcstats_hash_chain_max=2i,arcstats_hash_chains=10i,arcstats_hash_collisions=43134i,arcstats_hash_elements=2268i,arcstats_hash_elements_max=6136i,arcstats_hdr_size=565632i,arcstats_hits=16515778i,arcstats_l2_abort_lowmem=0i,arcstats_l2_asize=0i,arcstats_l2_cdata_free_on_write=0i,arcstats_l2_cksum_bad=0i,arcstats_l2_compress_failures=0i,arcstats_l2_compress_successes=0i,arcstats_l2_compress_zeros=0i,arcstats_l2_evict_l1cached=0i,arcstats_l2_evict_lock_retry=0i,arcstats_l2_evict_reading=0i,arcstats_l2_feeds=0i,arcstats_l2_free_on_write=0i,arcstats_l2_hdr_size=0i,arcstats_l2_hits=0i,arcstats_l2_io_error=0i,arcstats_l2_misses=0i,arcstats_l2_read_bytes=0i,arcstats_l2_rw_clash=0i,arcstats_l2_size=0i,arcstats_l2_write_buffer_bytes_scanned=0i,arcstats_l2_write_buffer_iter=0i,arcstats_l2_write_buffer_list_iter=0i,arcstats_l2_write_buffer_list_null_iter=0i,arcstats_l2_write_bytes=0i,arcstats_l2_write_full=0i,arcstats_l2_write_in_l2=0i,arcstats_l2_write_io_in_progress=0i,arcstats_l2_write_not_cacheable=380i,arcstats_l2_write_passed_headroom=0i,arcstats_l2_write_pios=0i,arcstats_l2_write_spa_mismatch=0i,arcstats_l2_write_trylock_fail=0i,arcstats_l2_writes_done=0i,arcstats_l2_writes_error=0i,arcstats_l2_writes_lock_retry=0i,arcstats_l2_writes_sent=0i,arcstats_memory_throttle_count=0i,arcstats_metadata_size=17014784i,arcstats_mfu_evictable_data=0i,arcstats_mfu_evictable_metadata=16384i,arcstats_mfu_ghost_evictable_data=5723648i,arcstats_mfu_ghost_evictable_metadata=10709504i,arcstats_mfu_ghost_hits=1315619i,arcstats_mfu_ghost_size=16433152i,arcstats_mfu_hits=7646611i,arcstats_mfu_size=305152i,arcstats_misses=3676993i,arcstats_mru_evictable_data=0i,arcstats_mru_evictable_metadata=0i,arcstats_mru_ghost_evictable_data=0i,arcstats_mru_ghost_evictable_metadata=80896i,arcstats_mru_ghost_hits=324250i,arcstats_mru_ghost_size=80896i,arcstats_mru_hits=8844526i,arcstats_mru_size=16693248i,arcstats_mutex_miss=354023i,arcstats_other_size=34397040i,arcstats_p=4172800i,arcstats_prefetch_data_hits=0i,arcstats_prefetch_data_misses=0i,arcstats_prefetch_metadata_hits=24641i,arcstats_prefetch_metadata_misses=3974i,arcstats_size=51977456i,arcstats_sync_wait_for_async=0i,vdev_cache_stats_delegations=779i,vdev_cache_stats_hits=323123i,vdev_cache_stats_misses=59929i,zfetchstats_hits=0i,zfetchstats_max_streams=0i,zfetchstats_misses=0i 1464473103634124908
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```
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### Description
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```
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arcstats_hits
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Total amount of cache hits in the arc.
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A short description for some of the metrics.
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arcstats_misses
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Total amount of cache misses in the arc.
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#### Arc Stats
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arcstats_demand_data_hits
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Amount of cache hits for demand data, this is what matters (is good) for your application/share.
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`arcstats_hits` Total amount of cache hits in the arc.
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arcstats_demand_data_misses
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Amount of cache misses for demand data, this is what matters (is bad) for your application/share.
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`arcstats_misses` Total amount of cache misses in the arc.
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arcstats_demand_metadata_hits
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Ammount of cache hits for demand metadata, this matters (is good) for getting filesystem data (ls,find,…)
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`arcstats_demand_data_hits` Amount of cache hits for demand data, this is what matters (is good) for your application/share.
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arcstats_demand_metadata_misses
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Ammount of cache misses for demand metadata, this matters (is bad) for getting filesystem data (ls,find,…)
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`arcstats_demand_data_misses` Amount of cache misses for demand data, this is what matters (is bad) for your application/share.
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arcstats_prefetch_data_hits
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The zfs prefetcher tried to prefetch somethin, but it was allready cached (boring)
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`arcstats_demand_metadata_hits` Amount of cache hits for demand metadata, this matters (is good) for getting filesystem data (ls,find,…)
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arcstats_prefetch_data_misses
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The zfs prefetcher prefetched something which was not in the cache (good job, could become a demand hit in the future)
|
||||
`arcstats_demand_metadata_misses` Amount of cache misses for demand metadata, this matters (is bad) for getting filesystem data (ls,find,…)
|
||||
|
||||
arcstats_prefetch_metadata_hits
|
||||
Same as above, but for metadata
|
||||
`arcstats_prefetch_data_hits` The zfs prefetcher tried to prefetch something, but it was already cached (boring)
|
||||
|
||||
arcstats_prefetch_metadata_misses
|
||||
Same as above, but for metadata
|
||||
`arcstats_prefetch_data_misses` The zfs prefetcher prefetched something which was not in the cache (good job, could become a demand hit in the future)
|
||||
|
||||
arcstats_mru_hits
|
||||
Cache hit in the “most recently used cache”, we move this to the mfu cache.
|
||||
`arcstats_prefetch_metadata_hits` Same as above, but for metadata
|
||||
|
||||
arcstats_mru_ghost_hits
|
||||
Cache hit in the “most recently used ghost list” we had this item in the cache, but evicted it, maybe we should increase the mru cache size.
|
||||
`arcstats_prefetch_metadata_misses` Same as above, but for metadata
|
||||
|
||||
arcstats_mfu_hits
|
||||
Cache hit in the “most freqently used cache” we move this to the begining of the mfu cache.
|
||||
`arcstats_mru_hits` Cache hit in the “most recently used cache”, we move this to the mfu cache.
|
||||
|
||||
arcstats_mfu_ghost_hits
|
||||
Cache hit in the “most frequently used ghost list” we had this item in the cache, but evicted it, maybe we should increase the mfu cache size.
|
||||
`arcstats_mru_ghost_hits` Cache hit in the “most recently used ghost list” we had this item in the cache, but evicted it, maybe we should increase the mru cache size.
|
||||
|
||||
arcstats_allocated
|
||||
New data is written to the cache.
|
||||
`arcstats_mfu_hits` Cache hit in the “most frequently used cache” we move this to the beginning of the mfu cache.
|
||||
|
||||
arcstats_deleted
|
||||
Old data is evicted (deleted) from the cache.
|
||||
`arcstats_mfu_ghost_hits` Cache hit in the “most frequently used ghost list” we had this item in the cache, but evicted it, maybe we should increase the mfu cache size.
|
||||
|
||||
arcstats_evict_l2_cached
|
||||
We evicted something from the arc, but its still cached in the l2 if we need it.
|
||||
`arcstats_allocated` New data is written to the cache.
|
||||
|
||||
arcstats_evict_l2_eligible
|
||||
We evicted something from the arc, and it’s not in the l2 this is sad. (maybe we hadn’t had enough time to store it there)
|
||||
`arcstats_deleted` Old data is evicted (deleted) from the cache.
|
||||
|
||||
arcstats_evict_l2_ineligible
|
||||
We evicted something which cannot be stored in the l2.
|
||||
Reasons could be:
|
||||
We have multiple pools, we evicted something from a pool whithot an l2 device.
|
||||
The zfs property secondarycache.
|
||||
`arcstats_evict_l2_cached` We evicted something from the arc, but its still cached in the l2 if we need it.
|
||||
|
||||
arcstats_c
|
||||
Arc target size, this is the size the system thinks the arc should have.
|
||||
`arcstats_evict_l2_eligible` We evicted something from the arc, and it’s not in the l2 this is sad. (maybe we hadn’t had enough time to store it there)
|
||||
|
||||
arcstats_size
|
||||
Total size of the arc.
|
||||
`arcstats_evict_l2_ineligible` We evicted something which cannot be stored in the l2.
|
||||
Reasons could be:
|
||||
- We have multiple pools, we evicted something from a pool whithout an l2 device.
|
||||
- The zfs property secondary cache.
|
||||
|
||||
arcstats_l2_hits
|
||||
Hits to the L2 cache. (It was not in the arc, but in the l2 cache)
|
||||
`arcstats_c` Arc target size, this is the size the system thinks the arc should have.
|
||||
|
||||
arcstats_l2_misses
|
||||
Miss to the L2 cache. (It was not in the arc, and not in the l2 cache)
|
||||
`arcstats_size` Total size of the arc.
|
||||
|
||||
arcstats_l2_size
|
||||
Size of the l2 cache.
|
||||
`arcstats_l2_hits` Hits to the L2 cache. (It was not in the arc, but in the l2 cache)
|
||||
|
||||
arcstats_l2_hdr_size
|
||||
Size of the metadata in the arc (ram) used to manage (lookup if someting is in the l2) the l2 cache.
|
||||
`arcstats_l2_misses` Miss to the L2 cache. (It was not in the arc, and not in the l2 cache)
|
||||
|
||||
`arcstats_l2_size` Size of the l2 cache.
|
||||
|
||||
`arcstats_l2_hdr_size` Size of the metadata in the arc (ram) used to manage (lookup if something is in the l2) the l2 cache.
|
||||
|
||||
zfetchstats_hits
|
||||
Counts the number of cache hits, to items wich are in the cache because of the prefetcher.
|
||||
#### Zfetch Stats
|
||||
|
||||
zfetchstats_colinear_hits
|
||||
Counts the number of cache hits, to items wich are in the cache because of the prefetcher (prefetched linear reads)
|
||||
`zfetchstats_hits` Counts the number of cache hits, to items which are in the cache because of the prefetcher.
|
||||
|
||||
zfetchstats_stride_hits
|
||||
Counts the number of cache hits, to items wich are in the cache because of the prefetcher (prefetched stride reads)
|
||||
`zfetchstats_colinear_hits` Counts the number of cache hits, to items which are in the cache because of the prefetcher (prefetched linear reads)
|
||||
|
||||
`zfetchstats_stride_hits` Counts the number of cache hits, to items which are in the cache because of the prefetcher (prefetched stride reads)
|
||||
|
||||
#### Vdev Cache Stats
|
||||
|
||||
vdev_cache_stats_hits
|
||||
Hits to the vdev (device level) cache.
|
||||
|
||||
vdev_cache_stats_misses
|
||||
Misses to the vdev (device level) cache.
|
||||
```
|
||||
|
||||
# Default config
|
||||
|
||||
```
|
||||
[zfs]
|
||||
# ZFS kstat path
|
||||
# If not specified, then default is:
|
||||
# kstatPath = "/proc/spl/kstat/zfs"
|
||||
#
|
||||
# By default, telegraf gather all zfs stats
|
||||
# If not specified, then default is:
|
||||
# kstatMetrics = ["arcstats", "zfetchstats", "vdev_cache_stats"]
|
||||
```
|
||||
`vdev_cache_stats_hits` Hits to the vdev (device level) cache.
|
||||
|
||||
`vdev_cache_stats_misses` Misses to the vdev (device level) cache.
|
||||
|
|
|
|||
|
|
@ -1,38 +1,27 @@
|
|||
package zfs
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"path/filepath"
|
||||
"strconv"
|
||||
"strings"
|
||||
|
||||
"github.com/influxdata/telegraf"
|
||||
"github.com/influxdata/telegraf/internal"
|
||||
"github.com/influxdata/telegraf/plugins/inputs"
|
||||
)
|
||||
type Sysctl func(metric string) ([]string, error)
|
||||
type Zpool func() ([]string, error)
|
||||
|
||||
type Zfs struct {
|
||||
KstatPath string
|
||||
KstatMetrics []string
|
||||
PoolMetrics bool
|
||||
}
|
||||
|
||||
type poolInfo struct {
|
||||
name string
|
||||
ioFilename string
|
||||
sysctl Sysctl
|
||||
zpool Zpool
|
||||
}
|
||||
|
||||
var sampleConfig = `
|
||||
## ZFS kstat path
|
||||
## ZFS kstat path. Ignored on FreeBSD
|
||||
## If not specified, then default is:
|
||||
kstatPath = "/proc/spl/kstat/zfs"
|
||||
# kstatPath = "/proc/spl/kstat/zfs"
|
||||
|
||||
## By default, telegraf gather all zfs stats
|
||||
## If not specified, then default is:
|
||||
kstatMetrics = ["arcstats", "zfetchstats", "vdev_cache_stats"]
|
||||
# kstatMetrics = ["arcstats", "zfetchstats", "vdev_cache_stats"]
|
||||
|
||||
## By default, don't gather zpool stats
|
||||
poolMetrics = false
|
||||
# poolMetrics = false
|
||||
`
|
||||
|
||||
func (z *Zfs) SampleConfig() string {
|
||||
|
|
@ -40,117 +29,5 @@ func (z *Zfs) SampleConfig() string {
|
|||
}
|
||||
|
||||
func (z *Zfs) Description() string {
|
||||
return "Read metrics of ZFS from arcstats, zfetchstats and vdev_cache_stats"
|
||||
}
|
||||
|
||||
func getPools(kstatPath string) []poolInfo {
|
||||
pools := make([]poolInfo, 0)
|
||||
poolsDirs, _ := filepath.Glob(kstatPath + "/*/io")
|
||||
|
||||
for _, poolDir := range poolsDirs {
|
||||
poolDirSplit := strings.Split(poolDir, "/")
|
||||
pool := poolDirSplit[len(poolDirSplit)-2]
|
||||
pools = append(pools, poolInfo{name: pool, ioFilename: poolDir})
|
||||
}
|
||||
|
||||
return pools
|
||||
}
|
||||
|
||||
func getTags(pools []poolInfo) map[string]string {
|
||||
var poolNames string
|
||||
|
||||
for _, pool := range pools {
|
||||
if len(poolNames) != 0 {
|
||||
poolNames += "::"
|
||||
}
|
||||
poolNames += pool.name
|
||||
}
|
||||
|
||||
return map[string]string{"pools": poolNames}
|
||||
}
|
||||
|
||||
func gatherPoolStats(pool poolInfo, acc telegraf.Accumulator) error {
|
||||
lines, err := internal.ReadLines(pool.ioFilename)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if len(lines) != 3 {
|
||||
return err
|
||||
}
|
||||
|
||||
keys := strings.Fields(lines[1])
|
||||
values := strings.Fields(lines[2])
|
||||
|
||||
keyCount := len(keys)
|
||||
|
||||
if keyCount != len(values) {
|
||||
return fmt.Errorf("Key and value count don't match Keys:%v Values:%v", keys, values)
|
||||
}
|
||||
|
||||
tag := map[string]string{"pool": pool.name}
|
||||
fields := make(map[string]interface{})
|
||||
for i := 0; i < keyCount; i++ {
|
||||
value, err := strconv.ParseInt(values[i], 10, 64)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
fields[keys[i]] = value
|
||||
}
|
||||
acc.AddFields("zfs_pool", fields, tag)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (z *Zfs) Gather(acc telegraf.Accumulator) error {
|
||||
kstatMetrics := z.KstatMetrics
|
||||
if len(kstatMetrics) == 0 {
|
||||
kstatMetrics = []string{"arcstats", "zfetchstats", "vdev_cache_stats"}
|
||||
}
|
||||
|
||||
kstatPath := z.KstatPath
|
||||
if len(kstatPath) == 0 {
|
||||
kstatPath = "/proc/spl/kstat/zfs"
|
||||
}
|
||||
|
||||
pools := getPools(kstatPath)
|
||||
tags := getTags(pools)
|
||||
|
||||
if z.PoolMetrics {
|
||||
for _, pool := range pools {
|
||||
err := gatherPoolStats(pool, acc)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fields := make(map[string]interface{})
|
||||
for _, metric := range kstatMetrics {
|
||||
lines, err := internal.ReadLines(kstatPath + "/" + metric)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
for i, line := range lines {
|
||||
if i == 0 || i == 1 {
|
||||
continue
|
||||
}
|
||||
if len(line) < 1 {
|
||||
continue
|
||||
}
|
||||
rawData := strings.Split(line, " ")
|
||||
key := metric + "_" + rawData[0]
|
||||
rawValue := rawData[len(rawData)-1]
|
||||
value, _ := strconv.ParseInt(rawValue, 10, 64)
|
||||
fields[key] = value
|
||||
}
|
||||
}
|
||||
acc.AddFields("zfs", fields, tags)
|
||||
return nil
|
||||
}
|
||||
|
||||
func init() {
|
||||
inputs.Add("zfs", func() telegraf.Input {
|
||||
return &Zfs{}
|
||||
})
|
||||
return "Read metrics of ZFS from arcstats, zfetchstats, vdev_cache_stats, and pools"
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,140 @@
|
|||
// +build freebsd
|
||||
|
||||
package zfs
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"os/exec"
|
||||
"strconv"
|
||||
"strings"
|
||||
|
||||
"github.com/influxdata/telegraf"
|
||||
"github.com/influxdata/telegraf/plugins/inputs"
|
||||
)
|
||||
|
||||
func (z *Zfs) gatherPoolStats(acc telegraf.Accumulator) (string, error) {
|
||||
|
||||
lines, err := z.zpool()
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
pools := []string{}
|
||||
for _, line := range lines {
|
||||
col := strings.Split(line, "\t")
|
||||
|
||||
pools = append(pools, col[0])
|
||||
}
|
||||
|
||||
if z.PoolMetrics {
|
||||
for _, line := range lines {
|
||||
col := strings.Split(line, "\t")
|
||||
tags := map[string]string{"pool": col[0], "health": col[8]}
|
||||
fields := map[string]interface{}{}
|
||||
|
||||
size, err := strconv.ParseInt(col[1], 10, 64)
|
||||
if err != nil {
|
||||
return "", fmt.Errorf("Error parsing size: %s", err)
|
||||
}
|
||||
fields["size"] = size
|
||||
|
||||
alloc, err := strconv.ParseInt(col[2], 10, 64)
|
||||
if err != nil {
|
||||
return "", fmt.Errorf("Error parsing allocation: %s", err)
|
||||
}
|
||||
fields["allocated"] = alloc
|
||||
|
||||
free, err := strconv.ParseInt(col[3], 10, 64)
|
||||
if err != nil {
|
||||
return "", fmt.Errorf("Error parsing free: %s", err)
|
||||
}
|
||||
fields["free"] = free
|
||||
|
||||
frag, err := strconv.ParseInt(strings.TrimSuffix(col[5], "%"), 10, 0)
|
||||
if err != nil { // This might be - for RO devs
|
||||
frag = 0
|
||||
}
|
||||
fields["fragmentation"] = frag
|
||||
|
||||
capval, err := strconv.ParseInt(col[6], 10, 0)
|
||||
if err != nil {
|
||||
return "", fmt.Errorf("Error parsing capacity: %s", err)
|
||||
}
|
||||
fields["capacity"] = capval
|
||||
|
||||
dedup, err := strconv.ParseFloat(strings.TrimSuffix(col[7], "x"), 32)
|
||||
if err != nil {
|
||||
return "", fmt.Errorf("Error parsing dedupratio: %s", err)
|
||||
}
|
||||
fields["dedupratio"] = dedup
|
||||
|
||||
acc.AddFields("zfs_pool", fields, tags)
|
||||
}
|
||||
}
|
||||
|
||||
return strings.Join(pools, "::"), nil
|
||||
}
|
||||
|
||||
func (z *Zfs) Gather(acc telegraf.Accumulator) error {
|
||||
kstatMetrics := z.KstatMetrics
|
||||
if len(kstatMetrics) == 0 {
|
||||
kstatMetrics = []string{"arcstats", "zfetchstats", "vdev_cache_stats"}
|
||||
}
|
||||
|
||||
tags := map[string]string{}
|
||||
poolNames, err := z.gatherPoolStats(acc)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
tags["pools"] = poolNames
|
||||
|
||||
fields := make(map[string]interface{})
|
||||
for _, metric := range kstatMetrics {
|
||||
stdout, err := z.sysctl(metric)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
for _, line := range stdout {
|
||||
rawData := strings.Split(line, ": ")
|
||||
key := metric + "_" + strings.Split(rawData[0], ".")[4]
|
||||
value, _ := strconv.ParseInt(rawData[1], 10, 64)
|
||||
fields[key] = value
|
||||
}
|
||||
}
|
||||
acc.AddFields("zfs", fields, tags)
|
||||
return nil
|
||||
}
|
||||
|
||||
func run(command string, args ...string) ([]string, error) {
|
||||
cmd := exec.Command(command, args...)
|
||||
var outbuf, errbuf bytes.Buffer
|
||||
cmd.Stdout = &outbuf
|
||||
cmd.Stderr = &errbuf
|
||||
err := cmd.Run()
|
||||
|
||||
stdout := strings.TrimSpace(outbuf.String())
|
||||
stderr := strings.TrimSpace(errbuf.String())
|
||||
|
||||
if _, ok := err.(*exec.ExitError); ok {
|
||||
return nil, fmt.Errorf("%s error: %s", command, stderr)
|
||||
}
|
||||
return strings.Split(stdout, "\n"), nil
|
||||
}
|
||||
|
||||
func zpool() ([]string, error) {
|
||||
return run("zpool", []string{"list", "-Hp"}...)
|
||||
}
|
||||
|
||||
func sysctl(metric string) ([]string, error) {
|
||||
return run("sysctl", []string{"-q", fmt.Sprintf("kstat.zfs.misc.%s", metric)}...)
|
||||
}
|
||||
|
||||
func init() {
|
||||
inputs.Add("zfs", func() telegraf.Input {
|
||||
return &Zfs{
|
||||
sysctl: sysctl,
|
||||
zpool: zpool,
|
||||
}
|
||||
})
|
||||
}
|
||||
|
|
@ -0,0 +1,148 @@
|
|||
// +build freebsd
|
||||
|
||||
package zfs
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"testing"
|
||||
|
||||
"github.com/influxdata/telegraf/testutil"
|
||||
"github.com/stretchr/testify/require"
|
||||
)
|
||||
|
||||
// $ zpool list -Hp
|
||||
var zpool_output = []string{
|
||||
"freenas-boot 30601641984 2022177280 28579464704 - - 6 1.00x ONLINE -",
|
||||
"red1 8933531975680 1126164848640 7807367127040 - 8% 12 1.83x ONLINE /mnt",
|
||||
"temp1 2989297238016 1626309320704 1362987917312 - 38% 54 1.28x ONLINE /mnt",
|
||||
"temp2 2989297238016 626958278656 2362338959360 - 12% 20 1.00x ONLINE /mnt",
|
||||
}
|
||||
|
||||
func mock_zpool() ([]string, error) {
|
||||
return zpool_output, nil
|
||||
}
|
||||
|
||||
// sysctl -q kstat.zfs.misc.arcstats
|
||||
|
||||
// sysctl -q kstat.zfs.misc.vdev_cache_stats
|
||||
var kstat_vdev_cache_stats_output = []string{
|
||||
"kstat.zfs.misc.vdev_cache_stats.misses: 87789",
|
||||
"kstat.zfs.misc.vdev_cache_stats.hits: 465583",
|
||||
"kstat.zfs.misc.vdev_cache_stats.delegations: 6952",
|
||||
}
|
||||
|
||||
// sysctl -q kstat.zfs.misc.zfetchstats
|
||||
var kstat_zfetchstats_output = []string{
|
||||
"kstat.zfs.misc.zfetchstats.max_streams: 0",
|
||||
"kstat.zfs.misc.zfetchstats.misses: 0",
|
||||
"kstat.zfs.misc.zfetchstats.hits: 0",
|
||||
}
|
||||
|
||||
func mock_sysctl(metric string) ([]string, error) {
|
||||
if metric == "vdev_cache_stats" {
|
||||
return kstat_vdev_cache_stats_output, nil
|
||||
}
|
||||
if metric == "zfetchstats" {
|
||||
return kstat_zfetchstats_output, nil
|
||||
}
|
||||
return []string{}, fmt.Errorf("Invalid arg")
|
||||
}
|
||||
|
||||
func TestZfsPoolMetrics(t *testing.T) {
|
||||
var acc testutil.Accumulator
|
||||
|
||||
z := &Zfs{
|
||||
KstatMetrics: []string{"vdev_cache_stats"},
|
||||
sysctl: mock_sysctl,
|
||||
zpool: mock_zpool,
|
||||
}
|
||||
err := z.Gather(&acc)
|
||||
require.NoError(t, err)
|
||||
|
||||
require.False(t, acc.HasMeasurement("zfs_pool"))
|
||||
acc.Metrics = nil
|
||||
|
||||
z = &Zfs{
|
||||
KstatMetrics: []string{"vdev_cache_stats"},
|
||||
PoolMetrics: true,
|
||||
sysctl: mock_sysctl,
|
||||
zpool: mock_zpool,
|
||||
}
|
||||
err = z.Gather(&acc)
|
||||
require.NoError(t, err)
|
||||
|
||||
//one pool, all metrics
|
||||
tags := map[string]string{
|
||||
"pool": "freenas-boot",
|
||||
"health": "ONLINE",
|
||||
}
|
||||
|
||||
poolMetrics := getFreeNasBootPoolMetrics()
|
||||
|
||||
acc.AssertContainsTaggedFields(t, "zfs_pool", poolMetrics, tags)
|
||||
}
|
||||
|
||||
func TestZfsGeneratesMetrics(t *testing.T) {
|
||||
var acc testutil.Accumulator
|
||||
|
||||
z := &Zfs{
|
||||
KstatMetrics: []string{"vdev_cache_stats"},
|
||||
sysctl: mock_sysctl,
|
||||
zpool: mock_zpool,
|
||||
}
|
||||
err := z.Gather(&acc)
|
||||
require.NoError(t, err)
|
||||
|
||||
//four pool, vdev_cache_stats metrics
|
||||
tags := map[string]string{
|
||||
"pools": "freenas-boot::red1::temp1::temp2",
|
||||
}
|
||||
intMetrics := getKstatMetricsVdevOnly()
|
||||
|
||||
acc.AssertContainsTaggedFields(t, "zfs", intMetrics, tags)
|
||||
|
||||
acc.Metrics = nil
|
||||
|
||||
z = &Zfs{
|
||||
KstatMetrics: []string{"zfetchstats", "vdev_cache_stats"},
|
||||
sysctl: mock_sysctl,
|
||||
zpool: mock_zpool,
|
||||
}
|
||||
err = z.Gather(&acc)
|
||||
require.NoError(t, err)
|
||||
|
||||
//four pool, vdev_cache_stats and zfetchstatus metrics
|
||||
intMetrics = getKstatMetricsVdevAndZfetch()
|
||||
|
||||
acc.AssertContainsTaggedFields(t, "zfs", intMetrics, tags)
|
||||
}
|
||||
|
||||
func getFreeNasBootPoolMetrics() map[string]interface{} {
|
||||
return map[string]interface{}{
|
||||
"allocated": int64(2022177280),
|
||||
"capacity": int64(6),
|
||||
"dedupratio": float64(1),
|
||||
"free": int64(28579464704),
|
||||
"size": int64(30601641984),
|
||||
"fragmentation": int64(0),
|
||||
}
|
||||
}
|
||||
|
||||
func getKstatMetricsVdevOnly() map[string]interface{} {
|
||||
return map[string]interface{}{
|
||||
"vdev_cache_stats_misses": int64(87789),
|
||||
"vdev_cache_stats_hits": int64(465583),
|
||||
"vdev_cache_stats_delegations": int64(6952),
|
||||
}
|
||||
}
|
||||
|
||||
func getKstatMetricsVdevAndZfetch() map[string]interface{} {
|
||||
return map[string]interface{}{
|
||||
"vdev_cache_stats_misses": int64(87789),
|
||||
"vdev_cache_stats_hits": int64(465583),
|
||||
"vdev_cache_stats_delegations": int64(6952),
|
||||
"zfetchstats_max_streams": int64(0),
|
||||
"zfetchstats_misses": int64(0),
|
||||
"zfetchstats_hits": int64(0),
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,131 @@
|
|||
// +build linux
|
||||
|
||||
package zfs
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"path/filepath"
|
||||
"strconv"
|
||||
"strings"
|
||||
|
||||
"github.com/influxdata/telegraf"
|
||||
"github.com/influxdata/telegraf/internal"
|
||||
"github.com/influxdata/telegraf/plugins/inputs"
|
||||
)
|
||||
|
||||
type poolInfo struct {
|
||||
name string
|
||||
ioFilename string
|
||||
}
|
||||
|
||||
func getPools(kstatPath string) []poolInfo {
|
||||
pools := make([]poolInfo, 0)
|
||||
poolsDirs, _ := filepath.Glob(kstatPath + "/*/io")
|
||||
|
||||
for _, poolDir := range poolsDirs {
|
||||
poolDirSplit := strings.Split(poolDir, "/")
|
||||
pool := poolDirSplit[len(poolDirSplit)-2]
|
||||
pools = append(pools, poolInfo{name: pool, ioFilename: poolDir})
|
||||
}
|
||||
|
||||
return pools
|
||||
}
|
||||
|
||||
func getTags(pools []poolInfo) map[string]string {
|
||||
var poolNames string
|
||||
|
||||
for _, pool := range pools {
|
||||
if len(poolNames) != 0 {
|
||||
poolNames += "::"
|
||||
}
|
||||
poolNames += pool.name
|
||||
}
|
||||
|
||||
return map[string]string{"pools": poolNames}
|
||||
}
|
||||
|
||||
func gatherPoolStats(pool poolInfo, acc telegraf.Accumulator) error {
|
||||
lines, err := internal.ReadLines(pool.ioFilename)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if len(lines) != 3 {
|
||||
return err
|
||||
}
|
||||
|
||||
keys := strings.Fields(lines[1])
|
||||
values := strings.Fields(lines[2])
|
||||
|
||||
keyCount := len(keys)
|
||||
|
||||
if keyCount != len(values) {
|
||||
return fmt.Errorf("Key and value count don't match Keys:%v Values:%v", keys, values)
|
||||
}
|
||||
|
||||
tag := map[string]string{"pool": pool.name}
|
||||
fields := make(map[string]interface{})
|
||||
for i := 0; i < keyCount; i++ {
|
||||
value, err := strconv.ParseInt(values[i], 10, 64)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
fields[keys[i]] = value
|
||||
}
|
||||
acc.AddFields("zfs_pool", fields, tag)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (z *Zfs) Gather(acc telegraf.Accumulator) error {
|
||||
kstatMetrics := z.KstatMetrics
|
||||
if len(kstatMetrics) == 0 {
|
||||
kstatMetrics = []string{"arcstats", "zfetchstats", "vdev_cache_stats"}
|
||||
}
|
||||
|
||||
kstatPath := z.KstatPath
|
||||
if len(kstatPath) == 0 {
|
||||
kstatPath = "/proc/spl/kstat/zfs"
|
||||
}
|
||||
|
||||
pools := getPools(kstatPath)
|
||||
tags := getTags(pools)
|
||||
|
||||
if z.PoolMetrics {
|
||||
for _, pool := range pools {
|
||||
err := gatherPoolStats(pool, acc)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fields := make(map[string]interface{})
|
||||
for _, metric := range kstatMetrics {
|
||||
lines, err := internal.ReadLines(kstatPath + "/" + metric)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
for i, line := range lines {
|
||||
if i == 0 || i == 1 {
|
||||
continue
|
||||
}
|
||||
if len(line) < 1 {
|
||||
continue
|
||||
}
|
||||
rawData := strings.Split(line, " ")
|
||||
key := metric + "_" + rawData[0]
|
||||
rawValue := rawData[len(rawData)-1]
|
||||
value, _ := strconv.ParseInt(rawValue, 10, 64)
|
||||
fields[key] = value
|
||||
}
|
||||
}
|
||||
acc.AddFields("zfs", fields, tags)
|
||||
return nil
|
||||
}
|
||||
|
||||
func init() {
|
||||
inputs.Add("zfs", func() telegraf.Input {
|
||||
return &Zfs{}
|
||||
})
|
||||
}
|
||||
|
|
@ -1,3 +1,5 @@
|
|||
// +build linux
|
||||
|
||||
package zfs
|
||||
|
||||
import (
|
||||
Loading…
Reference in New Issue