# Lustre Input Plugin

This plugin gathers metrics for the [Lustre® file system][lustre] using its
entries in the `proc` filesystem. Reference the
[Lustre Monitoring and Statistics Guide][guide] for the reported information.

> [!NOTE] This plugin doesn't report _all_ information available but only a
> limited set of items. Check the [metrics section](#metrics).

⭐ Telegraf v0.1.5
🏷️ system
💻 linux

[lustre]: http://lustre.org/
[guide]: http://wiki.lustre.org/Lustre_Monitoring_and_Statistics_Guide

## Global configuration options <!-- @/docs/includes/plugin_config.md -->

Plugins support additional global and plugin configuration settings for tasks
such as modifying metrics, tags, and fields, creating aliases, and configuring
plugin ordering. See [CONFIGURATION.md][CONFIGURATION.md] for more details.

[CONFIGURATION.md]: ../../../docs/CONFIGURATION.md#plugins

## Configuration

```toml @sample.conf
# Read metrics from local Lustre service on OST, MDS
# This plugin ONLY supports Linux
[[inputs.lustre2]]
  ## An array of /proc globs to search for Lustre stats
  ## If not specified, the default will work on Lustre 2.12.x
  ##
  # mgs_procfiles = [
  #   "/sys/fs/lustre/mgs/*/eviction_count",
  # ]
  # ost_procfiles = [
  #   "/proc/fs/lustre/obdfilter/*/stats",
  #   "/proc/fs/lustre/osd-ldiskfs/*/stats",
  #   "/proc/fs/lustre/obdfilter/*/job_stats",
  #   "/proc/fs/lustre/obdfilter/*/exports/*/stats",
  #   "/proc/fs/lustre/osd-ldiskfs/*/brw_stats",
  #   "/proc/fs/lustre/osd-zfs/*/brw_stats",
  #   "/sys/fs/lustre/odbfilter/*/eviction_count",
  # ]
  # mds_procfiles = [
  #   "/proc/fs/lustre/mdt/*/md_stats",
  #   "/proc/fs/lustre/mdt/*/job_stats",
  #   "/proc/fs/lustre/mdt/*/exports/*/stats",
  #   "/proc/fs/lustre/osd-ldiskfs/*/brw_stats",
  #   "/proc/fs/lustre/osd-zfs/*/brw_stats",
  #   "/sys/fs/lustre/mdt/*/eviction_count",
  # ]
```

## Metrics

From `/sys/fs/lustre/health_check`:

- lustre2
  - tags:
  - fields:
    - health

From `/proc/fs/lustre/obdfilter/*/stats` and
`/proc/fs/lustre/osd-ldiskfs/*/stats`:

- lustre2
  - tags:
    - name
  - fields:
    - write_bytes
    - write_calls
    - read_bytes
    - read_calls
    - cache_hit (samples, retained for backward compatibility)
    - cache_hit_samples
    - cache_hit_pages
    - cache_miss (samples, retained for backward compatibility)
    - cache_miss_samples
    - cache_miss_pages
    - cache_access (samples, retained for backward compatibility)
    - cache_access_samples
    - cache_access_pages

From `/proc/fs/lustre/obdfilter/*/exports/*/stats`:

- lustre2
  - tags:
    - name
    - client
  - fields:
    - write_bytes
    - write_calls
    - read_bytes
    - read_calls

From `/proc/fs/lustre/obdfilter/*/job_stats`:

- lustre2
  - tags:
    - name
    - jobid
  - fields:
    - jobstats_ost_getattr
    - jobstats_ost_setattr
    - jobstats_ost_sync
    - jobstats_punch
    - jobstats_destroy
    - jobstats_create
    - jobstats_ost_statfs
    - jobstats_get_info
    - jobstats_set_info
    - jobstats_quotactl
    - jobstats_read_bytes
    - jobstats_read_calls
    - jobstats_read_max_size
    - jobstats_read_min_size
    - jobstats_write_bytes
    - jobstats_write_calls
    - jobstats_write_max_size
    - jobstats_write_min_size

From `/proc/fs/lustre/mdt/*/md_stats`:

- lustre2
  - tags:
    - name
  - fields:
    - open
    - close
    - mknod
    - link
    - unlink
    - mkdir
    - rmdir
    - rename
    - getattr
    - setattr
    - getxattr
    - setxattr
    - statfs
    - sync
    - samedir_rename
    - crossdir_rename

From `/proc/fs/lustre/mdt/*/exports/*/stats`:

- lustre2
  - tags:
    - name
    - client
  - fields:
    - open
    - close
    - mknod
    - link
    - unlink
    - mkdir
    - rmdir
    - rename
    - getattr
    - setattr
    - getxattr
    - setxattr
    - statfs
    - sync
    - samedir_rename
    - crossdir_rename

From `/proc/fs/lustre/mdt/*/job_stats`:

- lustre2
  - tags:
    - name
    - jobid
  - fields:
    - jobstats_close
    - jobstats_crossdir_rename
    - jobstats_getattr
    - jobstats_getxattr
    - jobstats_link
    - jobstats_mkdir
    - jobstats_mknod
    - jobstats_open
    - jobstats_rename
    - jobstats_rmdir
    - jobstats_samedir_rename
    - jobstats_setattr
    - jobstats_setxattr
    - jobstats_statfs
    - jobstats_sync
    - jobstats_unlink

From `/proc/fs/lustre/*/*/eviction_count`:

- lustre2
  - tags:
    - name
  - fields:
    - evictions

## Example Output

```text
lustre2,host=oss2,jobid=42990218,name=wrk-OST0041 jobstats_ost_setattr=0i,jobstats_ost_sync=0i,jobstats_punch=0i,jobstats_read_bytes=4096i,jobstats_read_calls=1i,jobstats_read_max_size=4096i,jobstats_read_min_size=4096i,jobstats_write_bytes=310206488i,jobstats_write_calls=7423i,jobstats_write_max_size=53048i,jobstats_write_min_size=8820i 1556525847000000000
lustre2,host=mds1,jobid=42992017,name=wrk-MDT0000 jobstats_close=31798i,jobstats_crossdir_rename=0i,jobstats_getattr=34146i,jobstats_getxattr=15i,jobstats_link=0i,jobstats_mkdir=658i,jobstats_mknod=0i,jobstats_open=31797i,jobstats_rename=0i,jobstats_rmdir=0i,jobstats_samedir_rename=0i,jobstats_setattr=1788i,jobstats_setxattr=0i,jobstats_statfs=0i,jobstats_sync=0i,jobstats_unlink=0i 1556525828000000000
```
