136 lines
4.3 KiB
Markdown
136 lines
4.3 KiB
Markdown
# Telegraf S.M.A.R.T. plugin
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Get metrics using the command line utility `smartctl` for S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) storage devices. SMART is a monitoring system included in computer hard disk drives (HDDs) and solid-state drives (SSDs)[1] that detects and reports on various indicators of drive reliability, with the intent of enabling the anticipation of hardware failures.
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See smartmontools (https://www.smartmontools.org/).
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If no devices are specified, the plugin will scan for SMART devices via the following command:
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```
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smartctl --scan
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```
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Metrics will be reported from the following `smartctl` command:
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```
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smartctl --info --attributes --health -n <nocheck> --format=brief <device>
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```
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This plugin supports _smartmontools_ version 5.41 and above, but v. 5.41 and v. 5.42
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might require setting `nocheck`, see the comment in the sample configuration.
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To enable SMART on a storage device run:
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```
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smartctl -s on <device>
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```
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## Measurements
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- smart_device:
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* Tags:
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- `capacity`
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- `device`
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- `device_model`
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- `enabled`
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- `health`
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- `serial_no`
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- `wwn`
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* Fields:
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- `exit_status`
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- `health_ok`
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- `read_error_rate`
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- `seek_error`
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- `temp_c`
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- `udma_crc_errors`
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- smart_attribute:
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* Tags:
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- `device`
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- `fail`
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- `flags`
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- `id`
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- `name`
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- `serial_no`
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- `wwn`
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* Fields:
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- `exit_status`
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- `raw_value`
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- `threshold`
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- `value`
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- `worst`
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### Flags
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The interpretation of the tag `flags` is:
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- *K* auto-keep
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- *C* event count
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- *R* error rate
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- *S* speed/performance
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- *O* updated online
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- *P* prefailure warning
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### Exit Status
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The `exit_status` field captures the exit status of the smartctl command which
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is defined by a bitmask. For the interpretation of the bitmask see the man page for
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smartctl.
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### Device Names
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Device names, e.g., `/dev/sda`, are *not persistent*, and may be
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subject to change across reboots or system changes. Instead, you can the
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*World Wide Name* (WWN) or serial number to identify devices. On Linux block
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devices can be referenced by the WWN in the following location:
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`/dev/disk/by-id/`.
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## Configuration
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```toml
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# Read metrics from storage devices supporting S.M.A.R.T.
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[[inputs.smart]]
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## Optionally specify the path to the smartctl executable
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# path = "/usr/bin/smartctl"
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#
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## On most platforms smartctl requires root access.
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## Setting 'use_sudo' to true will make use of sudo to run smartctl.
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## Sudo must be configured to to allow the telegraf user to run smartctl
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## with out password.
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# use_sudo = false
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#
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## Skip checking disks in this power mode. Defaults to
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## "standby" to not wake up disks that have stoped rotating.
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## See --nockeck in the man pages for smartctl.
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## smartctl version 5.41 and 5.42 have faulty detection of
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## power mode and might require changing this value to
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## "never" depending on your storage device.
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# nocheck = "standby"
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#
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## Gather detailed metrics for each SMART Attribute.
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## Defaults to "false"
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##
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# attributes = false
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#
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## Optionally specify devices to exclude from reporting.
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# excludes = [ "/dev/pass6" ]
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#
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## Optionally specify devices and device type, if unset
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## a scan (smartctl --scan) for S.M.A.R.T. devices will
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## done and all found will be included except for the
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## excluded in excludes.
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# devices = [ "/dev/ada0 -d atacam" ]
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```
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To run `smartctl` with `sudo` create a wrapper script and use `path` in
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the configuration to execute that.
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## Output
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Example output from an _Apple SSD_:
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```
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> smart_attribute,serial_no=S1K5NYCD964433,wwn=5002538655584d30,id=199,name=UDMA_CRC_Error_Count,flags=-O-RC-,fail=-,host=mbpro.local,device=rdisk0 threshold=0i,raw_value=0i,exit_status=0i,value=200i,worst=200i 1502536854000000000
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> smart_attribute,device=rdisk0,serial_no=S1K5NYCD964433,wwn=5002538655584d30,id=240,name=Unknown_SSD_Attribute,flags=-O---K,fail=-,host=mbpro.local exit_status=0i,value=100i,worst=100i,threshold=0i,raw_value=0i 1502536854000000000
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> smart_device,enabled=Enabled,host=mbpro.local,device=rdisk0,model=APPLE\ SSD\ SM0512F,serial_no=S1K5NYCD964433,wwn=5002538655584d30,capacity=500277790720 udma_crc_errors=0i,exit_status=0i,health_ok=true,read_error_rate=0i,temp_c=40i 1502536854000000000
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```
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