Add smart input plugin for collecting S.M.A.R.T. data (#2449)

plugins/inputs/all/all.go

@@ -76,6 +76,7 @@ import (
 	_ "github.com/influxdata/telegraf/plugins/inputs/riak"
 	_ "github.com/influxdata/telegraf/plugins/inputs/salesforce"
 	_ "github.com/influxdata/telegraf/plugins/inputs/sensors"
+	_ "github.com/influxdata/telegraf/plugins/inputs/smart"
 	_ "github.com/influxdata/telegraf/plugins/inputs/snmp"
 	_ "github.com/influxdata/telegraf/plugins/inputs/snmp_legacy"
 	_ "github.com/influxdata/telegraf/plugins/inputs/socket_listener"

plugins/inputs/smart/README.md

@@ -0,0 +1,135 @@
+# Telegraf S.M.A.R.T. plugin
+
+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.
+See smartmontools (https://www.smartmontools.org/).
+
+If no devices are specified, the plugin will scan for SMART devices via the following command:
+
+```
+smartctl --scan
+```
+
+Metrics will be reported from the following `smartctl` command:
+
+```
+smartctl --info --attributes --health -n <nocheck> --format=brief <device>
+```
+
+This plugin supports _smartmontools_ version 5.41 and above, but v. 5.41 and v. 5.42
+might require setting `nocheck`, see the comment in the sample configuration.
+
+To enable SMART on a storage device run:
+
+```
+smartctl -s on <device>
+```
+
+## Measurements
+
+- smart_device:
+
+    * Tags:
+      - `capacity`
+      - `device`
+      - `device_model`
+      - `enabled`
+      - `health`
+      - `serial_no`
+      - `wwn`
+    * Fields:
+      - `exit_status`
+      - `health_ok`
+      - `read_error_rate`
+      - `seek_error`
+      - `temp_c`
+      - `udma_crc_errors`
+
+- smart_attribute:
+
+    * Tags:
+      - `device`
+      - `fail`
+      - `flags`
+      - `id`
+      - `name`
+      - `serial_no`
+      - `wwn`
+    * Fields:
+      - `exit_status`
+      - `raw_value`
+      - `threshold`
+      - `value`
+      - `worst`
+
+### Flags
+
+The interpretation of the tag `flags` is:
+ - *K* auto-keep
+ - *C* event count
+ - *R* error rate
+ - *S* speed/performance
+ - *O* updated online
+ - *P* prefailure warning
+
+### Exit Status
+
+The `exit_status` field captures the exit status of the smartctl command which
+is defined by a bitmask. For the interpretation of the bitmask see the man page for
+smartctl.
+
+### Device Names
+
+Device names, e.g., `/dev/sda`, are *not persistent*, and may be
+subject to change across reboots or system changes. Instead, you can the
+*World Wide Name* (WWN) or serial number to identify devices. On Linux block
+devices can be referenced by the WWN in the following location:
+`/dev/disk/by-id/`.
+
+## Configuration
+
+```toml
+# Read metrics from storage devices supporting S.M.A.R.T.
+[[inputs.smart]]
+  ## Optionally specify the path to the smartctl executable
+  # path = "/usr/bin/smartctl"
+  #
+  ## On most platforms smartctl requires root access.
+  ## Setting 'use_sudo' to true will make use of sudo to run smartctl.
+  ## Sudo must be configured to to allow the telegraf user to run smartctl
+  ## with out password.
+  # use_sudo = false
+  #
+  ## Skip checking disks in this power mode. Defaults to
+  ## "standby" to not wake up disks that have stoped rotating.
+  ## See --nockeck in the man pages for smartctl.
+  ## smartctl version 5.41 and 5.42 have faulty detection of
+  ## power mode and might require changing this value to
+  ## "never" depending on your storage device.
+  # nocheck = "standby"
+  #
+  ## Gather detailed metrics for each SMART Attribute.
+  ## Defaults to "false"
+  ##
+  # attributes = false
+  #
+  ## Optionally specify devices to exclude from reporting.
+  # excludes = [ "/dev/pass6" ]
+  #
+  ## Optionally specify devices and device type, if unset
+  ## a scan (smartctl --scan) for S.M.A.R.T. devices will
+  ## done and all found will be included except for the
+  ## excluded in excludes.
+  # devices = [ "/dev/ada0 -d atacam" ]
+```
+
+To run `smartctl` with `sudo` create a wrapper script and use `path` in
+the configuration to execute that.
+
+## Output
+
+Example output from an _Apple SSD_:
+```
+> smart_attribute,serial_no=S1K5NYCD964433,wwn=5002538655584d30,id=199,name=UDMA_CRC_Error_Count,flags=-O-RC-,fail=-,host=mbpro.local,device=/dev/rdisk0 threshold=0i,raw_value=0i,exit_status=0i,value=200i,worst=200i 1502536854000000000
+> smart_attribute,device=/dev/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
+> smart_device,enabled=Enabled,host=mbpro.local,device=/dev/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
+```