Update documentation for infiniband plugin

CHANGELOG.md

@@ -9,6 +9,10 @@
 - The `date` processor now uses the UTC timezone when creating its tag.  In
   previous versions the local time was used.
 
+#### New Inputs
+
+- [infiniband](/plugins/inputs/infiniband/README.md) - Contributed by @willfurnell
+
 #### New Outputs
 
 - [warp10](/plugins/outputs/warp10/README.md) - Contributed by @aurrelhebert

README.md

@@ -202,6 +202,7 @@ For documentation on the latest development code see the [documentation index][d
 * [http](./plugins/inputs/http) (generic HTTP plugin, supports using input data formats)
 * [http_response](./plugins/inputs/http_response)
 * [icinga2](./plugins/inputs/icinga2)
+* [infiniband](./plugins/inputs/infiniband)
 * [influxdb](./plugins/inputs/influxdb)
 * [influxdb_listener](./plugins/inputs/influxdb_listener)
 * [internal](./plugins/inputs/internal)

docs/LICENSE_OF_DEPENDENCIES.md

@@ -75,6 +75,7 @@ following works:
 - github.com/mailru/easyjson [MIT License](https://github.com/mailru/easyjson/blob/master/LICENSE)
 - github.com/matttproud/golang_protobuf_extensions [Apache License 2.0](https://github.com/matttproud/golang_protobuf_extensions/blob/master/LICENSE)
 - github.com/mdlayher/apcupsd [MIT License](https://github.com/mdlayher/apcupsd/blob/master/LICENSE.md)
+- github.com/Mellanox/rdmamap [Apache License 2.0](https://github.com/Mellanox/rdmamap/blob/master/LICENSE)
 - github.com/Microsoft/ApplicationInsights-Go [MIT License](https://github.com/Microsoft/ApplicationInsights-Go/blob/master/LICENSE)
 - github.com/Microsoft/go-winio [MIT License](https://github.com/Microsoft/go-winio/blob/master/LICENSE)
 - github.com/miekg/dns [BSD 3-Clause Clear License](https://github.com/miekg/dns/blob/master/LICENSE)

plugins/inputs/infiniband/README.md

@@ -1,29 +1,58 @@
 # InfiniBand Input Plugin
 
-This plugin gathers statistics for all InfiniBand devices and ports on the system. These are the counters that can be found in /sys/class/infiniband/<dev>/port/<port>/counters/
+This plugin gathers statistics for all InfiniBand devices and ports on the
+system. These are the counters that can be found in
+`/sys/class/infiniband/<dev>/port/<port>/counters/`
+
+**Supported Platforms**: Linux
 
 ### Configuration
 
-This section contains the default TOML to configure the plugin.  You can
-generate it using `telegraf --usage infiniband`.
-
 ```toml
 [[inputs.infiniband]]
+  # no configuration
 ```
 
-There are no configuration options for this plugin.
-
 ### Metrics
 
-You can find more information about the counters that are gathered here: 
+Actual metrics depend on the InfiniBand devices, the plugin uses a simple
-https://community.mellanox.com/s/article/understanding-mlx5-linux-counters-and-status-parameters
+mapping from counter -> counter value.
+
+[Information about the counters][counters] collected is provided by Mellanox.
+
+[counters]: https://community.mellanox.com/s/article/understanding-mlx5-linux-counters-and-status-parameters
+
+- infiniband
+  - tags:
+    - device
+    - port
+  - fields:
+    - excessive_buffer_overrun_errors (integer)
+    - link_downed (integer)
+    - link_error_recovery (integer)
+    - local_link_integrity_errors (integer)
+    - multicast_rcv_packets (integer)
+    - multicast_xmit_packets (integer)
+    - port_rcv_constraint_errors (integer)
+    - port_rcv_data (integer)
+    - port_rcv_errors (integer)
+    - port_rcv_packets (integer)
+    - port_rcv_remote_physical_errors (integer)
+    - port_rcv_switch_relay_errors (integer)
+    - port_xmit_constraint_errors (integer)
+    - port_xmit_data (integer)
+    - port_xmit_discards (integer)
+    - port_xmit_packets (integer)
+    - port_xmit_wait (integer)
+    - symbol_error (integer)
+    - unicast_rcv_packets (integer)
+    - unicast_xmit_packets (integer)
+    - VL15_dropped (integer)
 
-There is a simple mapping from counter -> counter value. All counter values are 64 bit integers. A seperate measurement is made for each port.
-Each measurement is tagged with the device and port that it relates to. These are strings.
 
 
 ### Example Output
 
 ```
-infiniband,device=mlx5_0,port=1,VL15_dropped=0i,excessive_buffer_overrun_errors=0i,link_downed=0i,link_error_recovery=0i,local_link_integrity_errors=0i,multicast_rcv_packets=0i,multicast_xmit_packets=0i,port_rcv_constraint_errors=0i,port_rcv_data=237159415345822i,port_rcv_errors=0i,port_rcv_packets=801977655075i,port_rcv_remote_physical_errors=0i,port_rcv_switch_relay_errors=0i,port_xmit_constraint_errors=0i,port_xmit_data=238334949937759i,port_xmit_discards=0i,port_xmit_packets=803162651391i,port_xmit_wait=4294967295i,symbol_error=0i,unicast_rcv_packets=801977655075i,unicast_xmit_packets=803162651391i 1573125558000000000
+infiniband,device=mlx5_0,port=1 VL15_dropped=0i,excessive_buffer_overrun_errors=0i,link_downed=0i,link_error_recovery=0i,local_link_integrity_errors=0i,multicast_rcv_packets=0i,multicast_xmit_packets=0i,port_rcv_constraint_errors=0i,port_rcv_data=237159415345822i,port_rcv_errors=0i,port_rcv_packets=801977655075i,port_rcv_remote_physical_errors=0i,port_rcv_switch_relay_errors=0i,port_xmit_constraint_errors=0i,port_xmit_data=238334949937759i,port_xmit_discards=0i,port_xmit_packets=803162651391i,port_xmit_wait=4294967295i,symbol_error=0i,unicast_rcv_packets=801977655075i,unicast_xmit_packets=803162651391i 1573125558000000000
 ```