nfsclient

Illumos NFS Client Input Plugin

Gathers kstat metrics relating to an Illumos system's NFS client traffic. It works with any supported NFS protocol version.

The kstat values are reported "raw": that is crtime and snaptime are not used to calculate differentials. Your graphing software should calculate rates, but they will not be as accurate as if they were calculated from the high-resolution kstat times.

Each zone keeps its own NFS kstats. There's no (simple) way for the global zone to see the NFS kstats of an NGZ, so if you care about those, you'll have to run a dedicated Telegraf in the zone(s).

Telegraf minimum version: Telegraf 1.18 Plugin minimum tested version: 1.18

Configuration

	## The NFS versions you wish to monitor.
	#NfsVersions = ["v3", "v4"]
	## The kstat fields you wish to emit. 'kstat -p -m nfs -i 0 | grep rfs' lists the possibilities
	#Fields = ["read", "write", "remove", "create", "getattr", "setattr"]

Omitting Fields entirely results in all metrics being sent.

Metrics

• nfs.client
  • tags:
    • nfsVersion (NFS protocol major version, e.g. "v4")
  • fields:
    • read (uint64)
    • ...

The final field of any nfs:0:rfs* kstat is a valid field.

Sample Queries

The following queries are written in The Wavefront Query Language.

rate(ts("dev.telegraf.nfs.client.write", nfsVersion="v4")) # write ops for NFSv4
rate(ts("dev.telegraf.nfs.client.read")) # all reads

Example Output

> nfs.client,host=cube,nfsVersion=v3 create=0i,getattr=122i,read=194816i,remove=0i,setattr=0i,write=0i 1618958834000000000
> nfs.client,host=cube,nfsVersion=v4 create=291i,getattr=34952i,read=10793i,remove=1930i,setattr=854i,write=987i 1618958834000000000