Couchbase input plugin

plugins/inputs/couchbase/README.md

@@ -0,0 +1,46 @@
+# Telegraf Plugin: Couchbase
+
+### Configuration:
+
+```
+# Read per-node and per-bucket metrics from Couchbase
+[[inputs.couchbase]]
+  ## specify servers via a url matching:
+  ##  [protocol://][:password]@address[:port]
+  ##  e.g.
+  ##    http://couchbase-0.example.com/
+  ##    http://admin:secret@couchbase-0.example.com:8091/
+  ##
+  ## If no servers are specified, then localhost is used as the host.
+  ## If no protocol is specifed, HTTP is used.
+  ## If no port is specified, 8091 is used.
+  servers = ["http://localhost:8091"]
+```
+
+## Measurements:
+
+### Per-node measurements
+
+Meta:
+- units: bytes
+- tags: `cluster`, `hostname`
+
+Measurement names:
+- memory_free
+- memory_total
+
+### Per-bucket measurements
+
+Meta:
+- units: varies
+- tags: `cluster`, `bucket`
+
+Measurement names:
+- quotaPercentUsed (unit: percent)
+- opsPerSec (unit: count)
+- diskFetches (unit: count)
+- itemCount (unit: count)
+- diskUsed (unit: bytes)
+- dataUsed (unit: bytes)
+- memUsed (unit: bytes)
+