Add IPFIX export doc

Author: jotak

docs/api.md

@@ -331,6 +331,16 @@ Following is the supported API format for writing to standard output:
  stdout:
          format: the format of each line: printf (default - writes using golang's default map printing), fields (writes one key and value field per line) or json
 </pre>
+## Write IPFIX
+Following is the supported API format for writing to an IPFIX collector:
+
+<pre>
+ ipfix:
+         targetHost: IPFIX Collector host target IP
+         targetPort: IPFIX Collector host target port
+         transport: Transport protocol (tcp/udp) to be used for the IPFIX connection
+         enterpriseId: Enterprise ID for exporting transformations
+</pre>
 ## Aggregate metrics API
 Following is the supported API format for specifying metrics aggregations:
 

pkg/api/api.go

@@ -62,6 +62,7 @@ type API struct {
 	TransformNetwork   TransformNetwork  `yaml:"network" doc:"## Transform Network API\nFollowing is the supported API format for network transformations:\n"`
 	WriteLoki          WriteLoki         `yaml:"loki" doc:"## Write Loki API\nFollowing is the supported API format for writing to loki:\n"`
 	WriteStdout        WriteStdout       `yaml:"stdout" doc:"## Write Standard Output\nFollowing is the supported API format for writing to standard output:\n"`
+	WriteIPFIX         WriteIpfix        `yaml:"ipfix" doc:"## Write IPFIX\nFollowing is the supported API format for writing to an IPFIX collector:\n"`
 	ExtractAggregate   Aggregates        `yaml:"aggregates" doc:"## Aggregate metrics API\nFollowing is the supported API format for specifying metrics aggregations:\n"`
 	ConnectionTracking ConnTrack         `yaml:"conntrack" doc:"## Connection tracking API\nFollowing is the supported API format for specifying connection tracking:\n"`
 	ExtractTimebased   ExtractTimebased  `yaml:"timebased" doc:"## Time-based Filters API\nFollowing is the supported API format for specifying metrics time-based filters:\n"`