Add omitempty flag to stage config

pkg/api/conn_track.go

@@ -19,9 +19,9 @@ package api
 
 type ConnTrack struct {
 	// TODO: should by a pointer instead?
-	KeyDefinition     KeyDefinition `yaml:"keyDefinition" doc:"fields that are used to identify the connection"`
-	OutputRecordTypes []string      `yaml:"outputRecordTypes" enum:"ConnTrackOutputRecordTypeEnum" doc:"output record types to emit"`
-	OutputFields      []OutputField `yaml:"outputFields" doc:"list of output fields"`
+	KeyDefinition     KeyDefinition `yaml:"keyDefinition,omitempty" doc:"fields that are used to identify the connection"`
+	OutputRecordTypes []string      `yaml:"outputRecordTypes,omitempty" enum:"ConnTrackOutputRecordTypeEnum" doc:"output record types to emit"`
+	OutputFields      []OutputField `yaml:"outputFields,omitempty" doc:"list of output fields"`
 }
 
 type ConnTrackOutputRecordTypeEnum struct {
@@ -34,12 +34,12 @@ func ConnTrackOutputRecordTypeName(operation string) string {
 }
 
 type KeyDefinition struct {
-	FieldGroups []FieldGroup  `yaml:"fieldGroups" doc:"list of field group definitions"`
-	Hash        ConnTrackHash `yaml:"hash" doc:"how to build the connection hash"`
+	FieldGroups []FieldGroup  `yaml:"fieldGroups,omitempty" doc:"list of field group definitions"`
+	Hash        ConnTrackHash `yaml:"hash,omitempty" doc:"how to build the connection hash"`
 }
 
 type FieldGroup struct {
-	Name   string   `yaml:"name" doc:"field group name"`
+	Name   string   `yaml:"name,omitempty" doc:"field group name"`
 	Fields []string `yaml:"fields" doc:"list of fields in the group"`
 }
 
@@ -50,16 +50,16 @@ type FieldGroup struct {
 // When they are not set, a different hash will be computed for A->B and B->A,
 // and they are tracked as different connections.
 type ConnTrackHash struct {
-	FieldGroupRefs []string `yaml:"fieldGroupRefs" doc:"list of field group names to build the hash"`
-	FieldGroupARef string   `yaml:"fieldGroupARef" doc:"field group name of endpoint A"`
-	FieldGroupBRef string   `yaml:"fieldGroupBRef" doc:"field group name of endpoint B"`
+	FieldGroupRefs []string `yaml:"fieldGroupRefs,omitempty" doc:"list of field group names to build the hash"`
+	FieldGroupARef string   `yaml:"fieldGroupARef,omitempty" doc:"field group name of endpoint A"`
+	FieldGroupBRef string   `yaml:"fieldGroupBRef,omitempty" doc:"field group name of endpoint B"`
 }
 
 type OutputField struct {
-	Name      string `yaml:"name" doc:"output field name"`
-	Operation string `yaml:"operation" enum:"ConnTrackOperationEnum" doc:"aggregate operation on the field value"`
-	SplitAB   bool   `yaml:"splitAB" doc:"When true, 2 output fields will be created. One for A->B and one for B->A flows."`
-	Input     string `yaml:"input" doc:"The input field to base the operation on. When omitted, 'name' is used"`
+	Name      string `yaml:"name,omitempty" doc:"output field name"`
+	Operation string `yaml:"operation,omitempty" enum:"ConnTrackOperationEnum" doc:"aggregate operation on the field value"`
+	SplitAB   bool   `yaml:"splitAB,omitempty" doc:"When true, 2 output fields will be created. One for A->B and one for B->A flows."`
+	Input     string `yaml:"input,omitempty" doc:"The input field to base the operation on. When omitted, 'name' is used"`
 }
 
 type ConnTrackOperationEnum struct {

pkg/api/decode_aws.go

@@ -18,5 +18,5 @@
 package api
 
 type DecodeAws struct {
-	Fields []string `yaml:"fields" json:"fields" doc:"list of aws flow log fields"`
+	Fields []string `yaml:"fields,omitempty" json:"fields" doc:"list of aws flow log fields"`
 }

pkg/api/encode_kafka.go

@@ -20,11 +20,11 @@ package api
 type EncodeKafka struct {
 	Address      string `yaml:"address" json:"address" doc:"address of kafka server"`
 	Topic        string `yaml:"topic" json:"topic" doc:"kafka topic to write to"`
-	Balancer     string `yaml:"balancer" json:"balancer" enum:"KafkaEncodeBalancerEnum" doc:"one of the following:"`
-	WriteTimeout int64  `yaml:"writeTimeout" json:"writeTimeout" doc:"timeout (in seconds) for write operation performed by the Writer"`
-	ReadTimeout  int64  `yaml:"readTimeout" json:"readTimeout" doc:"timeout (in seconds) for read operation performed by the Writer"`
-	BatchBytes   int64  `yaml:"batchBytes" json:"batchBytes" doc:"limit the maximum size of a request in bytes before being sent to a partition"`
-	BatchSize    int    `yaml:"batchSize" json:"batchSize" doc:"limit on how many messages will be buffered before being sent to a partition"`
+	Balancer     string `yaml:"balancer,omitempty" json:"balancer,omitempty" enum:"KafkaEncodeBalancerEnum" doc:"one of the following:"`
+	WriteTimeout int64  `yaml:"writeTimeout,omitempty" json:"writeTimeout,omitempty" doc:"timeout (in seconds) for write operation performed by the Writer"`
+	ReadTimeout  int64  `yaml:"readTimeout,omitempty" json:"readTimeout,omitempty" doc:"timeout (in seconds) for read operation performed by the Writer"`
+	BatchBytes   int64  `yaml:"batchBytes,omitempty" json:"batchBytes,omitempty" doc:"limit the maximum size of a request in bytes before being sent to a partition"`
+	BatchSize    int    `yaml:"batchSize,omitempty" json:"batchSize,omitempty" doc:"limit on how many messages will be buffered before being sent to a partition"`
 }
 
 type KafkaEncodeBalancerEnum struct {

pkg/api/encode_prom.go

@@ -18,10 +18,10 @@
 package api
 
 type PromEncode struct {
-	Metrics    PromMetricsItems `yaml:"metrics" json:"metrics" doc:"list of prometheus metric definitions, each includes:"`
-	Port       int              `yaml:"port" json:"port" doc:"port number to expose \"/metrics\" endpoint"`
-	Prefix     string           `yaml:"prefix" json:"prefix" doc:"prefix added to each metric name"`
-	ExpiryTime int              `yaml:"expiryTime" json:"expiryTime" doc:"seconds of no-flow to wait before deleting prometheus data item"`
+	Metrics    PromMetricsItems `yaml:"metrics" json:"metrics,omitempty" doc:"list of prometheus metric definitions, each includes:"`
+	Port       int              `yaml:"port" json:"port,omitempty" doc:"port number to expose \"/metrics\" endpoint"`
+	Prefix     string           `yaml:"prefix" json:"prefix,omitempty" doc:"prefix added to each metric name"`
+	ExpiryTime int              `yaml:"expiryTime" json:"expiryTime,omitempty" doc:"seconds of no-flow to wait before deleting prometheus data item"`
 }
 
 type PromEncodeOperationEnum struct {

pkg/api/extract_aggregate.go

@@ -4,9 +4,9 @@ type AggregateBy []string
 type AggregateOperation string
 
 type AggregateDefinition struct {
-	Name      string             `yaml:"name" json:"name" doc:"description of aggregation result"`
-	By        AggregateBy        `yaml:"by" json:"by" doc:"list of fields on which to aggregate"`
-	Operation AggregateOperation `yaml:"operation" json:"operation" doc:"sum, min, max, avg or raw_values"`
-	RecordKey string             `yaml:"recordKey" json:"recordKey" doc:"internal field on which to perform the operation"`
-	TopK      int                `yaml:"topK" json:"topK" doc:"number of highest incidence to report (default - report all)"`
+	Name      string             `yaml:"name,omitempty" json:"name,omitempty" doc:"description of aggregation result"`
+	By        AggregateBy        `yaml:"by,omitempty" json:"by,omitempty" doc:"list of fields on which to aggregate"`
+	Operation AggregateOperation `yaml:"operation,omitempty" json:"operation,omitempty" doc:"sum, min, max, avg or raw_values"`
+	RecordKey string             `yaml:"recordKey,omitempty" json:"recordKey,omitempty" doc:"internal field on which to perform the operation"`
+	TopK      int                `yaml:"topK,omitempty" json:"topK,omitempty" doc:"number of highest incidence to report (default - report all)"`
 }

pkg/api/ingest_collector.go

@@ -18,8 +18,8 @@
 package api
 
 type IngestCollector struct {
-	HostName    string `yaml:"hostName" json:"hostName" doc:"the hostname to listen on"`
-	Port        int    `yaml:"port" json:"port" doc:"the port number to listen on, for IPFIX/NetFlow v9. Omit or set to 0 to disable IPFIX/NetFlow v9 ingestion"`
-	PortLegacy  int    `yaml:"portLegacy" json:"portLegacy" doc:"the port number to listen on, for legacy NetFlow v5. Omit or set to 0 to disable NetFlow v5 ingestion"`
-	BatchMaxLen int    `yaml:"batchMaxLen" json:"batchMaxLen" doc:"the number of accumulated flows before being forwarded for processing"`
+	HostName    string `yaml:"hostName,omitempty" json:"hostName,omitempty" doc:"the hostname to listen on"`
+	Port        int    `yaml:"port,omitempty" json:"port,omitempty" doc:"the port number to listen on, for IPFIX/NetFlow v9. Omit or set to 0 to disable IPFIX/NetFlow v9 ingestion"`
+	PortLegacy  int    `yaml:"portLegacy,omitempty" json:"portLegacy,omitempty" doc:"the port number to listen on, for legacy NetFlow v5. Omit or set to 0 to disable NetFlow v5 ingestion"`
+	BatchMaxLen int    `yaml:"batchMaxLen,omitempty" json:"batchMaxLen,omitempty" doc:"the number of accumulated flows before being forwarded for processing"`
 }

pkg/api/ingest_grpc.go

@@ -1,6 +1,6 @@
 package api
 
 type IngestGRPCProto struct {
-	Port      int `yaml:"port" json:"port" doc:"the port number to listen on"`
-	BufferLen int `yaml:"bufferLength" json:"bufferLength" doc:"the length of the ingest channel buffer, in groups of flows, containing each group hundreds of flows (default: 100)"`
+	Port      int `yaml:"port,omitempty" json:"port,omitempty" doc:"the port number to listen on"`
+	BufferLen int `yaml:"bufferLength,omitempty" json:"bufferLength,omitempty" doc:"the length of the ingest channel buffer, in groups of flows, containing each group hundreds of flows (default: 100)"`
 }

pkg/api/ingest_kafka.go

@@ -18,10 +18,10 @@
 package api
 
 type IngestKafka struct {
-	Brokers          []string `yaml:"brokers" json:"brokers" doc:"list of kafka broker addresses"`
-	Topic            string   `yaml:"topic" json:"topic" doc:"kafka topic to listen on"`
-	GroupId          string   `yaml:"groupid" json:"groupid" doc:"separate groupid for each consumer on specified topic"`
-	GroupBalancers   []string `yaml:"groupBalancers" json:"groupBalancers" doc:"list of balancing strategies (range, roundRobin, rackAffinity)"`
-	StartOffset      string   `yaml:"startOffset" json:"startOffset" doc:"FirstOffset (least recent - default) or LastOffset (most recent) offset available for a partition"`
-	BatchReadTimeout int64    `yaml:"batchReadTimeout" json:"batchReadTimeout" doc:"how often (in milliseconds) to process input"`
+	Brokers          []string `yaml:"brokers,omitempty" json:"brokers,omitempty" doc:"list of kafka broker addresses"`
+	Topic            string   `yaml:"topic,omitempty" json:"topic,omitempty" doc:"kafka topic to listen on"`
+	GroupId          string   `yaml:"groupid,omitempty" json:"groupid,omitempty" doc:"separate groupid for each consumer on specified topic"`
+	GroupBalancers   []string `yaml:"groupBalancers,omitempty" json:"groupBalancers,omitempty" doc:"list of balancing strategies (range, roundRobin, rackAffinity)"`
+	StartOffset      string   `yaml:"startOffset,omitempty" json:"startOffset,omitempty" doc:"FirstOffset (least recent - default) or LastOffset (most recent) offset available for a partition"`
+	BatchReadTimeout int64    `yaml:"batchReadTimeout,omitempty" json:"batchReadTimeout,omitempty" doc:"how often (in milliseconds) to process input"`
 }

pkg/api/transform_filter.go

@@ -18,7 +18,7 @@
 package api
 
 type TransformFilter struct {
-	Rules []TransformFilterRule `yaml:"rules" json:"rules" doc:"list of filter rules, each includes:"`
+	Rules []TransformFilterRule `yaml:"rules,omitempty" json:"rules,omitempty" doc:"list of filter rules, each includes:"`
 }
 
 type TransformFilterOperationEnum struct {
@@ -32,6 +32,6 @@ func TransformFilterOperationName(operation string) string {
 }
 
 type TransformFilterRule struct {
-	Input string `yaml:"input" json:"input" doc:"entry input field"`
-	Type  string `yaml:"type" json:"type" enum:"TransformFilterOperationEnum" doc:"one of the following:"`
+	Input string `yaml:"input,omitempty" json:"input,omitempty" doc:"entry input field"`
+	Type  string `yaml:"type,omitempty" json:"type,omitempty" enum:"TransformFilterOperationEnum" doc:"one of the following:"`
 }

pkg/api/transform_generic.go

@@ -18,8 +18,8 @@
 package api
 
 type TransformGeneric struct {
-	Policy string                 `yaml:"policy" json:"policy" enum:"TransformGenericOperationEnum" doc:"key replacement policy; may be one of the following:"`
-	Rules  []GenericTransformRule `yaml:"rules" json:"rules" doc:"list of transform rules, each includes:"`
+	Policy string                 `yaml:"policy,omitempty" json:"policy,omitempty" enum:"TransformGenericOperationEnum" doc:"key replacement policy; may be one of the following:"`
+	Rules  []GenericTransformRule `yaml:"rules,omitempty" json:"rules,omitempty" doc:"list of transform rules, each includes:"`
 }
 
 type TransformGenericOperationEnum struct {
@@ -32,8 +32,8 @@ func TransformGenericOperationName(operation string) string {
 }
 
 type GenericTransformRule struct {
-	Input  string `yaml:"input" json:"input" doc:"entry input field"`
-	Output string `yaml:"output" json:"output" doc:"entry output field"`
+	Input  string `yaml:"input,omitempty" json:"input,omitempty" doc:"entry input field"`
+	Output string `yaml:"output,omitempty" json:"output,omitempty" doc:"entry output field"`
 }
 
 type GenericTransform []GenericTransformRule

pkg/api/transform_network.go

@@ -39,9 +39,9 @@ func TransformNetworkOperationName(operation string) string {
 }
 
 type NetworkTransformRule struct {
-	Input      string `yaml:"input" json:"input" doc:"entry input field"`
-	Output     string `yaml:"output" json:"output" doc:"entry output field"`
-	Type       string `yaml:"type" json:"type" enum:"TransformNetworkOperationEnum" doc:"one of the following:"`
+	Input      string `yaml:"input,omitempty" json:"input,omitempty" doc:"entry input field"`
+	Output     string `yaml:"output,omitempty" json:"output,omitempty" doc:"entry output field"`
+	Type       string `yaml:"type,omitempty" json:"type,omitempty" enum:"TransformNetworkOperationEnum" doc:"one of the following:"`
 	Parameters string `yaml:"parameters,omitempty" json:"parameters,omitempty" doc:"parameters specific to type"`
 }
 

pkg/api/write_stdout.go

@@ -1,5 +1,5 @@
 package api
 
 type WriteStdout struct {
-	Format string `yaml:"format" json:"format" doc:"the format of each line: printf (default) or json"`
+	Format string `yaml:"format,omitempty" json:"format,omitempty" doc:"the format of each line: printf (default) or json"`
 }

pkg/config/pipeline_builder_test.go

@@ -49,7 +49,7 @@ func TestLokiPipeline(t *testing.T) {
 
 	b, err = json.Marshal(params[0])
 	require.NoError(t, err)
-	require.Equal(t, `{"name":"ingest","ingest":{"type":"collector","collector":{"hostName":"127.0.0.1","port":9999,"portLegacy":0,"batchMaxLen":0}}}`, string(b))
+	require.Equal(t, `{"name":"ingest","ingest":{"type":"collector","collector":{"hostName":"127.0.0.1","port":9999}}}`, string(b))
 
 	b, err = json.Marshal(params[1])
 	require.NoError(t, err)
@@ -136,15 +136,15 @@ func TestKafkaPromPipeline(t *testing.T) {
 
 	b, err = json.Marshal(params[0])
 	require.NoError(t, err)
-	require.Equal(t, `{"name":"ingest","ingest":{"type":"kafka","kafka":{"brokers":["http://kafka"],"topic":"netflows","groupid":"my-group","groupBalancers":null,"startOffset":"","batchReadTimeout":0}}}`, string(b))
+	require.Equal(t, `{"name":"ingest","ingest":{"type":"kafka","kafka":{"brokers":["http://kafka"],"topic":"netflows","groupid":"my-group"}}}`, string(b))
 
 	b, err = json.Marshal(params[1])
 	require.NoError(t, err)
 	require.Equal(t, `{"name":"filter","transform":{"type":"filter","filter":{"rules":[{"input":"doesnt_exist","type":"remove_entry_if_doesnt_exist"}]}}}`, string(b))
 
 	b, err = json.Marshal(params[2])
 	require.NoError(t, err)
-	require.Equal(t, `{"name":"aggregate","extract":{"type":"aggregates","aggregates":[{"name":"src_as_connection_count","by":["srcAS"],"operation":"count","recordKey":"","topK":0}]}}`, string(b))
+	require.Equal(t, `{"name":"aggregate","extract":{"type":"aggregates","aggregates":[{"name":"src_as_connection_count","by":["srcAS"],"operation":"count"}]}}`, string(b))
 
 	b, err = json.Marshal(params[3])
 	require.NoError(t, err)
@@ -167,13 +167,13 @@ func TestForkPipeline(t *testing.T) {
 
 	b, err = json.Marshal(params[0])
 	require.NoError(t, err)
-	require.Equal(t, `{"name":"ingest","ingest":{"type":"collector","collector":{"hostName":"127.0.0.1","port":9999,"portLegacy":0,"batchMaxLen":0}}}`, string(b))
+	require.Equal(t, `{"name":"ingest","ingest":{"type":"collector","collector":{"hostName":"127.0.0.1","port":9999}}}`, string(b))
 
 	b, err = json.Marshal(params[1])
 	require.NoError(t, err)
 	require.Equal(t, `{"name":"loki","write":{"type":"loki","loki":{"url":"http://loki:3100/","batchWait":"1s","batchSize":102400,"timeout":"10s","minBackoff":"1s","maxBackoff":"5m","maxRetries":10,"timestampLabel":"TimeReceived","timestampScale":"1s"}}}`, string(b))
 
 	b, err = json.Marshal(params[2])
 	require.NoError(t, err)
-	require.Equal(t, `{"name":"stdout","write":{"type":"stdout","stdout":{"format":""}}}`, string(b))
+	require.Equal(t, `{"name":"stdout","write":{"type":"stdout","stdout":{}}}`, string(b))
 }