Add log_key to kinesis plugin (#40)

* Add log_key to kinesis plugin

README.md

@@ -13,6 +13,7 @@ If you think you’ve found a potential security issue, please do not post it in
 * `stream`: The name of the Kinesis Data Stream that you want log records sent to.
 * `partition_key`: A partition key is used to group data by shard within a stream. A Kinesis Data Stream uses the partition key that is associated with each data record to determine which shard a given data record belongs to. For example, if your logs come from Docker containers, you can use container_id as the partition key, and the logs will be grouped and stored on different shards depending upon the id of the container they were generated from. As the data within a shard are coarsely ordered, you will get all your logs from one container in one shard roughly in order. If you don't set a partition key or put an invalid one, a random key will be generated, and the logs will be directed to random shards. If the partition key is invalid, the plugin will print an warning message.
 * `data_keys`: By default, the whole log record will be sent to Kinesis. If you specify key name(s) with this option, then only those keys and values will be sent to Kinesis. For example, if you are using the Fluentd Docker log driver, you can specify `data_keys log` and only the log message will be sent to Kinesis. If you specify multiple keys, they should be comma delimited.
+* `log_key`: By default, the whole log record will be sent to Kinesis. If you specify a key name with this option, then only the value of that key will be sent to Kinesis. For example, if you are using the Fluentd Docker log driver, you can specify `log_key log` and only the log message will be sent to Kinesis.
 * `role_arn`: ARN of an IAM role to assume (for cross account access).
 * `endpoint`: Specify a custom endpoint for the Kinesis Streams API.
 * `sts_endpoint`: Specify a custom endpoint for the STS API; used to assume your custom role provided with `role_arn`.

fluent-bit-kinesis.go

@@ -81,6 +81,8 @@ func newKinesisOutput(ctx unsafe.Pointer, pluginID int) (*kinesis.OutputPlugin,
 	logrus.Infof("[firehose %d] plugin parameter experimental_concurrency = '%s'\n", pluginID, concurrency)
 	concurrencyRetries := output.FLBPluginConfigKey(ctx, "experimental_concurrency_retries")
 	logrus.Infof("[firehose %d] plugin parameter experimental_concurrency_retries = '%s'\n", pluginID, concurrencyRetries)
+	logKey := output.FLBPluginConfigKey(ctx, "log_key")
+	logrus.Infof("[firehose %d] plugin parameter log_key = '%s'\n", pluginID, logKey)
 
 	if stream == "" || region == "" {
 		return nil, fmt.Errorf("[kinesis %d] stream and region are required configuration parameters", pluginID)
@@ -132,7 +134,7 @@ func newKinesisOutput(ctx unsafe.Pointer, pluginID int) (*kinesis.OutputPlugin,
 		concurrencyRetriesInt = defaultConcurrentRetries
 	}
 
-	return kinesis.NewOutputPlugin(region, stream, dataKeys, partitionKey, roleARN, kinesisEndpoint, stsEndpoint, timeKey, timeKeyFmt, concurrencyInt, concurrencyRetriesInt, appendNL, pluginID)
+	return kinesis.NewOutputPlugin(region, stream, dataKeys, partitionKey, roleARN, kinesisEndpoint, stsEndpoint, timeKey, timeKeyFmt, logKey, concurrencyInt, concurrencyRetriesInt, appendNL, pluginID)
 }
 
 // The "export" comments have syntactic meaning

go.mod

@@ -3,12 +3,24 @@ module github.com/aws/amazon-kinesis-streams-for-fluent-bit
 go 1.12
 
 require (
-	github.com/aws/amazon-kinesis-firehose-for-fluent-bit v1.0.1-0.20191203194629-8f64e9241296
-	github.com/aws/aws-sdk-go v1.33.8
-	github.com/fluent/fluent-bit-go v0.0.0-20190925192703-ea13c021720c
+	github.com/aws/amazon-kinesis-firehose-for-fluent-bit v1.2.2-0.20200717080229-e3ffb88e79bb
+	github.com/aws/aws-sdk-go v1.33.6
+	github.com/cenkalti/backoff v2.2.1+incompatible // indirect
+	github.com/fluent/fluent-bit-go v0.0.0-20200707230002-2a28684e2382
 	github.com/golang/mock v1.4.3
+	github.com/google/gofuzz v1.1.0 // indirect
 	github.com/json-iterator/go v1.1.10
 	github.com/lestrrat-go/strftime v1.0.2-0.20200618102204-1b0bc59fa4ab
 	github.com/sirupsen/logrus v1.6.0
+	github.com/stretchr/objx v0.3.0 // indirect
 	github.com/stretchr/testify v1.6.1
+	github.com/yuin/goldmark v1.1.33 // indirect
+	golang.org/x/crypto v0.0.0-20200709230013-948cd5f35899 // indirect
+	golang.org/x/net v0.0.0-20200707034311-ab3426394381 // indirect
+	golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae // indirect
+	golang.org/x/text v0.3.3 // indirect
+	golang.org/x/tools v0.0.0-20200717024301-6ddee64345a6 // indirect
+	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
+	gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 // indirect
+	rsc.io/sampler v1.99.99 // indirect
 )

go.sum

@@ -1,24 +1,30 @@
 github.com/aws/amazon-kinesis-firehose-for-fluent-bit v1.0.1-0.20191203194629-8f64e9241296 h1:6ynrEUDviRKRq0ovA7vEXT0Ti3KAoUMeJoh1L345rKo=
 github.com/aws/amazon-kinesis-firehose-for-fluent-bit v1.0.1-0.20191203194629-8f64e9241296/go.mod h1:Y0/MA0/A1/eRrr1h+1kcdt95B+pyWqAzuTnHfdYIQ00=
+github.com/aws/amazon-kinesis-firehose-for-fluent-bit v1.2.2-0.20200717080229-e3ffb88e79bb h1:397PRrNBqYwMKmqF9n0ZJ+2KZ4dxraC3PxWRUFHYfks=
+github.com/aws/amazon-kinesis-firehose-for-fluent-bit v1.2.2-0.20200717080229-e3ffb88e79bb/go.mod h1:99F+OsNa5DNC0TuaAGs5qh+bn2Jezv1LashyJltaQLM=
 github.com/aws/aws-sdk-go v1.25.43/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.25.47 h1:Y13LHLosjP35FPWae95teJC4eQH2YeKD0I0dVFZ4CUM=
 github.com/aws/aws-sdk-go v1.25.47/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/aws/aws-sdk-go v1.33.8 h1:2/sOfb9oPHTRZ0lxinoaTPDcYwNa1H/SpKP4nVRBwmg=
-github.com/aws/aws-sdk-go v1.33.8/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
+github.com/aws/aws-sdk-go v1.33.6 h1:YLoUeMSx05kHwhS+HLDSpdYYpPzJMyp6hn1cWsJ6a+U=
+github.com/aws/aws-sdk-go v1.33.6/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
 github.com/cenkalti/backoff v2.1.1+incompatible h1:tKJnvO2kl0zmb/jA5UKAt4VoEVw1qxKWjE/Bpp46npY=
 github.com/cenkalti/backoff v2.1.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
+github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/fluent/fluent-bit-go v0.0.0-20190614024040-c017a8579953/go.mod h1:WQX+afhrekY9rGK+WT4xvKSlzmia9gDoLYu4GGYGASQ=
 github.com/fluent/fluent-bit-go v0.0.0-20190925192703-ea13c021720c h1:QwbffUs/+ptC4kTFPEN9Ej2latTq3bZJ5HO/OwPXYMs=
 github.com/fluent/fluent-bit-go v0.0.0-20190925192703-ea13c021720c/go.mod h1:WQX+afhrekY9rGK+WT4xvKSlzmia9gDoLYu4GGYGASQ=
+github.com/fluent/fluent-bit-go v0.0.0-20200707230002-2a28684e2382 h1:gV8vs5nuIWEbCn/EnHa8/2VEbFcGpchUhqftnxHSOrI=
+github.com/fluent/fluent-bit-go v0.0.0-20200707230002-2a28684e2382/go.mod h1:L92h+dgwElEyUuShEwjbiHjseW410WIcNz+Bjutc8YQ=
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 github.com/golang/mock v1.4.3 h1:GV+pQPG/EUUbkh47niozDcADz6go/dUwhVzdUQHIVRw=
 github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/google/gofuzz v1.1.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af h1:pmfjZENx5imkbgOkpRUYLnmbU7UEFbjtDA2hxJ1ichM=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
 github.com/jmespath/go-jmespath v0.3.0 h1:OS12ieG61fsCg5+qLJ+SsW9NicxNkg3b25OyT2yCeUc=
@@ -30,7 +36,6 @@ github.com/json-iterator/go v1.1.10 h1:Kz6Cvnvv2wGdaG/V8yMvfkmNiXq9Ya2KUv4rouJJr
 github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
-github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/lestrrat-go/envload v0.0.0-20180220234015-a3eb8ddeffcc h1:RKf14vYWi2ttpEmkA4aQ3j4u9dStX2t4M8UM6qqNsG8=
 github.com/lestrrat-go/envload v0.0.0-20180220234015-a3eb8ddeffcc/go.mod h1:kopuH9ugFRkIXf3YoqHKyrJ9YfUFsckUU9S7B+XP+is=
@@ -46,6 +51,7 @@ github.com/modern-go/reflect2 v1.0.1 h1:9f412s+6RmYXLWZSEzVVgPGK7C2PphHj5RJrvfx9
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
@@ -56,6 +62,7 @@ github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrf
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1 h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.3.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
@@ -64,23 +71,53 @@ github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd
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+github.com/ugorji/go v1.1.7 h1:/68gy2h+1mWMrwZFeD1kQialdSzAb432dtpeJ42ovdo=
+github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
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+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-rsc.io/quote/v3 v3.1.0 h1:9JKUTTIUgS6kzR9mK1YuGKv6Nl+DijDNIc0ghT58FaY=
+gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 h1:tQIYjPdBoyREyB9XMu+nnTclpTYkz2zFM+lzLJFO4gQ=
+gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
-rsc.io/sampler v1.3.0 h1:7uVkIFmeBqHfdjD+gZwtXXI+RODJ2Wc4O7MPEh/QiW4=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+rsc.io/sampler v1.99.99/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

kinesis/kinesis.go

@@ -80,6 +80,7 @@ type OutputPlugin struct {
 	appendNewline         bool
 	timeKey               string
 	fmtStrftime           *strftime.Strftime
+	logKey                string
 	client                PutRecordsClient
 	timer                 *plugins.Timeout
 	PluginID              int
@@ -93,7 +94,7 @@ type OutputPlugin struct {
 }
 
 // NewOutputPlugin creates an OutputPlugin object
-func NewOutputPlugin(region, stream, dataKeys, partitionKey, roleARN, kinesisEndpoint, stsEndpoint, timeKey, timeFmt string, concurrency, retryLimit int, appendNewline bool, pluginID int) (*OutputPlugin, error) {
+func NewOutputPlugin(region, stream, dataKeys, partitionKey, roleARN, kinesisEndpoint, stsEndpoint, timeKey, timeFmt, logKey string, concurrency, retryLimit int, appendNewline bool, pluginID int) (*OutputPlugin, error) {
 	client, err := newPutRecordsClient(roleARN, region, kinesisEndpoint, stsEndpoint)
 	if err != nil {
 		return nil, err
@@ -135,6 +136,7 @@ func NewOutputPlugin(region, stream, dataKeys, partitionKey, roleARN, kinesisEnd
 		appendNewline:         appendNewline,
 		timeKey:               timeKey,
 		fmtStrftime:           timeFormatter,
+		logKey:                logKey,
 		timer:                 timer,
 		PluginID:              pluginID,
 		random:                random,
@@ -326,7 +328,19 @@ func (outputPlugin *OutputPlugin) processRecord(record map[interface{}]interface
 	}
 
 	var json = jsoniter.ConfigCompatibleWithStandardLibrary
-	data, err := json.Marshal(record)
+	var data []byte
+
+	if outputPlugin.logKey != "" {
+		log, err := plugins.LogKey(record, outputPlugin.logKey)
+		if err != nil {
+			return nil, err
+		}
+
+		data, err = plugins.EncodeLogKey(log)
+	} else {
+		data, err = json.Marshal(record)
+	}
+
 	if err != nil {
 		logrus.Debugf("[kinesis %d] Failed to marshal record: %v\n", outputPlugin.PluginID, record)
 		return nil, err