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Data Prepper configuration reference

This page lists all supported Data Prepper server, sources, buffers, processors, and sinks, along with their associated options. For example configuration files, see Data Prepper.

Data Prepper server options

Option	Required	Type	Description
ssl	No	Boolean	Indicates whether TLS should be used for server APIs. Defaults to true.
keyStoreFilePath	No	String	Path to a .jks or .p12 keystore file. Required if ssl is true.
keyStorePassword	No	String	Password for keystore. Optional, defaults to empty string.
privateKeyPassword	No	String	Password for private key within keystore. Optional, defaults to empty string.
serverPort	No	Integer	Port number to use for server APIs. Defaults to 4900.
metricRegistries	No	List	Metrics registries for publishing the generated metrics. Currently supports Prometheus and CloudWatch. Defaults to Prometheus.
metricTags	No	Map	Key-value pairs as common metric tags to metric registries. The maximum number of pairs is three. Note that serviceName is a reserved tag key with DataPrepper as default tag value. Alternatively, administrators can set this value through the environment variable DATAPREPPER_SERVICE_NAME. If serviceName is defined in metricTags, that value overwrites those set through the above methods.
authentication	No	Object	Authentication configuration. Valid option is http_basic with username and password properties. If not defined, the server does not perform authentication.
processorShutdownTimeout	No	Duration	Time given to processors to clear any in-flight data and gracefully shutdown. Default is 30s.
sinkShutdownTimeout	No	Duration	Time given to sinks to clear any in-flight data and gracefully shutdown. Default is 30s.
peer_forwarder	No	Object	Peer forwarder configurations. See Peer forwarder options for more details.

Peer forwarder options

The following section details various configuration options for peer forwarder.

General options for peer forwarder

Option	Required	Type	Description
port	No	Integer	The port number peer forwarder server is running on. Valid options are between 0 and 65535. Defaults is 4994.
request_timeout	No	Integer	Request timeout in milliseconds for peer forwarder HTTP server. Default is 10000.
server_thread_count	No	Integer	Number of threads used by peer forwarder server. Default is 200.
client_thread_count	No	Integer	Number of threads used by peer forwarder client. Default is 200.
max_connection_count	No	Integer	Maximum number of open connections for peer forwarder server. Default is 500.
max_pending_requests	No	Integer	Maximum number of allowed tasks in ScheduledThreadPool work queue. Default is 1024.
discovery_mode	No	String	Peer discovery mode to use. Valid options are local_node, static, dns, or aws_cloud_map. Defaults to local_node, which processes events locally.
static_endpoints	Conditionally	List	A list containing endpoints of all Data Prepper instances. Required if discovery_mode is set to static.
domain_name	Conditionally	String	A single domain name to query DNS against. Typically, used by creating multiple DNS A Records for the same domain. Required if discovery_mode is set to dns.
aws_cloud_map_namespace_name	Conditionally	String	Cloud Map namespace when using AWS Cloud Map service discovery. Required if discovery_mode is set to aws_cloud_map.
aws_cloud_map_service_name	Conditionally	String	Cloud Map service name when using AWS Cloud Map service discovery. Required if discovery_mode is set to aws_cloud_map.
aws_cloud_map_query_parameters	No	Map	Key-value pairs to filter the results based on the custom attributes attached to an instance. Only instances that match all the specified key-value pairs are returned.
buffer_size	No	Integer	Max number of unchecked records the buffer accepts. Number of unchecked records is the sum of the number of records written into the buffer and the num of in-flight records not yet checked by the Checkpointing API. Default is 512.
batch_size	No	Integer	Max number of records the buffer returns on read. Default is 48.
aws_region	Conditionally	String	AWS region to use ACM, S3 or AWS Cloud Map. Required if use_acm_certificate_for_ssl is set to true or ssl_certificate_file and ssl_key_file is AWS S3 path or discovery_mode is set to aws_cloud_map.
drain_timeout	No	Duration	Wait time for the peer forwarder to complete processing data before shutdown. Default is 10s.

TLS/SSL options for peer forwarder

Option	Required	Type	Description
ssl	No	Boolean	Enables TLS/SSL. Default is true.
ssl_certificate_file	Conditionally	String	SSL certificate chain file path or AWS S3 path. S3 path example s3://<bucketName>/<path>. Required if ssl is true and use_acm_certificate_for_ssl is false. Defaults to config/default_certificate.pem which is the default certificate file. Read more about how the certificate file is generated here.
ssl_key_file	Conditionally	String	SSL key file path or AWS S3 path. S3 path example s3://<bucketName>/<path>. Required if ssl is true and use_acm_certificate_for_ssl is false. Defaults to config/default_private_key.pem which is the default private key file. Read more about how the default private key file is generated here.
ssl_insecure_disable_verification	No	Boolean	Disables the verification of server's TLS certificate chain. Default is false.
ssl_fingerprint_verification_only	No	Boolean	Disables the verification of server's TLS certificate chain and instead verifies only the certificate fingerprint. Default is false.
use_acm_certificate_for_ssl	No	Boolean	Enables TLS/SSL using certificate and private key from AWS Certificate Manager (ACM). Default is false.
acm_certificate_arn	Conditionally	String	ACM certificate ARN. The ACM certificate takes preference over S3 or a local file system certificate. Required if use_acm_certificate_for_ssl is set to true.
acm_private_key_password	No	String	ACM private key password that decrypts the private key. If not provided, Data Prepper generates a random password.
acm_certificate_timeout_millis	No	Integer	Timeout in milliseconds for ACM to get certificates. Default is 120000.
aws_region	Conditionally	String	AWS region to use ACM, S3 or AWS Cloud Map. Required if use_acm_certificate_for_ssl is set to true or ssl_certificate_file and ssl_key_file is AWS S3 path or discovery_mode is set to aws_cloud_map.

Authentication options for peer forwarder

Option	Required	Type	Description
authentication	No	Map	Authentication method to use. Valid options are mutual_tls (use mTLS) or unauthenticated (no authentication). Default is unauthenticated.

General pipeline options

Option	Required	Type	Description
workers	No	Integer	Essentially the number of application threads. As a starting point for your use case, try setting this value to the number of CPU cores on the machine. Default is 1.
delay	No	Integer	Amount of time in milliseconds workers wait between buffer read attempts. Default is 3,000.

Sources

Sources define where your data comes from.

otel_trace_source

Source for the OpenTelemetry Collector.

Option	Required	Type	Description
port	No	Integer	The port OTel trace source is running on. Default is 21890.
request_timeout	No	Integer	The request timeout in milliseconds. Default is 10_000.
health_check_service	No	Boolean	Enables a gRPC health check service under grpc.health.v1/Health/Check. Default is false.
unauthenticated_health_check	No	Boolean	Determines whether or not authentication is required on the health check endpoint. Data Prepper ignores this option if no authentication is defined. Default is false.
proto_reflection_service	No	Boolean	Enables a reflection service for Protobuf services (see gRPC reflection and gRPC Server Reflection Tutorial docs). Default is false.
unframed_requests	No	Boolean	Enable requests not framed using the gRPC wire protocol.
thread_count	No	Integer	The number of threads to keep in the ScheduledThreadPool. Default is 200.
max_connection_count	No	Integer	The maximum allowed number of open connections. Default is 500.
ssl	No	Boolean	Enables connections to the OTel source port over TLS/SSL. Defaults to true.
sslKeyCertChainFile	Conditionally	String	File-system path or AWS S3 path to the security certificate (e.g. "config/demo-data-prepper.crt" or "s3://my-secrets-bucket/demo-data-prepper.crt"). Required if ssl is set to true.
sslKeyFile	Conditionally	String	File-system path or AWS S3 path to the security key (e.g. "config/demo-data-prepper.key" or "s3://my-secrets-bucket/demo-data-prepper.key"). Required if ssl is set to true.
useAcmCertForSSL	No	Boolean	Whether to enable TLS/SSL using certificate and private key from AWS Certificate Manager (ACM). Default is false.
acmCertificateArn	Conditionally	String	Represents the ACM certificate ARN. ACM certificate take preference over S3 or local file system certificate. Required if useAcmCertForSSL is set to true.
awsRegion	Conditionally	String	Represents the AWS region to use ACM or S3. Required if useAcmCertForSSL is set to true or sslKeyCertChainFile and sslKeyFile are AWS S3 paths.
authentication	No	Object	An authentication configuration. By default, an unauthenticated server is created for the pipeline. This parameter uses pluggable authentication for HTTPS. To use basic authentication, define the http_basic plugin with a username and password. To provide customer authentication, use or create a plugin that implements GrpcAuthenticationProvider.

http_source

This is a source plugin that supports HTTP protocol. Currently ONLY support Json UTF-8 codec for incoming request, e.g. [{"key1": "value1"}, {"key2": "value2"}].

Option	Required	Type	Description
port	No	Integer	The port the source is running on. Default is 2021. Valid options are between 0 and 65535.
health_check_service	No	Boolean	Enables health check service on /health endpoint on the defined port. Default is false.
unauthenticated_health_check	No	Boolean	Determines whether or not authentication is required on the health check endpoint. Data Prepper ignores this option if no authentication is defined. Default is false.
request_timeout	No	Integer	The request timeout in millis. Default is 10_000.
thread_count	No	Integer	The number of threads to keep in the ScheduledThreadPool. Default is 200.
max_connection_count	No	Integer	The maximum allowed number of open connections. Default is 500.
max_pending_requests	No	Integer	The maximum number of allowed tasks in ScheduledThreadPool work queue. Default is 1024.
authentication	No	Object	An authentication configuration. By default, this creates an unauthenticated server for the pipeline. This uses pluggable authentication for HTTPS. To use basic authentication define the http_basic plugin with a username and password. To provide customer authentication, use or create a plugin that implements ArmeriaHttpAuthenticationProvider.
ssl	No	Boolean	Enables TLS/SSL. Default is false.
ssl_certificate_file	Conditionally	String	SSL certificate chain file path or AWS S3 path. S3 path example s3://<bucketName>/<path>. Required if ssl is true and use_acm_certificate_for_ssl is false.
ssl_key_file	Conditionally	String	SSL key file path or AWS S3 path. S3 path example s3://<bucketName>/<path>. Required if ssl is true and use_acm_certificate_for_ssl is false.
use_acm_certificate_for_ssl	No	Boolean	Enables TLS/SSL using certificate and private key from AWS Certificate Manager (ACM). Default is false.
acm_certificate_arn	Conditionally	String	ACM certificate ARN. The ACM certificate takes preference over S3 or a local file system certificate. Required if use_acm_certificate_for_ssl is set to true.
acm_private_key_password	No	String	ACM private key password that decrypts the private key. If not provided, Data Prepper generates a random password.
acm_certificate_timeout_millis	No	Integer	Timeout in milliseconds for ACM to get certificates. Default is 120000.
aws_region	Conditionally	String	AWS region to use ACM or S3. Required if use_acm_certificate_for_ssl is set to true or ssl_certificate_file and ssl_key_file is AWS S3 path.

otel_metrics_source

Source for the OpenTelemetry Collector for collecting metric data.

Option	Required	Type	Description
port	No	Integer	The port OTel metrics source is running on. Default is 21891.
request_timeout	No	Integer	The request timeout in milliseconds. Default is 10_000.
health_check_service	No	Boolean	Enables a gRPC health check service under grpc.health.v1/Health/Check. Default is false.
proto_reflection_service	No	Boolean	Enables a reflection service for Protobuf services (see gRPC reflection and gRPC Server Reflection Tutorial docs). Default is false.
unframed_requests	No	Boolean	Enable requests not framed using the gRPC wire protocol.
thread_count	No	Integer	The number of threads to keep in the ScheduledThreadPool. Default is 200.
max_connection_count	No	Integer	The maximum allowed number of open connections. Default is 500.
ssl	No	Boolean	Enables connections to the OTel source port over TLS/SSL. Defaults to true.
sslKeyCertChainFile	Conditionally	String	File-system path or AWS S3 path to the security certificate (e.g. "config/demo-data-prepper.crt" or "s3://my-secrets-bucket/demo-data-prepper.crt"). Required if ssl is set to true.
sslKeyFile	Conditionally	String	File-system path or AWS S3 path to the security key (e.g. "config/demo-data-prepper.key" or "s3://my-secrets-bucket/demo-data-prepper.key"). Required if ssl is set to true.
useAcmCertForSSL	No	Boolean	Whether to enable TLS/SSL using certificate and private key from AWS Certificate Manager (ACM). Default is false.
acmCertificateArn	Conditionally	String	Represents the ACM certificate ARN. ACM certificate take preference over S3 or local file system certificates. Required if useAcmCertForSSL is set to true.
awsRegion	Conditionally	String	Represents the AWS Region to use ACM or S3. Required if useAcmCertForSSL is set to true or sslKeyCertChainFile and sslKeyFile are AWS S3 paths.
authentication	No	Object	An authentication configuration. By default, an unauthenticated server is created for the pipeline. This uses pluggable authentication for HTTPS. To use basic authentication, define the http_basic plugin with a username and password. To provide customer authentication, use or create a plugin that implements GrpcAuthenticationProvider.

s3

This is a source plugin that reads events from Amazon Simple Storage Service (Amazon S3) objects.

Option	Required	Type	Description
notification_type	Yes	String	Must be sqs
compression	No	String	The compression algorithm to apply: none, gzip, or automatic. Default is none.
codec	Yes	Codec	The codec to apply. Must be newline, json, or csv.
sqs	Yes	sqs	The Amazon Simple Queue Service (Amazon SQS) configuration. See sqs for details.
aws	Yes	aws	The AWS configuration. See aws for details.
on_error	No	String	Determines how to handle errors in Amazon SQS. Can be either retain_messages or delete_messages. If retain_messages, then Data Prepper will leave the message in the SQS queue and try again. This is recommended for dead-letter queues. If delete_messages, then Data Prepper will delete failed messages. Default is retain_messages.
buffer_timeout	No	Duration	The timeout for writing events to the Data Prepper buffer. Any events that the S3 Source cannot write to the buffer in this time will be discarded. Default is 10 seconds.
records_to_accumulate	No	Integer	The number of messages that accumulate before writing to the buffer. Default is 100.
metadata_root_key	No	String	Base key for adding S3 metadata to each Event. The metadata includes the key and bucket for each S3 object. Defaults to s3/.
disable_bucket_ownership_validation	No	Boolean	If true, then the S3 Source will not attempt to validate that the bucket is owned by the expected account. The only expected account is the same account that owns the SQS queue. Defaults to false.

sqs

The following are configure usage of Amazon SQS in the S3 Source plugin.

Option	Required	Type	Description
queue_url	Yes	String	The URL of the Amazon SQS queue from which messages are received.
maximum_messages	No	Integer	The maximum number of messages to receive from the SQS queue in any single request. Default is 10.
visibility_timeout	No	Duration	The visibility timeout to apply to messages read from the SQS queue. This should be set to the amount of time that Data Prepper may take to read all the S3 objects in a batch. Default is 30s.
wait_time	No	Duration	The time to wait for long polling on the SQS API. Default is 20s.
poll_delay	No	Duration	A delay to place between reading and processing a batch of SQS messages and making a subsequent request. Default is 0s.

aws

Option	Required	Type	Description
region	No	String	The AWS Region to use for credentials. Defaults to standard SDK behavior to determine the Region.
sts_role_arn	No	String	The AWS Security Token Service (AWS STS) role to assume for requests to Amazon SQS and Amazon S3. Defaults to null, which will use the standard SDK behavior for credentials.

file

Source for flat file input.

Option	Required	Type	Description
path	Yes	String	Path to the input file (e.g. logs/my-log.log).
format	No	String	Format of each line in the file. Valid options are json or plain. Default is plain.
record_type	No	String	The record type to store. Valid options are string or event. Default is string. If you would like to use the file source for log analytics use cases like grok, set this option to event.

pipeline

Source for reading from another pipeline.

Option	Required	Type	Description
name	Yes	String	Name of the pipeline to read from.

stdin

Source for console input. Can be useful for testing. No options.

Buffers

Buffers store data as it passes through the pipeline. If you implement a custom buffer, it can be memory-based (better performance) or disk-based (larger).

bounded_blocking

The default buffer. Memory-based.

Option	Required	Type	Description
buffer_size	No	Integer	The maximum number of records the buffer accepts. Default is 512.
batch_size	No	Integer	The maximum number of records the buffer drains after each read. Default is 8.

Processors

Processors perform some action on your data: filter, transform, enrich, etc.

Prior to Data Prepper 1.3, Processors were named Preppers. Starting in Data Prepper 1.3, the term Prepper is deprecated in favor of Processor. Data Prepper will continue to support the term "Prepper" until 2.0, where it will be removed. {: .note }

otel_trace_raw

This processor is a Data Prepper event record type replacement of otel_trace_raw_prepper (no longer supported since Data Prepper 2.0). The processor fills in trace group related fields including

• traceGroup: root span name
• endTime: end time of the entire trace in ISO 8601
• durationInNanos: duration of the entire trace in nanoseconds
• statusCode: status code for the entire trace in nanoseconds

in all incoming Data Prepper span records by state caching the root span info per traceId.

Option	Required	Type	Description
trace_flush_interval	No	Integer	Represents the time interval in seconds to flush all the descendant spans without any root span. Default is 180.

service_map_stateful

Uses OpenTelemetry data to create a distributed service map for visualization in OpenSearch Dashboards.

Option	Required	Type	Description
window_duration	No	Integer	Represents the fixed time window in seconds to evaluate service-map relationships. Default is 180.

string_converter

Converts string to uppercase or lowercase. Mostly useful as an example if you want to develop your own processor.

Option	Required	Type	Description
upper_case	No	Boolean	Whether to convert to uppercase (true) or lowercase (false).

aggregate

Groups events together based on the keys provided and performs a action on each group.

Option	Required	Type	Description
identification_keys	Yes	List	A unordered list by which to group Events. Events with the same values for these keys are put into the same group. If an Event does not contain one of the identification_keys, then the value of that key is considered to be equal to null. At least one identification_key is required. (e.g. ["sourceIp", "destinationIp", "port"]).
action	Yes	AggregateAction	The action to be performed for each group. One of the available Aggregate Actions must be provided or you can create custom aggregate actions. remove_duplicates and put_all are available actions. For more information, see creating custom aggregate actions.
group_duration	No	String	The amount of time that a group should exist before it is concluded automatically. Supports ISO_8601 notation strings ("PT20.345S", "PT15M", etc.) as well as simple notation for seconds ("60s") and milliseconds ("1500ms"). Default value is 180s.

date

Adds a default timestamp to the event or parses timestamp fields, and converts it to ISO 8601 format, which can be used as event timestamp.

Option	Required	Type	Description
match	Conditionally	List	List of key and patterns where patterns is a list. The list of match can have exactly one key and patterns. There is no default value. This option cannot be defined at the same time as from_time_received. Include multiple date processors in your pipeline if both options should be used.
from_time_received	Conditionally	Boolean	A boolean that is used for adding default timestamp to event data from event metadata which is the time when source receives the event. Default value is false. This option cannot be defined at the same time as match. Include multiple date processors in your pipeline if both options should be used.
destination	No	String	Field to store the timestamp parsed by date processor. It can be used with both match and from_time_received. Default value is @timestamp.
source_timezone	No	String	Time zone used to parse dates. It is used in case zone or offset cannot be extracted from the value. If zone or offset are part of the value, then timezone is ignored. Find all the available timezones the list of database time zones in the "TZ database name" column.
destination_timezone	No	String	Timezone used for storing timestamp in destination field. The available timezone values are the same as source_timestamp.
locale	No	String	Locale is used for parsing dates. It's commonly used for parsing month names(MMM). It can have language, country and variant fields using IETF BCP 47 or String representation of Locale object. For example en-US for IETF BCP 47 and en_US for string representation of Locale. Full list of locale fields which includes language, country and variant can be found the language subtag registry. Default value is Locale.ROOT.

drop_events

Drops all the events that are passed into this processor.

Option	Required	Type	Description
drop_when	Yes	String	Accepts a Data Prepper Expression string following the Data Prepper Expression Syntax. Configuring drop_events with drop_when: true drops all the events received.
handle_failed_events	No	Enum	Specifies how exceptions are handled when an exception occurs while evaluating an event. Default value is drop, which drops the event so it doesn't get sent to OpenSearch. Available options are drop, drop_silently, skip, skip_silently. For more information, see handle_failed_events.

grok

Takes unstructured data and utilizes pattern matching to structure and extract important keys and make data more structured and queryable.

Option	Required	Type	Description
match	No	Map	Specifies which keys to match specific patterns against. Default is an empty body.
keep_empty_captures	No	Boolean	Enables preserving null captures. Default value is false.
named_captures_only	No	Boolean	enables whether to keep only named captures. Default value is true.
break_on_match	No	Boolean	Specifies whether to match all patterns or stop once the first successful match is found. Default is true.
keys_to_overwrite	No	List	Specifies which existing keys are to be overwritten if there is a capture with the same key value. Default is [].
pattern_definitions	No	Map	Allows for custom pattern use inline. Default value is an empty body.
patterns_directories	No	List	Specifies the path of directories that contain customer pattern files. Default value is an empty list.
pattern_files_glob	No	String	Specifies which pattern files to use from the directories specified for pattern_directories. Default is *.
target_key	No	String	Specifies a parent level key to store all captures. Default value is null.
timeout_millis	No	Integer	Maximum amount of time that should take place for the matching. Setting to 0 disables the timeout. Default value is 30,000.

key_value

Takes in a field and parses it into key/value pairs.

Option	Required	Type	Description
source	No	String	The key in the event that is parsed. Default value is message.
destination	No	String	The key where to output the parsed source to. Doing so overwrites the value of the key if it exists. Default value is parsed_message
field_delimiter_regex	Conditionally	String	A regex specifying the delimiter between key/value pairs. Special regex characters such as [ and ] must be escaped using \\. This option cannot be defined at the same time as field_split_characters.
field_split_characters	Conditionally	String	A string of characters to split between key/value pairs. Special regex characters such as [ and ] must be escaped using \\. Default value is &. This option cannot be defined at the same time as field_delimiter_regex.
key_value_delimiter_regex	Conditionally	String	A regex specifying the delimiter between a key and a value. Special regex characters such as [ and ] must be escaped using \\. There is no default value. This option cannot be defined at the same time as value_split_characters.
value_split_characters	Conditionally	String	A string of characters to split between keys and values. Special regex characters such as [ and ] must be escaped using \\. Default value is =. This option cannot be defined at the same time as key_value_delimiter_regex.
non_match_value	No	String	When a key/value cannot be successfully split, the key/value is be placed in the key field and the specified value in the value field. Default value is null.
prefix	No	String	A prefix given to all keys. Default value is empty string.
delete_key_regex	No	String	A regex used to delete characters from the key. Special regex characters such as [ and ] must be escaped using \\. There is no default value.
delete_value_regex	No	String	A regex used to delete characters from the value. Special regex characters such as [ and ] must be escaped using \\. There is no default value.

add_entries

Adds an entry to event. add_entries is part of mutate event processors.

Option	Required	Type	Description
entries	Yes	List	List of events to be added. Valid entries are key, value, and overwrite_if_key_exists.
key	N/A	N/A	Key of the new event to be added.
value	N/A	N/A	Value of the new entry to be added. Valid data types are strings, booleans, numbers, null, nested objects, and arrays containing the aforementioned data types.
overwrite_if_key_exists	No	Boolean	If true, the existing value gets overwritten if the key already exists within the event. Default is false.

copy_values

Copy values within an event. copy_values is part of mutate event processors.

Option	Required	Type	Description
entries	Yes	List	List of entries to be copied. Valid values are from_key, to_key, and overwrite_if_key_exists.
from_key	N/A	N/A	The key of the entry to be copied.
to_key	N/A	N/A	The key of the new entry to be added.
overwrite_if_to_key_exists	No	Boolean	If true, the existing value gets overwritten if the key already exists within the event. Default is false.

delete_entries

Delete entries in an event. delete_entries is part of mutate event processors.

Option	Required	Type	Description
with_keys	Yes	List	An array of keys of the entries to be deleted.

rename_keys

Rename keys in an event. rename_keys is part of mutate event processors.

Option	Required	Type	Description
entries	Yes	List	List of entries. Valid values are from_key, to_key, and overwrite_if_key_exists. Renaming occurs in the order defined.
from_key	N/A	N/A	The key of the entry to be renamed.
to_key	N/A	N/A	The new key of the entry.
overwrite_if_to_key_exists	No	Boolean	If true, the existing value gets overwritten if to_key already exists in the event.

substitute_string

Matches a key's value against a regular expression and replaces all matches with a replacement string. substitute_string is part of mutate string processors.

Option	Required	Type	Description
entries	Yes	List	List of entries. Valid values are source, from, and to.
source	N/A	N/A	The key to modify.
from	N/A	N/A	The Regex String to be replaced. Special regex characters such as [ and ] must be escaped using \\ when using double quotes and \ when using single quotes. See Java Patterns for more information.
to	N/A	N/A	The String to be substituted for each match of from.

split_string

Splits a field into an array using a delimiter character. split_string is part of mutate string processors.

Option	Required	Type	Description
entries	Yes	List	List of entries. Valid values are source, delimiter, and delimiter_regex.
source	N/A	N/A	The key to split.
delimiter	No	N/A	The separator character responsible for the split. Cannot be defined at the same time as delimiter_regex. At least delimiter or delimiter_regex must be defined.
delimiter_regex	No	N/A	The regex string responsible for the split. Cannot be defined at the same time as delimiter. At least delimiter or delimiter_regex must be defined.

uppercase_string

Converts a string to its uppercase counterpart. uppercase_string is part of mutate string processors.

Option	Required	Type	Description
with_keys	Yes	List	A list of keys to convert to uppercase.

lowercase_string

Converts a string to its lowercase counterpart. lowercase_string is part of mutate string processors.

Option	Required	Type	Description
with_keys	Yes	List	A list of keys to convert to lowercase.

trim_string

Strips whitespace from the beginning and end of a key. trim_string is part of mutate string processors.

Option	Required	Type	Description
with_keys	Yes	List	A list of keys to trim the whitespace from.

csv

Takes in an Event and parses its CSV data into columns.

Option	Required	Type	Description
source	No	String	The field in the Event that will be parsed. Default is message.
quote_character	No	String	The character used as a text qualifier for a single column of data. Default is double quote ".
delimiter	No	String	The character separating each column. Default is ,.
delete_header	No	Boolean	If specified, the header on the Event (column_names_source_key) deletes after the Event is parsed. If there’s no header on the Event, no actions is taken. Default is true.
column_names_source_key	No	String	The field in the Event that specifies the CSV column names, which will be autodetected. If there must be extra column names, the column names autogenerate according to their index. If column_names is also defined, the header in column_names_source_key can also be used to generate the Event fields. If too few columns are specified in this field, the remaining column names autogenerate. If too many column names are specified in this field, CSV processor omits the extra column names.
column_names	No	List	User-specified names for the CSV columns. Default is [column1, column2, ..., columnN] if there are N columns of data in the CSV record and column_names_source_key is not defined. If column_names_source_key is defined, the header in column_names_source_key generates the Event fields. If too few columns are specified in this field, the remaining column names will autogenerate. If too many column names are specified in this field, CSV processor omits the extra column names.

json

Takes in an Event and parses its JSON data, including any nested fields.

Option	Required	Type	Description
source	No	String	The field in the Event that will be parsed. Default is message.
destination	No	String	The destination field of the parsed JSON. Defaults to the root of the Event. Cannot be "", /, or any whitespace-only String because these are not valid Event fields.
pointer	No	String	A JSON Pointer to the field to be parsed. There is no pointer by default, meaning the entire source is parsed. The pointer can access JSON Array indices as well. If the JSON Pointer is invalid then the entire source data is parsed into the outgoing Event. If the pointed-to key already exists in the Event and the destination is the root, then the pointer uses the entire path of the key.

Routes

Routes define conditions that can be used in sinks for conditional routing. Routes are specified at the same level as processors and sinks under the name route and consist of a list of key-value pairs, where the key is the name of a route and the value is a Data Prepper expression representing the routing condition.

Sinks

Sinks define where Data Prepper writes your data to.

General options for all sink types

Option	Required	Type	Description
routes	No	List	List of routes that the sink accepts. If not specified, the sink accepts all upstream events.

opensearch

Sink for an OpenSearch cluster.

Option	Required	Type	Description
hosts	Yes	List	List of OpenSearch hosts to write to (e.g. ["https://localhost:9200", "https://remote-cluster:9200"]).
cert	No	String	Path to the security certificate (e.g. "config/root-ca.pem") if the cluster uses the OpenSearch security plugin.
username	No	String	Username for HTTP basic authentication.
password	No	String	Password for HTTP basic authentication.
aws_sigv4	No	Boolean	default false. Whether to use IAM signing to connect to an Amazon OpenSearch Service domain. For your access key, secret key, and optional session token, Data Prepper uses the default credential chain (environment variables, Java system properties, ~/.aws/credential, etc.).
aws_region	No	String	AWS region (e.g. "us-east-1") for the domain if you are connecting to Amazon OpenSearch Service.
aws_sts_role_arn	No	String	IAM role which the sink plugin assumes to sign request to Amazon OpenSearch Service. If not provided the plugin uses the default credentials.
socket_timeout	No	Integer	the timeout in milliseconds for waiting for data (or, put differently, a maximum period inactivity between two consecutive data packets). A timeout value of zero is interpreted as an infinite timeout. If this timeout value is either negative or not set, the underlying Apache HttpClient would rely on operating system settings for managing socket timeouts.
connect_timeout	No	Integer	The timeout in milliseconds used when requesting a connection from the connection manager. A timeout value of zero is interpreted as an infinite timeout. If this timeout value is either negative or not set, the underlying Apache HttpClient would rely on operating system settings for managing connection timeouts.
insecure	No	Boolean	Whether to verify SSL certificates. If set to true, CA certificate verification is disabled and insecure HTTP requests are sent instead. Default is false.
proxy	No	String	The address of a forward HTTP proxy server. The format is "<host name or IP>:<port>". Examples: "example.com:8100", "http://example.com:8100", "112.112.112.112:8100". Port number cannot be omitted.
index	Conditionally	String	Name of the export index. Applicable and required only when the index_type is custom.
index_type	No	String	This index type tells the Sink plugin what type of data it is handling. Valid values: custom, trace-analytics-raw, trace-analytics-service-map, management-disabled. Default is custom.
template_file	No	String	Path to a JSON index template file (e.g. /your/local/template-file.json) if index_type is custom. See otel-v1-apm-span-index-template.json for an example.
document_id_field	No	String	The field from the source data to use for the OpenSearch document ID (e.g. "my-field") if index_type is custom.
dlq_file	No	String	The path to your preferred dead letter queue file (e.g. /your/local/dlq-file). Data Prepper writes to this file when it fails to index a document on the OpenSearch cluster.
bulk_size	No	Integer (long)	The maximum size (in MiB) of bulk requests to the OpenSearch cluster. Values below 0 indicate an unlimited size. If a single document exceeds the maximum bulk request size, Data Prepper sends it individually. Default is 5.
ism_policy_file	No	String	The absolute file path for an ISM (Index State Management) policy JSON file. This policy file is effective only when there is no built-in policy file for the index type. For example, custom index type is currently the only one without a built-in policy file, thus it would use the policy file here if it's provided through this parameter. For more information, see ISM policies.
number_of_shards	No	Integer	The number of primary shards that an index should have on the destination OpenSearch server. This parameter is effective only when template_file is either explicitly provided in Sink configuration or built-in. If this parameter is set, it would override the value in index template file. For more information, see Create index.
number_of_replicas	No	Integer	The number of replica shards each primary shard should have on the destination OpenSearch server. For example, if you have 4 primary shards and set number_of_replicas to 3, the index has 12 replica shards. This parameter is effective only when template_file is either explicitly provided in Sink configuration or built-in. If this parameter is set, it would override the value in index template file. For more information, see Create index.

file

Sink for flat file output.

Option	Required	Type	Description
path	Yes	String	Path for the output file (e.g. logs/my-transformed-log.log).

pipeline

Sink for writing to another pipeline.

Option	Required	Type	Description
name	Yes	String	Name of the pipeline to write to.

stdout

Sink for console output. Can be useful for testing. No options.