--- layout: default title: Configuring Data Prepper parent: Managing Data Prepper nav_order: 5 redirect_from: - /clients/data-prepper/data-prepper-reference/ - /monitoring-plugins/trace/data-prepper-reference/ --- # Configuring Data Prepper You can customize your Data Prepper configuration by editing the `data-prepper-config.yaml` file in your Data Prepper installation. The following configuration options are independent from pipeline configuration options. ## Data Prepper configuration Use the following options to customize your Data Prepper configuration. Option | Required | Type | Description :--- | :--- |:--- | :--- ssl | No | Boolean | Indicates whether TLS should be used for server APIs. Defaults to true. keyStoreFilePath | No | String | The path to a .jks or .p12 keystore file. Required if `ssl` is true. keyStorePassword | No | String | The password for keystore. Optional, defaults to empty string. privateKeyPassword | No | String | The password for a private key within keystore. Optional, defaults to empty string. serverPort | No | Integer | The port number to use for server APIs. Defaults to 4900. metricRegistries | No | List | The metrics registries for publishing the generated metrics. Currently supports Prometheus and Amazon CloudWatch. Defaults to Prometheus. metricTags | No | Map | A map of 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 the 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 | The authentication configuration. Valid option is `http_basic` with `username` and `password` properties. If not defined, the server does not perform authentication. processorShutdownTimeout | No | Duration | The time given to processors to clear any in-flight data and gracefully shut down. Default is 30s. sinkShutdownTimeout | No | Duration | The time given to sinks to clear any in-flight data and gracefully shut down. Default is 30s. peer_forwarder | No | Object | Peer forwarder configurations. See [Peer forwarder options](#peer-forwarder-options) for more details. circuit_breakers | No | [circuit_breakers](#circuit-breakers) | Configures a circuit breaker on incoming data. ### Peer forwarder options The following section details various configuration options for peer forwarder. #### General options for peer forwarding Option | Required | Type | Description :--- | :--- | :--- | :--- port | No | Integer | The peer forwarding server port. Valid options are between 0 and 65535. Defaults is 4994. request_timeout | No | Integer | The request timeout for the peer forwarder HTTP server in milliseconds. Default is 10000. server_thread_count | No | Integer | The number of threads used by the peer forwarder server. Default is 200. client_thread_count | No | Integer | The number of threads used by the peer forwarder client. Default is 200. max_connection_count | No | Integer | The maximum number of open connections for the peer forwarder server. Default is 500. max_pending_requests | No | Integer | The maximum number of allowed tasks in ScheduledThreadPool work queue. Default is 1024. discovery_mode | No | String | The 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 | The 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 | A map of 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 | The maximum 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 | The maximum number of records the buffer returns on read. Default is 48. aws_region | Conditionally | String | The AWS region to use with 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 | The 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 | The SSL certificate chain file path or AWS S3 path. S3 path example `s3:///`. 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](https://github.com/opensearch-project/data-prepper/tree/main/examples/certificates). ssl_key_file | Conditionally | String | The SSL key file path or AWS S3 path. S3 path example `s3:///`. 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](https://github.com/opensearch-project/data-prepper/tree/main/examples/certificates). 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 | The 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 | The ACM private key password that decrypts the private key. If not provided, Data Prepper generates a random password. acm_certificate_timeout_millis | No | Integer | The timeout in milliseconds for ACM to get certificates. Default is 120000. aws_region | Conditionally | String | The 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 | The authentication method to use. Valid options are `mutual_tls` (use mTLS) or `unauthenticated` (no authentication). Default is `unauthenticated`. ### Circuit breakers Data Prepper provides a circuit breaker to help prevent exhausting Java memory. And is useful when pipelines have stateful processors as these can retain memory usage outside of the buffers. When a circuit breaker is tripped, Data Prepper rejects incoming data routing into buffers. Option | Required | Type | Description :--- | :--- |:---| :--- heap | No | [heap](#heap-circuit-breaker) | Enables a heap circuit breaker. By default, this is not enabled. #### Heap circuit breaker Configures Data Prepper to trip a circuit breaker when JVM heap reaches a specified usage threshold. Option | Required | Type | Description :--- |:---|:---| :--- usage | Yes | Bytes | Specifies the JVM heap usage at which to trip a circuit breaker. If the current Java heap usage exceeds this value then the circuit breaker will be open. This can be a value such as `6.5gb`. reset | No | Duration | After tripping the circuit breaker, no new checks are made until after this time has passed. This effectively sets the minimum time for a breaker to remain open to allow for clearing memory. Defaults to `1s`. check_interval | No | Duration | Specifies the time between checks of the heap size. Defaults to `500ms`.