Apache Nifi 简明教程

Apache NiFi - Configuration

Apache NiFi 是一个高度可配置的平台。conf 目录中的 nifi.properties 文件

Apache NiFi is highly configurable platform. The nifi.properties file in conf directory

包含大部分配置。

contains most of the configuration.

Apache NiFi 常用的属性如下 −

The commonly used properties of Apache NiFi are as follows −

Core properties

此部分包含运行 NiFi 实例所需的属性。

This section contains the properties, which are compulsory to run a NiFi instance.

S.No.

Property name

Default Value

description

nifi.flow.configuration.file

./conf/flow.xml.gz

This property contains the path to flow.xml file. This file contains all the data flows created in NiFi.

nifi.flow.configuration.archive.enabled

true

This property is used to enable or disable archiving in NiFi.

nifi.flow.configuration.archive.dir

./conf/archive/

This property is used to specify the archive directory.

nifi.flow.configuration.archive.max.time

30 days

This is used to specify the retention time for archiving content.

nifi.flow.configuration.archive.max.storage

500 MB

it contains the maximum size of archiving directory can grow.

nifi.authorizer.configuration.file

./conf/authorizers.xml

To specify the authorizer configuration file, which is used for user authorization.

nifi.login.identity.provider.configuration.file

./conf/login-identity-providers.xml

This property contains the configuration of login identity providers,

nifi.templates.directory

./conf/templates

This property is used to specify the directory, where NiFi templates will be stored.

nifi.nar.library.directory

./lib

This property contains the path to library, which NiFi will use to load all the components using NAR files present in this lib folder.

nifi.nar.working.directory

./work/nar/

This directory will be storing the unpacked nar files, once NiFi processes them.

nifi.documentation.working.directory

./work/docs/components

This directory contains the documentation of all components.

State Management

这些属性用于存储组件状态，这些状态有助于启动处理，即组件在重新启动后剩余的状态和在下次计划运行时的状态。

These properties are used to store the state of the components helpful to start the processing, where components left after a restart and in the next schedule running.

S.No.

Property name

Default Value

description

nifi.state.management.configuration.file

./conf/state-management.xml

This property contains the path to state-management.xml file. This file contains all component state present in the data flows of that NiFi instance.

nifi.state.management.provider.local

local-provider

It contains the ID of the local state provider.

nifi.state.management.provider.cluster

zk-provider

This property contains the ID of the cluster-wide state provider. This will be ignored if NiFi is not clustered but must be populated if running in a cluster.

nifi.state.management. embedded. zookeeper. start

false

This property specifies whether or not this instance of NiFi should run an embedded ZooKeeper server.

nifi.state.management. embedded. zookeeper.properties

./conf/zookeeper.properties

This property contains the path of the properties file that provides the ZooKeeper properties to use if <nifi.state.management. embedded. zookeeper. start> is set to true.

FlowFile Repository

现在，我们来看一看 FlowFile 存储库的重要说明 –

Let us now look into the important details of the FlowFile repository −

S.No.

Property name

Default Value

description

nifi.flowfile.repository. implementation

org.apache.nifi. controller. repository. WriteAhead FlowFileRepository

This property is used to specify either to store the flowfiles in memory or disk. If a user want to stores the flowfiles in memory then change to "org.apache.nifi.controller. repository.VolatileFlowFileRepository".

nifi.flowfile.repository.directory

./flowfile_repository

To specify the directory for flowfile repository.