What is and for what ?
Nifi is a web tool that we can use to perform data ingestion.
It allows us to listen, format and make a first filter of the messages (data) received by several of its embedded processors.
Likewise process and distribute data.
Download Packages and checks
Download the packages from:
There we will find different versions of the product.
Then we proceed to perform a CHECKSUM to verify that it is a safe package and that it did not suffer alterations along the way.
[amercado.nbfor101200] ➤ md5sum nifi-1.4.0-bin.tar.gz 28c5511073452cf59e9ec1b278a1a7e4 nifi-1.4.0-bin.tar.gz
Unzip the package in the path
that we selected for our installation, in my particular case I defined the / opt to perform the installation of all my BD packages.
cd /opt tar -xvzf nifi-1.4.0-bin.tar.gz
In the case that I expose, the user who owns my infra of BigData is the hadoop user, then I will assign the necessary permissions, but you can choose the one you have available or create a user called nifi.
cd /opt tar -xvzf chown -R hadoop. /opt/nifi-1.4.0/
As a recommendation, I propose to create a symbolic Link in order to have a simple name.
This point will be easy search the data or integrate the env variable, and the specific version that we have.
ln -s /opt/nifi-1.4.0/ /opt/nifi
Let’s configure NIFI
In order to start with the application startup, we must review in the following configuration file:
- Here we could change for example the default port, which in 8080.
- Configurations related to the configuration in Cluster mode, kerberos and zookeper.
- Have Java Installed.
- Have the Java environment variables set in the .bash_profile file.
Starting the Service
Starting the Service.
In order to start the NIFI service, we can do it manually or as a service, explore the two options.
Start of the service manually.
/opt/nifi/nifi.sh start /opt/nifi/nifi.sh status /opt/nifi/nifi.sh stop
Starting the Service, as a Linux Service
We must start with the installation as a service, So Let’s start by going to the NIFI home, where the binaries are located.
cd /opt/nifi/ bin/nifi.sh install
Remember that we can choose the name of the service with which we will identify our NIFI, it is a dataflow, we could identify it under that name, or with the name that we think convenient as administrators.
cd /opt/nifi/ bin/nifi.sh install dataflow
In the case of not choosing any name, remember that you will use the default name of the service, identified as nifi.
Already configured, we upload the services with the classic commands for it:
service start nifi service status nifi service stop nifi
Let’s see an example
# service start nifi # service status nifi ● nifi.service - Apache NiFi Loaded: loaded (/etc/systemd/system/nifi.service; disabled; vendor preset: enabled) Active: active (running) since Thu 2017-11-23 15:33:50 -03; 52s ago Process: 26296 ExecStart=/opt/nifi/bin/nifi.sh start (code=exited, status=0/SUCCESS) Main PID: 26314 (nifi.sh) Tasks: 91 Memory: 1.8G CPU: 1min 12.788s CGroup: /system.slice/nifi.service ├─26314 /bin/sh /opt/nifi/bin/nifi.sh start ├─26316 /usr/bin/java -cp /opt/nifi/conf:/opt/nifi/lib/bootstrap/* -Xms12m -Xmx24m -Dorg.apache.nifi.bootstrap.config.log.dir=/opt/nifi/logs -Dorg.apache.nifi.bootstrap.config └─26333 java -classpath /opt/nifi/./conf:/opt/nifi/./lib/logback-core-1.2.3.jar:/opt/nifi/./lib/nifi-properties-1.4.0.jar:/opt/nifi/./lib/nifi-framework-api-1.4.0.jar:/opt/nif Nov 23 15:33:47 srvhadoopt1 systemd: Starting Apache NiFi... Nov 23 15:33:47 srvhadoopt1 nifi.sh: /opt/nifi/bin/nifi.sh: 88: /opt/nifi/bin/nifi.sh: source: not found Nov 23 15:33:47 srvhadoopt1 nifi.sh: nifi.sh: JAVA_HOME not set; results may vary Nov 23 15:33:47 srvhadoopt1 nifi.sh: Java home: Nov 23 15:33:47 srvhadoopt1 nifi.sh: NiFi home: /opt/nifi Nov 23 15:33:47 srvhadoopt1 nifi.sh: Bootstrap Config File: /opt/nifi/conf/bootstrap.conf Nov 23 15:33:50 srvhadoopt1 systemd: Started Apache NiFi. #
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