Are you trying to find out how to install Kapacitor on Ubuntu 22.04 LTS? Here’s everything you need to know about it.
Kapacitor is a real-time stream data processing system. It is available for several platforms, such as Linux, macOS, and Windows. We will discuss the main steps for installation and enable Kapacitor as a service.
Introduction to Kapacitor
The Kapacitor software is a powerful and easy-to-use tool for real-time data processing. It can manage streaming data in real-time. So, it is primarily a real-time stream-based data processing engine with the following essential features:
- It can work as a pre-processor. Deployable across the infrastructure to downsample and perform analytics before shipping the data to influx DB
- It can also work as a post-processor. It allows old high-precision data to be stored in various data stores like Hadoop. In those data stores, further analysis can be performed
- It supports scripting using a lambda expression. Using these lambda expressions, you can define transformation for data as well as Boolean conditions to filter the data
Prerequisites for installation
To follow the article, you may need the root privileges or an account with sudo privileges. In addition, you must take care of the following two aspects:
- Kapacitor listens on transmission control protocol (TCP) port 9092. This is required for all write and application programming interface(API) calls.
- In addition, the Kapacitor may bind on random user datagram protocol (UDP) ports for the handling of influx DB data via subscriptions
How to Install Kapacitor on Ubuntu 22.04 LTS
The installation of the Kapacitor is straightforward. There are two binaries available for Kapacitor. The first one is the Kapacitor command line interface (CLI). It is required for calling the Kapacitor API. The sKapacitord server daemon is needed for calling the Kapacitor API.
All you need to do is to download these two binaries from the following link. Alternatively, follow the steps below for installation.
Update your system
The very first step is to update your system. For this purpose, open the terminal by clicking System Menu and then choose Terminal. Now, type the following command on the Terminal:
$sudo apt update -y && sudo apt upgrade –y
Downloading the file from the repository
As the Kapacitor package is not available in the standard Ubuntu repository. So, you need to first download its binaries. For this purpose, type the following command on the Terminal:
$wget https://dl.influxdata.com/Kapacitor/releases/Kapacitor_1.6.3-1_amd64.deb
Note that you may need some pre-requisite software installed to download the binaries. If you encounter any problems, install these pre-requisites via the following command:
$sudo apt-get install wget curl
Install the Kapacitor package
Finally, you can install the Kapacitor package as follows:
$sudo dpkg -i Kapacitor_1.6.3-1_amd64.deb
It will take a while for installation, as shown in the figure below:
Tip: In case you encounter any dependency issues, you may try the following command to resolve this problem:
$sudo apt install –f
Starting and enabling Kapacitor as a service
Now we will discuss starting and enabling Kapacitor as a service. Follow the steps below.
Start Kapacitor as a service using service utility
To start the Kapacitor as a service, type the following command on the Terminal:
$sudo service Kapacitor start
Start Kapacitor as a service using the systemctl utility
Alternatively, you can use the systemctl to start Kapacitor as a service. For this purpose, type the following command on your Terminal:
$sudo systemctl start Kapacitor
In order the enable the service, type the following command on the Terminal:
$sudo systemctl enable Kapacitor
Finally, verify the status of the service as follows:
$sudo systemctl status Kapacitor
Running the Kapacitor service
After installing the Kapacitor service, you can perform the following steps to verify and configure it.
Verify the installation
To verify the installation, type the following command on the Terminal:
$Kapacitor version
You should see the version of the Kapacitor. In addition to the above version command, you can also try the following command:
$Kapacitor list tasks
The above command will show you the list of queued tasks. The output should look something as seen below:
ID Type Status Executing Databases and Retention Policies
In case of any error, a detailed report will be printed.
Checking the configuration
You can check the configuration of the Kapacitor by running the following command on the Terminal:
$Kapacitord config
Generating a new configuration
In addition, you can generate a new configuration by running the following command on the Terminal:
$Kapacitord config > Kapacitor.generated.conf
Usage of the Kapacitor software
The following command can run the Kapacitor daemon software on the Terminal:
./Kapacitord -config <PATH TO CONFIGURATION>
In this article, we have discussed the installation steps for Kapacitor. It is a real-time processing system for streaming data. We have discussed the prerequisites for installation, the detailed steps for installation, enabling Kapacitor as a system service, and the measures for verifying installation and configuration.
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