Installing KSQL

This topic describes how to use package managers to download and install KSQL from the MEP repository.

Preparing for Installation

KSQL is included in MEP repositories beginning with MEP 6.0.0. For instructions on setting up the MEP repository, see Step 10: Install Ecosystem Components Manually.

The default KSQL configuration parameters are stored in /opt/mapr/ksql/ksql-<version>/etc/ksql.

KSQL Operational Modes

To install KSQL, you can use the MapR Installer or the manual steps on this page. KSQL can be used in one of two modes:

Mode	Description
Interactive Mode	This mode is non-secure and allows developers to write KSQL queries interactively using the KSQL CLI.
Non-interactive Mode	This mode is more secure than the Interactive mode and is designed for KSQL query production deployment. Since the queries are known ahead of time, you can run non-interactive queries with more restrictive permissions.

Installation steps are the same for both modes. Run the following commands as root or using sudo.

Install KSQL in Interactive or Non-interactive Mode

You can install the mapr-ksql package on as many or as few nodes as you want. Installing on multiple nodes can increase availability of the service.

On Ubuntu:

apt-get install mapr-ksql

On RedHat/ CentOS:

yum install mapr-ksql

On SUSE:

zypper install mapr-ksql

Verify KSQL Installation

To confirm successful installation, you can:

Check for the presence of the KSQL home folder at /opt/mapr/ksql/ksql-<version>.
Perform a test run:
1. Start the KSQL server:
```
/opt/mapr/ksql/ksql-[version]/bin/ksql-server-start /opt/mapr/ksql/ksql-<version>/etc/ksql/ksql-server.properties
```
2. Verify that KSQL is running by making a call to http://localhost:8084/info. For example:
```
curl http://localhost:8084/info
```
The expected response is:
```
{"KsqlServerInfo":{"version":"(version)"}}
```

Configure KSQL

To configure KSQL, see KSQL Configuration.