Install Kong Gateway on CentOS

The Kong Gateway software is governed by the Kong Software License Agreement. Kong is licensed under an .

A supported system with root or root-equivalent access.
(Enterprise only) A file from Kong.

Download and Install

You can install Kong Gateway by downloading an installation package or using our YUM repository.

Package

YUM repository

Install Kong Gateway on CentOS from the command line.

Download the Kong package:

Kong Gateway

Kong Gateway (OSS)

curl -Lo kong-2.6.0.rpm $(rpm --eval "https://download.konghq.com/gateway-2.x-centos-%{centos_ver}/Packages/k/kong-2.6.0.el%{centos_ver}.amd64.rpm")

Install the YUM repository from the command line.

Download the Kong APT repository:

 curl $(rpm --eval "https://download.konghq.com/gateway-2.x-centos-%{centos_ver}/config.repo") | sudo tee /etc/yum.repos.d/kong.repo

Install Kong:

Kong Gateway

Kong Gateway (OSS)

sudo yum install kong-enterprise-edition-2.6.0.4

sudo yum install kong-2.6.0

Set up configs

Kong Gateway comes with a default configuration property file that can be found at /etc/kong/kong.conf.default if you installed Kong Gateway with one of the official packages. This configuration file is used for setting Kong Gateway’s configuration properties at startup.

Kong Gateway offers two options for storing the configuration properties for all of Kong Gateway’s configured entities, a database or a yaml declarative configuration file. Before starting Kong Gateway you must update the kong.conf.default configuration property file with a reference to your datastore.

To alter the default properties listed in the kong.conf.default file and configure Kong Gateway, make a copy of the file, rename it (for example kong.conf), make your updates, and save it to the same location.

For more information on how to configure Kong Gateway to connect to your datastore, see the Datastore section of the .

First, you must configure Kong Gateway using the kong.conf configuration file so it can connect to your database.

Kong Gateway supports both PostgreSQL and as its datastore.

If you are using Postgres, provision a database and a user before starting Kong Gateway, for example:

CREATE USER kong; CREATE DATABASE kong OWNER kong;

Then, run the Kong Gateway migrations, using the following command:

If you want to store the configuration properties for all of Kong Gateway’s configured entities in a yaml declarative configuration file, also referred to as DB-less mode, you must create a kong.yml file and update the kong.conf configuration file to include the file path to the kong.yml file.

First, the following command will generate a kong.yml declarative configuration file in your current folder:

kong config init

The generated kong.yml file contains instructions for how to configure Kong Gateway using the file.

Second, you must configure Kong Gateway using the kong.conf configuration file so it is aware of your declarative configuration file.

Set the database option to and the declarative_config option to the path of your kong.yml file as in the following example:

database = off
declarative_config = {PATH_TO_KONG.CONF_FILE}

Setting a password for the Super Admin before initial start-up is strongly recommended. This will permit the use of RBAC (Role Based Access Control) at a later time, if needed.

Create an environment variable with the desired Super Admin password and store the password in a safe place. Run migrations to prepare the Kong database, using the following command:

KONG_PASSWORD={PASSWORD} kong migrations bootstrap -c {PATH_TO_KONG.CONF_FILE}

Start Kong Gateway

Start Kong Gateway using the following command:

kong start -c {PATH_TO_KONG.CONF_FILE}

Verify install

If everything went well, you should see a message (Kong started) informing you that Kong Gateway is running.

You can also check using the Admin API:

curl -i http://localhost:8001

You should receive a 200 status code.

By default, listens on the following ports:

:8000: Port on which listens for incoming HTTP traffic from your clients, and forwards it to your upstream services.
:8443: Port on which listens for incoming HTTPS traffic. This port has similar behavior as the :8000 port, except that it expects HTTPS traffic only. This port can be disabled with the kong.confconfiguration file.
:8001: Port on which the Admin API used to configure listens.
:8444: Port on which the Admin API listens for HTTPS traffic.

The following steps are all optional and depend on the choices you want to make for your environment.

If you have an Enterprise license for Kong Gateway, apply it using one of the methods below, depending on your environment.

With a database

Without a database

POST the contents of the provided license.json license to your Kong Gateway instance:

cURL

HTTPie


  -d payload='{"license":{"payload":{"admin_seats":"1","customer":"Example Company, Inc","dataplanes":"1","license_creation_date":"2017-07-20","license_expiration_date":"2017-07-20","license_key":"00141000017ODj3AAG_a1V41000004wT0OEAU","product_subscription":"Konnect Enterprise","support_plan":"None"},"signature":"6985968131533a967fcc721244a979948b1066967f1e9cd65dbd8eeabe060fc32d894a2945f5e4a03c1cd2198c74e058ac63d28b045c2f1fcec95877bd790e1b","version":"1"}}'

  payload='{"license":{"payload":{"admin_seats":"1","customer":"Example Company, Inc","dataplanes":"1","license_creation_date":"2017-07-20","license_expiration_date":"2017-07-20","license_key":"00141000017ODj3AAG_a1V41000004wT0OEAU","product_subscription":"Konnect Enterprise","support_plan":"None"},"signature":"6985968131533a967fcc721244a979948b1066967f1e9cd65dbd8eeabe060fc32d894a2945f5e4a03c1cd2198c74e058ac63d28b045c2f1fcec95877bd790e1b","version":"1"}}'

Securely copy the license.json file to your home directory on the filesystem where you have installed Kong Gateway:

Then, copy the license file again, this time to the /etc/kong directory:

$ scp license.json /etc/kong/license.json

Kong Gateway will look for a valid license in this location.

If you’re running Kong Gateway with a database (either in traditional or hybrid mode), you can enable Kong Gateway’s graphical user interface (GUI), Kong Manager.

Update the admin_gui_url property in the kong.conf configuration file to the DNS, or IP address, of your system. For example:
```
 admin_gui_url = http://localhost:8002
```
This setting needs to resolve to a network path that will reach the operating system (OS) host.
Update the Admin API setting in the kong.conf file to listen on the needed network interfaces on the OS host. A setting of 0.0.0.0:8001 will listen on port 8001 on all available network interfaces.

Example configuration:
```
 admin_listen = 0.0.0.0:8001, 0.0.0.0:8444 ssl
```
You may also list network interfaces separately as in this configuration example:
```
 admin_listen = 0.0.0.0:8001, 0.0.0.0:8444 ssl, 127.0.0.1:8001, 127.0.0.1:8444 ssl
```
Restart Kong Gateway for the setting to take effect, using the following command:
```
 kong restart -c {PATH_TO_KONG.CONF_FILE}
```
Access Kong Manager on port 8002.

If you’re running Kong Gateway with a database (either in traditional or hybrid mode), you can enable the Dev Portal.

Enable the Dev Portal in the kong.conf file by setting the portal property to on and the portal_gui_host property to the DNS or IP address of the system. For example:
```
 portal = on
 portal_gui_host = localhost:8003
```
Restart Kong Gateway for the setting to take effect, using the following command:
```
 kong restart -c {PATH_TO_KONG.CONF_FILE}
```
To enable the Dev Portal for a workspace, execute the following command, updating DNSorIP to reflect the IP or valid DNS for the system:
Access the Dev Portal for the default workspace using the following URL, substituting your own DNS or IP:

Troubleshooting and support

For troubleshooting license issues, see:

Deployment options for licenses

If you did not receive an HTTP/1.1 200 OK message or need assistance completing your setup, reach out to your Kong Support contact or go to the Support Portal.

CentOS