Redis is an open-source, in-memory, data-structure store, with the optional ability to write and persist data to a disk, which can be used as a key-value database, cache, and message broker. Redis features built-in transactions, replication, and support for a variety of data structures such as strings, hashes, lists, sets, and others.

Deploying a Marketplace App

The Linode Marketplace allows you to easily deploy software on a Compute Instance using the Cloud Manager. See Get Started with Marketplace Apps for complete steps.

1. Log in to the Cloud Manager and select the Marketplace link from the left navigation menu. This displays the Linode Create page with the Marketplace tab pre-selected.

2. Under the Select App section, select the app you would like to deploy.

3. Complete the form by following the steps and advice within the Creating a Compute Instance guide. Depending on the Marketplace App you selected, there may be additional configuration options available. See the Configuration Options section below for compatible distributions, recommended plans, and any additional configuration options available for this Marketplace App.

4. Click the Create Linode button. Once the Compute Instance has been provisioned and has fully powered on, wait for the software installation to complete. If the instance is powered off or restarted before this time, the software installation will likely fail.

To verify that the app has been fully installed, see Get Started with Marketplace Apps > Verify Installation. Once installed, follow the instructions within the Getting Started After Deployment section to access the application and start using it.

Note

Estimated deployment time: Redis should be fully installed within 2-5 minutes after the Compute Instance has finished provisioning.

Configuration Options

• Supported distributions: Debian 11, Ubuntu 20.04 LTS
• Recommended minimum plan: All plan types and sizes can be used, though consider using a High Memory Compute Instance for larger databases in a production environment.

Redis Options

Limited User (Optional)

You can optionally fill out the following fields to automatically create a limited user for your new Compute Instance. This is recommended for most deployments as an additional security measure. This account will be assigned to the sudo group, which provides elevated permission when running commands with the sudo prefix.

• Limited sudo user: Enter your preferred username for the limited user.
• Password for the limited user: Enter a strong password for the new user.
• SSH public key for the limited user: If you wish to login as the limited user through public key authentication (without entering a password), enter your public key here. See Creating an SSH Key Pair and Configuring Public Key Authentication on a Server for instructions on generating a key pair.
• Disable root access over SSH: To block the root user from logging in over SSH, select Yes (recommended). You can still switch to the root user once logged in and you can also log in as root through Lish.

Custom Domain (Optional)

If you wish to access your application using a custom domain, fill out the following fields.

• Linode API Token: If you wish to use the Linode’s DNS Manager to manage DNS records for your custom domain, create a Linode API Personal Access Token on your account with Read/Write access to Domains. If this is provided along with the subdomain and domain fields (outlined below), the installation attempts to create DNS records via the Linode API. See Get an API Access Token. If you do not provide this field, you need to manually configure your DNS records through your DNS provider and point them to the IP address of the new instance.
• Subdomain: The subdomain you wish to use, such as www for www.example.com.
• Domain: The domain name you wish to use, such as example.com.

• Email address for the SOA record: The start of authority (SOA) email address for this server. This is a required field if you want the installer to create DNS records.

Getting Started after Deployment

Access the Redis CLI

1. Log in to your new Compute Instance through Lish or SSH using either the root user or limited user and the associated password you entered when creating the instance.

2. To use the redis-cli, run either of the commands below:

   • redis-cli: This opens the interactive mode where you can type in whichever commands you wish.
   • redis-cli [argument], where [argument] is the argument or command you wish to run. For instance, running redis-cli ping should result in the output of PONG if redis is configured properly.

For more information about the redis-cli and the commands you have available, see redis-cli, the Redis command line interface.

Determining How to Use Redis

There are several types of Redis configurations you can use. For example, you can configure Redis as a standalone Redis installation or a Redis cluster with a primary (master) and two replicas. As a next step, you should determine which type of deployment you require for your use case by reviewing the resources provided below.

• Learn about Redis Clusters by going through their related tutorial.
• Redis Sentinel is another deployment configuration focused on high availability. See the Redis Sentinel documentation for more details.
• Read the Redis Quickstart to learn about securing Redis and installing client libraries to use Redis with your applications.
• Refer to the Redis configuration documentation to learn about the Redis configuration file.

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Once you have determined how you would like to configure your Redis deployment, connect to your Linode via SSH to complete your configuration.

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Note

Currently, Linode does not manage software and systems updates for Marketplace Apps. It is up to the user to perform routine maintenance on software deployed in this fashion.

More Information

You may wish to consult the following resources for additional information on this topic. While these are provided in the hope that they will be useful, please note that we cannot vouch for the accuracy or timeliness of externally hosted materials.

• Introduction to Redis Data Types
• Redis Replication