Fusion 2026R2 represents complete re-imagining of the solution, both under the hood and in the user interface. In this article we’ll dig into the exciting changes and updates, and provide links to additional resources to help you explore 2026R2 further. Central visibility of your Nagios XI, Core, Log Server, and Network Analyzer data has never looked better!

Crisp New Web Interface

We’ll begin with the most obvious change: the user interface, which has been rebuilt from the ground up.

The updated interface provides a sleek, responsive modern platform to configure and interact with your fused servers on, and includes both a light and dark theme.

Dashboards

Over the last couple years, streamlined React-based dashboards have been rolled into Nagios Log Server, Nagios XI Smart Dashboards, and Nagios Network Analyzer. Now, they’ve hit Fusion in 2026R2!

The new dashboard approach provides crisp visual data in customizable dashlets. Choose from a variety of ready-made templates, or start from scratch with the new Blank option. Resizing and re-arranging your panels is a breeze, and Roles (discussed below) make it easy to limit select users to visibility and control of only their own dashboards, or to give them global access. Full details on using dashboards and dashlets can be found here:

Using Dashboards in Nagios Fusion 2026R2

Users and Roles

2026R2 also supports a new Roles feature, enabling you to use RBAC (role-based access control) to define permission sets and quickly apply them to new and existing users. Role permissions include items like Dashboards, Views, Servers (i.e. fused Nagios servers), and API access. You can review the following guide for more details:

Managing Users and Roles in Nagios Fusion 2026R2

Event-Based Collection

Another exciting enhancement you’ll find in 2026R2 is the new Event-Based collection method. This enables you to send alert data upstream to Fusion from your Nagios XI, Log Server, and Network Analyzer servers when problems are found and state changes occur. Note that this feature requires XI, NLS, and NNA 2026R2+.

This brand new approach for feeding live alert data to Fusion is sure to provide value. Rather than the current sole approach of polling the remote Nagios servers on a set interval, the fused servers themselves will send alert data upstream to 2026R2. By employing both approaches, you’ll be able to use a less aggressive polling interval to grab all of the data periodically, and can rely on the Event-Based feed for catching important live events rapidly when they occur.

These rapid results will display both in the Alert History section of the Overview pages for your fused servers, and in dashlets you create using the alert_history InfluxDB endpoint.

You can learn more about fusing your Nagios servers with 2026R2, and about setting up Event-Based collection, here:

Managing Fused Servers in Nagios Fusion

Powerful REST API

2026R2 also includes a brand new, robust, and fully documented API which can be used to fetch data about and programmatically manage most aspects of the system. You can learn more about the API usage and explore the available endpoints here:

Using the REST API in Fusion 2026R2

SSL setup script

If you wish to use SSL/TLS for a secure https connection to the web interface, a new setup script takes care of a lot of the heavy lifting. You can find full setup details here:

Configuring SSL/TLS in Fusion 2026R2

Migrating to 2026R2

Since 2026R2 is built on entirely new frameworks and components, there will not be an inline upgrade option. However, there will be a migration path you can use to move much of your user and fused server data from legacy Fusion to 2026R2. You can find details on this process here:

Migrating to Nagios Fusion 2026R2

Resources

The free trial version is a great way to explore the power of 2026R2:

Nagios Fusion Free Trial Download

The Admin Guide is an excellent resource to help you locate the documentation you need to get things going:

Nagios Fusion Admin Guide

Here’s a video overview of Fusion’s interface and features:

If you have any questions, please feel free to reach out to sales@nagios.com so we can assist you further.

The Immense Scale of Apple’s IT Landscape

Imagine the sheer volume of devices, servers, networks, and applications that power Apple’s operations:

• Data Centers: Thousands of servers, storage arrays, and networking equipment supporting iCloud, Apple Music, the App Store, and other online services.
• Retail Stores: Complex networks, point-of-sale systems, and inventory management tools across hundreds of locations worldwide.
• Corporate Campuses: Extensive internal networks, development servers, and communication systems supporting a global workforce.
• Manufacturing and Logistics: Sophisticated systems tracking production, shipping, and distribution of millions of products.
• Customer Support: Infrastructure supporting vast call centers and online support platforms.

Monitoring such a diverse and geographically dispersed environment effectively is a monumental task. This is where a comprehensive and scalable solution like Nagios XI shines.

Nagios XI: The Backbone of Operational Excellence

Nagios XI provides a powerful, unified platform for monitoring an organization’s entire IT infrastructure. Its benefits directly address the challenges faced by large enterprises like Apple:

1. Proactive Problem Detection and Resolution: Nagios XI continuously monitors critical systems, applications, and network devices for performance issues and errors. Intelligent alerting ensures IT teams are immediately notified of potential problems, allowing for rapid response and minimizing downtime. This proactive approach is crucial for maintaining the “always-on” experience Apple users expect.
2. Comprehensive Visibility and Control: Nagios XI’s intuitive dashboards offer a centralized view of the entire IT landscape, providing insights into system health, performance trends, and potential bottlenecks. This holistic perspective is invaluable for understanding interdependencies and making informed decisions. Different teams within Apple can even tailor dashboards to display the metrics most relevant to their specific roles, enhancing efficiency and focus.
3. Scalability to Meet Enterprise Demands: Nagios XI’s architecture allows for distributed monitoring, enabling it to scale across multiple data centers and geographically dispersed locations. This is vital for a company with a global footprint like Apple. Furthermore, the vast Nagios Exchange offers thousands of community-developed plugins, allowing Apple to monitor virtually any device, application, or service, from macOS servers and network devices to custom-built internal applications.
4. Performance Optimization and Capacity Planning: Nagios XI collects historical performance data, enabling IT teams to analyze trends, identify recurring issues, and optimize resource allocation. By analyzing past usage, Nagios XI can also help predict future resource requirements, allowing Apple to make strategic investments in infrastructure before demand overwhelms existing capacity. This foresight is critical for managing rapid growth and new product launches.
5. Security and Compliance: Continuous monitoring helps identify unusual activity or performance deviations that could indicate a security breach or misconfiguration. Nagios XI also provides detailed logs and reports, assisting with compliance audits and ensuring that IT operations adhere to strict security policies.

The Apple-Nagios Connection (Illustrative Example):

While Apple does not publicly endorse its specific monitoring tools, the principles of effective IT management are universal. For instance, Nagios XI’s ability to monitor macOS systems via SNMP and NCPA agents allows for deep insights into the performance of Apple’s own hardware and software. Imagine a scenario where:

• A sudden spike in CPU usage on an iCloud server is detected by Nagios XI, triggering an alert.
• IT operations quickly identify the root cause—a misbehaving service—and remediate it before users experience any service degradation.
• Performance graphs in Nagios XI confirm that the server has returned to optimal operation.

This seamless, proactive approach is what allows Apple to maintain its reputation for delivering high-quality, reliable products and services.

Conclusion:

In an era where technology drives every aspect of business, organizations like Apple understand that their success hinges on the uninterrupted and optimal performance of their IT infrastructure. Nagios XI provides the robust, scalable, and intelligent monitoring capabilities necessary to achieve this. By offering comprehensive visibility, proactive alerting, and powerful analytical tools, Nagios XI empowers enterprises to not only react to issues but to anticipate and prevent them, ultimately safeguarding their operations and enhancing the user experience. For any organization aiming for operational excellence in the digital age, the strategic adoption of a solution like Nagios XI is a clear path to achieving and maintaining a competitive edge.

To learn about more ways Nagios can solve real-life problems, check out our other Nagios Success Stories.

This article showcases Nagios Fusion 2026R1, an older version.

Nagios Fusion 2026R2, released in September of 2026, features a completely updated UI and backend, a new Event-Based data collection method, and more. Details on the exciting changes in 2026R2 can be found here:
Fusion Reignited! Discover What’s New in Nagios Fusion 2026R2

About Nagios Fusion

Nagios XI, our monitoring, alerting, graphing, and reporting solution, is an excellent value for environments both large and small. In larger environments where multiple monitoring servers may be required, Nagios Fusion provides immense value. If your IT infrastructure contains a few hundred hosts, a single XI monitoring server may be all you need to cover your requirement. As scale increases, it becomes necessary to split your monitoring between multiple XI servers. Nagios Fusion is here to help, providing you with a single pane of glass where you can view status information from across your Nagios monitoring servers.

Fusion can also be of great value in geographically dispersed infrastructures. You can deploy a local Nagios XI server at each location, then use Fusion for consolidated insight into important events. Fusion’s design makes it one of the easiest possible methods for achieving distributed monitoring in both cases of large scale and geographic separation. And now, starting in version 2026R1, Fusion also provides centralized management of the connected Nagios XI systems.

Distributed Monitoring Made Easy

Nagios Fusion reaches out to your Nagios XI servers on a customizable interval (by default every 5 minutes) to collect status data from them. The connection is via HTTP/HTTPS, saving you the trouble of setting up dedicated links or firewall rules, and simplifying setup. Fusion can also poll data on Nagios Log Server and Nagios Network Analyzer servers, providing a single pane of glass where you can view data collected by the whole Nagios Suite. Fusion also works with Nagios Core servers running version 4.0.7+.

Adding Nagios servers to your Fusion install is a quick and easy process, and once added the data from your fused servers can be viewed in custom Dashboards, rotating Views, and several built-in tactical displays.

Built-in Tactical Displays

One of many great things about Nagios Fusion is it provides value the moment you begin to fuse your Nagios servers, thanks to the built-in tactical displays. Let’s take a look at a couple of those options:

The Network Operations Center display provides an overview of open (aka unhandled) host and service problems which have not yet been acknowledged by an admin:

The Tactical Overview shows consolidated tables reflecting how many items are in various states overall and individually on each fused Nagios server:

As is the case with many of the dashlets we’ll discuss next, the above tactical displays aren’t just a visual aid; with a single click you’ll be viewing status detail pages and pre-filtered lists of objects in certain states directly in the web UI of your individual Nagios XI servers.

Customizable Insight with Fusion Dashboards

Nagios Fusion makes creating custom Dashboards quick and easy, and includes 30 unique dashlets displaying many types of data in a variety of ways, such as:

• Hostgroup and Servicegroup Status
• Open Host and Service Problems
• Recent Alerts
• Tactical Summary
• Nagios XI BPI Status
• Log Server Alerts
• Log Server Cluster Status
• Network Analyzer Alerts
• Network Analyzer Bandwidth Graphs

Dashlets can be colored and sized however you wish, and Dashboards you create can be deployed to other users who might find them useful to save time and maximize impact.

Let’s take a quick look at a couple of custom dashboards:

This example shows performance graphs for memory and drivespace on Windows and Linux servers, along with Tactical Summary and Open Problems dashlets:

In our second Dashboard, we have data on the health of our Fusion server itself, Host Health and Service Health summary dashlets, a Network Analyzer bandwidth graph, a Top alerts dashlet, and a Nagios XI BPI (Business Process Intelligence) group status dashlet:

Your handcrafted dashboards can also be added to your Views, enabling you to rotate through them (along with various built-in tactical displays and even custom URLs) at a configurable speed. Views are an excellent option for creating dynamic NOC screens.

Multi-Tenancy Made Easy

Another great aspect of Fusion is the robust multi-tenancy, which enables you to fine-tune what each of your Fusion users has visibility of and access to. You can determine which fused servers are visible, and map your Fusion users to existing Nagios XI users on a per-server basis:

Once mapped, the Fusion user’s visibility and click-through access will be limited to the hosts and services you’ve already given them permission to view in Nagios XI, saving you time and ensuring a consistent user experience and access control across your deployment.

Centralized Management

Nagios Fusion 2026R1 marks an important first step in an exciting new direction for Fusion: centralized management of fused Nagios XI systems. The ability to copy users from one Nagios XI system to others with a few clicks has now been added in the new Centralized Management menu. You can learn more about the capability here:

Nagios Fusion 2026R1: Discover The Dawn of Centralized Management

If you have a large environment, or an infrastructure spanning multiple locations or regions, Fusion will prove to be a valuable asset. The free 30 day trial is a great way to get started and see everything Fusion has to offer.