Nagios Core Pre-Configured - Network Monitoring

This is a repackaged open source software product wherein additional charges apply for cloudimg support services.

## Nagios Core - Pre-Configured Monitoring for AWS

Nagios Core is the industry-leading open source monitoring solution trusted by IT teams worldwide. This AMI delivers Nagios Core pre-configured and ready to run on your choice of Alma Linux 9, Ubuntu Server 22.04, or Ubuntu Server 24.04 - enabling you to start monitoring networks, servers, applications, and infrastructure within minutes of launch.

This is a repackaged open source software product with additional charges for cloudimg professional support services.

## Why This AMI Over a Vanilla Nagios Install?

Deploying Nagios Core from scratch requires installing dependencies, configuring Apache, setting up CGI permissions, and tuning check intervals - a process that can take hours. This AMI eliminates that setup burden with a production-ready configuration that includes the Nagios web interface accessible via your browser, core monitoring plugins pre-installed, and service definitions ready for customization. You go from AMI launch to your first monitoring check in minutes, not hours.

## Who This Is For

This AMI is built for sysadmins, NOC engineers, and DevOps teams who need reliable infrastructure visibility - whether you are a small team monitoring50 EC2 instances or a managed service provider tracking uptime SLAs across multiple client environments. It suits hybrid AWS environments where you need to monitor both cloud resources and on-premises legacy servers from a single dashboard.

## Network and Infrastructure Monitoring

Monitor routers, switches, firewalls, and network services using SNMP and ICMP checks via plugins. Track bandwidth, port availability, and link status across your entire network topology. For servers, monitor CPU usage, memory consumption, disk space, load averages, and process health - gaining visibility into resource utilization before problems escalate into outages.

## Alerting and Notifications

Configure multi-channel alerting through email, SMS, and custom notification scripts. Define escalation policies so the right team members are contacted at the right time. Set alert thresholds, schedule maintenance downtime windows, and use contact groups to route notifications by severity and responsibility. The result: faster incident response and fewer missed outages.

## Plugin Ecosystem

Nagios supports over 4,000 community and custom plugins available through Nagios Exchange. Monitor HTTP, HTTPS, FTP, SSH, databases, mail servers, DNS, and virtually any service with a network endpoint. Develop custom plugins using standard interfaces, or leverage NRPE for agent-based checks on remote hosts.

## Web Interface and Performance Data

Access a full web-based dashboard showing real-time host and service status, status maps, alert history, and notification logs. Performance graphing provides historical metrics, trend analysis, and capacity planning data - helping you make informed decisions about scaling your infrastructure.

## Distributed Monitoring

Scale beyond a single server with distributed monitoring architecture. Use NRPE agents for remote active checks, NSCA for passive check submission, and SSH-based checks for secure remote monitoring. Monitor thousands of hosts across multiple locations from a central interface.

## Example Use Case

A DevOps team of three engineers monitors 50 EC2 instances running a microservices application. They configure Nagios to check HTTP endpoints every 60 seconds, monitor RDS database connections, and track EBS disk utilization. When CPU on any instance exceeds 85% for five minutes, Nagios sends a Slack notification via webhook. The team catches capacity issues before customers experience slowdowns, maintaining their99.9% uptime SLA.

## Deployment Details

• Operating Systems: Alma Linux 9, Ubuntu Server 22.04, Ubuntu Server 24.04
• Access: SSH on port 22
• Web Interface: Browser-based Nagios dashboard
• Monitoring Protocols: SNMP, ICMP, NRPE, NSCA, HTTP/HTTPS checks
• Check Types: Active and passive monitoring with configurable intervals and retry logic

## cloudimg 24/7 Professional Support

Every subscription includes access to cloudimg expert support around the clock via phone, email, and chat. Support covers Nagios configuration assistance, plugin setup and development, monitoring strategy consultation, alert tuning, performance optimization, and troubleshooting. Whether you need help designing your monitoring topology or resolving an urgent alerting issue, the cloudimg team provides rapid, knowledgeable assistance.

## Getting Started

1. Launch the AMI from AWS Marketplace on your preferred instance type

2. Connect via SSH on port 22

3. Access the Nagios web interface through your browser

4. Add hosts and services to monitor using pre-installed templates

5. Configure alerting contacts and notification methods