Nagios vs Prometheus

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Nagios

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Prometheus

963
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Nagios vs Prometheus: What are the differences?

Developers describe Nagios as "Complete monitoring and alerting for servers, switches, applications, and services". Nagios is a host/service/network monitoring program written in C and released under the GNU General Public License. On the other hand, Prometheus is detailed as "An open-source service monitoring system and time series database, developed by SoundCloud". Prometheus is a systems and service monitoring system. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts if some condition is observed to be true.

Nagios and Prometheus can be primarily classified as "Monitoring" tools.

Some of the features offered by Nagios are:

  • Monitor your entire IT infrastructure
  • Spot problems before they occur
  • Know immediately when problems arise

On the other hand, Prometheus provides the following key features:

  • a multi-dimensional data model (timeseries defined by metric name and set of key/value dimensions)
  • a flexible query language to leverage this dimensionality
  • no dependency on distributed storage

"It just works" is the primary reason why developers consider Nagios over the competitors, whereas "Powerful easy to use monitoring" was stated as the key factor in picking Prometheus.

Nagios and Prometheus are both open source tools. Prometheus with 25K GitHub stars and 3.55K forks on GitHub appears to be more popular than Nagios with 60 GitHub stars and 36 GitHub forks.

According to the StackShare community, Prometheus has a broader approval, being mentioned in 243 company stacks & 85 developers stacks; compared to Nagios, which is listed in 177 company stacks and 40 developer stacks.

What is Nagios?

Nagios is a host/service/network monitoring program written in C and released under the GNU General Public License.

What is Prometheus?

Prometheus is a systems and service monitoring system. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts if some condition is observed to be true.
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    What are some alternatives to Nagios and Prometheus?
    Zabbix
    Zabbix is a mature and effortless enterprise-class open source monitoring solution for network monitoring and application monitoring of millions of metrics.
    Splunk
    Splunk Inc. provides the leading platform for Operational Intelligence. Customers use Splunk to search, monitor, analyze and visualize machine data.
    Icinga
    It monitors availability and performance, gives you simple access to relevant data and raises alerts to keep you in the loop. It was originally created as a fork of the Nagios system monitoring application.
    Solarwinds
    Developed by network and systems engineers who know what it takes to manage today's dynamic IT environments, SolarWinds has a deep connection to the IT community.
    AppDynamics
    AppDynamics develops application performance management (APM) solutions that deliver problem resolution for highly distributed applications through transaction flow monitoring and deep diagnostics.
    See all alternatives
    Decisions about Nagios and Prometheus
    Joseph Irving
    Joseph Irving
    DevOps Engineer at uSwitch · | 4 upvotes · 29K views
    atuSwitchuSwitch
    Kubernetes
    Kubernetes
    Prometheus
    Prometheus
    Thanos
    Thanos

    We recently implemented Thanos alongside Prometheus into our Kubernetes clusters, we had previously used a variety of different metrics systems and we wanted to make life simpler for everyone by just picking one.

    Prometheus seemed like an obvious choice due to its powerful querying language, native Kubernetes support and great community. However we found it somewhat lacking when it came to being highly available, something that would be very important if we wanted this to be the single source of all our metrics.

    Thanos came along and solved a lot of these problems. It allowed us to run multiple Prometheis without duplicating metrics, query multiple Prometheus clusters at once, and easily back up data and then query it. Now we have a single place to go if you want to view metrics across all our clusters, with many layers of redundancy to make sure this monitoring solution is as reliable and resilient as we could reasonably make it.

    If you're interested in a bit more detail feel free to check out the blog I wrote on the subject that's linked.

    See more
    Conor Myhrvold
    Conor Myhrvold
    Tech Brand Mgr, Office of CTO at Uber · | 10 upvotes · 563.3K views
    atUber TechnologiesUber Technologies
    Nagios
    Nagios
    Grafana
    Grafana
    Graphite
    Graphite
    Prometheus
    Prometheus

    Why we spent several years building an open source, large-scale metrics alerting system, M3, built for Prometheus:

    By late 2014, all services, infrastructure, and servers at Uber emitted metrics to a Graphite stack that stored them using the Whisper file format in a sharded Carbon cluster. We used Grafana for dashboarding and Nagios for alerting, issuing Graphite threshold checks via source-controlled scripts. While this worked for a while, expanding the Carbon cluster required a manual resharding process and, due to lack of replication, any single node’s disk failure caused permanent loss of its associated metrics. In short, this solution was not able to meet our needs as the company continued to grow.

    To ensure the scalability of Uber’s metrics backend, we decided to build out a system that provided fault tolerant metrics ingestion, storage, and querying as a managed platform...

    https://eng.uber.com/m3/

    (GitHub : https://github.com/m3db/m3)

    See more
    Raja Subramaniam Mahali
    Raja Subramaniam Mahali
    Sysdig
    Sysdig
    Kubernetes
    Kubernetes
    Prometheus
    Prometheus

    We have Prometheus as a monitoring engine as a part of our stack which contains Kubernetes cluster, container images and other open source tools. Also, I am aware that Sysdig can be integrated with Prometheus but I really wanted to know whether Sysdig or sysdig+prometheus will make better monitoring solution.

    See more
    Interest over time
    Reviews of Nagios and Prometheus
    No reviews found
    How developers use Nagios and Prometheus
    Avatar of ShadowICT
    ShadowICT uses NagiosNagios

    We use Nagios to monitor our stack and alert us when problems arise. Nagios allows us to monitor every aspect of each of our servers such as running processes, CPU usage, disk usage, and more. This means that as soon as problems arise, we can detect them and call out an engineer to resolve the issues as soon as possible.

    Avatar of Scrayos UG (haftungsbeschränkt)
    Scrayos UG (haftungsbeschränkt) uses PrometheusPrometheus

    We primarily use Prometheus to gather metrics and statistics to display them in Grafana. Aside from that we poll Prometheus for our orchestration-solution "JCOverseer" to determine, which host is least occupied at the moment.

    Avatar of Analytical Informatics
    Analytical Informatics uses NagiosNagios

    We use Nagios to monitor customer instances of Bridge and proactively alert us about issues like queue sizes, downed services, errors in logs, etc.

    Avatar of Tom Staijen
    Tom Staijen uses PrometheusPrometheus

    Gather metrics from systems and applications. Evaluate alerting rules. Alerts are pushed to OpsGenie and Slack.

    Avatar of OnlineCity
    OnlineCity uses NagiosNagios

    We use nagios based OpsView to monitor our server farm and keep everything running smoothly.

    Avatar of HyVive
    HyVive uses PrometheusPrometheus

    We primarily use Prometheus to gather metrics and statistics to display them in Grafana.

    Avatar of Peter Degen-Portnoy
    Peter Degen-Portnoy uses NagiosNagios

    Monitor web servers, databases, utility servers

    Avatar of Veggie Sailor
    Veggie Sailor uses NagiosNagios

    For the monitoring full stack of the platform.

    Avatar of Bùi Thanh
    Bùi Thanh uses PrometheusPrometheus
    • Simple operation and easy to deploy.
    Avatar of Roy Olsen
    Roy Olsen uses PrometheusPrometheus

    Predictive monitoring.

    How much does Nagios cost?
    How much does Prometheus cost?
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