Open-Source DevOps · sensu

sensu-go

Sensu Go is an open-source, Go-based monitoring and alerting system designed for ephemeral infrastructure and cloud environments. It uses an agent-based architecture with built-in auto-discovery and embeds etcd for persistence, eliminating the need for external message brokers like Redis or RabbitMQ.

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Source: GitHub — github.com/sensu/sensu-go

1.1k

GitHub stars

182

Forks

Primary language

MIT

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	sensu/sensu-go
Owner	sensu
Primary language	Go
License	MIT — OSI-approved
Stars	1.1k
Forks	182
Open issues	279
Latest release	v6.14.2 (2026-06-15)
Last updated	2026-07-01
Source	https://github.com/sensu/sensu-go

What sensu-go is

Sensu Go is a complete rewrite of the original Sensu in Go, featuring an embedded etcd datastore, JavaScript filter expressions for event processing, and a RESTful API for configuration and data access. The system comprises three main components: sensu-agent, sensu-backend, and sensuctl CLI, with the web UI now maintained as a separate project.

Quickstart

Get the sensu-go source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/sensu/sensu-go.git2cd sensu-go3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

Kubernetes and Container Monitoring

Sensu's agent-based architecture and auto-discovery make it well-suited for monitoring ephemeral containers and dynamic cloud infrastructure where traditional static monitoring falls short.

Multi-Cloud and Distributed Systems Monitoring

Built for distributed applications across multiple cloud providers, Sensu provides centralized observability and alerting with reduced operational overhead compared to the original Sensu.

Custom Monitoring Workflows

Sensu's extensibility and 'monitoring router' design allow teams to build custom checks, handlers, and filters using JavaScript expressions and well-defined APIs.

Implementation considerations

Requires Go >= 1.18 to build from source; official Docker images and installer packages are available for common platforms (Debian/Ubuntu, RHEL/CentOS).
Web UI (as of v6.0+) is a separate product; budget for installing and maintaining the sensu/web repository alongside the backend.
Embedded etcd is default but can be replaced with external etcd for HA/multi-node setups; architectural decision needed early in deployment planning.
JavaScript filter expressions replace Ruby; team must be comfortable with JS syntax or invest in training/templates.
CircleCI-based build pipeline is active; verify supply chain security expectations for your environment.

When to avoid it — and what to weigh

Minimal Operational Overhead Required — While simpler than original Sensu, Sensu Go still requires managing agents, a backend, and etcd; teams needing zero-touch monitoring should evaluate fully managed SaaS alternatives.
Deeply Embedded Nagios/Icinga Workflows — If your team has extensive plugin ecosystems or configurations tied to traditional Nagios-style monitoring, the transition to Sensu's agent-based model and JavaScript filters requires significant rewriting.
Real-Time Compliance or Immutable Audit Trails Required — No explicit guarantee of immutable event logging or compliance-grade audit trails is stated; requires detailed security and compliance review before use in regulated environments.
Simple SNMP/Polling-Only Monitoring — If your infrastructure needs only basic polling or SNMP monitoring without agent deployment, simpler dedicated tools may be more appropriate.

License & commercial use

Licensed under the MIT License, a permissive OSI-approved open-source license. MIT permits free use, modification, and distribution with minimal restrictions.

MIT License allows commercial use without requiring payment or special permission. However, the README notes that Sensu Go is the upstream for Sensu Enterprise, and enterprise-only features can be unlocked with a license key. For production deployments or commercial use, verify licensing terms directly with Sensu and review whether enterprise features are required for your use case.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Strong
License clarity	Clear
Deployment complexity	Moderate
DEV.co fit	Good
Assessment confidence	High

Security considerations

No explicit security audit, penetration test results, or CVE history provided in data. Considerations: (1) Embedded etcd must be secured (auth, TLS); (2) Agent-to-backend communication requires encryption; (3) JavaScript filter expressions introduce code injection risk if filters are user-supplied; (4) API authentication and RBAC must be configured; (5) No statement on secrets management, audit logging, or compliance certifications. Requires threat modeling and security review before production deployment in regulated environments.

Alternatives to consider

Prometheus + Alertmanager

Mature, pull-based monitoring for modern cloud-native environments; simpler operational model but less agent-based discovery and custom handler routing than Sensu.

Datadog / New Relic

Fully managed SaaS alternatives eliminate on-premises operational overhead; higher cost but no infrastructure maintenance or security responsibility.

Nagios / Icinga

Traditional agent-based monitoring with extensive plugin ecosystem; older architecture but familiar to legacy ops teams; lacks cloud-native ephemeral infrastructure support.

Software development agency

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sensu-go FAQ

Does Sensu Go require external dependencies like Redis or RabbitMQ?

No. Sensu Go embeds etcd by default for persistence, eliminating the need for external message brokers. External etcd can be used for distributed deployments.

Can I use the original Sensu plugins with Sensu Go?

Not directly. Sensu Go uses a different architecture and JavaScript filter expressions instead of Ruby. Plugins must be rewritten or adapted to the Sensu Go service check and handler model.

Is the web UI included in Sensu Go binaries?

No. As of v6.0, the web UI is a separate product in the sensu/web repository. It must be installed and maintained independently from the backend.

What license applies to commercial use?

MIT License permits commercial use freely. However, Sensu also offers an Enterprise version with additional features unlocked via license key; review with Sensu if enterprise features are needed.

Custom software development services

From first prototype to production, DEV.co delivers software development services around tools like sensu-go. Our software development agency staffs experienced software developers and web developers for custom software development, web development, integrations, and ongoing support across open-source devops and beyond.

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