Open-Source DevOps · harness

harness

Harness is an open-source DevOps platform that combines source control, CI/CD pipelines, hosted development environments, and artifact registries into a single system. It evolved from the Drone CI project and aims to provide an all-in-one alternative to managing separate tools for code hosting and pipeline automation.

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Source: GitHub — github.com/harness/harness

37.2k

GitHub stars

3.3k

Forks

Primary language

Apache-2.0

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	harness/harness
Owner	harness
Primary language	Go
License	Apache-2.0 — OSI-approved
Stars	37.2k
Forks	3.3k
Open issues	106
Latest release	v2.28.2 (2026-04-20)
Last updated	2026-07-07
Source	https://github.com/harness/harness

What harness is

Written in Go with a Node.js frontend, Harness runs as a containerized application exposing REST APIs and a web UI. It integrates with Docker for pipeline execution, supports gRPC/protobuf for service communication, and includes a registry conformance layer for artifact management.

Quickstart

Get the harness source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/harness/harness.git2cd harness3# follow the project's README for install & configuration

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

Best use cases

Self-hosted GitOps platform for teams migrating from Drone

Organizations using Drone CI can adopt Harness as a next-generation replacement with expanded capabilities (source control, environments, registries) while a feature-parity branch maintains Drone compatibility.

Integrated development workflow without external SaaS dependencies

Teams requiring a single system for code hosting, CI/CD automation, and artifact management in air-gapped or regulated environments benefit from Harness's all-in-one architecture.

Docker-native pipeline execution with local development

Projects leveraging Docker containerization and seeking portable, socket-based pipeline execution that works across Docker Desktop, Rancher Desktop, Colima, and native Linux Docker setups.

Implementation considerations

Development environment requires Go 1.20+, Node.js, protobuf v3.21.11, and protoc-gen-go/grpc tools; setup complexity is moderate and documented.
Docker socket access at `/var/run/docker.sock` is required by default; alternative runtimes need environment variable configuration or symlinks.
Persistent storage via volume mount is mandatory for data and repositories; lose the volume and all data is lost—named volumes or bind mounts are strongly recommended.
Local development runs via `./gitness server .local.env`, but production Docker deployment uses `harness/harness` image and exposes ports 3000 (web/API) and 3022 (SSH for git).
REST API and Swagger endpoints are available at `/swagger` and `/openapi.yaml`; registry-specific APIs are at `/registry/swagger/` (to be consolidated later).

When to avoid it — and what to weigh

Requiring feature parity with mature Drone deployments immediately — The README explicitly states Harness is still reaching parity with Drone; teams heavily invested in Drone's feature set should use the maintained drone branch or evaluate readiness.
Need for enterprise SaaS with managed uptime SLAs — Harness Open Source is self-hosted only. If your organization requires managed services, support contracts, and guaranteed uptime, commercial SaaS platforms are more appropriate.
Minimal operational overhead or no internal DevOps capacity — Deploying and maintaining Harness (database, Docker socket permissions, volume management, networking) requires operational knowledge; teams with no infrastructure team should prefer hosted alternatives.
Non-Docker pipeline execution or legacy build system dependencies — Harness pipelines run exclusively in Docker containers. Projects requiring direct OS-level agents, bare-metal execution, or integration with non-containerized build tools will not fit.

License & commercial use

Apache License 2.0 (Apache-2.0) is a permissive OSI-approved license allowing commercial use, modification, and distribution with attribution and liability disclaimers.

Apache-2.0 permits commercial use, but this is the open-source distribution. Harness (the company) likely offers commercial products/support separately. Verify commercial support, SLAs, and trademark usage with Harness Inc. before commercial deployment. No warranty is provided by the license.

DEV.co evaluation signals

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

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

Security considerations

Docker socket access (`/var/run/docker.sock`) grants significant privileges; pipeline execution is container-isolated but socket exposure risk must be evaluated for multi-tenant scenarios. Default credentials (admin/changeit) are documented for local setup—must be changed in production. No explicit security audit, vulnerability disclosure policy, or SBOM data provided. Persistent volume access control and authentication token management (PAT tokens) are operational concerns requiring hardening.

Alternatives to consider

GitLab Community Edition

Full-featured self-hosted DevOps platform (source control, CI/CD, registries) with stronger community maturity; steeper operational overhead but more ecosystem integrations.

Gitea + Woodpecker CI

Lightweight self-hosted Git server (Gitea) paired with Woodpecker CI (Drone fork); modular approach avoids monolithic deployment but requires managing two systems.

Jenkins + Gitea/Forgejo

Mature, extensible CI/CD (Jenkins) with self-hosted Git alternatives; wider plugin ecosystem but older codebase and steeper operational complexity.

Software development agency

Build on harness with DEV.co software developers

Review deployment requirements, Docker integration, and Drone migration path. Test locally with docker run or review developer.harness.io for production planning.

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harness FAQ

Can I migrate from Drone to Harness without rewriting pipelines?

README states the goal is eventual feature parity; a snapshot branch `drone` maintains Drone development. Current main branch Harness is not yet at parity, so migration may require validation of specific pipeline features before committing.

What are the hardware/resource requirements?

Not specified in the data provided. Docker image pulls suggest containerized deployment is standard; review Harness documentation or test with representative workloads in your environment.

Does Harness support non-Docker pipeline execution?

No. Pipelines execute exclusively in Docker containers. Direct OS agents or Kubernetes runners are not documented.

Is commercial support available?

Unknown from this data. Harness Inc. operates the project and likely offers commercial products; contact their sales or check developer.harness.io for support offerings.

Software development & web development with DEV.co

From first prototype to production, DEV.co delivers software development services around tools like harness. 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.

Evaluate Harness for Your Team

Review deployment requirements, Docker integration, and Drone migration path. Test locally with docker run or review developer.harness.io for production planning.

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