What's supported by Harness CI

This page describes supported platforms and technologies for Harness CI specifically.

For information about what's supported for other Harness modules and the Harness Platform overall, go to Supported platforms and technologies.

Harness CI supported platforms and technologies

Harness CI supports a variety of platforms, repos, registries, and related technologies. The following sections list entities or providers with first-class support in Harness CI. Additional entities or providers may be supported through unofficial plugins or scripting.

Source Code Management (SCM)

In addition to built-in codebase cloning and support for Git functionality like Git LFS, subdirectory cloning, and PR status checks, Harness CI supports these SCM providers:

• AWS CodeCommit
• Azure Repos
• Bitbucket
• GitHub
• GitLab
• Harness Code Repository
• Other Git providers through the provider-agnostic Git connector

Build infrastructure

Harness CI offers Harness-managed and self-managed build infrastructure options for a variety of operating systems and architectures, including:

• Harness CI Cloud (built in, Harness-managed, Linux/Windows/macOS)
• Local runners (Linux/Windows/macOS)
• Kubernetes clusters:
  • Amazon Elastic Kubernetes Service (Amazon EKS)
  • Google Kubernetes Engine (GKE)
  • Red Hat OpenShift 4
  • Other, platform agnostic
• Self-managed VMs:
  • Microsoft Azure (Linux/Windows)
  • GCP (Linux/Windows)
  • AWS EC2 (Linux/Windows)
  • AWS EC2 (macOS) - Harness recommends Harness CI Cloud for macOS builds due to licensing requirements and the complexity of managing macOS VMs with Anka virtualization.

Container registries

• Azure Container Registry (ACR)
• Amazon Elastic Container Registry (ECR)
• Google Artifact Registry (GAR)
• Google Container Registry (GCR) (pending deprecation)
• Docker-compliant registries, such as Docker Hub, GitHub Container Registry (GHCR), and JFrog Docker registries
• Other

For more information, go to Build and push artifacts and images.

Artifact repositories

• JFrog Artifactory
• AWS S3
• GCP GCS
• Sonatype Nexus
• Other

For more information, go to Build and push artifacts and images.

Dependencies and caching

Harness CI supports running dependent services, such as Docker-in-Docker, LocalStack, and PostgreSQL, in Background steps.

Harness offers several caching options, including:

• Harness Cache Intelligence
• AWS S3
• GCP GCS
• Azure storage

Testing frameworks

Harness CI supports popular testing frameworks, including:

• Bazel
• CTest
• Cucumber
• DOTNET CLI
• Go
• Gradle
• JUnit
• Maven
• Minitest
• Mocha
• NUnit
• PHPUnit
• Pytest
• RSpec
• Sbt
• Unittest
• Other

In addition to supporting various test types and tools, Harness CI also supports time saving and quality control functionality like test selection, code coverage, and test splitting. For more information, go to Run tests in CI pipelines.

Harness CI features

For an overview of key CI features, go to Harness CI overview and Harness CI key concepts.

For information about upcoming and recently released features, go to the CI product roadmap, CI release notes.

Harness CI early access features

Some Harness CI features are released behind feature flags to get feedback from a subset of customers before releasing the features to general availability.

You can opt-in to the early access (beta) features for Harness CI described in the following table. Contact Harness Support to enable specific early access features in your Harness account. Include the feature flag or name with your request.

For more information about early access features, including early access features for the Harness Platform, delegate, and other Harness modules, go to Early access features.

Flag	Description	Availability
CI_ENABLE_DLC_SELF_HOSTED, CI_ENABLE_CACHE_INTEL_SELF_HOSTED	Harness-managed Docker layer caching and Cache Intelligence for self-managed build infrastructures.	Beta
CIE_ENABLE_RUNTEST_V2	Tests V2 step.	Beta
CI_ENABLE_OUTPUT_SECRETS, CI_SKIP_NON_EXPRESSION_EVALUATION	Type selection for output variables in Run steps.	Beta
CI_USE_LESS_STRICT_EVALUATION_FOR_MAP_VARS	Allows empty environment variables in CI pipelines.	Beta
CI_ENABLE_RESOURCE_CLASSES	Support for selecting resource classes in Harness Cloud, which you can use to select specific infrastructure resources.	Beta
CI_ENABLE_OUTPUT_SECRETS, CI_SKIP_NON_EXPRESSION_EVALUATION	Type selection for output variables in Run steps.	Beta
CI_USE_LESS_STRICT_EVALUATION_FOR_MAP_VARS	Allows empty environment variables in CI pipelines.	Beta
CI_ENABLE_DLC, CI_HOSTED_CONTAINERLESS_OOTB_STEP_ENABLED	Docker layer caching for Harness Cloud	Beta
CI_ENABLE_DLC_SELF_HOSTED, CI_ENABLE_CACHE_INTEL_SELF_HOSTED	Default settings that enable you to configure s3-compatible caching in self-hosted build infrastructures. You can configure the endpoint URL, region, bucket name, access key, and secret key. (CI-11953)	Beta
CI_ENABLE_VM_DELEGATE_SELECTOR	Delegate selectors for self-managed VM build infrastructures (CI-11545). With this feature flag enabled, you can use delegate selectors with self-managed VM build infrastructure.	Beta
CI_SECURE_TUNNEL	Secure Connect for Harness Cloud (CI-8922). Secure Connect for Harness Cloud facilitates private networking with Harness Cloud runners.	Beta
CI_CODEBASE_SELECTOR	Delegate selectors for codebase tasks (CI-9980). Without this feature flag enabled, delegate selectors aren't applied to delegate-related CI codebase tasks. With this feature flag enabled, Harness uses your delegate selectors for delegate-related codebase tasks. Delegate selection for these tasks takes precedence in order of pipeline selectors over connector selectors.	Beta
CI_OUTPUT_VARIABLES_AS_ENV	Output variables automatically become environment variables (CI-7817, ZD-39203). With this feature flag enabled, output variables from steps are automatically available as environment variables for other steps in the same Build (CI) stage. This means that, if you have a Build stage with three steps, an output variable produced from step one is automatically available as an environment variable for steps two and three. In other steps in the same stage, you can refer to the output variable by its key without additional identification. For example, an output variable called MY_VAR can be referenced later as simply $MY_VAR. Without this feature flag enabled, you must use an expression to reference where the variable originated, such as <+steps.stepID.output.outputVariables.MY_VAR>. For more information on this feature, go to the documentation on Output variables.	Beta
CI_REMOTE_DEBUG	Remote debugging (CI-8135, CI-8048) Harness CI now supports remote debugging in certain scenarios. You can re-run builds in debug mode through the Builds, Execution, and Execution History pages of the Harness UI. For more information, go to Debug mode. Update (June 2023): Debug mode now supports Python, PowerShell Core (pwsh), and debugging in local runner build infrastructures. Debug mode is not supported in the Self-Managed Enterprise Edition. For more information, go to Debug with SSH	Beta
CI_PYTHON_TI	Test Intelligence for Python.	Beta
TI_DOTNET	Test Intelligence for C#.	Beta
CI_TI_DASHBOARDS_ENABLED	Test report dashboards.	Beta
CI_INDIRECT_LOG_UPLOAD	Enables uploading of logs through log service for certain troubleshooting scenarios, for example, if step logs disappear.	Beta
CI_INCREASE_DEFAULT_RESOURCES	Used to adjust resource allocation limits. This feature flag increases maximum CPU to 1000m and maximum memory to 3000Mi.	Beta
CI_CONSERVATIVE_K8_RESOURCE_LIMITS	Used to adjust resource allocation limits. This feature flag sets lite engine resource limits to the default minimum (100m CPU and 100Mi memory).	Beta

Harness CI features promoted to GA

Features promoted to general availability (GA) are removed from the early access features table and announced as new features in the CI release notes. The CI release notes also include features released directly to GA.

Here are some CI early access features that were recently promoted to GA:

Flag	Description	GA date
CI_ENABLE_DLC, CI_HOSTED_CONTAINERLESS_OOTB_STEP_ENABLED	Harness-managed Docker layer caching for Harness Cloud build infrastructure.	May 2024
CI_CACHE_INTELLIGENCE	You can enable and configure Cache Intelligence in the Pipeline Studio's Visual editor. Cache intelligence is GA for Harness Cloud build infrastructure.	May 2024
CI_BITBUCKET_STATUS_KEY_HASH	Addresses an issue with Harness build status updates in Bitbucket PRs	April 2024
CI_LE_STATUS_REST_ENABLED	Send status updates to Harness Manager directly by HTTP (CI-8338). This feature causes CI steps to send status updates to the Harness Manager directly by HTTP, rather than through a delegate.	Early 2024
QUEUE_CI_EXECUTIONS, QUEUE_CI_EXECUTIONS_CONCURRENCY	Queue Intelligence for Harness Cloud	Early 2024
CDS_GITHUB_APP_AUTHENTICATION	GitHub App authentication for GitHub connectors (CI-8577). You can use a GitHub App as the primary authentication method for a GitHub connector.	December 2023
CI_AI_ENHANCED_REMEDIATIONS	Harness AI Development Assistant (AIDA™️) for CI (CI-8599, CI-8735, CI-9102). The Harness platform leverages Harness AI Development Assistant (AIDA) to revolutionize software delivery processes. By combining AI capabilities with robust DevOps tools, features, and practices, the Harness platform streamlines and accelerates the software delivery lifecycle, and it empowers teams to deliver high-quality applications quickly and efficiently. Its AI-driven predictive analytics, continuous verification, and advanced release orchestration capabilities empower teams to drive innovation, improve efficiency, and ultimately deliver exceptional user experiences. In Harness CI, AIDA provides auto-recognition of failures in pipelines. The root cause analysis (RCA) option generates recommendations for step failures in pipelines. Harness bases these recommendations on the step logs and the context of the failed step. For more information, go to Troubleshooting with AIDA.	October 2023
CI_DOCKER_INFRASTRUCTURE	Local runner build infrastructure (CI-5680) A Harness Docker delegate that you can install directly on a host. For more information, go to Set up a local runner build infrastructure.	Early 2023