Create environments

Environments represent your deployment targets (QA, Prod, etc). Each environment contains one or more Infrastructure Definitions that list your target clusters, hosts, namespaces, etc.

Create an environment

You can create environments from:

• Within a pipeline
• Outside a pipeline
• An account
• An Organization

Within a pipeline

To create an environment from inside of a pipeline, select New Environment in the Infrastructure tab of a new CD stage.

Outside a pipeline

To create an Environment from outside of a pipeline, you use Environments in the navigation pane.

From organization or account

You can create an environment and provide infrastructure definitions at an account or organization level from the Harness UI, using APIs or Terraform.

Pipeline Studio

To create an environment at an account or organization level, go to Organization Resources >Environments.

Expand the section below to see a sample account level environment YAML.

Account level environment YAML

environment:
  name: dev
  identifier: dev
  description: account wide dev environment
  tags:
    status: non-regulated
  type: PreProduction
  variables:
    - name: port
      type: String
      value: "8080"
      description: ""
    - name: namespace
      type: String
      value: <+service.name>-dev
      description: "namespace environment variable"

Expand the section below to see a sample account level infrastructure definition YAML.

Account level infrastructure definition YAML

infrastructureDefinition:
  name: dev-k8s
  identifier: dev
  description: development Kubernetes cluster
  tags: {}
  environmentRef: dev
  deploymentType: Kubernetes
  type: KubernetesDirect
  spec:
    connectorRef: account.Harness_Kubernetes_Cluster
    namespace: <+service.name>-dev
    releaseName: release-<+INFRA_KEY>
  allowSimultaneousDeployments: false

Expand the section below to see a sample organization level environment YAML.

Organization level environment YAML

environment:
  name: prod
  identifier: prod
  description: production environment for the organization
  tags:
    status: regulated
  type: Production
  orgIdentifier: default
  variables:
    - name: namespace
      type: String
      value: <+service.name>-prod
      description: "namespace for prod environment"
    - name: port
      type: String
      value: "8080"
      description: "port for prod environment"

Expand the section below to see a sample organization level infrastructure definition YAML.

Organization level infrastructure definition YAML

infrastructureDefinition:
  name: prod-k8s
  identifier: prodk8s
  description: production kubernetes cluster
  tags: {}
  orgIdentifier: default
  environmentRef: prod
  deploymentType: Kubernetes
  type: KubernetesDirect
  spec:
    connectorRef: account.Harness_Kubernetes_Cluster
    namespace: production
    releaseName: release-<+INFRA_KEY>
  allowSimultaneousDeployments: false

API

For information about creating an environment API, go to create an environment.

For information about creating infrastructure definition API, go to create an infrastructure in an environment.

The orgIdentifier and projectIdentifier field definitions are optional, and depend on where you want to create the environment. For example, if you create an environment at an account level, you will not need org or project identifiers in the post API call payload.

Terraform

For information about creating a Harness platform environment, go to harness_platform_environment (Resource).

Expand the section below to see a sample platform environment in Terraform.

Harness platform environment

resource "harness_platform_environment" "example" {
  identifier = "identifier"
  name       = "name"
  org_id     = "org_id"
  project_id = "project_id"
  tags       = ["foo:bar", "baz"]
  type       = "PreProduction"

  ## ENVIRONMENT V2 Update
  ## The YAML is needed if you want to define the Environment Variables and Overrides for the environment
  ## Not Mandatory for Environment Creation nor Pipeline Usage

  yaml = <<-EOT
               environment:
         name: name
         identifier: identifier
         orgIdentifier: org_id
         projectIdentifier: project_id
         type: PreProduction
         tags:
           foo: bar
           baz: ""
         variables:
           - name: envVar1
             type: String
             value: v1
             description: ""
           - name: envVar2
             type: String
             value: v2
             description: ""
         overrides:
           manifests:
             - manifest:
                 identifier: manifestEnv
                 type: Values
                 spec:
                   store:
                     type: Git
                     spec:
                       connectorRef: <+input>
                       gitFetchType: Branch
                       paths:
                         - file1
                       repoName: <+input>
                       branch: master
           configFiles:
             - configFile:
                 identifier: configFileEnv
                 spec:
                   store:
                     type: Harness
                     spec:
                       files:
                         - account:/Add-ons/svcOverrideTest
                       secretFiles: []
      EOT
}

For information about creating a Harness platform infrastructure definition, go to harness_platform_infrastructure (Resource).

Expand the section below to see a sample platform infrastructure definition in Terraform.

Harness platform infrastructure definition

resource "harness_platform_infrastructure" "example" {
  identifier      = "identifier"
  name            = "name"
  org_id          = "orgIdentifer"
  project_id      = "projectIdentifier"
  env_id          = "environmentIdentifier"
  type            = "KubernetesDirect"
  deployment_type = "Kubernetes"
  yaml            = <<-EOT
        infrastructureDefinition:
         name: name
         identifier: identifier
         description: ""
         tags:
           asda: ""
         orgIdentifier: orgIdentifer
         projectIdentifier: projectIdentifier
         environmentRef: environmentIdentifier
         deploymentType: Kubernetes
         type: KubernetesDirect
         spec:
          connectorRef: account.gfgf
          namespace: asdasdsa
          releaseName: release-<+INFRA_KEY>
          allowSimultaneousDeployments: false
      EOT
}

The org_id and project_id field definitions are optional, and depend on where you want to create the environment. For example, if you create an environment at an account level, you will not need org or project identifiers.

Define the environment configuration

In the environment Configuration, you can manage the Name, Description, Tags, and Environment Type of the environment.

You can also set default manifests, specifications, config files, and variables to use whenever Harness deploys a service to this environment.

For example, a stage has a Kubernetes service with a manifest but whenever that service is deployed to the QA environment, the manifest in that environment's Configuration overwrites the namespace of with the manifest in the service with QA.

Create service overrides

Service overrides are different from Environment Configuration in the following ways:

• Environment Configuration: applies to every service that is used with the environment.
• Environment Service Overrides: applies to specific services you select. Whenever that service is used with that environment, the Service Override is applied.

Override priority

When you are using environment configuration and service override to override service settings, it's important to understand the priority of the overrides.

The priority from top to bottom is:

1. Environment service overrides
2. Environment configuration
3. Service settings

Overriding values.yaml

You can specify values YAML files at the environment's Service Overrides and Configuration, and the service itself.

Here is an example of specifying it at the environment's Configuration:

When you have a values yaml file at two or more of the environment Service Overrides, Environment Configuration, and the service itself, Harness merges the files into a single values YAML for deployment. This merging is performed at pipeline execution runtime.

Overriding occurs when the higher priority setting has the same name:value pair as a lower priority setting.

Let's look at two examples.

Merging values.yaml name:value pairs

An environment's Service Overrides values YAML has the name:value pair servicePort: 80 but no replicas name:value.

A service's Service Definition has a values YAML with replicas: 2 but no servicePort name:value.

At runtime, the two values YAML files are merged into one.

The servicePort: 80 from the environment Service Overrides values YAML is merged with the Service Definition's replicas: 2 in the values YAML:

Fully overriding values.yaml name:value pairs

An environment's Service Overrides values YAML has the name:value pairs replicas: 2 and servicePort: 80. 

A service's Service Definition has a values YAML with replicas: 4 and servicePort: 8080. 

At runtime, the name:value pairs from the environment Service Overrides values YAML fully override the service values YAML. The replicas: 2 and servicePort: 80 from the environment Service Overrides are used.

Fully overriding config files and variables

Config files are a black box that can contain multiple formats and content, such as YAML, JSON, plain text, etc. Consequently, they cannot be overridden like Values YAML files.

Variables cannot be partially overridden either. They are completely replaced.

When you have Config files at two or more of the environment Service Overrides, Configuration, and the service itself, the standard override priority is applied.

When you have Variables with the same name at two or more of the environment Service Overrides, Configuration, and the service itself, the standard override priority is applied.

Add infrastructure definitions

Infrastructure definitions represent an environment's infrastructures physically. They are the actual clusters, hosts, namespaces, etc, where you are deploying a service.

An environment can have multiple Infrastructure Definitions. 

When you select an environment in a stage, you can select the Infrastructure Definition to use for that stage.

Define GitOps clusters

When you use Harness GitOps you can add GitOps clusters to an environment. 

To learn more about Harness GitOps, go to Harness GitOps basics.

Next, when you create a pipeline, you can select the environment and the GitOps cluster(s) to use.

GitOps clusters are used in a PR pipeline. A PR pipeline creates and merges a Git PR on the config.json for a destination cluster as part of an ApplicationSet. The PR Pipeline runs, merges a change to the config.json, and a GitOps sync on the ApplicationSet is initiated.

GitOps Clusters are not used in standard CD pipelines. They're used when using GitOps only.

Runtime inputs and expressions in environments

If you use runtime inputs in your environments, you will need to provide values for these when they run pipeline using these environments.

If you use expressions in your environments, Harness must be able to resolve these expressions when users run pipeline using these environments.

Select Runtime input for the environment.

When you run the pipeline, you can select the environment for their runtime inputs.

For more information on runtime inputs and expressions, go to fixed values, runtime inputs, and expressions.