Configuration

Configuration should be checked into your repository and injected to your application via environment variables. Configuration can be broken into two categories:

1. Common Configuration
2. Environment Specific Configuration

See sensitive configuration for secrets.

Common Configuration

• Add values to a file called /config/common.yaml to your repository.

In the format:

service:
    environmentVariables: 
        MODE: default
        DATABASE_HOSTNAME: common-database-url

Environment Specific Configuration

• Add an environment specific file called /config/env.yaml e.g. /config/integration.yaml to your repository.

service:
    environmentVariables: 
        MODE: default
        DATABASE_HOSTNAME: integration-database-url

Injecting the configuration

Inject .Values.service.environmentVariables as environment variables to the application via a block in the containers: definition, in the Deployment manifest, like:

{{- if .Values.service.environmentVariables }}
          env:
            {{- range $key, $value := .Values.service.environmentVariables }}
            - name: {{ $key }}
              value: {{ $value }}
          {{- end }}
{{- end }}

Pass the files to the helm install on deploy:

deploy-integration:  
    helm upgrade --install $(app_name) helm-charts/app -n $(tenant_name)-integration \
        -f /config/common.yaml \
        -f /config/integration.yaml \
      ...