example.md

Deploying Nginx with Different Image Versions for Dev and Prod Environments

nginx-chart/
│
├── Chart.yaml    
│
├── charts/             # initially empty
│
├── templates/          # Templates
│   ├── deployment.yaml   
│   └── service.yaml

|                       # Values
├── values.yaml             # Base 
├── values-dev.yaml         # Dev 
└── values-prod.yaml        # Prod 

• Use

  • Release 1 (my-prod-release)

    • helm install my-prod-release path_to_dir -f values-prod.yaml

      • my-prod-release - unique name for release
      • _path_to_dir path to dir containing Chart.yaml
      • values-prod.yaml values to inject

      This creates a new release in multiple steps:

      • 1). renders manifest files (ie creates with values injected) for kubectl, in-memory
      • 2).calls kubectl apply -f on these files
      • 3).stores release metadata in a Kubernetes secret
        • can subsequently be queried with helm ls and helm status

      • helm template my-prod-release.......<same parms as install> only does 1) above - and prints to stdout

        • > local_file.yaml if you want to save manifests aslocal file

  • Release 2 (my-dev-release)

    • helm install my-dev-release nginx-chart -f values-dev.yaml