helm-set

Helm-set plugin allows you to substitute the environment variables specified in your helm values file with their respective values in the environment from within a CICD pipeline. Heavily inspired by Terraform's envsubst feature.

Install

The installation itself is simple as:

helm plugin install https://github.com/bery/helm-set.git

You can install a specific release version:

helm plugin install https://github.com/bery/helm-set.git --version <release version>

To use the plugin, you do not need any special dependencies. The installer will download the latest release with prebuilt binary from GitHub releases.

Usage

Simple usage

Use environment variables as helm values by taking all variables starting with HELM_VAR_ to --set values.

Usage:
  set [command]

Available Commands:
  completion  Generate the autocompletion script for the specified shell
  help        Help about any command
  install     wrapper for helm install, decrypting secrets
  upgrade     wrapper for helm upgrade, decrypting secrets

Flags:
  -d, --debug     enable verbose output
      --dry-run   parameter parsing mode (rename, copy)
  -h, --help      help for set
  -v, --verbose   enable verbose output

Examples

Basic usage

Set the HELM_VAR_replicaCount envrionment variable to 3 by:

export HELM_VAR_replicaCount=3

Replace helm upgrade with helm set upgrade and run:

helm set upgrade --install --dry-run=false <name> <chart>

This will replace the value of replicaCount in the helm upgrade command with the value of the environment variable HELM_VAR_replicaCount.

Result

helm upgrade upgrade --install --dry-run=false <name> <chart> --set replicaCount=3

Nested values

Goal: set value of image.tag to latest and value of image.pullPolicy to Always.

export HELM_VAR_image__tag="latest"
export HELM_VAR_image__pullPolicy="Always"
helm set upgrade --install --dry-run=false <name> <chart>

Result

helm upgrade upgrade --install <name> <chart> --set image.tag="latest" --set image.pullPolicy="Always"

Lists values

export HELM_VAR_list__item___0___path="your_path"
helm set upgrade --install --dry-run=false <name> <chart>

Result

helm upgrade upgrade --install <name> <chart> --set list.item[0].path="your_path"

Uninstall

helm plugin remove helm-set

License

MIT