Templated Fields

Skaffold allows for certain fields in the config to be templated with values either from environment variables, or certain special values computed by Skaffold.

build:
  tagPolicy:
    envTemplate:
      template: "{{.FOO}}"
  artifacts:
  - image: gcr.io/k8s-skaffold/example

Suppose the value of the FOO environment variable is v1, the image built will be gcr.io/k8s-skaffold/example:v1.

List of fields that support templating:

• build.artifacts.[].docker.buildArgs (see builders)
• build.tagPolicy.envTemplate.template (see envTemplate tagger)
• deploy.helm.releases.setValueTemplates (see Deploying with helm)
• deploy.helm.releases.name (see Deploying with helm)
• deploy.helm.releases.namespace (see Deploying with helm)
• deploy.helm.releases.version (see Deploying with helm)
• deploy.kubectl.defaultNamespace
• deploy.kustomize.defaultNamespace
• portForward.namespace
• portForward.resourceName

Please note, this list is not exhaustive.

List of variables that are available for templating:

• all environment variables passed to the Skaffold process at startup
• For the envTemplate tagger:
  • IMAGE_NAME - the artifact’s image name - the image name rewriting acts after the template is calculated
• For Helm deployments:
  • IMAGE_NAME, IMAGE_TAG, IMAGE_DIGEST - the first (by order of declaration in build.artifacts) artifact’s image name, tag, and sha256 digest. Note: the image name rewriting acts after the template is calculated.
  • IMAGE_NAME2, IMAGE_TAG2, IMAGE_DIGEST2 - the 2nd artifact’s image name, tag, and sha256 digest
  • IMAGE_NAMEN, IMAGE_TAGN, IMAGE_DIGESTN - the Nth artifact’s image name, tag, and sha256 digest