helmfile "environment ... is not defined" in CI

By Kaveh Alemi·Latchkey

You ran helmfile with --environment name, but no environment by that name exists under the environments: block. helmfile refuses to proceed because it cannot resolve which values to load.

What this error means

helmfile fails with "err: environment \"staging\" is not defined" right after startup, before any release is processed.

err: environment "staging" is not defined

Common causes

A typo or missing entry in the environments block

The --environment name does not match any key under environments:, often a typo like staging versus stage.

The environments block is in a different helmfile

A split layout defines the environment in another file that the current invocation does not load.

How to fix it

Define the environment or match its name

1. List the keys under environments: in helmfile.yaml.
2. Pass --environment with an exact match, or add the missing environment.
3. Re-run to confirm helmfile loads the environment values.

environments:
  staging:
    values:
      - environments/staging.yaml
  production:
    values:
      - environments/production.yaml

Pass the environment flag correctly

Use the environment name exactly as declared; helmfile is case sensitive.

helmfile --environment staging apply

How to prevent it

• Keep environment names consistent between CI and helmfile.yaml.
• Declare a default environment so bare invocations still resolve.
• Run helmfile build per environment to validate them in CI.

Frequently asked questions

Related guides

References

• Kubernetes documentation
• GitHub Actions documentation