yxxheroandcopilot-swe-agent[bot] 9fa0529304 fix: apply post-renderer to output-dir-template output (#2531)
* fix: apply post-renderer to output-dir-template output

When --output-dir and --post-renderer are both passed to helm template,
Helm writes pre-post-renderer content to files and sends post-renderer
output to stdout. This workaround strips --output-dir from helm flags,
captures the post-renderer-processed stdout, and writes it to the output
directory.

Fixes #2515

Signed-off-by: yxxhero <aiopsclub@163.com>

* test: add integration test for issue-2515 (post-renderer with output-dir-template)

Verifies that --post-renderer output is written to files when
--output-dir-template is set, instead of pre-renderer content.

Signed-off-by: yxxhero <aiopsclub@163.com>

* fix: address review comments - correct HasPrefix args, fix output dir structure, fix test mock init

Agent-Logs-Url: https://github.com/helmfile/helmfile/sessions/33d92423-fc47-4080-8307-5af9b16dd9c6

Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>

* fix: wrap file operation errors with context in post-renderer workaround

Agent-Logs-Url: https://github.com/helmfile/helmfile/sessions/33d92423-fc47-4080-8307-5af9b16dd9c6

Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>

* fix: correct chart path and use absolute case dir path in integration test

Agent-Logs-Url: https://github.com/helmfile/helmfile/sessions/43b7a794-1e7b-4577-8829-deb544a1a105

Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>

* fix: restrict --output-dir + --post-renderer workaround to Helm 3 only

Agent-Logs-Url: https://github.com/helmfile/helmfile/sessions/229b14e2-b1ad-4f19-bd00-b8f7821383cd

Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>

* fix: clean up stale templates dir on re-runs in Helm 3 post-renderer workaround

Agent-Logs-Url: https://github.com/helmfile/helmfile/sessions/f6c66284-8eca-4db3-8711-c9b6d3a9c179

Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>

* fix: detect --post-renderer=<path> form and use targeted file cleanup

Agent-Logs-Url: https://github.com/helmfile/helmfile/sessions/8c9e4af4-84ae-4cbd-bc0a-8fcd9adddaed

Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>

* feat: add Helm 4 post-renderer plugin and enable Helm 4 issue-2515 integration test

Agent-Logs-Url: https://github.com/helmfile/helmfile/sessions/3da2949c-a9d6-4e16-9b4a-a7e241080089

Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>

* fix: search recursively for YAML files in Helm 4 output-dir integration test

Agent-Logs-Url: https://github.com/helmfile/helmfile/sessions/c5d33143-f611-40db-b73a-e5189d944ffd

Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>

* fix: limit find depth and truncate log in Helm 4 integration test fallback message

Agent-Logs-Url: https://github.com/helmfile/helmfile/sessions/c5d33143-f611-40db-b73a-e5189d944ffd

Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>

---------

Signed-off-by: yxxhero <aiopsclub@163.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
2026-04-28 09:01:48 +08:00
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Helmfile

Tests Container Image Repository on GHCR Go Report Card Slack Community #helmfile Documentation Gurubase zread

Deploy Kubernetes Helm Charts

English | 简体中文

About

Helmfile is a declarative spec for deploying helm charts. It lets you...

  • Keep a directory of chart value files and maintain changes in version control.
  • Apply CI/CD to configuration changes.
  • Periodically sync to avoid skew in environments.

To avoid upgrades for each iteration of helm, the helmfile executable delegates to helm - as a result, the following must be installed

Highlights

Declarative: Write, version-control, apply the desired state file for visibility and reproducibility.

Modules: Modularize common patterns of your infrastructure, distribute it via Git, S3, etc. to be reused across the entire company (See #648)

Versatility: Manage your cluster consisting of charts, kustomizations, and directories of Kubernetes resources, turning everything to Helm releases (See #673)

Patch: JSON/Strategic-Merge Patch Kubernetes resources before helm-installing, without forking upstream charts (See #673)

Status

May 2025 Update

  • Helmfile v1.0 and v1.1 has been released. We recommend upgrading directly to v1.1 if you are still using v0.x.
  • If you haven't already upgraded, please go over this v1 proposal here to see a small list of breaking changes.

Installation

1: Binary Installation

download one of releases

2: Package Manager

  • Archlinux: install via pacman -S helmfile
  • openSUSE: install via zypper in helmfile assuming you are on Tumbleweed; if you are on Leap you must add the kubic repo for your distribution version once before that command, e.g. zypper ar https://download.opensuse.org/repositories/devel:/kubic/openSUSE_Leap_\$releasever kubic
  • Windows (using scoop): scoop install helmfile
  • macOS (using homebrew): brew install helmfile
  • Linux/macOS/Windows (using mise): mise use -g helmfile@latest

3: Container

For more details, see run as a container

Make sure to run helmfile init once after installation. Helmfile uses the helm-diff plugin.

Getting Started

Let's start with a simple helmfile and gradually improve it to fit your use-case!

Suppose the helmfile.yaml representing the desired state of your helm releases looks like:

repositories:
- name: prometheus-community
  url: https://prometheus-community.github.io/helm-charts

releases:
- name: prom-norbac-ubuntu
  namespace: prometheus
  chart: prometheus-community/prometheus
  set:
  - name: rbac.create
    value: false

Sync your Kubernetes cluster state to the desired one by running:

helmfile apply

Congratulations! You now have your first Prometheus deployment running inside your cluster.

Iterate on the helmfile.yaml by referencing:

More complex examples

See: multi-env-helmfile

Docs

Please read complete documentation

Contributing

Welcome to contribute together to make helmfile better: contributing doc

Attribution

We use:

  • semtag for automated semver tagging. I greatly appreciate the author(pnikosis)'s effort on creating it and their kindness to share it!

Users

Helmfile has been used by many users in production:

For more users, please see: Users

License

MIT

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