README.md
# Helmify
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[](https://goreportcard.com/report/github.com/arttor/helmify)
[](https://pkg.go.dev/github.com/arttor/helmify?tab=doc)
CLI that creates [Helm](https://github.com/helm/helm) charts from kubernetes manifests.
Helmify reads a list of [supported k8s objects](#status) from stdin and converts it to a helm chart.
Designed to generate charts for [k8s operators](#integrate-to-your-operator-sdkkubebuilder-project) but not limited to.
See [examples](https://github.com/arttor/helmify/tree/main/examples) of charts generated by helmify.
Supports `Helm >=v3.6.0`
Submit issue if some features missing for your use-case.
## Usage
1) As pipe:
```shell
cat my-app.yaml | helmify mychart
```
Will create 'mychart' directory with Helm chart from yaml file with k8s objects.
```shell
awk 'FNR==1 && NR!=1 {print "---"}{print}' /<my_directory>/*.yaml | helmify mychart
```
Will create 'mychart' directory with Helm chart from all yaml files in `<my_directory> `directory.
2) From filesystem:
```shell
helmify -f /my_directory/my-app.yaml mychart
```
Will create 'mychart' directory with Helm chart from `my_directory/my-app.yaml`.
```shell
helmify -f /my_directory mychart
```
Will create 'mychart' directory with Helm chart from all yaml files in `<my_directory> `directory.
```shell
helmify -f /my_directory -r mychart
```
Will create 'mychart' directory with Helm chart from all yaml files in `<my_directory> `directory recursively.
```shell
helmify -f ./first_dir -f ./second_dir/my_deployment.yaml -f ./third_dir mychart
```
Will create 'mychart' directory with Helm chart from multiple directories and files.
3) From [kustomize](https://kustomize.io/) output:
```shell
kustomize build <kustomize_dir> | helmify mychart
```
Will create 'mychart' directory with Helm chart from kustomize output.
### Integrate to your Operator-SDK/Kubebuilder project
1. Open `Makefile` in your operator project generated by
[Operator-SDK](https://github.com/operator-framework/operator-sdk) or [Kubebuilder](https://github.com/kubernetes-sigs/kubebuilder).
2. Add these lines to `Makefile`:
- With operator-sdk version < v1.23.0
```makefile
HELMIFY = $(shell pwd)/bin/helmify
helmify:
$(call go-get-tool,$(HELMIFY),github.com/arttor/helmify/cmd/helmify@v0.3.7)
helm: manifests kustomize helmify
$(KUSTOMIZE) build config/default | $(HELMIFY)
```
- With operator-sdk version >= v1.23.0
```makefile
HELMIFY ?= $(LOCALBIN)/helmify
.PHONY: helmify
helmify: $(HELMIFY) ## Download helmify locally if necessary.
$(HELMIFY): $(LOCALBIN)
test -s $(LOCALBIN)/helmify || GOBIN=$(LOCALBIN) go install github.com/arttor/helmify/cmd/helmify@latest
helm: manifests kustomize helmify
$(KUSTOMIZE) build config/default | $(HELMIFY)
```
3. Run `make helm` in project root. It will generate helm chart with name 'chart' in 'chart' directory.
## Install
With [Homebrew](https://brew.sh/) (for MacOS or Linux): `brew install arttor/tap/helmify`
Or download suitable for your system binary from [the Releases page](https://github.com/arttor/helmify/releases/latest).
Unpack the helmify binary and add it to your PATH and you are good to go!
## Available options
Helmify takes a chart name for an argument.
Usage:
```helmify [flags] CHART_NAME``` - `CHART_NAME` is optional. Default is 'chart'. Can be a directory, e.g. 'deploy/charts/mychart'.
| flag | description | sample |
|---------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------|
| -h -help | Prints help | `helmify -h` |
| -f | File source for k8s manifests (directory or file), multiple sources supported | `helmify -f ./test_data` |
| -r | Scan file directory recursively. Used only if -f provided | `helmify -f ./test_data -r` |
| -v | Enable verbose output. Prints WARN and INFO. | `helmify -v` |
| -vv | Enable very verbose output. Also prints DEBUG. | `helmify -vv` |
| -version | Print helmify version. | `helmify -version` |
| -crd-dir | Place crds in their own folder per Helm 3 [docs](https://helm.sh/docs/chart_best_practices/custom_resource_definitions/#method-1-let-helm-do-it-for-you). Caveat: CRDs templating is not supported by Helm. | `helmify -crd-dir` |
| -image-pull-secrets | Allows the user to use existing secrets as imagePullSecrets | `helmify -image-pull-secrets` |
| -cert-manager-as-subchart | Allows the user to install cert-manager as a subchart | `helmify -cert-manager-as-subchart` |
| -cert-manager-version | Allows the user to specify cert-manager subchart version. Only useful with cert-manager-as-subchart. (default "v1.12.2") | `helmify -cert-manager-as-subchart` |
## Status
Supported k8s resources:
- Deployment, DaemonSet, StatefulSet
- Job, CronJob
- Service, Ingress
- PersistentVolumeClaim
- RBAC (ServiceAccount, (cluster-)role, (cluster-)roleBinding)
- configs (ConfigMap, Secret)
- webhooks (cert, issuer, ValidatingWebhookConfiguration)
- custom resource definitions (CRD)
### Known issues
- Helmify will not overwrite `Chart.yaml` file if presented. Done on purpose.
- Helmify will not delete existing template files, only overwrite.
- Helmify overwrites templates and values files on every run.
This means that all your manual changes in helm template files will be lost on the next run.
- if switching between the using the `-crd-dir` flag it is better to delete and regenerate the from scratch to ensure crds are not accidentally spliced/formatted into the same chart. Bear in mind you will want to update your `Chart.yaml` thereafter.
## Develop
To support a new type of k8s object template:
1. Implement `helmify.Processor` interface. Place implementation in `pkg/processor`. The package contains
examples for most k8s objects.
2. Register your processor in the `pkg/app/app.go`
3. Add relevant input sample to `test_data/kustomize.output`.
### Run
Clone repo and execute command:
```shell
cat test_data/k8s-operator-kustomize.output | go run ./cmd/helmify mychart
```
Will generate `mychart` Helm chart form file `test_data/k8s-operator-kustomize.output` representing typical operator
[kustomize](https://github.com/kubernetes-sigs/kustomize) output.
### Test
For manual testing, run program with debug output:
```shell
cat test_data/k8s-operator-kustomize.output | go run ./cmd/helmify -vv mychart
```
Then inspect logs and generated chart in `./mychart` directory.
To execute tests, run:
```shell
go test ./...
```
Beside unit-tests, project contains e2e test `pkg/app/app_e2e_test.go`.
It's a go test, which uses `test_data/*` to generate a chart in temporary directory.
Then runs `helm lint --strict` to check if generated chart is valid.