Add Helm chart

Signed-off-by: zeroalphat <taichi-takemura@cybozu.co.jp>

Author: zeroalphat

Makefile

@@ -21,8 +21,13 @@ help: ## Display this help.
 	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n"} /^[a-zA-Z_0-9-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)
 
 .PHONY: manifests
-manifests: controller-gen ## Generate WebhookConfiguration, ClusterRole and CustomResourceDefinition objects.
+manifests: controller-gen kustomize yq ## Generate WebhookConfiguration, ClusterRole and CustomResourceDefinition objects.
+	rm -rf charts/ofen/templates/generated/
+	mkdir -p charts/ofen/templates/generated/crds/
 	$(CONTROLLER_GEN) rbac:roleName=imageprefetch-controller-role crd paths="./..." output:crd:artifacts:config=config/crd/bases
+	echo '{{- if .Values.crds.enabled }}' > charts/ofen/templates/generated/crds/ofen_crds.yaml	
+	$(KUSTOMIZE) build config/crd | $(YQ) e "." - >> charts/ofen/templates/generated/crds/ofen_crds.yaml
+	echo '{{- end }}' >> charts/ofen/templates/generated/crds/ofen_crds.yaml
 
 .PHONY: generate
 generate: controller-gen ## Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations.
@@ -138,6 +143,7 @@ GINKGO = $(LOCALBIN)/ginkgo
 APPLYCONFIGURATION_GEN = $(LOCALBIN)/applyconfiguration-gen
 MODELS_SCHEMA = $(LOCALBIN)/models-schema
 KAPTEST ?= $(LOCALBIN)/kaptest
+YQ ?= $(LOCALBIN)/yq
 
 ## Tool Versions
 KUSTOMIZE_VERSION ?= v5.6.0
@@ -148,6 +154,7 @@ GINKGO_VERSION ?= v2.23.4
 CODE_GENERATOR_VERSION ?= v0.31.1
 MODELS_SCHEMA_VERSION ?= v1.31.1
 KAPTEST_VERSION ?= v0.1.2
+YQ_VERSION ?= v4.47.1
 
 .PHONY: kustomize
 kustomize: $(KUSTOMIZE) ## Download kustomize locally if necessary.
@@ -196,6 +203,15 @@ $(KAPTEST): $(LOCALBIN)
 	tar -xzf kaptest_Linux_x86_64.tar.gz -C $(LOCALBIN) kaptest && \
 	rm -f kaptest_Linux_x86_64.tar.gz
 
+.PHONY: yq
+yq: $(YQ) ## Download yq locally if necessary.
+$(YQ): $(LOCALBIN)
+	curl -sLO "https://github.com/mikefarah/yq/releases/download/$(YQ_VERSION)/yq_linux_amd64.tar.gz" && \
+	tar -xzf yq_linux_amd64.tar.gz ./yq_linux_amd64 && \
+	mv yq_linux_amd64 $(YQ) && \
+	chmod +x $(YQ) && \
+	rm -f yq_linux_amd64.tar.gz
+
 # go-install-tool will 'go install' any package with custom target and name of binary, if it doesn't exist
 # $1 - target path with name of binary
 # $2 - package url which can be installed

charts/ofen/.helmignore

@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/ofen/Chart.yaml

@@ -0,0 +1,24 @@
+apiVersion: v2
+name: ofen
+description: Ofen is a kubernetes controller that prefetch(preheat) container images.
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+# It is recommended to use it with quotes.
+appVersion: "0.1.0"

charts/ofen/templates/NOTES.txt

@@ -0,0 +1,42 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "ofen.name" -}}
+{{- default .Chart.Name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "ofen.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "ofen.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "ofen.labels" -}}
+helm.sh/chart: {{ include "ofen.chart" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}