feat/helmChart: initial support for installing the operator using helm charts

charts/dragonfly-operator/.helmignore

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+# 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/dragonfly-operator/Chart.yaml

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+apiVersion: v2
+name: dragonfly-operator
+description: A Helm chart for dragonfly-operator
+
+# 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: "v1.1.2"

charts/dragonfly-operator/templates/_helpers.tpl

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+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "dragonfly-operator.name" -}}
+{{- default .Chart.Name .Values.nameOverride | 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 "dragonfly-operator.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 "dragonfly-operator.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "dragonfly-operator.labels" -}}
+helm.sh/chart: {{ include "dragonfly-operator.chart" . }}
+{{ include "dragonfly-operator.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+app.kubernetes.io/created-by: {{ include "dragonfly-operator.name" . }}
+app.kubernetes.io/part-of: {{ include "dragonfly-operator.name" . }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "dragonfly-operator.selectorLabels" -}}
+control-plane: controller-manager
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "dragonfly-operator.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "dragonfly-operator.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

charts/dragonfly-operator/templates/clusterrolebindings.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ include "dragonfly-operator.fullname" . }}-manager-clusterrolebinding
+  labels:
+    {{- include "dragonfly-operator.labels" . | nindent 4 }}
+    app.kubernetes.io/component: rbac
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ include "dragonfly-operator.fullname" . }}-manager-role
+subjects:
+  - kind: ServiceAccount
+    name: {{ include "dragonfly-operator.serviceAccountName" . }}
+    namespace: {{ .Release.Namespace }}
+---
+
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ include "dragonfly-operator.fullname" . }}-proxy-clusterrolebinding
+  labels:
+    {{- include "dragonfly-operator.labels" . | nindent 4 }}
+    app.kubernetes.io/component: kube-rbac-proxy
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ include "dragonfly-operator.fullname" . }}-proxy-role
+subjects:
+  - kind: ServiceAccount
+    name: {{ include "dragonfly-operator.serviceAccountName" . }}
+    namespace: {{ .Release.Namespace }}

charts/dragonfly-operator/templates/clusterroles.yaml

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+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ include "dragonfly-operator.fullname" . }}-manager-role
+  labels:
+    {{- include "dragonfly-operator.labels" . | nindent 4 }}
+rules:
+  - apiGroups:
+      - ""
+    resources:
+      - events
+    verbs:
+      - create
+      - patch
+  - apiGroups:
+      - ""
+    resources:
+      - pods
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - ""
+    resources:
+      - services
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - apps
+    resources:
+      - statefulsets
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - dragonflydb.io
+    resources:
+      - dragonflies
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - dragonflydb.io
+    resources:
+      - dragonflies/finalizers
+    verbs:
+      - update
+  - apiGroups:
+      - dragonflydb.io
+    resources:
+      - dragonflies/status
+    verbs:
+      - get
+      - patch
+      - update
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ include "dragonfly-operator.fullname" . }}-metrics-reader
+  labels:
+    {{- include "dragonfly-operator.labels" . | nindent 4 }}
+    app.kubernetes.io/component: kube-rbac-proxy
+    app.kubernetes.io/instance: metrics-reader
+rules:
+  - nonResourceURLs:
+      - /metrics
+    verbs:
+      - get
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ include "dragonfly-operator.fullname" . }}-proxy-role
+  labels:
+    {{- include "dragonfly-operator.labels" . | nindent 4 }}
+    app.kubernetes.io/component: kube-rbac-proxy
+    app.kubernetes.io/instance: proxy-role
+rules:
+  - apiGroups:
+      - authentication.k8s.io
+    resources:
+      - tokenreviews
+    verbs:
+      - create
+  - apiGroups:
+      - authorization.k8s.io
+    resources:
+      - subjectaccessreviews
+    verbs:
+      - create