feat(helm): basic helm chart

definitelly not complete helm chart. Lot of RBAC stuff is missing for
now.

Signed-off-by: Hy3n4 <[email protected]>

helm/osko/.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/

helm/osko/Chart.yaml

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+apiVersion: v2
+name: osko
+description: Base Helm chart for OSKO
+
+# 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: "1.16.0"
+
+home: https://github.com/oskoperator/osko

helm/osko/templates/NOTES.txt

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+1. OpenSLO Kubernetes Operator is installed in the cluster

helm/osko/templates/_helpers.tpl

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

helm/osko/templates/cluster-role-binding.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  labels:
+    {{- include "osko.labels" . | nindent 4 }}
+  name: {{ include "osko.fullname" . }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ include "osko.fullname" . }}
+subjects:
+  - kind: ServiceAccount
+    name: {{ include "osko.fullname" . }}
+    namespace: {{ .Release.Namespace }}

helm/osko/templates/cluster-role.yaml

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+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ include "osko.fullname" . }}
+rules:
+  - apiGroups:
+      - ""
+    resources:
+      - events
+    verbs:
+      - create
+      - patch
+  - apiGroups:
+      - monitoring.coreos.com
+    resources:
+      - prometheusrules
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - openslo.com
+    resources:
+      - alertconditions
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - openslo.com
+    resources:
+      - alertconditions/finalizers
+    verbs:
+      - update
+  - apiGroups:
+      - openslo.com
+    resources:
+      - alertconditions/status
+    verbs:
+      - get
+      - patch
+      - update
+  - apiGroups:
+      - openslo.com
+    resources:
+      - alertnotificationtargets
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - openslo.com
+    resources:
+      - alertnotificationtargets/finalizers
+    verbs:
+      - update
+  - apiGroups:
+      - openslo.com
+    resources:
+      - alertnotificationtargets/status
+    verbs:
+      - get
+      - patch
+      - update
+  - apiGroups:
+      - openslo.com
+    resources:
+      - alertpolicies
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - openslo.com
+    resources:
+      - alertpolicies/finalizers
+    verbs:
+      - update
+  - apiGroups:
+      - openslo.com
+    resources:
+      - alertpolicies/status
+    verbs:
+      - get
+      - patch
+      - update
+  - apiGroups:
+      - openslo.com
+    resources:
+      - datasources
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - openslo.com
+    resources:
+      - datasources/finalizers
+    verbs:
+      - update
+  - apiGroups:
+      - openslo.com
+    resources:
+      - datasources/status
+    verbs:
+      - get
+      - patch
+      - update
+  - apiGroups:
+      - openslo.com
+    resources:
+      - slis
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - openslo.com
+    resources:
+      - slis/finalizers
+    verbs:
+      - update
+  - apiGroups:
+      - openslo.com
+    resources:
+      - slis/status
+    verbs:
+      - get
+      - patch
+      - update
+  - apiGroups:
+      - openslo.com
+    resources:
+      - slos
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - openslo.com
+    resources:
+      - slos/finalizers
+    verbs:
+      - update
+  - apiGroups:
+      - openslo.com
+    resources:
+      - slos/status
+    verbs:
+      - get
+      - patch
+      - update

helm/osko/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "osko.fullname" . }}
+  labels:
+    {{- include "osko.labels" . | nindent 4 }}
+spec:
+  {{- if not .Values.autoscaling.enabled }}
+  replicas: {{ .Values.replicaCount }}
+  {{- end }}
+  selector:
+    matchLabels:
+      {{- include "osko.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "osko.selectorLabels" . | nindent 8 }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "osko.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          command:
+            - /manager
+          args:
+            - --leader-elect
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: 8081
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /healthz
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /readyz
+              port: http
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+      terminationGracePeriodSeconds: 10
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}