Add initial version with help and admission controller (#1)

- It adds a helm chart that will be hosted in the Github pages URL of this repository
- an admission controller operator 
- Basic documentation for installing the operator, configuring CRDs and example pod configuration

helm/netbird-operator/templates/_helpers.tpl

@@ -0,0 +1,102 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "netbird-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 "netbird-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 "netbird-operator.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "netbird-operator.labels" -}}
+helm.sh/chart: {{ include "netbird-operator.chart" . }}
+{{ include "netbird-operator.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "netbird-operator.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "netbird-operator.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "netbird-operator.serviceAccountName" -}}
+{{- if .Values.operator.serviceAccount.create }}
+{{- default (include "netbird-operator.fullname" .) .Values.operator.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.operator.serviceAccount.name }}
+{{- end }}
+{{- end }}
+
+
+{{/*
+Create the name of the webhook service
+*/}}
+{{- define "netbird-operator.webhookService" -}}
+{{- printf "%s-webhook-service" (include "netbird-operator.fullname" .) -}}
+{{- end -}}
+
+{{/*
+Create the name of the webhook cert secret
+*/}}
+{{- define "netbird-operator.webhookCertSecret" -}}
+{{- printf "%s-tls" (include "netbird-operator.fullname" .) -}}
+{{- end -}}
+
+{{/*
+Generate certificates for webhook
+*/}}
+{{- define "netbird-operator.webhookCerts" -}}
+{{- $serviceName := (include "netbird-operator.webhookService" .) -}}
+{{- $secretName := (include "netbird-operator.webhookCertSecret" .) -}}
+{{- $secret := lookup "v1" "Secret" .Release.Namespace $secretName -}}
+{{- if (and .Values.webhook.tls.caCert .Values.webhook.tls.cert .Values.webhook.tls.key) -}}
+caCert: {{ .Values.webhook.tls.caCert | b64enc }}
+clientCert: {{ .Values.webhook.tls.cert | b64enc }}
+clientKey: {{ .Values.webhook.tls.key | b64enc }}
+{{- else if and .Values.keepTLSSecret $secret -}}
+caCert: {{ index $secret.data "ca.crt" }}
+clientCert: {{ index $secret.data "tls.crt" }}
+clientKey: {{ index $secret.data "tls.key" }}
+{{- else -}}
+{{- $altNames := list (printf "%s.%s" $serviceName .Release.Namespace) (printf "%s.%s.svc" $serviceName .Release.Namespace) (printf "%s.%s.svc.%s" $serviceName .Release.Namespace .Values.webhook.cluster.dnsDomain) -}}
+{{- $ca := genCA "netbird-operator-ca" 3650 -}}
+{{- $cert := genSignedCert (include "netbird-operator.fullname" .) nil $altNames 3650 $ca -}}
+caCert: {{ $ca.Cert | b64enc }}
+clientCert: {{ $cert.Cert | b64enc }}
+clientKey: {{ $cert.Key | b64enc }}
+{{- end -}}
+{{- end -}}