optional. Users can install the component defined in the new installer, use the equivalent component in `istio-system`, configured with the official installer, or use a different version or implementation. For example you may use your own Prometheus and Grafana installs, or you may use a specialized/custom certificate provisioning tool, or use components that are centrally managed and running in a different cluster. This is a work in progress - building on top of the multi-cluster installer. As an...

Complex logic ahead...
We have three sets of values, in order of precedence (last wins):
1. The builtin values.yaml defaults
2. The profile the user selects
3. Users input (-f or --set)

Unfortunately, Helm provides us (1) and (3) together (as .Values), making it hard to insert (2).

However, we can workaround this by placing all of (1) under a specific key (.Values.defaults).

{{ $mcsAPIGroup := or .Values.pilot.env.MCS_API_GROUP "multicluster.x-k8s.io" }}
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: istio-reader-clusterrole{{- if not (eq .Values.revision "")}}-{{ .Values.revision }}{{- end }}-{{ .Release.Namespace }}
  labels:
    app: istio-reader
    release: {{ .Release.Name }}
rules:
  - apiGroups:
      - "config.istio.io"
      - "security.istio.io"
      - "networking.istio.io"

{{- define "resources"  }}
  {{- if or (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyCPU`) (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyMemory`) (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyCPULimit`) (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyMemoryLimit`) }}
    {{- if or (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyCPU`) (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyMemory`) }}
      requests:

{{- define "resources"  }}
  {{- if or (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyCPU`) (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyMemory`) (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyCPULimit`) (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyMemoryLimit`) }}
    {{- if or (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyCPU`) (isset .ObjectMeta.Annotations `sidecar.istio.io/proxyMemory`) }}
      requests:

                          values:
                            description: values is an array of string values. If the
                              operator is In or NotIn, the values array must be non-empty.
                              If the operator is Exists or DoesNotExist, the values
                              array must be empty. This array is replaced during a
                              strategic merge patch.

  {{ $prom := include "default-prometheus" . | eq "true" }}
  {{ $sdMetrics := include "default-sd-metrics" . | eq "true" }}
  {{ $sdLogs := include "default-sd-logs" . | eq "true" }}
  {{- if or $prom $sdMetrics $sdLogs }}
    defaultProviders:
    {{- if or $prom $sdMetrics }}
      metrics:
      {{ if $prom }}- prometheus{{ end }}
      {{ if and $sdMetrics $sdLogs }}- stackdriver{{ end }}
    {{- end }}
    {{- if and $sdMetrics $sdLogs }}

{{- if .Values.global.configCluster }}
{{ $mcsAPIGroup := or .Values.pilot.env.MCS_API_GROUP "multicluster.x-k8s.io" }}
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: istiod-clusterrole{{- if not (eq .Values.revision "")}}-{{ .Values.revision }}{{- end }}-{{ .Release.Namespace }}
  labels:
    app: istiod
    release: {{ .Release.Name }}
rules:
  # sidecar injection controller
  - apiGroups: ["admissionregistration.k8s.io"]

      name: Hosts
      type: string
    - description: Whether the service is external to the mesh or part of the mesh
        (MESH_EXTERNAL or MESH_INTERNAL)
      jsonPath: .spec.location
      name: Location
      type: string
    - description: Service resolution mode for the hosts (NONE, STATIC, or DNS)
      jsonPath: .spec.resolution
      name: Resolution
      type: string

.Release.Service }} app.kubernetes.io/name: {{ include "gateway.name" . }} {{- range $key, $val := .Values.labels }} {{- if not (or (eq $key "app") (eq $key "istio")) }} {{ $key | quote }}: {{ $val | quote }} {{- end }} {{- end }} {{- end }} {{- define "gateway.podLabels" -}} {{ include "gateway.selectorLabels" . }} {{- range $key, $val := .Values.labels }} {{- if not (or (eq $key "app") (eq $key "istio")) }} {{ $key | quote }}: {{ $val | quote }} {{- end }} {{- end }} {{- end }} {{- define "gateway.selectorLabels"...