[proto](https://github.com/istio/api/blob/master/operator/v1alpha1/operator.proto) and
compiled to [Go
structs](https://github.com/istio/api/blob/master/operator/v1alpha1/operator.pb.go).
`IstioOperatorSpec` has pass-through fields to the Helm values.yaml API, but these are additionally validated through
a [schema](../operator/pkg/apis/istio/v1alpha1/values_types.proto).

	"istio.io/istio/istioctl/pkg/cli"
	"istio.io/istio/operator/pkg/apis/istio/v1alpha1"
	"istio.io/istio/operator/pkg/cache"
	"istio.io/istio/operator/pkg/helmreconciler"
	"istio.io/istio/operator/pkg/manifest"
	"istio.io/istio/operator/pkg/name"
	"istio.io/istio/operator/pkg/object"
	"istio.io/istio/operator/pkg/util/clog"
	"istio.io/istio/pkg/config/constants"
	"istio.io/istio/pkg/kube"

meeting to share your ideas.

This document is an overview of how the operator works from a user perspective. For more details about the design and
architecture and a code overview, see [ARCHITECTURE.md](../architecture/environments/operator.md).

## Introduction

The operator uses the [IstioOperator API](https://github.com/istio/api/blob/master/operator/v1alpha1/operator.proto), which has
three main components:

  labels:
{{ $gateway.labels | toYaml | indent 4 }}
    release: {{ .Release.Name }}
    istio.io/rev: {{ .Values.revision | default "default" | quote }}
    install.operator.istio.io/owning-resource: {{ .Values.ownerName | default "unknown" }}
    operator.istio.io/component: "EgressGateways"
spec:
{{- if not $gateway.autoscaleEnabled }}
{{- if $gateway.replicaCount }}
  replicas: {{ $gateway.replicaCount }}
{{- end }}
{{- end }}

	klabels "k8s.io/apimachinery/pkg/labels"

	"istio.io/istio/operator/pkg/compare"
	"istio.io/istio/operator/pkg/helmreconciler"
	"istio.io/istio/operator/pkg/manifest"
	"istio.io/istio/operator/pkg/name"
	"istio.io/istio/operator/pkg/object"
	"istio.io/istio/operator/pkg/util"
	"istio.io/istio/operator/pkg/util/clog"
	tutil "istio.io/istio/pilot/test/util"
	"istio.io/istio/pkg/file"

	"istio.io/istio/operator/pkg/util/clog"
	"istio.io/istio/operator/pkg/util/progress"
	"istio.io/istio/operator/pkg/verifier"
	pkgversion "istio.io/istio/operator/pkg/version"
	operatorVer "istio.io/istio/operator/version"
	"istio.io/istio/pkg/config/constants"
	"istio.io/istio/pkg/config/labels"
	"istio.io/istio/pkg/kube"
)

type InstallArgs struct {

        files:
          # Tests can do anything
          - "!$test"
          # Main code should only be used by appropriate binaries
          - "!**/operator/**"
          - "!**/istioctl/**"
          - "!**/tools/bug-report/**"
          # This should only really import operator API, but that is hard to express without a larger refactoring
          - "!**/pkg/kube/**"
          - "!**/pkg/url/**"
          - "!**/pkg/test/framework/**"

  labels:
{{ $gateway.labels | toYaml | indent 4 }}
    release: {{ .Release.Name }}
    istio.io/rev: {{ .Values.revision | default "default" | quote }}
    install.operator.istio.io/owning-resource: {{ .Values.ownerName | default "unknown" }}
    operator.istio.io/component: "IngressGateways"
spec:
{{- if not $gateway.autoscaleEnabled }}
{{- if $gateway.replicaCount }}
  replicas: {{ $gateway.replicaCount }}
{{- end }}
{{- end }}

	"regexp"
	"strings"

	. "github.com/onsi/gomega"
	"github.com/onsi/gomega/types"
	labels2 "k8s.io/apimachinery/pkg/labels"

	name2 "istio.io/istio/operator/pkg/name"
	"istio.io/istio/operator/pkg/object"
	"istio.io/istio/operator/pkg/tpath"
	"istio.io/istio/operator/pkg/util"
	"istio.io/istio/pkg/log"
	"istio.io/istio/pkg/test"
)

// PathValue is a path/value type.
type PathValue struct {
	path  string
	value any

	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/runtime/serializer"
	"k8s.io/apimachinery/pkg/runtime/serializer/json"

	"istio.io/istio/operator/pkg/helm"
	"istio.io/istio/pkg/kube"
	"istio.io/istio/pkg/maps"
)

const (
	IstioTagLabel       = "istio.io/tag"
	DefaultRevisionName = "default"

	defaultChart            = "default"