this.mem.setFloat64(addr, 0, true);
					return;
				}

				let id = this._ids.get(v);
				if (id === undefined) {
					id = this._idPool.pop();
					if (id === undefined) {
						id = this._values.length;
					}
					this._values[id] = v;
					this._goRefCounts[id] = 0;
					this._ids.set(v, id);
				}
				this._goRefCounts[id]++;
				let typeFlag = 0;
				switch (typeof v) {

# Istio base Helm Chart

This chart installs resources shared by all Istio revisions. This includes Istio CRDs.

## Setup Repo Info

```console
helm repo add istio https://istio-release.storage.googleapis.com/charts
helm repo update
```

_See [helm repo](https://helm.sh/docs/helm/helm_repo/) for command documentation._

## Installing the Chart

To install the chart with the release name `istio-base`:

```console

helm repo update
```

_See [helm repo](https://helm.sh/docs/helm/helm_repo/) for command documentation._

## Installing the Chart

Before installing, ensure CRDs are installed in the cluster (from the `istio/base` chart).

To install the chart with the release name `istiod`:

```console
kubectl create namespace istio-system
helm install istiod istio/istiod --namespace istio-system

	mcs "sigs.k8s.io/mcs-api/pkg/apis/v1alpha1"

	"istio.io/istio/pilot/pkg/features"
)

var (
	schemeBuilder = &runtime.SchemeBuilder{}

	// AddToScheme is used to register MCS CRDs to a runtime.Scheme
	AddToScheme = schemeBuilder.AddToScheme

	// MCSSchemeGroupVersion is group version used to register Kubernetes Multi-Cluster Services (MCS) objects

			context.Background(), metav1.DeleteOptions{}, metav1.ListOptions{}); e != nil {
			err = multierror.Append(err, e)
		}
		return
	})
}

// When we cleanup, we should not delete CRDs. This will filter out all the crds
func removeCRDs(istioYaml string) string {
	allParts := yml.SplitString(istioYaml)
	nonCrds := make([]string, 0, len(allParts))

	"apps/v1/Deployment",
	"extensions/v1beta1/Ingress",
}

func TestEnsureNoMissingCRDs(t *testing.T) {
	// This test ensures that we have necessary tests for all known CRDs. If you're breaking this test, it is likely
	// that you need to update validation tests by either adding new/missing test cases, or removing test cases for
	// types that are no longer supported.
	framework.NewTest(t).

                  "stat_prefix": "http_proxy",
                  "http_filters": [
                    {"name": "envoy.filters.http.router"
                    }
                  ],
                  "rds": {
                      "route_config_name": "80",
                       "config_source": {"resource_api_version": "V3","ads": {}}
                  },
                  "http_protocol_options": {

	)
	xdsClientTrackerMutex = &sync.Mutex{}
	xdsClientTracker      = make(map[string]float64)

	// Covers xds_builderr and xds_senderr for xds in {lds, rds, cds, eds}.
	pushes = monitoring.NewSum(
		"pilot_xds_pushes",
		"Pilot build and send errors for lds, rds, cds and eds.",
	)

	cdsSendErrPushes = pushes.With(typeTag.Value("cds_senderr"))
	edsSendErrPushes = pushes.With(typeTag.Value("eds_senderr"))

```

Istio's helm charts come with a common `openshift` profile that can be used during installation.

The installation process using the Helm charts is as follows:

1) `base` chart creates cluster-wide CRDs, cluster bindings and cluster resources. It is possible to change the namespace from `istio-system` but it is not recommended.

```console
helm install istio-base -n istio-system manifests/charts/base --set profile=openshift
```

Functionality offered by `kclient` includes:
* Typed clients (via generics) and more ergonomic APIs
* Ability to make a _delayed_ client. This is used when making clients based on CRDs that may not exist.
  In general, Istio does not fail on missing CRDs and prefers to treat these as if there were just zero resources for that client.
  The `NewDelayedInformer` abstracts that entirely, offering the same API as normal `kclient.Client`.