description: Originating region.
                                        type: string
                                      to:
                                        description: Destination region the traffic
                                          will fail over to when endpoints in the
                                          'from' region becomes unhealthy.

# help works by looking over all Makefile includes matching `target: ## comment` regex and outputting them
help: ## Show this help
	@egrep -h '^[a-zA-Z_\.-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort  | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'

                                        description: Originating region.
                                        type: string
                                      to:
                                        description: Destination region the traffic
                                          will fail over to when endpoints in the
                                          'from' region becomes unhealthy.

message HTTPIngressPath {
  // path is matched against the path of an incoming request. Currently it can
  // contain characters disallowed from the conventional "path" part of a URL
  // as defined by RFC 3986. Paths must begin with a '/' and must be present
  // when using PathType with value "Exact" or "Prefix".
  // +optional
  optional string path = 1;

  // pathType determines the interpretation of the path matching. PathType can

  // which run an apiserver which might need to make calls to this
  // webhook. Such installs are likely to be non-portable, i.e., not easy
  // to turn up in a new cluster.
  //
  // The scheme must be "https"; the URL must begin with "https://".
  //
  // A path is optional, and if present may be any string permissible in
  // a URL. You may use the path to pass an arbitrary string to the
  // webhook, for example, a cluster identifier.
  //

  //   node label.
  // * topology.kubernetes.io/zone: the value indicates the zone where the
  //   endpoint is located. This should match the corresponding node label.
  // * topology.kubernetes.io/region: the value indicates the region where the
  //   endpoint is located. This should match the corresponding node label.
  // This field is deprecated and will be removed in future api versions.
  // +optional
  map<string, string> topology = 5;

### Install Control plane

This can run in any cluster. A mesh should have at least one cluster should run Pilot or equivalent XDS server,
and it is recommended to have Pilot running in each region and in multiple availability zones for multi cluster.

```bash
iop istio-control istio-discovery $IBASE/istio-control/istio-discovery \
            --set global.istioNamespace=istio-system

entirety. nullable: true type: boolean failover: description: 'Optional: only one of distribute, failover or failoverPriority can be set.' items: properties: from: description: Originating region. type: string to: description: Destination region the traffic will fail over to when endpoints in the 'from' region becomes unhealthy. type: string type: object type: array failoverPriority: description: failoverPriority is an ordered list of labels used to sort endpoints to do priority based load balancing....

message HTTPIngressPath {
  // path is matched against the path of an incoming request. Currently it can
  // contain characters disallowed from the conventional "path" part of a URL
  // as defined by RFC 3986. Paths must begin with a '/' and must be present
  // when using PathType with value "Exact" or "Prefix".
  // +optional
  optional string path = 1;

  // pathType determines the interpretation of the path matching. PathType can

  // which run an apiserver which might need to make calls to this
  // webhook. Such installs are likely to be non-portable, i.e., not easy
  // to turn up in a new cluster.
  //
  // The scheme must be "https"; the URL must begin with "https://".
  //
  // A path is optional, and if present may be any string permissible in
  // a URL. You may use the path to pass an arbitrary string to the
  // webhook, for example, a cluster identifier.
  //