// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// An example implementation of a client.

package main

import (
	"context"
	"fmt"
	"net/url"
	"os"
	"strings"
	"time"

	"github.com/spf13/cobra"
	// To install the xds resolvers and balancers.

Each component in the new installer is 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.

}

// HasSynced asserts we have "synced", meaning we have processed the initial state.
func (c *Controller) HasSynced() bool {
	// We could check `c.pods` as well, but it is redundant due to the Run() implementation.
	// Instead, just check `c.queue`.
	return c.queue.HasSynced()
}

// nolint: gocritic
func Example() {
	// Setup our fake client. This can be pre-populated with items.

type Rule struct {
	chain  string
	table  string
	params []string
}

// Rules represents iptables for V4 and V6
type Rules struct {
	rulesv4 []*Rule
	rulesv6 []*Rule
}

// IptablesRuleBuilder is an implementation for IptablesRuleBuilder interface
type IptablesRuleBuilder struct {
	rules Rules
	cfg   *config.Config
}

// NewIptablesBuilders creates a new IptablesRuleBuilder

// CertificateAuthority. It may default or otherwise mutate a certificate
// template.
type SigningPolicy interface {
	// not-exporting apply forces signing policy implementations to be internal
	// to this package.
	apply(template *x509.Certificate) error
}

// PermissiveSigningPolicy is the signing policy historically used by the local
// signer.
//

// The default event reporter in "k8s.io/client-go/tools/events/event_broadcaster.go" shows
// how this struct is updated on heartbeats and can guide customized reporter implementations.
message EventSeries {
  // count is the number of occurrences in this series up to the last heartbeat time.
  optional int32 count = 1;

package cluster

import (
	"bytes"
	"fmt"

	"istio.io/istio/pkg/kube"
	"istio.io/istio/pkg/test/framework/config"
)

// Map can be given as a shared reference to multiple Topology/Cluster implementations.
// allowing clusters to find each other for lookups of Primary, ConfigCluster, etc.
type Map = map[string]Cluster

func NewTopology(config Config, allClusters Map) Topology {
	return Topology{

	EventRecorder EventRecorder
}

// Interface offers a common interface for locking on arbitrary
// resources used in leader election.  The Interface is used
// to hide the details on specific implementations in order to allow
// them to change over time.  This interface is strictly for use
// by the leaderelection code.
type Interface interface {
	// Get returns the LeaderElectionRecord

At a high level, the protocol consists of tunneling TCP connections over HTTP/2 CONNECT, over mTLS.

## Specification

TODO

## Implementations

### Clients

#### CLI

A CLI client is available using the `client` binary.

Usage examples:

```shell
go install ./pkg/test/echo/cmd/client

  // validity duration so a client must check the delta between the notBefore and
  // and notAfter fields in the issued certificate to determine the actual duration.
  //
  // The v1.22+ in-tree implementations of the well-known Kubernetes signers will
  // honor this field as long as the requested duration is not greater than the
  // maximum duration they will honor per the --cluster-signing-duration CLI