### Overview

- [istio-cni Helm chart](../manifests/charts/istio-cni/templates)
    - `install-cni` daemonset - main function is to install and help the node CNI, but it is also a proper server and interacts with K8S, watching Pods for recovery.
    - `istio-cni-config` configmap with CNI plugin config to add to CNI plugin chained config

            },
            "last_updated": "2024-03-04T08:37:44.851Z"
          }
        },
        {
          "name": "main_internal",
          "active_state": {
            "listener": {
              "@type": "type.googleapis.com/envoy.config.listener.v3.Listener",
              "name": "main_internal",
              "filter_chains": [
                {
                  "filters": [
                    {

        }
      ],
      "dynamic_listeners": [
        {
          "name": "main_internal",
          "active_state": {
            "listener": {
              "@type": "type.googleapis.com/envoy.config.listener.v3.Listener",
              "name": "main_internal",
              "filter_chains": [
                {
                  "filters": [
                    {

// See the License for the specific language governing permissions and
// limitations under the License.

package main

import (
	"context"
	"os"
	"os/signal"
	"syscall"

	"istio.io/istio/cni/pkg/cmd"
	"istio.io/istio/pkg/log"
)

func main() {
	// Create context that cancels on termination signal
	ctx, cancel := context.WithCancel(context.Background())
	sigChan := make(chan os.Signal, 1)

	// Insert jumps to our custom chains
	// This is mostly just for visual tidiness and cleanup, as we can delete the secondary chains and jumps
	// without polluting the main table too much.

	// -t mangle -A PREROUTING -j ISTIO_PRERT
	iptablesBuilder.AppendRule(
		iptableslog.UndefinedCommand, iptablesconstants.PREROUTING, iptablesconstants.MANGLE,
		"-j", ChainInpodPrerouting,
	)

// parses prevResult according to the cniVersion
package main

import (
	"fmt"
	"os"

	"github.com/containernetworking/cni/pkg/skel"
	"github.com/containernetworking/cni/pkg/version"

	"istio.io/istio/cni/pkg/plugin"
	"istio.io/istio/pkg/log"
	istioversion "istio.io/istio/pkg/version"
)

func main() {
	if err := runPlugin(); err != nil {
		os.Exit(1)
	}
}

		}
		cniConfigFilepath += "list"
	}

	installLog.Infof("Created CNI config %s", cniConfigFilepath)
	return cniConfigFilepath, nil
}

// If configured as chained CNI plugin, waits indefinitely for a main CNI config file to exist before returning
// Or until cancelled by parent context
func getCNIConfigFilepath(ctx context.Context, cfg pluginConfig) (string, error) {
	filename := cfg.cniConfName

  // Default is false.
  // Note that this field cannot be set when spec.os.name is windows.
  // +optional
  optional bool readOnlyRootFilesystem = 6;

  // AllowPrivilegeEscalation controls whether a process can gain more
  // privileges than its parent process. This bool directly controls if
  // the no_new_privs flag will be set on the container process.
  // AllowPrivilegeEscalation is true always when the container is:

NAME                   ADDRESSES PORT  MATCH DESTINATION
listener/main_internal           0     ALL   Cluster: inbound-vip|8100|http|httpbin.default.svc.cluster.local
listener/main_internal           0     ALL   Cluster: inbound-vip|8000|http|httpbin.default.svc.cluster.local
listener/main_internal           0     ALL   Cluster: encap
listener/main_internal           0     ALL   Cluster: encap

            },
            "last_updated": "2024-03-04T08:37:44.851Z"
          }
        },
        {
          "name": "main_internal",
          "active_state": {
            "listener": {
              "@type": "type.googleapis.com/envoy.config.listener.v3.Listener",
              "name": "main_internal",
              "filter_chains": [
                {
                  "filters": [
                    {