// it might be.
//
// Instead, we rely directly on the procfs.
// This rules out two possible methods:
// * use crictl to inspect the pod; this returns the bind-mounted network namespace file.
// * /var/lib/cni/results shows the outputs of CNI plugins; this containers the bind-mounted network namespace file.
//
// Instead, we traverse the procfs. Comments on this method are inline.
func getPodNetNs(pod *corev1.Pod) (string, error) {

	"fmt"
	"net/netip"
	"strconv"

	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/types"

	"istio.io/api/annotation"
	"istio.io/istio/cni/pkg/iptables"
	"istio.io/istio/pkg/slices"
	dep "istio.io/istio/tools/istio-iptables/pkg/dependencies"
)

// Adapts CNI to ztunnel server. decoupled from k8s for easier integration testing.
type NetServer struct {
	ztunnelServer      ZtunnelServer
	currentPodSnapshot *podNetnsCache

      "plugin_log_level": "info",
      "mtu": 1500,
      "ipam": {
        "type": "calico-ipam"
      },
      "policy": {
        "type": "k8s"
      },
      "kubernetes": {
        "kubeconfig": "/etc/cni/net.d/calico-kubeconfig"
      }
    },
    {
      "type": "portmap",
      "snat": true,
      "capabilities": {
        "portMappings": true
      }
    }
  ]

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

// This is a sample chained plugin that supports multiple CNI versions. It
// parses prevResult according to the cniVersion
package plugin

import "errors"

// ErrNotImplemented is returned when a requested feature is not implemented.

      "plugin_log_level": "info",
      "mtu": 1500,
      "ipam": {
        "type": "calico-ipam"
      },
      "policy": {
        "type": "k8s"
      },
      "kubernetes": {
        "kubeconfig": "/etc/cni/net.d/calico-kubeconfig"
      }
    },
    {
      "type": "portmap",
      "snat": true,
      "capabilities": {
        "portMappings": true
      }
    }
  ]

      "plugin_log_level": "info",
      "mtu": 1500,
      "ipam": {
        "type": "calico-ipam"
      },
      "policy": {
        "type": "k8s"
      },
      "kubernetes": {
        "kubeconfig": "/etc/cni/net.d/calico-kubeconfig"
      }
    },
    {
      "type": "portmap",
      "snat": true,
      "capabilities": {
        "portMappings": true
      }
    }
  ]

package plugin

import (
	"context"
	"fmt"
	"path/filepath"
	"strings"

	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/kubernetes"

	"istio.io/istio/cni/pkg/constants"
	"istio.io/istio/pkg/kube"
	"istio.io/istio/pkg/log"
	"istio.io/istio/pkg/util/sets"
)

type PodInfo struct {
	Containers        sets.String
	Labels            map[string]string

  # Determine what CNI to install
  case "${KUBERNETES_CNI:-}" in 

    "calico")
      echo "Installing Calico CNI"
      install_calico "" "$(dirname "$CONFIG")"
      ;;

    "")
      # perfectly fine, we accepted the default KinD CNI
      ;;

    *)
      # we don't know what to do but we've got no CNI, return non-zero

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

// This is a sample chained plugin that supports multiple CNI versions. It
// parses prevResult according to the cniVersion
package plugin

type iptables struct{}

func newIPTables() InterceptRuleMgr {
	return &iptables{}

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

package nodeagent

import (
	"net/http"
	"sync/atomic"

	"istio.io/istio/cni/pkg/constants"
)

// StartHealthServer initializes and starts a web server that exposes liveness and readiness endpoints at port 8000.
func StartHealthServer() (installReady *atomic.Value, watchReady *atomic.Value) {