Node Agent requires privileged node permissions, and will require allow-listing in constrained environments that block privileged workloads by default. If using sidecar repair mode or ambient mode, the node agent additionally needs permissions to enter pod network namespaces and perform networking configuration in them. If either sidecar repair or ambient mode are enabled, on startup the container will drop all Linux capabilities via (`drop:ALL`), and re-add back the ones sidecar repair/ambient explicitly...

    #- global
    #- "{{ valueOrDefault .DeploymentMeta.Namespace \"default\" }}.global"

    # Kubernetes >=v1.11.0 will create two PriorityClass, including system-cluster-critical and
    # system-node-critical, it is better to configure this in order to make sure your Istio pods
    # will not be killed because of low priority class.
    # Refer to https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/#priorityclass

            {{- end }}
            - containerPort: 15090
              protocol: TCP
              name: http-envoy-prom
          args:
          - proxy
          - router
          - --domain
          - $(POD_NAMESPACE).svc.{{ .Values.global.proxy.clusterDomain }}
        {{- if .Values.global.proxy.logLevel }}
          - --proxyLogLevel={{ .Values.global.proxy.logLevel }}

          name: status-port
          protocol: TCP
        - containerPort: 15090
          protocol: TCP
          name: http-envoy-prom
        args:
        - proxy
        - router
        - --domain
        - $(POD_NAMESPACE).svc.{{ .Values.global.proxy.clusterDomain }}
        - --proxyLogLevel
        - {{ annotation .ObjectMeta `sidecar.istio.io/logLevel` .Values.global.proxy.logLevel | quote}}

1. If the destination has a waypoint proxy, we must send to it to the waypoint (using HBONE).
   When we do this, we will want to preserve the original destination Service IP, as the waypoint can do a better job picking a backend pod than we can.

				threshold = 1
			}
			var w *watcher
			ctx, cancel := context.WithTimeout(context.Background(), timeout)
			defer cancel()
			if generation == "" {
				w = getAndWatchResource(ctx, cliCtx) // setup version getter from kubernetes
			} else {
				w = withContext(ctx)
				w.Go(func(result chan string) error {
					result <- generation
					return nil
				})
			}

    #- global
    #- "{{ valueOrDefault .DeploymentMeta.Namespace \"default\" }}.global"

    # Kubernetes >=v1.11.0 will create two PriorityClass, including system-cluster-critical and
    # system-node-critical, it is better to configure this in order to make sure your Istio pods
    # will not be killed because of low priority class.
    # Refer to https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/#priorityclass

[pkg/validate/validate.go](pkg/validate/validate.go). These rules
refer to the Go struct path schema and hence have names with a capitalized first letter.
The Helm values.yaml API is validated in
[validate_values.go](pkg/validate/validate_values.go)
and refer to the values.yaml data paths. Hence, these rules have names with a lower case first letter.
Apart from validating the correctness of individual fields, the operator ensure that relationships between values in

            {{- end }}
            - containerPort: 15090
              protocol: TCP
              name: http-envoy-prom
          args:
          - proxy
          - router
          - --domain
          - $(POD_NAMESPACE).svc.{{ .Values.global.proxy.clusterDomain }}
        {{- if .Values.global.proxy.logLevel }}
          - --proxyLogLevel={{ .Values.global.proxy.logLevel }}

    logging:
      level: "default:info"

    # Kubernetes >=v1.11.0 will create two PriorityClass, including system-cluster-critical and
    # system-node-critical, it is better to configure this in order to make sure your Istio pods
    # will not be killed because of low priority class.
    # Refer to https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/#priorityclass