//
  // Required.
  optional string name = 1;

  // Expression represents the expression which will be evaluated by CEL. Must evaluate to bool.
  // CEL expressions have access to the contents of the AdmissionRequest and Authorizer, organized into CEL variables:
  //
  // 'object' - The object from the incoming request. The value is null for DELETE requests.

iptables -t mangle -A ISTIO_PRERT -m mark --mark 0x539/0xfff -j CONNMARK --set-xmark 0x111/0xfff
iptables -t mangle -A ISTIO_PRERT -s 169.254.7.127 -p tcp -m tcp -j ACCEPT
iptables -t nat -A ISTIO_OUTPUT -d 169.254.7.127 -p tcp -m tcp -j ACCEPT
iptables -t mangle -A ISTIO_PRERT ! -d 127.0.0.1/32 -p tcp -i lo -j ACCEPT
iptables -t mangle -A ISTIO_PRERT -p tcp -m tcp --dport 15008 -m mark ! --mark 0x539/0xfff -j TPROXY --on-port 15008 --tproxy-mark 0x111/0xfff

* mangle
-N ISTIO_DIVERT
-N ISTIO_TPROXY
-N ISTIO_INBOUND
-A ISTIO_DIVERT -j MARK --set-mark 1337
-A ISTIO_DIVERT -j ACCEPT
-A ISTIO_TPROXY ! -d 127.0.0.1/32 -p tcp -j TPROXY --tproxy-mark 1337/0xffffffff --on-port 15006
-A PREROUTING -p tcp -j ISTIO_INBOUND
-A ISTIO_INBOUND -p tcp --dport 15020 -j RETURN
-A ISTIO_INBOUND -p tcp --dport 15021 -j RETURN
-A ISTIO_INBOUND -p tcp --dport 15090 -j RETURN

  //   Requests for this signer are never auto-approved by kube-controller-manager, and can be issued by the "csrsigning" controller in kube-controller-manager.
  //
  // More details are available at https://k8s.io/docs/reference/access-authn-authz/certificate-signing-requests/#kubernetes-signers
  //
  // Custom signerNames can also be specified. The signer defines:
  //  1. Trust distribution: how trust (CA bundles) are distributed.

For example, the `demo` profile offers a preset configuration to try out Istio in a test environment, with additional features enabled and lowered resource requirements.

For consistency, the same profiles are used across each chart, even if they do not impact a given chart.

Explicitly set values have highest priority, then profile settings, then chart defaults.

| `Traceparent` | (Experimental) This maintains tracing information. Note this is tracing of *connections*, and is not correlated to tracing of user's own HTTP requests. However, this is useful to follow a connection across ztunnels.                                 |

## Traffic routing

Based on the three [redirection](#redirection) paths, the ztunnel has three primary types of traffic it handles.

### Outbound

controller as the CLI command `istioctl install` running in a loop in a pod in the cluster and using the config
from the in-cluster IstioOperator custom resource (CR).
There are two major differences:

1. The controller does not accept any dynamic user config through flags. All user interaction is through the
IstioOperator CR.
1. The controller has additional logic that mirrors istioctl commands like upgrade, but is driven from the declarative

  // job should be run with.  Setting to null means that the success of any
  // pod signals the success of all pods, and allows parallelism to have any positive
  // value.  Setting to 1 means that parallelism is limited to 1 and the success of that
  // pod signals the success of the job.
  // More info: https://kubernetes.io/docs/concepts/workloads/controllers/jobs-run-to-completion/

iptables -t mangle -A ISTIO_PRERT -s e9ac:1e77:90ca:399f:4d6d:ece2:2f9b:3164 -p tcp -m tcp -j ACCEPT
iptables -t nat -A ISTIO_OUTPUT -d e9ac:1e77:90ca:399f:4d6d:ece2:2f9b:3164 -p tcp -m tcp -j ACCEPT
iptables -t mangle -A ISTIO_PRERT ! -d 127.0.0.1/32 -p tcp -i lo -j ACCEPT
iptables -t mangle -A ISTIO_PRERT -p tcp -m tcp --dport 15008 -m mark ! --mark 0x539/0xfff -j TPROXY --on-port 15008 --tproxy-mark 0x111/0xfff

* mangle
-N ISTIO_DIVERT
-N ISTIO_TPROXY
-N ISTIO_INBOUND
-A ISTIO_DIVERT -j MARK --set-mark 1337
-A ISTIO_DIVERT -j ACCEPT
-A ISTIO_TPROXY ! -d 127.0.0.1/32 -p tcp -j TPROXY --tproxy-mark 1337/0xffffffff --on-port 15006
-A PREROUTING -p tcp -j ISTIO_INBOUND
-A ISTIO_INBOUND -p tcp --dport 15020 -j RETURN
-A ISTIO_INBOUND -p tcp --dport 15021 -j RETURN
-A ISTIO_INBOUND -p tcp --dport 15090 -j RETURN