proxyMetadata:
          # this should override the value from the global meshconfig
          PROXY_CONFIG_ANNOT_VALUE: bar
    labels: {}
  template:
    ports: {}
    serviceAccount: vm-serviceaccount
  probe:
    httpGet:

kind: WorkloadGroup
metadata:
  name: foo
  namespace: bar
spec:
  metadata:
    annotations: {}
    labels: {}
  template:
    ports: {}
    serviceAccount: vm-serviceaccount
  probe:
    httpGet:

        proxyMetadata:
          # this should override the value from the global meshconfig
          PROXY_CONFIG_ANNOT_VALUE: bar
    labels: {}
  template:
    ports: {}
    serviceAccount: vm-serviceaccount
  probe:
    httpGet:

		EnableIPv6:    args.EnableIPv6,
	}

	log.Debug("creating ipsets in the node netns")
	set, err := createHostsideProbeIpset(cfg.EnableIPv6)
	if err != nil {
		return nil, fmt.Errorf("error initializing hostside probe ipset: %w", err)
	}

	podNsMap := newPodNetnsCache(openNetnsInRoot(pconstants.HostMountsPath))
	ztunnelServer, err := newZtunnelServer(args.ServerSocket, podNsMap)
	if err != nil {

	HostProbeSNATIPV6 = netip.MustParseAddr(env.RegisterStringVar("HOST_PROBE_SNAT_IPV6", DefaultHostProbeSNATIPV6, "").Get())
)

const (
	// to reliably identify kubelet healthprobes from inside the pod (versus standard kube-proxy traffic,
	// since the IP is normally the same), we SNAT identified host probes in the host netns to a fixed

iptables -t nat -N ISTIO_POSTRT
iptables -t nat -A POSTROUTING -j ISTIO_POSTRT

	DNSCapturePort              = 15053
	ZtunnelInboundPort          = 15008
	ZtunnelOutboundPort         = 15001
	ZtunnelInboundPlaintextPort = 15006
	ProbeIPSet                  = "istio-inpod-probes"

iptables -t nat -A ISTIO_POSTRT -m owner --socket-exists -p tcp -m set --match-set istio-inpod-probes-v4 dst -j SNAT --to-source 169.254.7.127
ip6tables -t nat -N ISTIO_POSTRT
ip6tables -t nat -A POSTROUTING -j ISTIO_POSTRT

  // Status is the status of the condition.
  // Can be True, False, Unknown.
  // More info: http://kubernetes.io/docs/user-guide/carp-states#carp-conditions
  optional string status = 2;

  // Last time we probed the condition.
  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.Time lastProbeTime = 3;

  // Last time the condition transitioned from one status to another.
  // +optional

This can be reading from Kubernetes and writing other objects back, writing to proxies over XDS, etc.

Unfortunately, writing controllers is very error prone, even for seemingly simple cases.
To work around this, Istio has a variety of abstractions meant to make writing controllers easier.

## Clients