digraph {
    grpc -> ca [label="Send CSR gRPC Request"]
    subgraph cluster_istioagent {
        label = "Istio Agent"
        color="orange"
        sds
        SecretManager -> caClient [label="Sign CSR"]
        caClient -> grpc
        grpc -> TokenProvider [dir=none,label="Fetch JWT",color=purple]
        grpc -> cfiles [dir=none,label="Fetch Cert",color=purple]

        sds -> SecretManager [label="Generate certificate"]

10.244.0.156:9402                                HEALTHY                  outbound|9402||cert-manager-istio-csr-metrics.cert-manager.svc.cluster.local
10.244.0.156:6443                                HEALTHY                  outbound|443||cert-manager-istio-csr.cert-manager.svc.cluster.local

                    "endpoint_config": {
                        "@type": "type.googleapis.com/envoy.config.endpoint.v3.ClusterLoadAssignment",
                        "cluster_name": "outbound|443||cert-manager-istio-csr.cert-manager.svc.cluster.local",
                        "endpoints": [
                            {
                                "locality": {},
                                "lb_endpoints": [

                    }
                ]
            }
        ],
        "policy": {
            "overprovisioningFactor": 140
        }
    },
    {
        "clusterName": "outbound|9402||cert-manager-istio-csr-metrics.cert-manager.svc.cluster.local",
        "endpoints": [
            {
                "locality": {},
                "lbEndpoints": [
                    {
                        "endpoint": {

      loadBalancingWeight: 1
      metadata:
        filterMetadata:
          istio:
            workload: cert-manager-istio-csr;cert-manager;;;Kubernetes
    loadBalancingWeight: 1
    locality: {}
  policy:
    overprovisioningFactor: 140
- clusterName: outbound|443||cert-manager-istio-csr.cert-manager.svc.cluster.local
  endpoints:
  - lbEndpoints:
    - endpoint:
        address:
          socketAddress:

digraph {
    envoy -> sds [dir=both, label="SDS"]
    envoy -> xdsproxy  [dir=both, label="ADS"]

    sds -> ca [label="CSR"]

    xdsproxy -> discovery [dir=both,label="ADS"]

    envoy [shape=hexagon, color=purple]

    subgraph cluster_istioagent {
        label = "Istio Agent"
        color="orange"
        sds
        xdsproxy
    }

    subgraph cluster_istiod {
        label = "Istiod"
        color="lightblue"

at two levels. For distributing workload certificates, Envoy will send [SDS](https://www.envoyproxy.io/docs/envoy/latest/configuration/security/secret)
requests to the agent, causing the agent to submit a CSR to the configured CA (generally Istiod). For other configuration,
Envoy will send [ADS](https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/operations/dynamic_configuration#aggregated-xds-ads)

  repeated CertificateSigningRequest items = 2;
}

// CertificateSigningRequestSpec contains the certificate request.
message CertificateSigningRequestSpec {
  // Base64-encoded PKCS#10 CSR data
  // +listType=atomic
  optional bytes request = 1;

  // Requested signer for the request. It is a qualified name in the form:
  // `scope-hostname.io/name`.
  // If empty, it will be defaulted:

        * requests for a TLS client certificate for any node are approved if the CSR creator has `create` permission on the `certificatesigningrequests` resource and `nodeclient` subresource in the `certificates.k8s.io` API group

- Remove the deprecated flags `--csr-only` and `--csr-dir` from `kubeadm certs renew`. Please use `kubeadm certs generate-csr` instead. ([#104796](https://github.com/kubernetes/kubernetes/pull/104796), [@RA489](https://github.com/RA489))