Replace clusterIP with hostNetwork when using remote-up-karmada.sh

Signed-off-by: lonelyCZ <531187475@qq.com>

docs/installation/fromsource.md

@@ -19,24 +19,21 @@ your clusters based on the codebase.
 
 The `hack/remote-up-karmada.sh` will install `karmada-apiserver` and provide two ways to expose the server:
 
-### 1. expose by service with `LoadBalancer` type
+### 1. expose by `HostNetwork` type
 
-By default, the `hack/remote-up-karmada.sh` will expose `karmada-apiserver` by a service with `LoadBalancer`
+By default, the `hack/remote-up-karmada.sh` will expose `karmada-apiserver` by `HostNetwork`.
-type, and continue the installation progress after the `Load Balancer` allocates an external IP for the
-`karmada-apiserver`.
 
-No extra operations needed with this type, but that *requires your cluster have deployed the `Load Balancer`*.
+No extra operations needed with this type.
 
-### 2. expose by service with `ClusterIP` type
+### 2. expose by service with `LoadBalancer` type
-If you don't want to use the `Load Balancer`, you can ask `hack/remote-up-karmada.sh` to expose `karmada-apiserver`
+
-by a service with `ClusterIP` type. All you need to do is set an environment:
+If you don't want to use the `HostNetwork`, you can ask `hack/remote-up-karmada.sh` to expose `karmada-apiserver`
+by a service with `LoadBalancer` type that *requires your cluster have deployed the `Load Balancer`*.
+All you need to do is set an environment:
 ```bash
-export CLUSTER_IP_ONLY=true
+export LOAD_BALANCER=true
 ```
 
-> Note: You should run `hack/remote-up-karmada.sh` on one of the nodes of the cluster, otherwise the `hack/remote-up-karmada.sh`
-> can't access the `karmada-apiserver` exposed by a `cluster IP`.
-
 ## Install
 From the `root` directory the `karmada` repo, install Karmada by command:
 ```bash

hack/README.md

@@ -14,7 +14,7 @@ ensures development quality.
 
 - [`remote-up-karmada.sh`](remote-up-karmada.sh) This script will install Karmada to a standalone K8s cluster, this cluster
   may be real, remote , and even for production. It is worth noting for the connectivity from your client to Karmada API server,
-  it will create a load balancer service with an external IP by default, else type `export CLUSTER_IP_ONLY=true` with the `ClusterIP` type service before the following script.
+  it will directly use host network by default, else `export LOAD_BALANCER=true` with the `LoadBalancer` type service before the following script.
   If your want to customize a load balancer service, you may add the annotations at the metadata part of service `karmada-apiserver` in
   [`../artifacts/deploy/karmada-apiserver.yaml`](../artifacts/deploy/karmada-apiserver.yaml) before the installing. The
   following is an example.

hack/deploy-karmada.sh

@@ -16,7 +16,7 @@ KARMADA_APISERVER_SECURE_PORT=${KARMADA_APISERVER_SECURE_PORT:-5443}
 HOST_CLUSTER_NAME=${HOST_CLUSTER_NAME:-"karmada-host"}
 ROOT_CA_FILE=${CERT_DIR}/server-ca.crt
 CFSSL_VERSION="v1.5.0"
-CLUSTER_IP_ONLY=${CLUSTER_IP_ONLY:-false} # whether create a 'ClusterIP' type service for karmada apiserver
+LOAD_BALANCER=${LOAD_BALANCER:-false} # whether create a 'LoadBalancer' type service for karmada apiserver
 source "${REPO_ROOT}"/hack/util.sh
 
 function usage() {
@@ -145,15 +145,15 @@ util::wait_pod_ready "${ETCD_POD_LABEL}" "${KARMADA_SYSTEM_NAMESPACE}"
 
 #KARMADA_APISERVER_SERVICE_TYPE is the service type of karmada API Server, For connectivity, it will be different when
 # HOST_CLUSTER_TYPE is different. When HOST_CLUSTER_TYPE=local, we will create a ClusterIP type Service. And when
-# HOST_CLUSTER_TYPE=remote, we need to create a LoadBalancer service to access Karmada API Server outside the
+# HOST_CLUSTER_TYPE=remote, we directly use hostNetwork to access Karmada API Server outside the
-# karmada-host cluster. Of course, you can still use a ClusterIP type Service by setting $CLUSTER_IP_ONLY=true
+# karmada-host cluster. Of course, you can create a LoadBalancer service by setting $LOAD_BALANCER=true
 KARMADA_APISERVER_SERVICE_TYPE="ClusterIP"
 
 if [ "${HOST_CLUSTER_TYPE}" = "local" ]; then # local mode
   KARMADA_APISERVER_IP=$(util::get_apiserver_ip_from_kubeconfig "${HOST_CLUSTER_NAME}")
 else # remote mode
 # KARMADA_APISERVER_IP will be got when Karmada API Server is ready
-  if [ "${CLUSTER_IP_ONLY}" = false ]; then
+  if [ "${LOAD_BALANCER}" = true ]; then
     KARMADA_APISERVER_SERVICE_TYPE="LoadBalancer"
   fi
   HOST_CLUSTER_TYPE="remote" # make sure HOST_CLUSTER_TYPE is in local and remote
@@ -173,7 +173,7 @@ util::wait_pod_ready "${APISERVER_POD_LABEL}" "${KARMADA_SYSTEM_NAMESPACE}"
 if [ "${HOST_CLUSTER_TYPE}" = "remote" ]; then
   case $KARMADA_APISERVER_SERVICE_TYPE in
     ClusterIP)
-      KARMADA_APISERVER_IP=$(kubectl get service karmada-apiserver -n "${KARMADA_SYSTEM_NAMESPACE}" -o=jsonpath='{.spec.clusterIP}')
+      KARMADA_APISERVER_IP=$(kubectl get pod -l app=karmada-apiserver -n "${KARMADA_SYSTEM_NAMESPACE}" -o=jsonpath='{.items[0].status.podIP}')
     ;;
     LoadBalancer)
       if util::wait_service_external_ip "karmada-apiserver" "${KARMADA_SYSTEM_NAMESPACE}"; then

hack/remote-up-karmada.sh

@@ -6,13 +6,13 @@ set -o pipefail
 
 function usage() {
   echo "This script will deploy karmada control plane to a given cluster."
-  echo "Usage: hack/remote-up-karmada.sh <KUBECONFIG> <CONTEXT_NAME> [CLUSTER_IP_ONLY]"
+  echo "Usage: hack/remote-up-karmada.sh <KUBECONFIG> <CONTEXT_NAME> [LOAD_BALANCER]"
   echo "Example: hack/remote-up-karmada.sh ~/.kube/config karmada-host"
   echo -e "Parameters:\n\tKUBECONFIG\tYour cluster's kubeconfig that you want to install to"
   echo -e "\tCONTEXT_NAME\tThe name of context in 'kubeconfig'"
-  echo -e "\tCLUSTER_IP_ONLY\tThis option default is 'false', and there will create a 'LoadBalancer' type service
+  echo -e "\tLOAD_BALANCER\tThis option default is 'false', and there will directly use 'hostNetwork' to communicate
-  \t\t\tfor karmada apiserver so that it can easy communicate outside the karmada-host cluster,
+  \t\t\toutside the karmada-host cluster
-  \t\t\tif you want only a 'ClusterIP' type service for karmada apiserver, set as 'true'."
+  \t\t\tif you want to create a 'LoadBalancer' type service for karmada apiserver, set as 'true'."
 }
 
 if [[ $# -lt 2 ]]; then
@@ -39,8 +39,8 @@ then
 fi
 
 if [ "${3:-false}" = true ]; then
-  CLUSTER_IP_ONLY=true
+  LOAD_BALANCER=true
-  export CLUSTER_IP_ONLY
+  export LOAD_BALANCER
 fi
 
 # deploy karmada control plane