feat: kubesphere 4.0 (#6115)

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

---------

Signed-off-by: ci-bot <ci-bot@kubesphere.io>
Co-authored-by: ks-ci-bot <ks-ci-bot@example.com>
Co-authored-by: joyceliu <joyceliu@yunify.com>

pkg/multicluster/options.go

@@ -0,0 +1,99 @@
+/*
+ * Please refer to the LICENSE file in the root directory of the project.
+ * https://github.com/kubesphere/kubesphere/blob/master/LICENSE
+ */
+
+package multicluster
+
+import (
+	"errors"
+	"time"
+
+	"github.com/spf13/pflag"
+	"k8s.io/apimachinery/pkg/util/validation"
+)
+
+const (
+	DefaultResyncPeriod    = 900 * time.Second
+	DefaultHostClusterName = "host"
+)
+
+type Options struct {
+	// ProxyPublishService is the service name of multicluster component tower.
+	//   If this field provided, apiserver going to use the ingress.ip of this service.
+	// This field will be used when generating agent deployment yaml for joining clusters.
+	ProxyPublishService string `json:"proxyPublishService,omitempty" yaml:"proxyPublishService,omitempty"`
+
+	// ProxyPublishAddress is the public address of tower for all cluster agents.
+	//   This field takes precedence over field ProxyPublishService.
+	// If both field ProxyPublishService and ProxyPublishAddress are empty, apiserver will
+	// return 404 Not Found for all cluster agent yaml requests.
+	ProxyPublishAddress string `json:"proxyPublishAddress,omitempty" yaml:"proxyPublishAddress,omitempty"`
+
+	// AgentImage is the image used when generating deployment for all cluster agents.
+	AgentImage string `json:"agentImage,omitempty" yaml:"agentImage,omitempty"`
+
+	// ClusterControllerResyncPeriod is the resync period used by cluster controller.
+	ClusterControllerResyncPeriod time.Duration `json:"clusterControllerResyncPeriod,omitempty" yaml:"clusterControllerResyncPeriod,omitempty"`
+
+	// HostClusterName is the name of the control plane cluster, default set to host.
+	HostClusterName string `json:"hostClusterName,omitempty" yaml:"hostClusterName,omitempty"`
+
+	// ClusterName is the name of the current cluster,
+	// this value will be set by the cluster-controller and stored in the kubesphere-config configmap.
+	ClusterName string `json:"clusterName,omitempty" yaml:"clusterName,omitempty"`
+
+	// ClusterRole is the role of the current cluster,
+	// available values: host, member.
+	ClusterRole string `json:"clusterRole,omitempty" yaml:"clusterRole,omitempty"`
+
+	// ChartPath is the path of the helm chart file in the container. It is used to install ks-core in the member cluster.
+	// By default, no setting is required.
+	// If you need to customize it, you can mount the chart file to the ks-controller-manager Pod and change this value.
+	ChartPath string `json:"chartPath,omitempty" yaml:"chartPath,omitempty"`
+}
+
+// NewOptions returns a default nil options
+func NewOptions() *Options {
+	return &Options{
+		ProxyPublishAddress:           "",
+		ProxyPublishService:           "",
+		AgentImage:                    "kubesphere/tower:v1.0",
+		ClusterControllerResyncPeriod: DefaultResyncPeriod,
+		HostClusterName:               DefaultHostClusterName,
+	}
+}
+
+func (o *Options) Validate() []error {
+	var err []error
+
+	res := validation.IsQualifiedName(o.HostClusterName)
+	if len(res) == 0 {
+		return err
+	}
+
+	err = append(err, errors.New("failed to create the host cluster because of invalid cluster name"))
+	for _, str := range res {
+		err = append(err, errors.New(str))
+	}
+	return err
+}
+
+func (o *Options) AddFlags(fs *pflag.FlagSet, s *Options) {
+	fs.StringVar(&o.ProxyPublishService, "proxy-publish-service", s.ProxyPublishService, ""+
+		"Service name of tower. APIServer will use its ingress address as proxy publish address."+
+		"For example, tower.kubesphere-system.svc.")
+
+	fs.StringVar(&o.ProxyPublishAddress, "proxy-publish-address", s.ProxyPublishAddress, ""+
+		"Public address of tower, APIServer will use this field as proxy publish address. This field "+
+		"takes precedence over field proxy-publish-service. For example, http://139.198.121.121:8080.")
+
+	fs.StringVar(&o.AgentImage, "agent-image", s.AgentImage, ""+
+		"This field is used when generating deployment yaml for agent.")
+
+	fs.DurationVar(&o.ClusterControllerResyncPeriod, "cluster-controller-resync-period", s.ClusterControllerResyncPeriod,
+		"Cluster controller resync period to sync cluster resource. e.g. 2m 5m 10m ... default set to 2m")
+
+	fs.StringVar(&o.HostClusterName, "host-cluster-name", s.HostClusterName, "the name of the control plane"+
+		" cluster, default set to host")
+}