Add network router and resource (#189)

This change adds two new resources, NetworkRouter and NetworkResource,
which enable clusters to expose Kubernetes services to Netbird.

The NetworkRouter is responsible for creating the network, group, setup
key and routing peer all of which are unique to the isntance. Along with
the deployment of the client in the cluster.

The NetworkResource exposes a service by linking to the specific router
it wants to expose to. This makes coupling between the resource and
network easy to understand.

Routers also set a DNS zone which is used to give names to resources
based on the name and namespace of the service being exposed.

Part of #172

Signed-off-by: Philip Laine <philip.laine@gmail.com>

pkg/applyconfigurations/api/v1alpha1/networkresourcespec.go

@@ -0,0 +1,55 @@
+// Code generated by controller-gen. DO NOT EDIT.
+
+package v1alpha1
+
+import (
+	v1 "k8s.io/api/core/v1"
+)
+
+// NetworkResourceSpecApplyConfiguration represents a declarative configuration of the NetworkResourceSpec type for use
+// with apply.
+//
+// NetworkResourceSpec defines the desired state of NetworkResource.
+type NetworkResourceSpecApplyConfiguration struct {
+	// NetworkRouterRef is a reference to the network and router where the resource will be created.
+	NetworkRouterRef *CrossNamespaceReferenceApplyConfiguration `json:"networkRouterRef,omitempty"`
+	// ServiceRef is a reference to the service to expose in the Network.
+	ServiceRef *v1.LocalObjectReference `json:"serviceRef,omitempty"`
+	// Groups are references to groups that the resource will be a part of.
+	Groups []ResourceReferenceApplyConfiguration `json:"groups,omitempty"`
+}
+
+// NetworkResourceSpecApplyConfiguration constructs a declarative configuration of the NetworkResourceSpec type for use with
+// apply.
+func NetworkResourceSpec() *NetworkResourceSpecApplyConfiguration {
+	return &NetworkResourceSpecApplyConfiguration{}
+}
+
+// WithNetworkRouterRef sets the NetworkRouterRef field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the NetworkRouterRef field is set to the value of the last call.
+func (b *NetworkResourceSpecApplyConfiguration) WithNetworkRouterRef(value *CrossNamespaceReferenceApplyConfiguration) *NetworkResourceSpecApplyConfiguration {
+	b.NetworkRouterRef = value
+	return b
+}
+
+// WithServiceRef sets the ServiceRef field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the ServiceRef field is set to the value of the last call.
+func (b *NetworkResourceSpecApplyConfiguration) WithServiceRef(value v1.LocalObjectReference) *NetworkResourceSpecApplyConfiguration {
+	b.ServiceRef = &value
+	return b
+}
+
+// WithGroups adds the given value to the Groups field in the declarative configuration
+// and returns the receiver, so that objects can be build by chaining "With" function invocations.
+// If called multiple times, values provided by each call will be appended to the Groups field.
+func (b *NetworkResourceSpecApplyConfiguration) WithGroups(values ...*ResourceReferenceApplyConfiguration) *NetworkResourceSpecApplyConfiguration {
+	for i := range values {
+		if values[i] == nil {
+			panic("nil value passed to WithGroups")
+		}
+		b.Groups = append(b.Groups, *values[i])
+	}
+	return b
+}