UDP support

Co-authored-by: Julien Salleyron <julien.salleyron@gmail.com>

pkg/config/dynamic/udp_config.go

@@ -0,0 +1,82 @@
+package dynamic
+
+import (
+	"reflect"
+)
+
+// +k8s:deepcopy-gen=true
+
+// UDPConfiguration contains all the UDP configuration parameters.
+type UDPConfiguration struct {
+	Routers  map[string]*UDPRouter  `json:"routers,omitempty" toml:"routers,omitempty" yaml:"routers,omitempty"`
+	Services map[string]*UDPService `json:"services,omitempty" toml:"services,omitempty" yaml:"services,omitempty"`
+}
+
+// +k8s:deepcopy-gen=true
+
+// UDPService defines the configuration for a UDP service. All fields are mutually exclusive.
+type UDPService struct {
+	LoadBalancer *UDPServersLoadBalancer `json:"loadBalancer,omitempty" toml:"loadBalancer,omitempty" yaml:"loadBalancer,omitempty"`
+	Weighted     *UDPWeightedRoundRobin  `json:"weighted,omitempty" toml:"weighted,omitempty" yaml:"weighted,omitempty" label:"-"`
+}
+
+// +k8s:deepcopy-gen=true
+
+// UDPWeightedRoundRobin is a weighted round robin UDP load-balancer of services.
+type UDPWeightedRoundRobin struct {
+	Services []UDPWRRService `json:"services,omitempty" toml:"services,omitempty" yaml:"services,omitempty"`
+}
+
+// +k8s:deepcopy-gen=true
+
+// UDPWRRService is a reference to a UDP service load-balanced with weighted round robin.
+type UDPWRRService struct {
+	Name   string `json:"name,omitempty" toml:"name,omitempty" yaml:"name,omitempty"`
+	Weight *int   `json:"weight,omitempty" toml:"weight,omitempty" yaml:"weight,omitempty"`
+}
+
+// SetDefaults sets the default values for a UDPWRRService.
+func (w *UDPWRRService) SetDefaults() {
+	defaultWeight := 1
+	w.Weight = &defaultWeight
+}
+
+// +k8s:deepcopy-gen=true
+
+// UDPRouter defines the configuration for an UDP router.
+type UDPRouter struct {
+	EntryPoints []string `json:"entryPoints,omitempty" toml:"entryPoints,omitempty" yaml:"entryPoints,omitempty"`
+	Service     string   `json:"service,omitempty" toml:"service,omitempty" yaml:"service,omitempty"`
+}
+
+// +k8s:deepcopy-gen=true
+
+// UDPServersLoadBalancer defines the configuration for a load-balancer of UDP servers.
+type UDPServersLoadBalancer struct {
+	Servers []UDPServer `json:"servers,omitempty" toml:"servers,omitempty" yaml:"servers,omitempty" label-slice-as-struct:"server"`
+}
+
+// Mergeable reports whether the given load-balancer can be merged with the receiver.
+func (l *UDPServersLoadBalancer) Mergeable(loadBalancer *UDPServersLoadBalancer) bool {
+	savedServers := l.Servers
+	defer func() {
+		l.Servers = savedServers
+	}()
+	l.Servers = nil
+
+	savedServersLB := loadBalancer.Servers
+	defer func() {
+		loadBalancer.Servers = savedServersLB
+	}()
+	loadBalancer.Servers = nil
+
+	return reflect.DeepEqual(l, loadBalancer)
+}
+
+// +k8s:deepcopy-gen=true
+
+// UDPServer defines a UDP server configuration.
+type UDPServer struct {
+	Address string `json:"address,omitempty" toml:"address,omitempty" yaml:"address,omitempty" label:"-"`
+	Port    string `toml:"-" json:"-" yaml:"-"`
+}