On client CloseWrite, do CloseWrite instead of Close for backend

Co-authored-by: Mathieu Lonjaret <mathieu.lonjaret@gmail.com>

pkg/config/dynamic/tcp_config.go

@@ -45,7 +45,19 @@ type RouterTCPTLSConfig struct {
 
 // TCPLoadBalancerService holds the LoadBalancerService configuration.
 type TCPLoadBalancerService struct {
-	Servers []TCPServer `json:"servers,omitempty" toml:"servers,omitempty" yaml:"servers,omitempty" label-slice-as-struct:"server"`
+	// TerminationDelay, corresponds to the deadline that the proxy sets, after one
+	// of its connected peers indicates it has closed the writing capability of its
+	// connection, to close the reading capability as well, hence fully terminating the
+	// connection. It is a duration in milliseconds, defaulting to 100. A negative value
+	// means an infinite deadline (i.e. the reading capability is never closed).
+	TerminationDelay *int        `json:"terminationDelay,omitempty" toml:"terminationDelay,omitempty" yaml:"terminationDelay,omitempty"`
+	Servers          []TCPServer `json:"servers,omitempty" toml:"servers,omitempty" yaml:"servers,omitempty" label-slice-as-struct:"server"`
+}
+
+// SetDefaults Default values for a TCPLoadBalancerService
+func (l *TCPLoadBalancerService) SetDefaults() {
+	defaultTerminationDelay := 100 // in milliseconds
+	l.TerminationDelay = &defaultTerminationDelay
 }
 
 // Mergeable tells if the given service is mergeable.

pkg/config/dynamic/zz_generated.deepcopy.go

@@ -1155,6 +1155,11 @@ func (in *TCPConfiguration) DeepCopy() *TCPConfiguration {
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *TCPLoadBalancerService) DeepCopyInto(out *TCPLoadBalancerService) {
 	*out = *in
+	if in.TerminationDelay != nil {
+		in, out := &in.TerminationDelay, &out.TerminationDelay
+		*out = new(int)
+		**out = **in
+	}
 	if in.Servers != nil {
 		in, out := &in.Servers, &out.Servers
 		*out = make([]TCPServer, len(*in))