add options for components

admission/admission.go

@@ -2,8 +2,11 @@ package admission
 
 import "context"
 
+type Options struct{}
+type Option func(opts *Options)
+
 type Admission interface {
-	Admit(ctx context.Context, addr string) bool
+	Admit(ctx context.Context, addr string, opts ...Option) bool
 }
 
 type admissionGroup struct {
@@ -16,9 +19,9 @@ func AdmissionGroup(admissions ...Admission) Admission {
 	}
 }
 
-func (p *admissionGroup) Admit(ctx context.Context, addr string) bool {
+func (p *admissionGroup) Admit(ctx context.Context, addr string, opts ...Option) bool {
 	for _, admission := range p.admissions {
-		if admission != nil && !admission.Admit(ctx, addr) {
+		if admission != nil && !admission.Admit(ctx, addr, opts...) {
 			return false
 		}
 	}

auth/auth.go

@@ -2,9 +2,13 @@ package auth
 
 import "context"
 
+type Options struct{}
+
+type Option func(opts *Options)
+
 // Authenticator is an interface for user authentication.
 type Authenticator interface {
-	Authenticate(ctx context.Context, user, password string) (id string, ok bool)
+	Authenticate(ctx context.Context, user, password string, opts ...Option) (id string, ok bool)
 }
 
 type authenticatorGroup struct {
@@ -17,7 +21,7 @@ func AuthenticatorGroup(authers ...Authenticator) Authenticator {
 	}
 }
 
-func (p *authenticatorGroup) Authenticate(ctx context.Context, user, password string) (string, bool) {
+func (p *authenticatorGroup) Authenticate(ctx context.Context, user, password string, opts ...Option) (string, bool) {
 	if len(p.authers) == 0 {
 		return "", false
 	}
@@ -26,7 +30,7 @@ func (p *authenticatorGroup) Authenticate(ctx context.Context, user, password st
 			continue
 		}
 
-		if id, ok := auther.Authenticate(ctx, user, password); ok {
+		if id, ok := auther.Authenticate(ctx, user, password, opts...); ok {
 			return id, ok
 		}
 	}

hosts/hosts.go

@@ -5,7 +5,11 @@ import (
 	"net"
 )
 
+type Options struct{}
+
+type Option func(opts *Options)
+
 // HostMapper is a mapping from hostname to IP.
 type HostMapper interface {
-	Lookup(ctx context.Context, network, host string) ([]net.IP, bool)
+	Lookup(ctx context.Context, network, host string, opts ...Option) ([]net.IP, bool)
 }

ingress/ingress.go

@@ -2,7 +2,15 @@ package ingress
 
 import "context"
 
+type GetOptions struct{}
+
+type GetOption func(opts *GetOptions)
+
+type SetOptions struct{}
+
+type SetOption func(opts *SetOptions)
+
 type Ingress interface {
-	Get(ctx context.Context, host string) string
-	Set(ctx context.Context, host, endpoint string)
+	Get(ctx context.Context, host string, opts ...GetOption) string
+	Set(ctx context.Context, host, endpoint string, opts ...SetOption)
 }

recorder/recorder.go

@@ -4,8 +4,11 @@ import (
 	"context"
 )
 
+type RecordOptions struct{}
+type RecordOption func(opts *RecordOptions)
+
 type Recorder interface {
-	Record(ctx context.Context, b []byte) error
+	Record(ctx context.Context, b []byte, opts ...RecordOption) error
 }
 
 type RecorderObject struct {

resolver/resolver.go

@@ -10,8 +10,12 @@ var (
 	ErrInvalid = errors.New("invalid resolver")
 )
 
+type Options struct{}
+
+type Option func(opts *Options)
+
 type Resolver interface {
 	// Resolve returns a slice of the host's IPv4 and IPv6 addresses.
 	// The network should be 'ip', 'ip4' or 'ip6', default network is 'ip'.
-	Resolve(ctx context.Context, network, host string) ([]net.IP, error)
+	Resolve(ctx context.Context, network, host string, opts ...Option) ([]net.IP, error)
 }