/
frontend_types.go
205 lines (170 loc) · 5.25 KB
/
frontend_types.go
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package v1alpha1
import (
"fmt"
"strings"
"github.com/go-openapi/strfmt"
"github.com/haproxytech/client-native/v5/configuration"
"github.com/haproxytech/client-native/v5/models"
parser "github.com/haproxytech/config-parser/v5"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/utils/ptr"
)
// FrontendSpec defines the desired state of Frontend
type FrontendSpec struct {
BaseSpec `json:",inline"`
// Binds defines the frontend listening addresses, ports and its configuration.
// +kubebuilder:validation:MinItems=1
Binds []Bind `json:"binds"`
// BackendSwitching rules specify the specific backend used if/unless an ACL-based condition is matched.
// +optional
BackendSwitching []BackendSwitchingRule `json:"backendSwitching,omitempty"`
// DefaultBackend to use when no 'use_backend' rule has been matched.
DefaultBackend corev1.LocalObjectReference `json:"defaultBackend"`
}
type BackendSwitchingRule struct {
Rule `json:",inline"`
// Backend reference used to resolve the backend name.
Backend BackendReference `json:"backend,omitempty"`
}
func (b *BackendSwitchingRule) Model() (models.BackendSwitchingRule, error) {
model := models.BackendSwitchingRule{
Cond: b.ConditionType,
CondTest: b.Condition,
Index: ptr.To(int64(0)),
Name: b.Backend.String(),
}
return model, model.Validate(strfmt.Default)
}
type BackendReference struct {
// Name of a specific backend
Name *string `json:"name,omitempty"`
// Mapping of multiple backends
RegexMapping *RegexBackendMapping `json:"regexMapping,omitempty"`
}
func (b *BackendReference) String() string {
if b.RegexMapping != nil {
return fmt.Sprintf("%%[%s,map_reg(%s)]", b.RegexMapping.Parameter, b.RegexMapping.FilePath())
}
return ptr.Deref(b.Name, "")
}
func (r *RegexBackendMapping) FoundCondition() string {
return fmt.Sprintf("{ %s,map_reg(%s) -m found }", r.Parameter, r.FilePath())
}
type RegexBackendMapping struct {
// Name to identify the mapping
Name string `json:"name"`
// Parameter which will be used for the mapping (default: base)
// +kubebuilder:default=base
Parameter string `json:"parameter"`
// LabelSelector to select multiple backends
LabelSelector metav1.LabelSelector `json:"selector"`
}
func (r *RegexBackendMapping) FilePath() string {
return fmt.Sprintf("/usr/local/etc/haproxy/%s.map", strings.TrimSuffix(r.Name, ".map"))
}
//+kubebuilder:object:root=true
//+kubebuilder:subresource:status
//+kubebuilder:printcolumn:name=Mode,type=string,JSONPath=`.spec.mode`
//+kubebuilder:printcolumn:name=Phase,type=string,JSONPath=`.status.phase`
// Frontend is the Schema for the frontends API
type Frontend struct {
metav1.TypeMeta `json:",inline"`
metav1.ObjectMeta `json:"metadata,omitempty"`
Spec FrontendSpec `json:"spec,omitempty"`
Status Status `json:"status,omitempty"`
}
var _ Object = &Frontend{}
func (f *Frontend) SetStatus(status Status) {
f.Status = status
}
func (f *Frontend) GetStatus() Status {
return f.Status
}
func (f *Frontend) Model() (models.Frontend, error) {
model := models.Frontend{
Name: f.Name,
Mode: f.Spec.Mode,
DefaultBackend: f.Spec.DefaultBackend.Name,
}
if f.Spec.Forwardfor != nil {
var enabled *string
if f.Spec.Forwardfor.Enabled {
enabled = ptr.To(models.ForwardforEnabledEnabled)
}
model.Forwardfor = &models.Forwardfor{
Enabled: enabled,
Except: f.Spec.Forwardfor.Except,
Header: f.Spec.Forwardfor.Header,
Ifnone: f.Spec.Forwardfor.Ifnone,
}
}
for name, timeout := range f.Spec.Timeouts {
switch name {
case "client":
model.ClientTimeout = ptr.To(timeout.Milliseconds())
case "http-keep-alive":
model.HTTPKeepAliveTimeout = ptr.To(timeout.Milliseconds())
case "http-request":
model.HTTPRequestTimeout = ptr.To(timeout.Milliseconds())
default:
return model, fmt.Errorf("timeout %s unknown", name)
}
}
for _, ef := range f.Spec.ErrorFiles {
m, err := ef.Model()
if err == nil {
model.ErrorFiles = append(model.ErrorFiles, &m)
}
}
return model, model.Validate(strfmt.Default)
}
func (f *Frontend) AddToParser(p parser.Parser) error {
err := p.SectionsCreate(parser.Frontends, f.Name)
if err != nil {
return err
}
var frontend models.Frontend
frontend, err = f.Model()
if err != nil {
return err
}
if err := configuration.CreateEditSection(&frontend, parser.Frontends, f.Name, p); err != nil {
return err
}
err = f.Spec.BaseSpec.AddToParser(p, parser.Frontends, f.Name)
if err != nil {
return err
}
for idx, bind := range f.Spec.Binds {
model, err := bind.Model()
if err != nil {
return err
}
err = p.Insert(parser.Frontends, f.Name, "bind", configuration.SerializeBind(model), idx)
if err != nil {
return err
}
}
for idx, rule := range f.Spec.BackendSwitching {
model, err := rule.Model()
if err != nil {
return err
}
err = p.Insert(parser.Frontends, f.Name, "use_backend", configuration.SerializeBackendSwitchingRule(model), idx)
if err != nil {
return err
}
}
return nil
}
//+kubebuilder:object:root=true
// FrontendList contains a list of Fronted
type FrontendList struct {
metav1.TypeMeta `json:",inline"`
metav1.ListMeta `json:"metadata,omitempty"`
Items []Frontend `json:"items"`
}
func init() {
SchemeBuilder.Register(&Frontend{}, &FrontendList{})
}