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Support NativeLB option in GatewayAPI provider

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Co-authored-by: Kevin Pollet <pollet.kevin@gmail.com>
This commit is contained in:
Romain 2024-10-02 10:34:04 +02:00 • committed by GitHub
parent d317cd90fc
commit 373095f1a8
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GPG key ID: B5690EEEBB952194
17 changed files with 734 additions and 19 deletions
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28
pkg/provider/kubernetes/gateway/kubernetes.go
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@ -65,6 +65,7 @@ type Provider struct {
ThrottleDuration ptypes.Duration `description:"Kubernetes refresh throttle duration" json:"throttleDuration,omitempty" toml:"throttleDuration,omitempty" yaml:"throttleDuration,omitempty" export:"true"`
ExperimentalChannel bool `description:"Toggles Experimental Channel resources support (TCPRoute, TLSRoute...)." json:"experimentalChannel,omitempty" toml:"experimentalChannel,omitempty" yaml:"experimentalChannel,omitempty" export:"true"`
StatusAddress *StatusAddress `description:"Defines the Kubernetes Gateway status address." json:"statusAddress,omitempty" toml:"statusAddress,omitempty" yaml:"statusAddress,omitempty" export:"true"`
NativeLBByDefault bool `description:"Defines whether to use Native Kubernetes load-balancing by default." json:"nativeLBByDefault,omitempty" toml:"nativeLBByDefault,omitempty" yaml:"nativeLBByDefault,omitempty" export:"true"`
EntryPoints map[string]Entrypoint `json:"-" toml:"-" yaml:"-" label:"-" file:"-"`
@ -873,8 +874,8 @@ func (p *Provider) allowedNamespaces(gatewayNamespace string, routeNamespaces *g
}
type backendAddress struct {
Address string
Port int32
IP string
Port int32
}
func (p *Provider) getBackendAddresses(namespace string, ref gatev1.BackendRef) ([]backendAddress, corev1.ServicePort, error) {
@ -889,6 +890,9 @@ func (p *Provider) getBackendAddresses(namespace string, ref gatev1.BackendRef)
if !exists {
return nil, corev1.ServicePort{}, errors.New("service not found")
}
if service.Spec.Type == corev1.ServiceTypeExternalName {
return nil, corev1.ServicePort{}, errors.New("type ExternalName is not supported for Kubernetes Service reference")
}
var svcPort *corev1.ServicePort
for _, p := range service.Spec.Ports {
@ -901,6 +905,22 @@ func (p *Provider) getBackendAddresses(namespace string, ref gatev1.BackendRef)
return nil, corev1.ServicePort{}, fmt.Errorf("service port %d not found", *ref.Port)
}
annotationsConfig, err := parseServiceAnnotations(service.Annotations)
if err != nil {
return nil, corev1.ServicePort{}, fmt.Errorf("parsing service annotations config: %w", err)
}
if p.NativeLBByDefault || annotationsConfig.Service.NativeLB {
if service.Spec.ClusterIP == "" || service.Spec.ClusterIP == "None" {
return nil, corev1.ServicePort{}, fmt.Errorf("no clusterIP found for service: %s/%s", service.Namespace, service.Name)
}
return []backendAddress{{
IP: service.Spec.ClusterIP,
Port: svcPort.Port,
}}, *svcPort, nil
}
endpointSlices, err := p.client.ListEndpointSlicesForService(namespace, string(ref.Name))
if err != nil {
return nil, corev1.ServicePort{}, fmt.Errorf("getting endpointslices: %w", err)
@ -935,8 +955,8 @@ func (p *Provider) getBackendAddresses(namespace string, ref gatev1.BackendRef)
uniqAddresses[address] = struct{}{}
backendServers = append(backendServers, backendAddress{
Address: address,
Port: port,
IP: address,
Port: port,
})
}
}