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Add k8s provider option to create services without endpoints

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Luca Berneking 2021-05-06 18:12:10 +02:00 • committed by GitHub
parent 0b48d5d0d2
commit 32e08f3510
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11 changed files with 107 additions and 42 deletions
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43
pkg/provider/kubernetes/ingress/kubernetes.go
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@ -37,15 +37,16 @@ const (
// Provider holds configurations of the provider.
type Provider struct {
Endpoint string `description:"Kubernetes server endpoint (required for external cluster client)." json:"endpoint,omitempty" toml:"endpoint,omitempty" yaml:"endpoint,omitempty"`
Token string `description:"Kubernetes bearer token (not needed for in-cluster client)." json:"token,omitempty" toml:"token,omitempty" yaml:"token,omitempty"`
CertAuthFilePath string `description:"Kubernetes certificate authority file path (not needed for in-cluster client)." json:"certAuthFilePath,omitempty" toml:"certAuthFilePath,omitempty" yaml:"certAuthFilePath,omitempty"`
Namespaces []string `description:"Kubernetes namespaces." json:"namespaces,omitempty" toml:"namespaces,omitempty" yaml:"namespaces,omitempty" export:"true"`
LabelSelector string `description:"Kubernetes Ingress label selector to use." json:"labelSelector,omitempty" toml:"labelSelector,omitempty" yaml:"labelSelector,omitempty" export:"true"`
IngressClass string `description:"Value of kubernetes.io/ingress.class annotation or IngressClass name to watch for." json:"ingressClass,omitempty" toml:"ingressClass,omitempty" yaml:"ingressClass,omitempty" export:"true"`
IngressEndpoint *EndpointIngress `description:"Kubernetes Ingress Endpoint." json:"ingressEndpoint,omitempty" toml:"ingressEndpoint,omitempty" yaml:"ingressEndpoint,omitempty" export:"true"`
ThrottleDuration ptypes.Duration `description:"Ingress refresh throttle duration" json:"throttleDuration,omitempty" toml:"throttleDuration,omitempty" yaml:"throttleDuration,omitempty" export:"true"`
lastConfiguration safe.Safe
Endpoint string `description:"Kubernetes server endpoint (required for external cluster client)." json:"endpoint,omitempty" toml:"endpoint,omitempty" yaml:"endpoint,omitempty"`
Token string `description:"Kubernetes bearer token (not needed for in-cluster client)." json:"token,omitempty" toml:"token,omitempty" yaml:"token,omitempty"`
CertAuthFilePath string `description:"Kubernetes certificate authority file path (not needed for in-cluster client)." json:"certAuthFilePath,omitempty" toml:"certAuthFilePath,omitempty" yaml:"certAuthFilePath,omitempty"`
Namespaces []string `description:"Kubernetes namespaces." json:"namespaces,omitempty" toml:"namespaces,omitempty" yaml:"namespaces,omitempty" export:"true"`
LabelSelector string `description:"Kubernetes Ingress label selector to use." json:"labelSelector,omitempty" toml:"labelSelector,omitempty" yaml:"labelSelector,omitempty" export:"true"`
IngressClass string `description:"Value of kubernetes.io/ingress.class annotation or IngressClass name to watch for." json:"ingressClass,omitempty" toml:"ingressClass,omitempty" yaml:"ingressClass,omitempty" export:"true"`
IngressEndpoint *EndpointIngress `description:"Kubernetes Ingress Endpoint." json:"ingressEndpoint,omitempty" toml:"ingressEndpoint,omitempty" yaml:"ingressEndpoint,omitempty" export:"true"`
ThrottleDuration ptypes.Duration `description:"Ingress refresh throttle duration" json:"throttleDuration,omitempty" toml:"throttleDuration,omitempty" yaml:"throttleDuration,omitempty" export:"true"`
AllowEmptyServices bool `description:"Allow creation of services without endpoints." json:"allowEmptyServices,omitempty" toml:"allowEmptyServices,omitempty" yaml:"allowEmptyServices,omitempty" export:"true"`
lastConfiguration safe.Safe
}
// EndpointIngress holds the endpoint information for the Kubernetes provider.
@ -241,6 +242,14 @@ func (p *Provider) loadConfigurationFromIngresses(ctx context.Context, client Cl
continue
}
if len(service.LoadBalancer.Servers) == 0 && !p.AllowEmptyServices {
log.FromContext(ctx).
WithField("serviceName", ingress.Spec.DefaultBackend.Service.Name).
WithField("servicePort", ingress.Spec.DefaultBackend.Service.Port.String()).
Errorf("Skipping service: no endpoints found")
continue
}
rt := &dynamic.Router{
Rule: "PathPrefix(`/`)",
Priority: math.MinInt32,
@ -278,6 +287,14 @@ func (p *Provider) loadConfigurationFromIngresses(ctx context.Context, client Cl
continue
}
if len(service.LoadBalancer.Servers) == 0 && !p.AllowEmptyServices {
log.FromContext(ctx).
WithField("serviceName", pa.Backend.Service.Name).
WithField("servicePort", pa.Backend.Service.Port.String()).
Errorf("Skipping service: no endpoints found")
continue
}
portString := pa.Backend.Service.Port.Name
if len(pa.Backend.Service.Port.Name) == 0 {
@ -534,10 +551,6 @@ func loadService(client Client, namespace string, backend networkingv1.IngressBa
return nil, errors.New("endpoints not found")
}
if len(endpoints.Subsets) == 0 {
return nil, errors.New("subset not found")
}
var port int32
for _, subset := range endpoints.Subsets {
for _, p := range subset.Ports {
@ -562,10 +575,6 @@ func loadService(client Client, namespace string, backend networkingv1.IngressBa
}
}
if len(svc.LoadBalancer.Servers) == 0 {
return nil, errors.New("no valid subset found")
}
return svc, nil
}