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Enable Ingress Status updates

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This commit is contained in:
Daniel Tomcej 2018-05-18 06:12:03 -06:00 • committed by Traefiker Bot
parent c37b040217
commit 9227d32d57
6 changed files with 289 additions and 14 deletions
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69
provider/kubernetes/kubernetes.go
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@ -36,17 +36,25 @@ const (
traefikDefaultIngressClass = "traefik"
)
// IngressEndpoint holds the endpoint information for the Kubernetes provider
type IngressEndpoint struct {
IP string `description:"IP used for Kubernetes Ingress endpoints"`
Hostname string `description:"Hostname used for Kubernetes Ingress endpoints"`
PublishedService string `description:"Published Kubernetes Service to copy status from"`
}
// Provider holds configurations of the provider.
type Provider struct {
provider.BaseProvider `mapstructure:",squash" export:"true"`
Endpoint string `description:"Kubernetes server endpoint (required for external cluster client)"`
Token string `description:"Kubernetes bearer token (not needed for in-cluster client)"`
CertAuthFilePath string `description:"Kubernetes certificate authority file path (not needed for in-cluster client)"`
DisablePassHostHeaders bool `description:"Kubernetes disable PassHost Headers" export:"true"`
EnablePassTLSCert bool `description:"Kubernetes enable Pass TLS Client Certs" export:"true"`
Namespaces Namespaces `description:"Kubernetes namespaces" export:"true"`
LabelSelector string `description:"Kubernetes Ingress label selector to use" export:"true"`
IngressClass string `description:"Value of kubernetes.io/ingress.class annotation to watch for" export:"true"`
Endpoint string `description:"Kubernetes server endpoint (required for external cluster client)"`
Token string `description:"Kubernetes bearer token (not needed for in-cluster client)"`
CertAuthFilePath string `description:"Kubernetes certificate authority file path (not needed for in-cluster client)"`
DisablePassHostHeaders bool `description:"Kubernetes disable PassHost Headers" export:"true"`
EnablePassTLSCert bool `description:"Kubernetes enable Pass TLS Client Certs" export:"true"`
Namespaces Namespaces `description:"Kubernetes namespaces" export:"true"`
LabelSelector string `description:"Kubernetes Ingress label selector to use" export:"true"`
IngressClass string `description:"Value of kubernetes.io/ingress.class annotation to watch for" export:"true"`
IngressEndpoint *IngressEndpoint `description:"Kubernetes Ingress Endpoint"`
lastConfiguration safe.Safe
}
@ -125,10 +133,12 @@ func (p *Provider) Provide(configurationChan chan<- types.ConfigMessage, pool *s
return nil
case event := <-eventsChan:
log.Debugf("Received Kubernetes event kind %T", event)
templateObjects, err := p.loadIngresses(k8sClient)
if err != nil {
return err
}
if reflect.DeepEqual(p.lastConfiguration.Get(), templateObjects) {
log.Debugf("Skipping Kubernetes event kind %T", event)
} else {
@ -326,10 +336,53 @@ func (p *Provider) loadIngresses(k8sClient Client) (*types.Configuration, error)
}
}
}
err = p.updateIngressStatus(i, k8sClient)
if err != nil {
log.Errorf("Cannot update Ingress %s/%s due to error: %v", i.Namespace, i.Name, err)
}
}
return &templateObjects, nil
}
func (p *Provider) updateIngressStatus(i *extensionsv1beta1.Ingress, k8sClient Client) error {
// Only process if an IngressEndpoint has been configured
if p.IngressEndpoint == nil {
return nil
}
if len(p.IngressEndpoint.PublishedService) == 0 {
if len(p.IngressEndpoint.IP) == 0 && len(p.IngressEndpoint.Hostname) == 0 {
return errors.New("publishedService or ip or hostname must be defined")
}
return k8sClient.UpdateIngressStatus(i.Namespace, i.Name, p.IngressEndpoint.IP, p.IngressEndpoint.Hostname)
}
serviceInfo := strings.Split(p.IngressEndpoint.PublishedService, "/")
if len(serviceInfo) != 2 {
return fmt.Errorf("invalid publishedService format (expected 'namespace/service' format): %s", p.IngressEndpoint.PublishedService)
}
serviceNamespace, serviceName := serviceInfo[0], serviceInfo[1]
service, exists, err := k8sClient.GetService(serviceNamespace, serviceName)
if err != nil {
return fmt.Errorf("cannot get service %s, received error: %s", p.IngressEndpoint.PublishedService, err)
}
if exists && service.Status.LoadBalancer.Ingress == nil {
// service exists, but has no Load Balancer status
log.Debugf("Skipping updating Ingress %s/%s due to service %s having no status set", i.Namespace, i.Name, p.IngressEndpoint.PublishedService)
return nil
}
if !exists {
return fmt.Errorf("missing service: %s", p.IngressEndpoint.PublishedService)
}
return k8sClient.UpdateIngressStatus(i.Namespace, i.Name, service.Status.LoadBalancer.Ingress[0].IP, service.Status.LoadBalancer.Ingress[0].Hostname)
}
func (p *Provider) loadConfig(templateObjects types.Configuration) *types.Configuration {
var FuncMap = template.FuncMap{}
configuration, err := p.GetConfiguration("templates/kubernetes.tmpl", FuncMap, templateObjects)