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service_control.go
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service_control.go
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package controller
import (
"fmt"
kapiv1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/record"
rapi "github.com/amadeusitgroup/redis-operator/pkg/api/redis/v1"
"github.com/amadeusitgroup/redis-operator/pkg/controller/pod"
)
// ServicesControlInterface inferface for the ServicesControl
type ServicesControlInterface interface {
// CreateRedisClusterService used to create the Kubernetes Service needed to access the Redis Cluster
CreateRedisClusterService(redisCluster *rapi.RedisCluster) (*kapiv1.Service, error)
// DeleteRedisClusterService used to delete the Kubernetes Service linked to the Redis Cluster
DeleteRedisClusterService(redisCluster *rapi.RedisCluster) error
// GetRedisClusterService used to retrieve the Kubernetes Service associated to the RedisCluster
GetRedisClusterService(redisCluster *rapi.RedisCluster) (*kapiv1.Service, error)
}
// ServicesControl contains all information for managing Kube Services
type ServicesControl struct {
KubeClient clientset.Interface
Recorder record.EventRecorder
}
// NewServicesControl builds and returns new ServicesControl instance
func NewServicesControl(client clientset.Interface, rec record.EventRecorder) *ServicesControl {
ctrl := &ServicesControl{
KubeClient: client,
Recorder: rec,
}
return ctrl
}
// GetRedisClusterService used to retrieve the Kubernetes Service associated to the RedisCluster
func (s *ServicesControl) GetRedisClusterService(redisCluster *rapi.RedisCluster) (*kapiv1.Service, error) {
serviceName := getServiceName(redisCluster)
svc, err := s.KubeClient.CoreV1().Services(redisCluster.Namespace).Get(serviceName, metav1.GetOptions{})
if err != nil {
return nil, err
}
if svc.Name != serviceName {
return nil, fmt.Errorf("Couldn't find service named %s", serviceName)
}
return svc, nil
}
// CreateRedisClusterService used to create the Kubernetes Service needed to access the Redis Cluster
func (s *ServicesControl) CreateRedisClusterService(redisCluster *rapi.RedisCluster) (*kapiv1.Service, error) {
serviceName := getServiceName(redisCluster)
desiredlabels, err := pod.GetLabelsSet(redisCluster)
if err != nil {
return nil, err
}
desiredAnnotations, err := pod.GetAnnotationsSet(redisCluster)
if err != nil {
return nil, err
}
newService := &kapiv1.Service{
ObjectMeta: metav1.ObjectMeta{
Labels: desiredlabels,
Annotations: desiredAnnotations,
Name: serviceName,
OwnerReferences: []metav1.OwnerReference{pod.BuildOwnerReference(redisCluster)},
},
Spec: kapiv1.ServiceSpec{
ClusterIP: "None",
Ports: []kapiv1.ServicePort{{Port: 6379, Name: "redis"}},
Selector: desiredlabels,
},
}
return s.KubeClient.CoreV1().Services(redisCluster.Namespace).Create(newService)
}
// DeleteRedisClusterService used to delete the Kubernetes Service linked to the Redis Cluster
func (s *ServicesControl) DeleteRedisClusterService(redisCluster *rapi.RedisCluster) error {
serviceName := getServiceName(redisCluster)
return s.KubeClient.CoreV1().Services(redisCluster.Namespace).Delete(serviceName, nil)
}
func getServiceName(redisCluster *rapi.RedisCluster) string {
serviceName := redisCluster.Name
if redisCluster.Spec.ServiceName != "" {
serviceName = redisCluster.Spec.ServiceName
}
return serviceName
}