forked from rook/rook
Travis Nielsen
388ff3e78b
The mgr daemon may be failed over by ceph if the active mgr is not responding and the standby mgr is available. If the active mgr changes the services for the dashboard and metrics will be updated with a label selector for the new active mgr. The services cannot direct traffic to the standby mgr or else they will be incorrectly redirected to the active mgr. Signed-off-by: Travis Nielsen <tnielsen@redhat.com>
98 lines
3.3 KiB
Go
98 lines
3.3 KiB
Go
/*
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Copyright 2019 The Rook Authors. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package k8sutil
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import (
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"context"
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"fmt"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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)
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// CreateOrUpdateService creates a service or updates the service declaratively if it already exists.
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func CreateOrUpdateService(
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clientset kubernetes.Interface, namespace string, serviceDefinition *v1.Service,
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) (*v1.Service, error) {
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ctx := context.TODO()
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name := serviceDefinition.Name
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logger.Debugf("creating service %s", name)
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s, err := clientset.CoreV1().Services(namespace).Create(ctx, serviceDefinition, metav1.CreateOptions{})
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if err != nil {
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if !errors.IsAlreadyExists(err) {
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return nil, fmt.Errorf("failed to create service %s. %+v", name, err)
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}
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s, err = UpdateService(clientset, namespace, serviceDefinition)
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if err != nil {
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return nil, fmt.Errorf("failed to update service %s. %+v", name, err)
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}
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} else {
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logger.Debugf("created service %s", s.Name)
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}
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return s, err
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}
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// UpdateService updates a service declaratively. If the service does not exist this is considered
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// an error condition.
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func UpdateService(
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clientset kubernetes.Interface, namespace string, serviceDefinition *v1.Service,
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) (*v1.Service, error) {
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ctx := context.TODO()
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name := serviceDefinition.Name
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logger.Debugf("updating service %s", name)
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existing, err := clientset.CoreV1().Services(namespace).Get(ctx, name, metav1.GetOptions{})
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if err != nil {
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return nil, fmt.Errorf("could not get existing service %s in order to update. %+v", name, err)
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}
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// ClusterIP is immutable for k8s services and cannot be left empty in k8s v1 API
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serviceDefinition.Spec.ClusterIP = existing.Spec.ClusterIP
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// ResourceVersion required to update services in k8s v1 API to prevent race conditions
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serviceDefinition.ResourceVersion = existing.ResourceVersion
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return clientset.CoreV1().Services(namespace).Update(ctx, serviceDefinition, metav1.UpdateOptions{})
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}
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// DeleteService deletes a Service and returns the error if any
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func DeleteService(clientset kubernetes.Interface, namespace, name string) error {
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ctx := context.TODO()
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err := clientset.CoreV1().Services(namespace).Delete(ctx, name, metav1.DeleteOptions{})
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if err != nil {
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if errors.IsNotFound(err) {
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return nil
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}
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}
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return err
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}
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// ParseServiceType parses a string and returns a*v1.ServiceType. If the ServiceType is invalid,
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// this should be considered an error.
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func ParseServiceType(serviceString string) v1.ServiceType {
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switch serviceString {
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case "ClusterIP":
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return v1.ServiceTypeClusterIP
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case "ExternalName":
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return v1.ServiceTypeExternalName
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case "NodePort":
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return v1.ServiceTypeNodePort
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case "LoadBalancer":
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return v1.ServiceTypeLoadBalancer
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}
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return v1.ServiceType("")
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}
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