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cr.go
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cr.go
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// Copyright 2017 The nats-operator Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package client
import (
"context"
"errors"
"github.com/nats-io/nats-operator/pkg/apis/nats/v1alpha2"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
"k8s.io/client-go/rest"
)
type NatsClusterCR interface {
// Create creates a NATS cluster CR with the desired CR
Create(ctx context.Context, cl *v1alpha2.NatsCluster) (*v1alpha2.NatsCluster, error)
// Get returns the specified NATS cluster CR
Get(ctx context.Context, namespace, name string) (*v1alpha2.NatsCluster, error)
// Delete deletes the specified NATS cluster CR
Delete(ctx context.Context, namespace, name string) error
// Update updates the NATS cluster CR.
Update(ctx context.Context, natsCluster *v1alpha2.NatsCluster) (*v1alpha2.NatsCluster, error)
}
type natsClusterCR struct {
client *rest.RESTClient
crScheme *runtime.Scheme
paramCodec runtime.ParameterCodec
}
func NewCRClient(cfg *rest.Config) (NatsClusterCR, error) {
cli, crScheme, err := New(cfg)
if err != nil {
return nil, err
}
return &natsClusterCR{
client: cli,
crScheme: crScheme,
paramCodec: runtime.NewParameterCodec(crScheme),
}, nil
}
// TODO: make this private so that we don't expose RESTClient once operator code uses this client instead of REST calls
func New(cfg *rest.Config) (*rest.RESTClient, *runtime.Scheme, error) {
crScheme := runtime.NewScheme()
if err := v1alpha2.AddToScheme(crScheme); err != nil {
return nil, nil, err
}
config := *cfg
config.GroupVersion = &v1alpha2.SchemeGroupVersion
config.APIPath = "/apis"
config.ContentType = runtime.ContentTypeJSON
config.NegotiatedSerializer = serializer.WithoutConversionCodecFactory{CodecFactory: serializer.NewCodecFactory(crScheme)}
client, err := rest.RESTClientFor(&config)
if err != nil {
return nil, nil, err
}
return client, crScheme, nil
}
func (c *natsClusterCR) Create(ctx context.Context, natsCluster *v1alpha2.NatsCluster) (*v1alpha2.NatsCluster, error) {
if len(natsCluster.Namespace) == 0 {
return nil, errors.New("need to set metadata.Namespace in NATS cluster CR")
}
result := &v1alpha2.NatsCluster{}
err := c.client.Post().
Namespace(natsCluster.Namespace).
Resource(v1alpha2.CRDResourcePlural).
Body(natsCluster).
Do(ctx).
Into(result)
return result, err
}
func (c *natsClusterCR) Get(ctx context.Context, namespace, name string) (*v1alpha2.NatsCluster, error) {
result := &v1alpha2.NatsCluster{}
err := c.client.Get().
Namespace(namespace).
Resource(v1alpha2.CRDResourcePlural).
Name(name).
Do(ctx).
Into(result)
return result, err
}
func (c *natsClusterCR) Delete(ctx context.Context, namespace, name string) error {
return c.client.Delete().
Namespace(namespace).
Resource(v1alpha2.CRDResourcePlural).
Name(name).
Do(ctx).
Error()
}
func (c *natsClusterCR) Update(ctx context.Context, natsCluster *v1alpha2.NatsCluster) (*v1alpha2.NatsCluster, error) {
if len(natsCluster.Namespace) == 0 {
return nil, errors.New("need to set metadata.Namespace in NATS cluster CR")
}
if len(natsCluster.Name) == 0 {
return nil, errors.New("need to set metadata.Name in NATS cluster CR")
}
result := &v1alpha2.NatsCluster{}
err := c.client.Put().
Namespace(natsCluster.Namespace).
Resource(v1alpha2.CRDResourcePlural).
Name(natsCluster.Name).
Body(natsCluster).
Do(ctx).
Into(result)
return result, err
}