forked from coreos/etcd-operator
/
crd.go
164 lines (145 loc) · 5.36 KB
/
crd.go
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// Copyright 2016 The etcd-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 k8sutil
import (
"encoding/json"
"fmt"
"net/http"
"time"
"github.com/coreos/etcd-operator/pkg/spec"
"github.com/coreos/etcd-operator/pkg/util/retryutil"
apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
apiextensionsclient "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/rest"
)
// TODO: replace this package with Operator client
// EtcdClusterCRUpdateFunc is a function to be used when atomically
// updating a Cluster CR.
type EtcdClusterCRUpdateFunc func(*spec.EtcdCluster)
func WatchClusters(host, ns string, httpClient *http.Client, resourceVersion string) (*http.Response, error) {
return httpClient.Get(fmt.Sprintf("%s/apis/%s/namespaces/%s/%s?watch=true&resourceVersion=%s",
host, spec.SchemeGroupVersion.String(), ns, spec.CRDResourcePlural, resourceVersion))
}
func GetClusterList(restcli rest.Interface, ns string) (*spec.EtcdClusterList, error) {
b, err := restcli.Get().RequestURI(listClustersURI(ns)).DoRaw()
if err != nil {
return nil, err
}
clusters := &spec.EtcdClusterList{}
if err := json.Unmarshal(b, clusters); err != nil {
return nil, err
}
return clusters, nil
}
func listClustersURI(ns string) string {
return fmt.Sprintf("/apis/%s/namespaces/%s/%s", spec.SchemeGroupVersion.String(), ns, spec.CRDResourcePlural)
}
func GetClusterTPRObject(restcli rest.Interface, ns, name string) (*spec.EtcdCluster, error) {
uri := fmt.Sprintf("/apis/%s/namespaces/%s/%s/%s", spec.SchemeGroupVersion.String(), ns, spec.CRDResourcePlural, name)
b, err := restcli.Get().RequestURI(uri).DoRaw()
if err != nil {
return nil, err
}
return readClusterCR(b)
}
// AtomicUpdateClusterTPRObject will get the latest result of a cluster,
// let user modify it, and update the cluster with modified result
// The entire process would be retried if there is a conflict of resource version
func AtomicUpdateClusterTPRObject(restcli rest.Interface, name, namespace string, maxRetries int, updateFunc EtcdClusterCRUpdateFunc) (*spec.EtcdCluster, error) {
var updatedCluster *spec.EtcdCluster
err := retryutil.Retry(1*time.Second, maxRetries, func() (done bool, err error) {
currCluster, err := GetClusterTPRObject(restcli, namespace, name)
if err != nil {
return false, err
}
updateFunc(currCluster)
updatedCluster, err = UpdateClusterTPRObject(restcli, namespace, currCluster)
if err != nil {
if apierrors.IsConflict(err) {
return false, nil
}
return false, err
}
return true, nil
})
return updatedCluster, err
}
func UpdateClusterTPRObject(restcli rest.Interface, ns string, c *spec.EtcdCluster) (*spec.EtcdCluster, error) {
uri := fmt.Sprintf("/apis/%s/namespaces/%s/%s/%s", spec.SchemeGroupVersion.String(), ns, spec.CRDResourcePlural, c.Name)
b, err := restcli.Put().RequestURI(uri).Body(c).DoRaw()
if err != nil {
return nil, err
}
return readClusterCR(b)
}
func readClusterCR(b []byte) (*spec.EtcdCluster, error) {
cluster := &spec.EtcdCluster{}
if err := json.Unmarshal(b, cluster); err != nil {
return nil, fmt.Errorf("read cluster CR from json data failed: %v", err)
}
return cluster, nil
}
func CreateCRD(clientset apiextensionsclient.Interface) error {
crd := &apiextensionsv1beta1.CustomResourceDefinition{
ObjectMeta: metav1.ObjectMeta{
Name: spec.CRDName,
},
Spec: apiextensionsv1beta1.CustomResourceDefinitionSpec{
Group: spec.SchemeGroupVersion.Group,
Version: spec.SchemeGroupVersion.Version,
Scope: apiextensionsv1beta1.NamespaceScoped,
Names: apiextensionsv1beta1.CustomResourceDefinitionNames{
Plural: spec.CRDResourcePlural,
Kind: spec.CRDResourceKind,
ShortNames: []string{"etcd"},
},
},
}
_, err := clientset.ApiextensionsV1beta1().CustomResourceDefinitions().Create(crd)
return err
}
func WaitCRDReady(clientset apiextensionsclient.Interface) error {
err := retryutil.Retry(5*time.Second, 20, func() (bool, error) {
crd, err := clientset.ApiextensionsV1beta1().CustomResourceDefinitions().Get(spec.CRDName, metav1.GetOptions{})
if err != nil {
return false, err
}
for _, cond := range crd.Status.Conditions {
switch cond.Type {
case apiextensionsv1beta1.Established:
if cond.Status == apiextensionsv1beta1.ConditionTrue {
return true, nil
}
case apiextensionsv1beta1.NamesAccepted:
if cond.Status == apiextensionsv1beta1.ConditionFalse {
return false, fmt.Errorf("Name conflict: %v", cond.Reason)
}
}
}
return false, nil
})
if err != nil {
return fmt.Errorf("wait CRD created failed: %v", err)
}
return nil
}
func MustNewKubeExtClient() apiextensionsclient.Interface {
cfg, err := InClusterConfig()
if err != nil {
panic(err)
}
return apiextensionsclient.NewForConfigOrDie(cfg)
}