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util: moved GetNodeLabels() under internal/util/k8s

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Signed-off-by: Praveen M <m.praveen@ibm.com>
This commit is contained in:
Praveen M 2023-10-30 13:50:30 +05:30 committed by mergify[bot]
parent 1b39b82a85
commit a93f3e24ba
3 changed files with 50 additions and 20 deletions
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8
internal/util/k8s/client.go
View File

@ -25,8 +25,14 @@ import (
"k8s.io/client-go/tools/clientcmd"
)
var kubeclient *kubernetes.Clientset
// NewK8sClient create kubernetes client.
func NewK8sClient() (*kubernetes.Clientset, error) {
if kubeclient != nil {
return kubeclient, nil
}
var cfg *rest.Config
var err error
cPath := os.Getenv("KUBERNETES_CONFIG_PATH")
@ -46,5 +52,7 @@ func NewK8sClient() (*kubernetes.Clientset, error) {
return nil, fmt.Errorf("failed to create client: %w", err)
}
kubeclient = client
return client, nil
}

39
internal/util/k8s/node.go Normal file
View File

@ -0,0 +1,39 @@
/*
Copyright 2023 The CephCSI 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/LICENSE2.0
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 k8s
import (
"context"
"fmt"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
func GetNodeLabels(nodeName string) (map[string]string, error) {
client, err := NewK8sClient()
if err != nil {
return nil, fmt.Errorf("can not get node %q information, failed "+
"to connect to Kubernetes: %w", nodeName, err)
}
node, err := client.CoreV1().Nodes().Get(context.TODO(), nodeName, metav1.GetOptions{})
if err != nil {
return nil, fmt.Errorf("failed to get node %q information: %w", nodeName, err)
}
return node.GetLabels(), nil
}

23
internal/util/topology.go
View File

@ -17,16 +17,14 @@ limitations under the License.
package util
import (
"context"
"encoding/json"
"fmt"
"strings"
"github.com/container-storage-interface/spec/lib/go/csi"
"github.com/ceph/ceph-csi/internal/util/k8s"
"github.com/ceph/ceph-csi/internal/util/log"
"github.com/container-storage-interface/spec/lib/go/csi"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
@ -34,21 +32,6 @@ const (
labelSeparator string = ","
)
func k8sGetNodeLabels(nodeName string) (map[string]string, error) {
client, err := k8s.NewK8sClient()
if err != nil {
return nil, fmt.Errorf("can not get node %q information, failed "+
"to connect to Kubernetes: %w", nodeName, err)
}
node, err := client.CoreV1().Nodes().Get(context.TODO(), nodeName, metav1.GetOptions{})
if err != nil {
return nil, fmt.Errorf("failed to get node %q information: %w", nodeName, err)
}
return node.GetLabels(), nil
}
// GetTopologyFromDomainLabels returns the CSI topology map, determined from
// the domain labels and their values from the CO system
// Expects domainLabels in arg to be in the format "[prefix/]<name>,[prefix/]<name>,...",.
@ -82,7 +65,7 @@ func GetTopologyFromDomainLabels(domainLabels, nodeName, driverName string) (map
labelCount++
}
nodeLabels, err := k8sGetNodeLabels(nodeName)
nodeLabels, err := k8s.GetNodeLabels(nodeName)
if err != nil {
return nil, err
}