blob: 315e823feeec2da10f1578c50cbf51e2676e3860 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
// SPDX-License-Identifier: GPL-3.0-or-later
package k8s_state
import (
"errors"
"os"
"path/filepath"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
"github.com/mattn/go-isatty"
)
const (
envKubeServiceHost = "KUBERNETES_SERVICE_HOST"
envKubeServicePort = "KUBERNETES_SERVICE_PORT"
)
func newKubeClient() (kubernetes.Interface, error) {
if os.Getenv(envKubeServiceHost) != "" && os.Getenv(envKubeServicePort) != "" {
return newKubeClientInCluster()
}
if isatty.IsTerminal(os.Stdout.Fd()) {
return newKubeClientOutOfCluster()
}
return nil, errors.New("can not create Kubernetes client: not inside a cluster")
}
func newKubeClientInCluster() (*kubernetes.Clientset, error) {
config, err := rest.InClusterConfig()
if err != nil {
return nil, err
}
config.UserAgent = "Netdata/kube-state"
return kubernetes.NewForConfig(config)
}
func newKubeClientOutOfCluster() (*kubernetes.Clientset, error) {
home := homeDir()
if home == "" {
return nil, errors.New("couldn't find home directory")
}
configPath := filepath.Join(home, ".kube", "config")
config, err := clientcmd.BuildConfigFromFlags("", configPath)
if err != nil {
return nil, err
}
config.UserAgent = "Netdata/kube-state"
return kubernetes.NewForConfig(config)
}
func homeDir() string {
if h := os.Getenv("HOME"); h != "" {
return h
}
return os.Getenv("USERPROFILE") // windows
}
|