/
client.go
146 lines (121 loc) · 3.19 KB
/
client.go
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package k8s
import (
"flag"
"fmt"
"path/filepath"
"time"
monitoringclient "github.com/prometheus-operator/prometheus-operator/pkg/client/versioned"
apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/util/homedir"
aggregatorv1 "k8s.io/kube-aggregator/pkg/client/clientset_generated/clientset"
)
const defaultK8sTimeout = 10 * time.Second
var k8sClient *Client
type Client struct {
client *kubernetes.Clientset
mclient monitoringclient.Interface
apiextv1client apiextensionsv1.Interface
aggrev1client aggregatorv1.Interface
restconfig *rest.Config
}
func getClusterConfig() (*rest.Config, error) {
// creates the in-cluster config
config, err1 := rest.InClusterConfig()
if err1 == nil {
return config, nil
}
// creates the out-of-cluster config
var kubeconfig *string
if home := homedir.HomeDir(); home != "" {
kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
} else {
kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
}
flag.Parse()
// use the current context in kubeconfig
config, err2 := clientcmd.BuildConfigFromFlags("", *kubeconfig)
if err2 != nil {
return nil, fmt.Errorf("in cluster error: %s, out of cluster error: %s", err1.Error(), err2.Error())
}
return config, nil
}
func NewClient() (*Client, error) {
if k8sClient != nil {
return k8sClient, nil
}
cfg, err := getClusterConfig()
if err != nil {
return nil, err
}
clientset, err := kubernetes.NewForConfig(cfg)
if err != nil {
return nil, err
}
mclient, err := monitoringclient.NewForConfig(cfg)
if err != nil {
return nil, err
}
apiextv1client, err := apiextensionsv1.NewForConfig(cfg)
if err != nil {
return nil, err
}
aggrev1client, err := aggregatorv1.NewForConfig(cfg)
if err != nil {
return nil, err
}
k8sClient = &Client{client: clientset, mclient: mclient, apiextv1client: apiextv1client, aggrev1client: aggrev1client, restconfig: cfg}
return k8sClient, nil
}
func GetClient() (*Client, error) {
if k8sClient == nil {
return NewClient()
}
return k8sClient, nil
}
func (c *Client) GetK8sClientset() *kubernetes.Clientset {
return c.client
}
func (c *Client) RawRequest() *rawRequest {
return newRawRequest(c)
}
func (c *Client) ResourceRequest(gv schema.GroupVersion, resource, verb string, args map[string]interface{}) (string, error) {
var result string
var err error
switch verb {
case "get":
result, err = c.ResourceGet(gv, resource, args)
if err != nil {
break
}
case "list":
result, err = c.ResourceList(gv, resource, args)
if err != nil {
break
}
case "delete":
err = c.ResourceDelete(gv, resource, args)
if err != nil {
break
}
case "patch":
result, err = c.ResourcePatch(gv, resource, args)
if err != nil {
break
}
case "exec":
result, err = c.ResourceExec(gv, resource, args)
if err != nil {
break
}
default:
err = fmt.Errorf("unknown verb(%s)", verb)
}
if err != nil {
return "", err
}
return result, nil
}