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clients.go
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clients.go
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package kube
import (
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"os"
"strings"
"github.com/jenkins-x/jx-kube-client/v3/pkg/kubeclient"
"github.com/pkg/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/dynamic"
fakedyn "k8s.io/client-go/dynamic/fake"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/fake"
"k8s.io/client-go/rest"
)
// LazyCreateDynamicClient lazily creates the dynamic client if its not defined
func LazyCreateDynamicClient(client dynamic.Interface) (dynamic.Interface, error) {
if client != nil {
return client, nil
}
if IsNoKubernetes() {
scheme := runtime.NewScheme()
return fakedyn.NewSimpleDynamicClient(scheme), nil
}
f := kubeclient.NewFactory()
cfg, err := f.CreateKubeConfig()
if err != nil {
return nil, errors.Wrap(err, "failed to get kubernetes config")
}
client, err = dynamic.NewForConfig(cfg)
if err != nil {
return nil, errors.Wrap(err, "error building dynamic clientset")
}
return client, nil
}
// LazyCreateKubeClient lazy creates the kube client if its not defined
func LazyCreateKubeClient(client kubernetes.Interface) (kubernetes.Interface, error) {
return LazyCreateKubeClientWithMandatory(client, false)
}
// LazyCreateKubeClientWithMandatory if mandatory is specified then the env vars are ignored to determine if we use
// kubernetes or not
func LazyCreateKubeClientWithMandatory(client kubernetes.Interface, mandatory bool) (kubernetes.Interface, error) {
if client != nil {
return client, nil
}
if !mandatory && IsNoKubernetes() {
return NewFakeKubernetesClient("default"), nil
}
f := kubeclient.NewFactory()
cfg, err := f.CreateKubeConfig()
if err != nil {
return client, errors.Wrap(err, "failed to get kubernetes config")
}
client, err = kubernetes.NewForConfig(cfg)
if err != nil {
return client, errors.Wrap(err, "error building kubernetes clientset")
}
return client, nil
}
// LazyCreateKubeClientAndNamespace lazy creates the kube client and/or the current namespace if not already defined
func LazyCreateKubeClientAndNamespace(client kubernetes.Interface, ns string) (kubernetes.Interface, string, error) {
if client != nil && ns != "" {
return client, ns, nil
}
if IsNoKubernetes() {
if ns == "" {
ns = "default"
}
if client == nil {
client = NewFakeKubernetesClient(ns)
}
return client, ns, nil
}
if client == nil {
f := kubeclient.NewFactory()
cfg, err := f.CreateKubeConfig()
if err != nil {
return client, ns, errors.Wrap(err, "failed to get kubernetes config")
}
client, err = kubernetes.NewForConfig(cfg)
if err != nil {
return client, ns, errors.Wrap(err, "error building kubernetes clientset")
}
}
if ns == "" {
var err error
ns, err = kubeclient.CurrentNamespace()
if err != nil {
return client, ns, errors.Wrap(err, "failed to get current kubernetes namespace")
}
}
return client, ns, nil
}
// IsInCluster tells if we are running incluster
func IsInCluster() bool {
_, err := rest.InClusterConfig()
return err == nil
}
// IsNoKubernetes returns true if we are inside a GitHub Action or not using kubernetes
func IsNoKubernetes() bool {
// disable k8s by default if inside a github action
if strings.ToLower(os.Getenv("GITHUB_ACTIONS")) == "true" {
return strings.ToLower(os.Getenv("JX_KUBERNETES")) != "true"
}
return strings.ToLower(os.Getenv("JX_NO_KUBERNETES")) == "true"
}
// NewFakeKubernetesClient creates a fake k8s client if we have disabled kubernetes
func NewFakeKubernetesClient(ns string) *fake.Clientset {
return fake.NewSimpleClientset(&corev1.Namespace{
ObjectMeta: metav1.ObjectMeta{
Name: ns,
},
})
}