/
client.go
120 lines (101 loc) · 3.03 KB
/
client.go
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package client
import (
k8serrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/runtime/serializer"
"k8s.io/client-go/discovery"
memory "k8s.io/client-go/discovery/cached"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/restmapper"
"k8s.io/client-go/scale"
ctrl "sigs.k8s.io/controller-runtime/pkg/client"
)
var scaleConverter = scale.NewScaleConverter()
var codecs = serializer.NewCodecFactory(scaleConverter.Scheme())
type Client struct {
ctrl.Client
kubernetes.Interface
Discovery discovery.DiscoveryInterface
dynamic *dynamic.DynamicClient
scheme *runtime.Scheme
config *rest.Config
rest rest.Interface
mapper *restmapper.DeferredDiscoveryRESTMapper
}
func NewClient(cfg *rest.Config, scheme *runtime.Scheme, cc ctrl.Client) (*Client, error) {
discoveryClient, err := discovery.NewDiscoveryClientForConfig(cfg)
if err != nil {
return nil, err
}
kubeClient, err := kubernetes.NewForConfig(cfg)
if err != nil {
return nil, err
}
restClient, err := newRESTClientForConfig(cfg)
if err != nil {
return nil, err
}
dynClient, err := dynamic.NewForConfig(cfg)
if err != nil {
return nil, err
}
c := Client{
Client: cc,
Interface: kubeClient,
Discovery: discoveryClient,
dynamic: dynClient,
mapper: restmapper.NewDeferredDiscoveryRESTMapper(memory.NewMemCacheClient(discoveryClient)),
scheme: scheme,
config: cfg,
rest: restClient,
}
return &c, nil
}
func newRESTClientForConfig(config *rest.Config) (*rest.RESTClient, error) {
cfg := rest.CopyConfig(config)
// so that the RESTClientFor doesn't complain
cfg.GroupVersion = &schema.GroupVersion{}
cfg.NegotiatedSerializer = codecs.WithoutConversion()
if len(cfg.UserAgent) == 0 {
cfg.UserAgent = rest.DefaultKubernetesUserAgent()
}
return rest.RESTClientFor(cfg)
}
// IsOpenShift returns true if we are connected to a OpenShift cluster.
func (c *Client) IsOpenShift() (bool, error) {
if c.Discovery == nil {
return false, nil
}
return IsOpenShift(c.Discovery)
}
func (c *Client) Dynamic(namespace string, obj *unstructured.Unstructured) (dynamic.ResourceInterface, error) {
mapping, err := c.mapper.RESTMapping(obj.GroupVersionKind().GroupKind(), obj.GroupVersionKind().Version)
if err != nil {
return nil, err
}
var dr dynamic.ResourceInterface
if mapping.Scope.Name() == meta.RESTScopeNameNamespace {
dr = &NamespacedResource{
ResourceInterface: c.dynamic.Resource(mapping.Resource).Namespace(namespace),
}
} else {
dr = &ClusteredResource{
ResourceInterface: c.dynamic.Resource(mapping.Resource),
}
}
return dr, nil
}
func IsOpenShift(d discovery.DiscoveryInterface) (bool, error) {
_, err := d.ServerResourcesForGroupVersion("route.openshift.io/v1")
if err != nil && k8serrors.IsNotFound(err) {
return false, nil
} else if err != nil {
return false, err
}
return true, nil
}