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client.go
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client.go
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package helpers
import (
"os"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
configv1 "github.com/openshift/api/config/v1"
"github.com/openshift/library-go/pkg/config/client"
)
// TODO this file needs to collapse with pkg/config/client. We cannot safely delegate from this file because this one
// TODO uses JSON and other uses protobuf.
// GetKubeClientConfig loads in-cluster config if kubeConfigFile is empty or the file if not, then applies overrides.
func GetKubeClientConfig(kubeClientConnection configv1.KubeClientConfig) (*rest.Config, error) {
return GetKubeConfigOrInClusterConfig(kubeClientConnection.KubeConfig, kubeClientConnection.ConnectionOverrides)
}
// GetKubeConfigOrInClusterConfig loads in-cluster config if kubeConfigFile is empty or the file if not,
// then applies overrides.
func GetKubeConfigOrInClusterConfig(kubeConfigFile string, overrides configv1.ClientConnectionOverrides) (*rest.Config, error) {
if len(kubeConfigFile) > 0 {
return GetClientConfig(kubeConfigFile, overrides)
}
clientConfig, err := rest.InClusterConfig()
if err != nil {
return nil, err
}
applyClientConnectionOverrides(overrides, clientConfig)
clientConfig.WrapTransport = client.ClientTransportOverrides{WrapTransport: clientConfig.WrapTransport}.DefaultClientTransport
return clientConfig, nil
}
func GetClientConfig(kubeConfigFile string, overrides configv1.ClientConnectionOverrides) (*rest.Config, error) {
kubeConfigBytes, err := os.ReadFile(kubeConfigFile)
if err != nil {
return nil, err
}
kubeConfig, err := clientcmd.NewClientConfigFromBytes(kubeConfigBytes)
if err != nil {
return nil, err
}
clientConfig, err := kubeConfig.ClientConfig()
if err != nil {
return nil, err
}
applyClientConnectionOverrides(overrides, clientConfig)
clientConfig.WrapTransport = client.ClientTransportOverrides{WrapTransport: clientConfig.WrapTransport}.DefaultClientTransport
return clientConfig, nil
}
// applyClientConnectionOverrides updates a kubeConfig with the overrides from the config.
func applyClientConnectionOverrides(overrides configv1.ClientConnectionOverrides, kubeConfig *rest.Config) {
if overrides.QPS != 0 {
kubeConfig.QPS = overrides.QPS
}
if overrides.Burst != 0 {
kubeConfig.Burst = int(overrides.Burst)
}
if len(overrides.AcceptContentTypes) != 0 {
kubeConfig.ContentConfig.AcceptContentTypes = overrides.AcceptContentTypes
}
if len(overrides.ContentType) != 0 {
kubeConfig.ContentConfig.ContentType = overrides.ContentType
}
}