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package context
import (
"os"
"github.com/docker/cli/cli/context"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
)
// FromKubeConfig creates a Kubernetes endpoint from a Kubeconfig file
func FromKubeConfig(kubeconfig, kubeContext, namespaceOverride string) (Endpoint, error) {
cfg := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
&clientcmd.ClientConfigLoadingRules{ExplicitPath: kubeconfig},
&clientcmd.ConfigOverrides{CurrentContext: kubeContext, Context: clientcmdapi.Context{Namespace: namespaceOverride}})
ns, _, err := cfg.Namespace()
if err != nil {
return Endpoint{}, err
}
clientcfg, err := cfg.ClientConfig()
if err != nil {
return Endpoint{}, err
}
var proxyURLString string
if clientcfg.Proxy != nil {
proxyURL, err := clientcfg.Proxy(nil)
if err != nil {
return Endpoint{}, err
}
proxyURLString = proxyURL.String()
}
var ca, key, cert []byte
if ca, err = readFileOrDefault(clientcfg.CAFile, clientcfg.CAData); err != nil {
return Endpoint{}, err
}
if key, err = readFileOrDefault(clientcfg.KeyFile, clientcfg.KeyData); err != nil {
return Endpoint{}, err
}
if cert, err = readFileOrDefault(clientcfg.CertFile, clientcfg.CertData); err != nil {
return Endpoint{}, err
}
var tlsData *context.TLSData
if ca != nil || cert != nil || key != nil {
tlsData = &context.TLSData{
CA: ca,
Cert: cert,
Key: key,
}
}
var usernamePassword *UsernamePassword
if clientcfg.Username != "" || clientcfg.Password != "" {
usernamePassword = &UsernamePassword{
Username: clientcfg.Username,
Password: clientcfg.Password,
}
}
return Endpoint{
EndpointMeta: EndpointMeta{
EndpointMetaBase: context.EndpointMetaBase{
Host: clientcfg.Host,
SkipTLSVerify: clientcfg.Insecure,
},
DefaultNamespace: ns,
ProxyURL: proxyURLString,
AuthProvider: clientcfg.AuthProvider,
Exec: clientcfg.ExecProvider,
UsernamePassword: usernamePassword,
Token: clientcfg.BearerToken,
},
TLSData: tlsData,
}, nil
}
func readFileOrDefault(path string, defaultValue []byte) ([]byte, error) {
if path != "" {
return os.ReadFile(path)
}
return defaultValue, nil
}
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