82 lines
2.3 KiB
Go
82 lines
2.3 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package discovery
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import (
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"fmt"
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"io/ioutil"
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"net/http"
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kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
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kubenode "k8s.io/kubernetes/cmd/kubeadm/app/node"
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kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
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"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
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clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
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)
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// For identifies and executes the desired discovery mechanism.
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func For(d kubeadmapi.Discovery) (*clientcmdapi.Config, error) {
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switch {
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case d.File != nil:
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return runFileDiscovery(d.File)
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case d.HTTPS != nil:
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return runHTTPSDiscovery(d.HTTPS)
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case d.Token != nil:
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return runTokenDiscovery(d.Token)
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default:
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return nil, fmt.Errorf("couldn't find a valid discovery configuration.")
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}
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}
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// runFileDiscovery executes file-based discovery.
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func runFileDiscovery(fd *kubeadmapi.FileDiscovery) (*clientcmdapi.Config, error) {
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return clientcmd.LoadFromFile(fd.Path)
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}
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// runHTTPSDiscovery executes HTTPS-based discovery.
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func runHTTPSDiscovery(hd *kubeadmapi.HTTPSDiscovery) (*clientcmdapi.Config, error) {
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response, err := http.Get(hd.URL)
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if err != nil {
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return nil, err
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}
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defer response.Body.Close()
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kubeconfig, err := ioutil.ReadAll(response.Body)
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if err != nil {
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return nil, err
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}
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return clientcmd.Load(kubeconfig)
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}
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// runTokenDiscovery executes token-based discovery.
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func runTokenDiscovery(td *kubeadmapi.TokenDiscovery) (*clientcmdapi.Config, error) {
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if valid, err := kubeadmutil.ValidateToken(td); valid == false {
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return nil, err
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}
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clusterInfo, err := kubenode.RetrieveTrustedClusterInfo(td)
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if err != nil {
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return nil, err
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}
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cfg, err := kubenode.EstablishMasterConnection(td, clusterInfo)
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if err != nil {
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return nil, err
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}
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return cfg, nil
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}
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