54 lines
1.7 KiB
Go
54 lines
1.7 KiB
Go
/*
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Copyright 2019 The Jetstack cert-manager contributors.
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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 kube
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import (
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"fmt"
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"github.com/jetstack/cert-manager/pkg/util"
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"k8s.io/client-go/rest"
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"k8s.io/client-go/tools/clientcmd"
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)
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// KubeConfig will return a rest.Config for communicating with the Kubernetes API server.
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// If apiServerHost is specified, a config without authentication that is configured
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// to talk to the apiServerHost URL will be returned. Else, the in-cluster config will be loaded,
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// and failing this, the config will be loaded from the users local kubeconfig directory
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func KubeConfig(apiServerHost string) (*rest.Config, error) {
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var err error
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var cfg *rest.Config
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if len(apiServerHost) > 0 {
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cfg = new(rest.Config)
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cfg.Host = apiServerHost
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} else if cfg, err = rest.InClusterConfig(); err != nil {
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apiCfg, err := clientcmd.NewDefaultClientConfigLoadingRules().Load()
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if err != nil {
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return nil, fmt.Errorf("error loading cluster config: %s", err.Error())
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}
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cfg, err = clientcmd.NewDefaultClientConfig(*apiCfg, &clientcmd.ConfigOverrides{}).ClientConfig()
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if err != nil {
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return nil, fmt.Errorf("error loading cluster client config: %s", err.Error())
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}
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}
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cfg.UserAgent = util.CertManagerUserAgent
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return cfg, nil
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}
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