mirror of https://github.com/kubernetes/kops.git
91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
/*
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Copyright 2019 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 kutil
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"os"
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"os/exec"
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"strings"
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"k8s.io/klog/v2"
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"k8s.io/kops/pkg/kubeconfig"
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)
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type Kubectl struct {
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KubectlPath string
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}
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func (k *Kubectl) GetConfig(minify bool) (*kubeconfig.KubectlConfig, error) {
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output := "json"
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// TODO: --context doesn't seem to work
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args := []string{"config", "view"}
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if minify {
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args = append(args, "--minify")
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}
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if output != "" {
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args = append(args, "--output", output)
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}
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configString, _, err := k.execKubectl(args...)
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if err != nil {
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return nil, err
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}
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configString = strings.TrimSpace(configString)
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klog.V(8).Infof("config = %q", configString)
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config := &kubeconfig.KubectlConfig{}
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err = json.Unmarshal([]byte(configString), config)
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if err != nil {
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return nil, fmt.Errorf("cannot parse current config from kubectl: %v", err)
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}
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return config, nil
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}
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func (k *Kubectl) execKubectl(args ...string) (string, string, error) {
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kubectlPath := k.KubectlPath
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if kubectlPath == "" {
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kubectlPath = "kubectl" // Assume in PATH
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}
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cmd := exec.Command(kubectlPath, args...)
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env := os.Environ()
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cmd.Env = env
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var stdout bytes.Buffer
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cmd.Stdout = &stdout
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var stderr bytes.Buffer
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cmd.Stderr = &stderr
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human := strings.Join(cmd.Args, " ")
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klog.V(2).Infof("Running command: %s", human)
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err := cmd.Run()
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if err != nil {
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klog.Infof("error running %s", human)
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klog.Info(stdout.String())
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klog.Info(stderr.String())
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return stdout.String(), stderr.String(), fmt.Errorf("error running kubectl: %v", err)
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}
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return stdout.String(), stderr.String(), err
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}
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