copy.go

/*
   Copyright 2018 Cedric Kring

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

package kubernetes

import (
	"os"
	"path/filepath"

	"github.com/pkg/errors"
	"k8s.io/client-go/kubernetes"
)

//Copy contains all required information to copy a file into a pod
type Copy struct {
	Namespace string
	PodName   string
	Container string
	SrcPath   string
	DestPath  string
}

//CopyFileIntoPod copies the src .tar.gz into the specified container
func (c Copy) CopyFileIntoPod(client *kubernetes.Clientset) error {
	if filepath.Ext(c.SrcPath) != ".gz" {
		return errors.New("SrcPath must end with .gz")
	}

	f, err := os.Open(c.SrcPath)
	if err != nil {
		return errors.Wrap(err, "opening tar file")
	}
	defer f.Close()

	tarCmd := []string{"tar", "-zxf", "-", "-C", c.DestPath}

	exec := Exec{
		Namespace: c.Namespace,
		PodName:   c.PodName,
		Container: c.Container,

		Command: tarCmd,
		Stdin:   f,
	}

	return exec.Exec(client)
}