image.go

/*
Copyright 2016 The Kubernetes Authors All rights reserved.

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 e2e_node

import (
	"errors"
	"fmt"
	"time"

	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
	"k8s.io/kubernetes/pkg/kubelet/dockertools"
	kubepod "k8s.io/kubernetes/pkg/kubelet/pod"
)

type ConformanceImage struct {
	Image   kubecontainer.ImageSpec
	Runtime kubecontainer.Runtime
}

func NewConformanceImage(containerRuntime string, image string) (ci ConformanceImage, err error) {
	ci.Image = kubecontainer.ImageSpec{Image: image}
	if containerRuntime == "docker" {
		ci.Runtime = dockerRuntime()
		return ci, nil
	}
	return ci, fmt.Errorf("Unsupported runtime : %s.", containerRuntime)
}

func dockerRuntime() kubecontainer.Runtime {
	dockerClient := dockertools.ConnectToDockerOrDie("")
	pm := kubepod.NewBasicPodManager(nil)
	dm := dockertools.NewDockerManager(
		dockerClient,
		nil, nil, nil, pm, nil,
		"", 0, 0, "",
		nil, nil, nil, nil, nil, nil, nil,
		false, nil, true, false, false,
	)

	return dm
}

func (ci *ConformanceImage) Pull() error {
	err := ci.Runtime.PullImage(ci.Image, nil)
	if err != nil {
		return err
	}

	if present, err := ci.Runtime.IsImagePresent(ci.Image); err != nil {
		return err
	} else if present == false {
		return errors.New("Failed to detect the pulled image.")
	}

	return nil
}

func (ci *ConformanceImage) List() error {
	images, err := ci.Runtime.ListImage(ci.Image, nil)
	if err != nil {
		return err
	} else {
		fmt.Println(images)
		return nil
	}
}

func (ci *ConformanceImage) Remove() error {
	ci.Runtime.GarbageCollect(kubecontainer.ContainerGCPolicy{time.Second * 30, 1, 0})

	var err error
	for start := time.Now(); time.Since(start) < time.Minute*2; time.Sleep(time.Second * 30) {
		if err = ci.Runtime.RemoveImage(ci.Image); err == nil {
			break
		}
	}
	if err != nil {
		return err
	}

	if present, err := ci.Runtime.IsImagePresent(ci.Image); err != nil {
		return err
	} else if present == true {
		return errors.New("Failed to remove the pulled image.")
	}

	return nil
}