/*
Copyright 2017 The Kubernetes Authors.

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.
*/

// This file is used to deploy the CSI hostPath plugin
// More Information: https://github.com/kubernetes-csi/drivers/tree/master/pkg/hostpath

package storage

import (
	"k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

	clientset "k8s.io/client-go/kubernetes"
	"k8s.io/kubernetes/test/e2e/framework"
)

const (
	csiHostPathPluginImage string = "docker.io/k8scsi/hostpathplugin:0.1"
)

func csiHostPathPod(
	client clientset.Interface,
	config framework.VolumeTestConfig,
	teardown bool,
	f *framework.Framework,
	sa *v1.ServiceAccount,
) *v1.Pod {
	podClient := client.CoreV1().Pods(config.Namespace)

	priv := true
	mountPropagation := v1.MountPropagationBidirectional
	hostPathType := v1.HostPathDirectoryOrCreate
	pod := &v1.Pod{
		ObjectMeta: metav1.ObjectMeta{
			Name:      config.Prefix + "-pod",
			Namespace: config.Namespace,
			Labels: map[string]string{
				"app": "hostpath-driver",
			},
		},
		Spec: v1.PodSpec{
			ServiceAccountName: sa.GetName(),
			NodeName:           config.ServerNodeName,
			RestartPolicy:      v1.RestartPolicyNever,
			Containers: []v1.Container{
				{
					Name:            "external-provisioner",
					Image:           csiExternalProvisionerImage,
					ImagePullPolicy: v1.PullAlways,
					Args: []string{
						"--v=5",
						"--provisioner=csi-hostpath",
						"--csi-address=/csi/csi.sock",
					},
					VolumeMounts: []v1.VolumeMount{
						{
							Name:      "socket-dir",
							MountPath: "/csi",
						},
					},
				},
				{
					Name:            "driver-registrar",
					Image:           csiDriverRegistrarImage,
					ImagePullPolicy: v1.PullAlways,
					Args: []string{
						"--v=5",
						"--csi-address=/csi/csi.sock",
					},
					Env: []v1.EnvVar{
						{
							Name: "KUBE_NODE_NAME",
							ValueFrom: &v1.EnvVarSource{
								FieldRef: &v1.ObjectFieldSelector{
									FieldPath: "spec.nodeName",
								},
							},
						},
					},
					VolumeMounts: []v1.VolumeMount{
						{
							Name:      "socket-dir",
							MountPath: "/csi",
						},
					},
				},
				{
					Name:            "external-attacher",
					Image:           csiExternalAttacherImage,
					ImagePullPolicy: v1.PullAlways,
					Args: []string{
						"--v=5",
						"--csi-address=$(ADDRESS)",
					},
					Env: []v1.EnvVar{
						{
							Name:  "ADDRESS",
							Value: "/csi/csi.sock",
						},
					},
					VolumeMounts: []v1.VolumeMount{
						{
							Name:      "socket-dir",
							MountPath: "/csi",
						},
					},
				},
				{
					Name:            "hostpath-driver",
					Image:           csiHostPathPluginImage,
					ImagePullPolicy: v1.PullAlways,
					SecurityContext: &v1.SecurityContext{
						Privileged: &priv,
					},
					Args: []string{
						"--v=5",
						"--endpoint=$(CSI_ENDPOINT)",
						"--nodeid=$(KUBE_NODE_NAME)",
					},
					Env: []v1.EnvVar{
						{
							Name:  "CSI_ENDPOINT",
							Value: "unix://" + "/csi/csi.sock",
						},
						{
							Name: "KUBE_NODE_NAME",
							ValueFrom: &v1.EnvVarSource{
								FieldRef: &v1.ObjectFieldSelector{
									FieldPath: "spec.nodeName",
								},
							},
						},
					},
					VolumeMounts: []v1.VolumeMount{
						{
							Name:      "socket-dir",
							MountPath: "/csi",
						},
						{
							Name:             "mountpoint-dir",
							MountPath:        "/var/lib/kubelet/pods",
							MountPropagation: &mountPropagation,
						},
					},
				},
			},
			Volumes: []v1.Volume{
				{
					Name: "socket-dir",
					VolumeSource: v1.VolumeSource{
						HostPath: &v1.HostPathVolumeSource{
							Path: "/var/lib/kubelet/plugins/csi-hostpath",
							Type: &hostPathType,
						},
					},
				},
				{
					Name: "mountpoint-dir",
					VolumeSource: v1.VolumeSource{
						HostPath: &v1.HostPathVolumeSource{
							Path: "/var/lib/kubelet/pods",
							Type: &hostPathType,
						},
					},
				},
			},
		},
	}

	err := framework.DeletePodWithWait(f, client, pod)
	framework.ExpectNoError(err, "Failed to delete pod %s/%s: %v",
		pod.GetNamespace(), pod.GetName(), err)

	if teardown {
		return nil
	}

	ret, err := podClient.Create(pod)
	if err != nil {
		framework.ExpectNoError(err, "Failed to create %q pod: %v", pod.GetName(), err)
	}

	// Wait for pod to come up
	framework.ExpectNoError(framework.WaitForPodRunningInNamespace(client, ret))
	return ret
}