summaryrefslogtreecommitdiffstats
path: root/src/k8splugin/csar/parser.go
blob: 6cb07fc2346bb5f2420034756f1ac18ca4704b4c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
/*
Copyright 2018 Intel Corporation.
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 csar

import (
	"encoding/hex"
	"io/ioutil"
	"log"
	"math/rand"
	"os"

	"k8s.io/client-go/kubernetes"

	pkgerrors "github.com/pkg/errors"
	"gopkg.in/yaml.v2"

	"k8splugin/krd"
)

func generateExternalVNFID() string {
	b := make([]byte, 2)
	rand.Read(b)
	return hex.EncodeToString(b)
}

func ensuresNamespace(namespace string, kubeclient kubernetes.Interface) error {
	namespacePlugin, ok := krd.LoadedPlugins["namespace"]
	if !ok {
		return pkgerrors.New("No plugin for namespace resource found")
	}

	symGetNamespaceFunc, err := namespacePlugin.Lookup("Get")
	if err != nil {
		return pkgerrors.Wrap(err, "Error fetching get namespace function")
	}

	ns, err := symGetNamespaceFunc.(func(string, string, kubernetes.Interface) (string, error))(
		namespace, "", kubeclient)
	if err != nil {
		return pkgerrors.Wrap(err, "An error ocurred during the get namespace execution")
	}

	if ns == "" {
		log.Println("Creating " + namespace + " namespace")
		symGetNamespaceFunc, err := namespacePlugin.Lookup("Create")
		if err != nil {
			return pkgerrors.Wrap(err, "Error fetching create namespace plugin")
		}

		err = symGetNamespaceFunc.(func(string, kubernetes.Interface) error)(
			namespace, kubeclient)
		if err != nil {
			return pkgerrors.Wrap(err, "Error creating "+namespace+" namespace")
		}
	}
	return nil
}

// CreateVNF reads the CSAR files from the files system and creates them one by one
var CreateVNF = func(csarID string, cloudRegionID string, namespace string, kubeclient *kubernetes.Clientset) (string, map[string][]string, error) {
	if err := ensuresNamespace(namespace, kubeclient); err != nil {
		return "", nil, pkgerrors.Wrap(err, "Error while ensuring namespace: "+namespace)
	}
	externalVNFID := generateExternalVNFID()
	internalVNFID := cloudRegionID + "-" + namespace + "-" + externalVNFID

	csarDirPath := os.Getenv("CSAR_DIR") + "/" + csarID
	metadataYAMLPath := csarDirPath + "/metadata.yaml"

	log.Println("Reading " + metadataYAMLPath + " file")
	metadataFile, err := ReadMetadataFile(metadataYAMLPath)
	if err != nil {
		return "", nil, pkgerrors.Wrap(err, "Error while reading Metadata File: "+metadataYAMLPath)
	}

	var path string
	resourceYAMLNameMap := make(map[string][]string)
	// Iterates over the resources defined in the metadata file to create kubernetes resources
	log.Println(string(len(metadataFile.ResourceTypePathMap)) + " resource(s) type(s) to be processed")
	for resource, fileNames := range metadataFile.ResourceTypePathMap {
		log.Println("Processing items of " + string(resource) + " resource")
		var resourcesCreated []string
		for _, filename := range fileNames {
			path = csarDirPath + "/" + filename

			if _, err := os.Stat(path); os.IsNotExist(err) {
				return "", nil, pkgerrors.New("File " + path + "does not exists")
			}
			log.Println("Processing file: " + path)

			genericKubeData := &krd.ResourceData{
				YamlFilePath: path,
				Namespace:    namespace,
				VnfId:        internalVNFID,
			}

			typePlugin, ok := krd.LoadedPlugins[resource]
			if !ok {
				return "", nil, pkgerrors.New("No plugin for resource " + resource + " found")
			}

			symCreateResourceFunc, err := typePlugin.Lookup("Create")
			if err != nil {
				return "", nil, pkgerrors.Wrap(err, "Error fetching "+resource+" plugin")
			}

			internalResourceName, err := symCreateResourceFunc.(func(*krd.ResourceData, kubernetes.Interface) (string, error))(
				genericKubeData, kubeclient)
			if err != nil {
				return "", nil, pkgerrors.Wrap(err, "Error in plugin "+resource+" plugin")
			}
			log.Print(internalResourceName + " succesful resource created")
			resourcesCreated = append(resourcesCreated, internalResourceName)
		}
		resourceYAMLNameMap[resource] = resourcesCreated
	}

	return externalVNFID, resourceYAMLNameMap, nil
}

// DestroyVNF deletes VNFs based on data passed
var DestroyVNF = func(data map[string][]string, namespace string, kubeclient *kubernetes.Clientset) error {
	/* data:
	{
		"deployment": ["cloud1-default-uuid-sisedeploy1", "cloud1-default-uuid-sisedeploy2", ... ]
		"service": ["cloud1-default-uuid-sisesvc1", "cloud1-default-uuid-sisesvc2", ... ]
	},
	*/

	for resourceName, resourceList := range data {
		typePlugin, ok := krd.LoadedPlugins[resourceName]
		if !ok {
			return pkgerrors.New("No plugin for resource " + resourceName + " found")
		}

		symDeleteResourceFunc, err := typePlugin.Lookup("Delete")
		if err != nil {
			return pkgerrors.Wrap(err, "Error fetching "+resourceName+" plugin")
		}

		for _, resourceName := range resourceList {

			log.Println("Deleting resource: " + resourceName)

			err = symDeleteResourceFunc.(func(string, string, kubernetes.Interface) error)(
				resourceName, namespace, kubeclient)
			if err != nil {
				return pkgerrors.Wrap(err, "Error destroying "+resourceName)
			}
		}
	}

	return nil
}

// MetadataFile stores the metadata of execution
type MetadataFile struct {
	ResourceTypePathMap map[string][]string `yaml:"resources"`
}

// ReadMetadataFile reads the metadata yaml to return the order or reads
var ReadMetadataFile = func(path string) (MetadataFile, error) {
	var metadataFile MetadataFile

	if _, err := os.Stat(path); os.IsNotExist(err) {
		return metadataFile, pkgerrors.Wrap(err, "Metadata YAML file does not exist")
	}

	log.Println("Reading metadata YAML: " + path)
	yamlFile, err := ioutil.ReadFile(path)
	if err != nil {
		return metadataFile, pkgerrors.Wrap(err, "Metadata YAML file read error")
	}

	err = yaml.Unmarshal(yamlFile, &metadataFile)
	if err != nil {
		return metadataFile, pkgerrors.Wrap(err, "Metadata YAML file unmarshal error")
	}
	log.Printf("metadata:\n%v", metadataFile)

	return metadataFile, nil
}