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
194
195
196
197
198
199
200
201
202
203
204
205
|
/*
* Copyright 2020 Intel Corporation, Inc
*
* 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 module
import (
pkgerrors "github.com/pkg/errors"
)
// Cluster contains the parameters needed for a Cluster
type Cluster struct {
MetaData ClusterMeta `json:"metadata"`
Specification ClusterSpec `json:"spec"`
}
type ClusterMeta struct {
ClusterReference string `json:"name"`
Description string `json:"description"`
UserData1 string `json:"userData1"`
UserData2 string `json:"userData2"`
}
type ClusterSpec struct {
ClusterProvider string `json:"cluster-provider"`
ClusterName string `json:"cluster-name"`
LoadBalancerIP string `json:"loadbalancer-ip"`
}
type ClusterKey struct {
Project string `json:"project"`
LogicalCloudName string `json:"logical-cloud-name"`
ClusterReference string `json:"clname"`
}
// ClusterManager is an interface that exposes the connection
// functionality
type ClusterManager interface {
CreateCluster(project, logicalCloud string, c Cluster) (Cluster, error)
GetCluster(project, logicalCloud, name string) (Cluster, error)
GetAllClusters(project, logicalCloud string) ([]Cluster, error)
DeleteCluster(project, logicalCloud, name string) error
UpdateCluster(project, logicalCloud, name string, c Cluster) (Cluster, error)
}
// ClusterClient implements the ClusterManager
// It will also be used to maintain some localized state
type ClusterClient struct {
storeName string
tagMeta string
util Utility
}
// ClusterClient returns an instance of the ClusterClient
// which implements the ClusterManager
func NewClusterClient() *ClusterClient {
service := DBService{}
return &ClusterClient{
storeName: "orchestrator",
tagMeta: "cluster",
util: service,
}
}
// Create entry for the cluster reference resource in the database
func (v *ClusterClient) CreateCluster(project, logicalCloud string, c Cluster) (Cluster, error) {
//Construct key consisting of name
key := ClusterKey{
Project: project,
LogicalCloudName: logicalCloud,
ClusterReference: c.MetaData.ClusterReference,
}
//Check if project exists
err := v.util.CheckProject(project)
if err != nil {
return Cluster{}, pkgerrors.New("Unable to find the project")
}
//check if logical cloud exists
err = v.util.CheckLogicalCloud(project, logicalCloud)
if err != nil {
return Cluster{}, pkgerrors.New("Unable to find the logical cloud")
}
//Check if this Cluster reference already exists
_, err = v.GetCluster(project, logicalCloud, c.MetaData.ClusterReference)
if err == nil {
return Cluster{}, pkgerrors.New("Cluster reference already exists")
}
err = v.util.DBInsert(v.storeName, key, nil, v.tagMeta, c)
if err != nil {
return Cluster{}, pkgerrors.Wrap(err, "Creating DB Entry")
}
return c, nil
}
// Get returns Cluster for corresponding cluster reference
func (v *ClusterClient) GetCluster(project, logicalCloud, clusterReference string)(Cluster, error) {
//Construct the composite key to select the entry
key := ClusterKey{
Project: project,
LogicalCloudName: logicalCloud,
ClusterReference: clusterReference,
}
value, err := v.util.DBFind(v.storeName, key, v.tagMeta)
if err != nil {
return Cluster{}, pkgerrors.Wrap(err, "Get Cluster reference")
}
//value is a byte array
if value != nil {
cl := Cluster{}
err = v.util.DBUnmarshal(value[0], &cl)
if err != nil {
return Cluster{}, pkgerrors.Wrap(err, "Unmarshaling value")
}
return cl, nil
}
return Cluster{}, pkgerrors.New("Error getting Cluster")
}
// GetAll returns all cluster references in the logical cloud
func (v *ClusterClient) GetAllClusters(project, logicalCloud string)([]Cluster, error) {
//Construct the composite key to select clusters
key := ClusterKey{
Project: project,
LogicalCloudName: logicalCloud,
ClusterReference: "",
}
var resp []Cluster
values, err := v.util.DBFind(v.storeName, key, v.tagMeta)
if err != nil {
return []Cluster{}, pkgerrors.Wrap(err, "Get All Cluster references")
}
for _, value := range values {
cl := Cluster{}
err = v.util.DBUnmarshal(value, &cl)
if err != nil {
return []Cluster{}, pkgerrors.Wrap(err, "Unmarshaling values")
}
resp = append(resp, cl)
}
return resp, nil
}
// Delete the Cluster reference entry from database
func (v *ClusterClient) DeleteCluster(project, logicalCloud, clusterReference string) error {
//Construct the composite key to select the entry
key := ClusterKey{
Project: project,
LogicalCloudName: logicalCloud,
ClusterReference: clusterReference,
}
err := v.util.DBRemove(v.storeName, key)
if err != nil {
return pkgerrors.Wrap(err, "Delete Cluster Reference")
}
return nil
}
// Update an entry for the Cluster reference in the database
func (v *ClusterClient) UpdateCluster(project, logicalCloud, clusterReference string, c Cluster) (Cluster, error) {
key := ClusterKey{
Project: project,
LogicalCloudName: logicalCloud,
ClusterReference: clusterReference,
}
//Check for name mismatch in cluster reference
if c.MetaData.ClusterReference != clusterReference {
return Cluster{}, pkgerrors.New("Update Error - Cluster reference mismatch")
}
//Check if this Cluster reference exists
_, err := v.GetCluster(project, logicalCloud, clusterReference)
if err != nil {
return Cluster{}, pkgerrors.New("Update Error - Cluster reference doesn't exist")
}
err = v.util.DBInsert(v.storeName, key, nil, v.tagMeta, c)
if err != nil {
return Cluster{}, pkgerrors.Wrap(err, "Updating DB Entry")
}
return c, nil
}
|
