forked from gardener-attic/gardener-extensions
/
terraform.go
263 lines (236 loc) · 9.79 KB
/
terraform.go
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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
// Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 infrastructure
import (
"fmt"
"path/filepath"
azurev1alpha1 "github.com/gardener/gardener-extensions/controllers/provider-azure/pkg/apis/azure/v1alpha1"
"github.com/gardener/gardener-extensions/controllers/provider-azure/pkg/internal"
"github.com/gardener/gardener-extensions/pkg/controller"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/apis/garden/v1beta1"
"github.com/gardener/gardener/pkg/chartrenderer"
"github.com/gardener/gardener/pkg/operation/terraformer"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
// TerraformerPurpose is the terraformer infrastructure purpose.
TerraformerPurpose = "infra"
// TerraformerOutputKeyResourceGroupName is the key for the resourceGroupName output
TerraformerOutputKeyResourceGroupName = "resourceGroupName"
// TerraformerOutputKeyVNetName is the key for the vnetName output
TerraformerOutputKeyVNetName = "vnetName"
// TerraformerOutputKeySubnetName is the key for the subnetName output
TerraformerOutputKeySubnetName = "subnetName"
// TerraformerOutputKeyAvailabilitySetID is the key for the availabilitySetID output
TerraformerOutputKeyAvailabilitySetID = "availabilitySetID"
// TerraformerOutputKeyAvailabilitySetName is the key for the availabilitySetName output
TerraformerOutputKeyAvailabilitySetName = "availabilitySetName"
// TerraformerOutputKeyRouteTableName is the key for the routeTableName output
TerraformerOutputKeyRouteTableName = "routeTableName"
// TerraformerOutputKeySecurityGroupName is the key for the securityGroupName output
TerraformerOutputKeySecurityGroupName = "securityGroupName"
)
var (
// ChartsPath is the path to the charts
ChartsPath = filepath.Join("controllers", "provider-azure", "charts")
// InternalChartsPath is the path to the internal charts
InternalChartsPath = filepath.Join(ChartsPath, "internal")
// StatusTypeMeta is the TypeMeta of the Azure InfrastructureStatus
StatusTypeMeta = metav1.TypeMeta{
APIVersion: azurev1alpha1.SchemeGroupVersion.String(),
Kind: "InfrastructureStatus",
}
)
// ComputeTerraformerChartValues computes the values for the Azure Terraformer chart.
func ComputeTerraformerChartValues(infra *extensionsv1alpha1.Infrastructure, clientAuth *internal.ClientAuth,
config *azurev1alpha1.InfrastructureConfig, cluster *controller.Cluster) (map[string]interface{}, error) {
var (
createResourceGroup = true
createVNet = true
resourceGroupName = infra.Namespace
vnetName = infra.Namespace
vnetCIDR = config.Networks.Workers
findDomainCountByRegion = func(region string, domainCounts []v1beta1.AzureDomainCount) (v1beta1.AzureDomainCount, error) {
for _, domainCount := range domainCounts {
if domainCount.Region == region {
return domainCount, nil
}
}
return v1beta1.AzureDomainCount{}, fmt.Errorf("could not find a domain count for region %s", region)
}
)
// check if we should use an existing ResourceGroup or create a new one
if config.ResourceGroup != nil {
createResourceGroup = false
resourceGroupName = config.ResourceGroup.Name
}
// check if we should use an existing ResourceGroup or create a new one
if config.Networks.VNet.Name != nil {
createVNet = false
vnetName = *config.Networks.VNet.Name
}
if config.Networks.VNet.CIDR != nil {
vnetCIDR = *config.Networks.VNet.CIDR
}
var countUpdateDomainsCount, countFaultDomainsCount int
if cluster.CloudProfile.Spec.Azure != nil {
countUpdateDomains, err := findDomainCountByRegion(infra.Spec.Region, cluster.CloudProfile.Spec.Azure.CountUpdateDomains)
if err != nil {
return nil, err
}
countUpdateDomainsCount = countUpdateDomains.Count
countFaultDomains, err := findDomainCountByRegion(infra.Spec.Region, cluster.CloudProfile.Spec.Azure.CountFaultDomains)
if err != nil {
return nil, err
}
countFaultDomainsCount = countFaultDomains.Count
}
return map[string]interface{}{
"azure": map[string]interface{}{
"subscriptionID": clientAuth.SubscriptionID,
"tenantID": clientAuth.TenantID,
"region": infra.Spec.Region,
"countUpdateDomains": countUpdateDomainsCount,
"countFaultDomains": countFaultDomainsCount,
},
"create": map[string]interface{}{
"resourceGroup": createResourceGroup,
"vnet": createVNet,
},
"resourceGroup": map[string]interface{}{
"name": resourceGroupName,
"vnet": map[string]interface{}{
"name": vnetName,
"cidr": vnetCIDR,
},
},
"clusterName": infra.Namespace,
"networks": map[string]interface{}{
"worker": config.Networks.Workers,
},
"outputKeys": map[string]interface{}{
"resourceGroupName": TerraformerOutputKeyResourceGroupName,
"vnetName": TerraformerOutputKeyVNetName,
"subnetName": TerraformerOutputKeySubnetName,
"availabilitySetID": TerraformerOutputKeyAvailabilitySetID,
"availabilitySetName": TerraformerOutputKeyAvailabilitySetName,
"routeTableName": TerraformerOutputKeyRouteTableName,
"securityGroupName": TerraformerOutputKeySecurityGroupName,
},
}, nil
}
// RenderTerraformerChart renders the azure-infra chart with the given values.
func RenderTerraformerChart(renderer chartrenderer.Interface, infra *extensionsv1alpha1.Infrastructure, clientAuth *internal.ClientAuth,
config *azurev1alpha1.InfrastructureConfig, cluster *controller.Cluster) (*TerraformFiles, error) {
values, err := ComputeTerraformerChartValues(infra, clientAuth, config, cluster)
if err != nil {
return nil, err
}
release, err := renderer.Render(filepath.Join(InternalChartsPath, "azure-infra"), "azure-infra", infra.Namespace, values)
if err != nil {
return nil, err
}
return &TerraformFiles{
Main: release.FileContent("main.tf"),
Variables: release.FileContent("variables.tf"),
TFVars: []byte(release.FileContent("terraform.tfvars")),
}, nil
}
// TerraformFiles are the files that have been rendered from the infrastructure chart.
type TerraformFiles struct {
Main string
Variables string
TFVars []byte
}
// TerraformState is the Terraform state for an infrastructure.
type TerraformState struct {
// VPCName is the name of the VNet created for an infrastructure.
VNetName string
// ResourceGroupName is the name of the resource group.
ResourceGroupName string
// AvailabilitySetID is the ID for the created availability set.
AvailabilitySetID string
// AvailabilitySetName the ID for the created availability set .
AvailabilitySetName string
// SubnetName is the name of the created subnet.
SubnetName string
// RouteTableName is the name of the route table.
RouteTableName string
// SecurityGroupName is the name of the security group.
SecurityGroupName string
}
// ExtractTerraformState extracts the TerraformState from the given Terraformer.
func ExtractTerraformState(tf *terraformer.Terraformer, config *azurev1alpha1.InfrastructureConfig) (*TerraformState, error) {
outputKeys := []string{
TerraformerOutputKeyAvailabilitySetID,
TerraformerOutputKeyAvailabilitySetName,
TerraformerOutputKeyResourceGroupName,
TerraformerOutputKeyRouteTableName,
TerraformerOutputKeySecurityGroupName,
TerraformerOutputKeySubnetName,
TerraformerOutputKeyVNetName,
}
vars, err := tf.GetStateOutputVariables(outputKeys...)
if err != nil {
return nil, err
}
return &TerraformState{
AvailabilitySetID: vars[TerraformerOutputKeyAvailabilitySetID],
AvailabilitySetName: vars[TerraformerOutputKeyAvailabilitySetName],
VNetName: vars[TerraformerOutputKeyVNetName],
ResourceGroupName: vars[TerraformerOutputKeyResourceGroupName],
RouteTableName: vars[TerraformerOutputKeyRouteTableName],
SecurityGroupName: vars[TerraformerOutputKeySecurityGroupName],
SubnetName: vars[TerraformerOutputKeySubnetName],
}, nil
}
// StatusFromTerraformState computes an InfrastructureStatus from the given
// Terraform variables.
func StatusFromTerraformState(state *TerraformState) *azurev1alpha1.InfrastructureStatus {
return &azurev1alpha1.InfrastructureStatus{
TypeMeta: StatusTypeMeta,
ResourceGroup: azurev1alpha1.ResourceGroup{
Name: state.ResourceGroupName,
},
Networks: azurev1alpha1.NetworkStatus{
VNet: azurev1alpha1.VNetStatus{
Name: state.VNetName,
},
Subnets: []azurev1alpha1.Subnet{
{
Purpose: azurev1alpha1.PurposeNodes,
Name: state.SubnetName,
},
},
},
AvailabilitySets: []azurev1alpha1.AvailabilitySet{
{Name: state.AvailabilitySetName, ID: state.AvailabilitySetID, Purpose: azurev1alpha1.PurposeNodes},
},
RouteTables: []azurev1alpha1.RouteTable{
{Purpose: azurev1alpha1.PurposeNodes, Name: state.RouteTableName},
},
SecurityGroups: []azurev1alpha1.SecurityGroup{
{Name: state.SecurityGroupName, Purpose: azurev1alpha1.PurposeNodes},
},
}
}
// ComputeStatus computes the status based on the Terraformer and the given InfrastructureConfig.
func ComputeStatus(tf *terraformer.Terraformer, config *azurev1alpha1.InfrastructureConfig) (*azurev1alpha1.InfrastructureStatus, error) {
state, err := ExtractTerraformState(tf, config)
if err != nil {
return nil, err
}
return StatusFromTerraformState(state), nil
}