forked from gardener/gardener
/
infrastructure.go
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/
infrastructure.go
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// Copyright 2018 The Gardener 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.
package awsbotanist
import (
"fmt"
gardenv1beta1 "github.com/gardener/gardener/pkg/apis/garden/v1beta1"
"github.com/gardener/gardener/pkg/operation/common"
"github.com/gardener/gardener/pkg/operation/terraformer"
)
// DeployInfrastructure kicks off a Terraform job which deploys the infrastructure.
func (b *AWSBotanist) DeployInfrastructure() error {
var (
createIGW = true
createVPC = true
internetGatewayID = "${aws_internet_gateway.igw.id}"
vpcID = b.Shoot.Info.Spec.Cloud.AWS.Networks.VPC.ID
)
// check if we should use an existing VPC or create a new one
if vpcID != "" {
vpcExists, err := b.ShootAWSClient.CheckIfVPCExists(vpcID)
if err != nil {
return err
}
createVPC = !vpcExists
// check if we should use the existing IGW or create a new one
if vpcExists {
igwID, err := b.ShootAWSClient.GetInternetGateway(vpcID)
if err != nil {
return err
}
if igwID != "" {
internetGatewayID = igwID
createIGW = true
}
}
} else {
vpcID = "${aws_vpc.vpc.id}"
}
machineImage, err := findAMIForRegion(b.Shoot.Info.Spec.Cloud.Region, b.Shoot.CloudProfile.Spec.AWS.MachineImages)
if err != nil {
return err
}
return terraformer.
New(b.Operation, common.TerraformerPurposeInfra).
SetVariablesEnvironment(b.generateTerraformInfraVariablesEnvironment()).
DefineConfig("aws-infra", b.generateTerraformInfraConfig(createVPC, createIGW, vpcID, internetGatewayID, machineImage)).
Apply()
}
// DestroyInfrastructure kicks off a Terraform job which destroys the infrastructure.
func (b *AWSBotanist) DestroyInfrastructure() error {
return terraformer.
New(b.Operation, common.TerraformerPurposeInfra).
SetVariablesEnvironment(b.generateTerraformInfraVariablesEnvironment()).
Destroy()
}
// generateTerraformInfraVariablesEnvironment generates the environment containing the credentials which
// are required to validate/apply/destroy the Terraform configuration. These environment must contain
// Terraform variables which are prefixed with TF_VAR_.
func (b *AWSBotanist) generateTerraformInfraVariablesEnvironment() []map[string]interface{} {
return common.GenerateTerraformVariablesEnvironment(b.Shoot.Secret, map[string]string{
"ACCESS_KEY_ID": AccessKeyID,
"SECRET_ACCESS_KEY": SecretAccessKey,
})
}
// generateTerraformInfraConfig creates the Terraform variables and the Terraform config (for the infrastructure)
// and returns them (these values will be stored as a ConfigMap and a Secret in the Garden cluster.
func (b *AWSBotanist) generateTerraformInfraConfig(createVPC, createIGW bool, vpcID, internetGatewayID string, machineImage gardenv1beta1.AWSMachineImage) map[string]interface{} {
var (
sshSecret = b.Secrets["ssh-keypair"]
cloudConfigDownloaderSecret = b.Secrets["cloud-config-downloader"]
dhcpDomainName = "ec2.internal"
workers = distributeWorkersOverZones(b.Shoot.Info.Spec.Cloud.AWS.Workers, b.Shoot.Info.Spec.Cloud.AWS.Zones)
zones = []map[string]interface{}{}
)
if b.Shoot.Info.Spec.Cloud.Region != "us-east-1" {
dhcpDomainName = fmt.Sprintf("%s.compute.internal", b.Shoot.Info.Spec.Cloud.Region)
}
for zoneIndex, zone := range b.Shoot.Info.Spec.Cloud.AWS.Zones {
zones = append(zones, map[string]interface{}{
"name": zone,
"cidr": map[string]interface{}{
"worker": b.Shoot.Info.Spec.Cloud.AWS.Networks.Workers[zoneIndex],
"public": b.Shoot.Info.Spec.Cloud.AWS.Networks.Public[zoneIndex],
"internal": b.Shoot.Info.Spec.Cloud.AWS.Networks.Internal[zoneIndex],
},
})
}
return map[string]interface{}{
"aws": map[string]interface{}{
"region": b.Shoot.Info.Spec.Cloud.Region,
},
"create": map[string]interface{}{
"vpc": createVPC,
"igw": createIGW,
"clusterAutoscalerPolicies": b.Shoot.Info.Spec.Addons.ClusterAutoscaler.Enabled && !b.Shoot.Info.Spec.Addons.Kube2IAM.Enabled,
},
"sshPublicKey": string(sshSecret.Data["id_rsa.pub"]),
"vpc": map[string]interface{}{
"id": vpcID,
"cidr": b.Shoot.Info.Spec.Cloud.AWS.Networks.VPC.CIDR,
"dhcpDomainName": dhcpDomainName,
"internetGatewayID": internetGatewayID,
},
"clusterName": b.Shoot.SeedNamespace,
"coreOSImage": machineImage.AMI,
"cloudConfig": map[string]interface{}{
"kubeconfig": string(cloudConfigDownloaderSecret.Data["kubeconfig"]),
},
"workers": workers,
"zones": zones,
}
}
// DeployBackupInfrastructure kicks off a Terraform job which deploys the infrastructure resources for backup.
// It sets up the User and the Bucket to store the backups. Allocate permission to the User to access the bucket.
func (b *AWSBotanist) DeployBackupInfrastructure() error {
return terraformer.
New(b.Operation, common.TerraformerPurposeBackup).
SetVariablesEnvironment(b.generateTerraformBackupVariablesEnvironment()).
DefineConfig("aws-backup", b.generateTerraformBackupConfig()).
Apply()
}
// DestroyBackupInfrastructure kicks off a Terraform job which destroys the infrastructure for etcd backup.
func (b *AWSBotanist) DestroyBackupInfrastructure() error {
return terraformer.
New(b.Operation, common.TerraformerPurposeBackup).
SetVariablesEnvironment(b.generateTerraformBackupVariablesEnvironment()).
Destroy()
}
// generateTerraformBackupVariablesEnvironment generates the environment containing the credentials which
// are required to validate/apply/destroy the Terraform configuration. These environment must contain
// Terraform variables which are prefixed with TF_VAR_.
func (b *AWSBotanist) generateTerraformBackupVariablesEnvironment() []map[string]interface{} {
return common.GenerateTerraformVariablesEnvironment(b.Seed.Secret, map[string]string{
"ACCESS_KEY_ID": AccessKeyID,
"SECRET_ACCESS_KEY": SecretAccessKey,
})
}
// generateTerraformBackupConfig creates the Terraform variables and the Terraform config (for the backup)
// and returns them.
func (b *AWSBotanist) generateTerraformBackupConfig() map[string]interface{} {
return map[string]interface{}{
"aws": map[string]interface{}{
"region": b.Shoot.Info.Spec.Cloud.Region,
},
"bucket": map[string]interface{}{
"name": b.Shoot.SeedNamespace,
},
"clusterName": b.Shoot.SeedNamespace,
}
}
func findAMIForRegion(region string, machineImages []gardenv1beta1.AWSMachineImage) (gardenv1beta1.AWSMachineImage, error) {
for _, machineImage := range machineImages {
if machineImage.Region == region {
return machineImage, nil
}
}
return gardenv1beta1.AWSMachineImage{}, fmt.Errorf("could not find an AMI for region %s", region)
}
// distributeWorkersOverZones distributes the worker groups over the zones equally and returns a map
// which can be injected into a Helm chart.
func distributeWorkersOverZones(workerList []gardenv1beta1.AWSWorker, zoneList []string) []map[string]interface{} {
var (
workers = []map[string]interface{}{}
zoneLen = len(zoneList)
)
for _, worker := range workerList {
var workerZones = []map[string]interface{}{}
for zoneIndex, zone := range zoneList {
workerZones = append(workerZones, map[string]interface{}{
"name": zone,
"autoScalerMin": common.DistributeOverZones(zoneIndex, worker.AutoScalerMin, zoneLen),
"autoScalerMax": common.DistributeOverZones(zoneIndex, worker.AutoScalerMax, zoneLen),
})
}
workers = append(workers, map[string]interface{}{
"name": worker.Name,
"machineType": worker.MachineType,
"volumeType": worker.VolumeType,
"volumeSize": common.DiskSize(worker.VolumeSize),
"zones": workerZones,
})
}
return workers
}