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/
transit_gateway.go
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/
transit_gateway.go
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// Copyright 2020 The Terraformer 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 aws
import (
"context"
"log"
"github.com/GoogleCloudPlatform/terraformer/terraformutils"
"github.com/aws/aws-sdk-go-v2/service/ec2"
)
var tgwAllowEmptyValues = []string{"tags."}
type TransitGatewayGenerator struct {
AWSService
}
func (g *TransitGatewayGenerator) getTransitGateways(svc *ec2.Client) error {
p := ec2.NewDescribeTransitGatewaysPaginator(svc, &ec2.DescribeTransitGatewaysInput{})
for p.HasMorePages() {
page, err := p.NextPage(context.TODO())
if err != nil {
return err
}
for _, tgw := range page.TransitGateways {
g.Resources = append(g.Resources, terraformutils.NewSimpleResource(
StringValue(tgw.TransitGatewayId),
StringValue(tgw.TransitGatewayId),
"aws_ec2_transit_gateway",
"aws",
tgwAllowEmptyValues,
))
}
}
return nil
}
func (g *TransitGatewayGenerator) getTransitGatewayRouteTables(svc *ec2.Client) error {
p := ec2.NewDescribeTransitGatewayRouteTablesPaginator(svc, &ec2.DescribeTransitGatewayRouteTablesInput{})
for p.HasMorePages() {
page, err := p.NextPage(context.TODO())
if err != nil {
return err
}
for _, tgwrt := range page.TransitGatewayRouteTables {
// Default route table are automatically created on the tgw creation
if tgwrt.DefaultAssociationRouteTable {
continue
} else {
g.Resources = append(g.Resources, terraformutils.NewSimpleResource(
StringValue(tgwrt.TransitGatewayRouteTableId),
StringValue(tgwrt.TransitGatewayRouteTableId),
"aws_ec2_transit_gateway_route_table",
"aws",
tgwAllowEmptyValues,
))
}
}
}
return nil
}
func (g *TransitGatewayGenerator) getTransitGatewayVpcAttachments(svc *ec2.Client) error {
p := ec2.NewDescribeTransitGatewayVpcAttachmentsPaginator(svc, &ec2.DescribeTransitGatewayVpcAttachmentsInput{})
for p.HasMorePages() {
page, err := p.NextPage(context.TODO())
if err != nil {
return err
}
for _, tgwa := range page.TransitGatewayVpcAttachments {
g.Resources = append(g.Resources, terraformutils.NewSimpleResource(
StringValue(tgwa.TransitGatewayAttachmentId),
StringValue(tgwa.TransitGatewayAttachmentId),
"aws_ec2_transit_gateway_vpc_attachment",
"aws",
tgwAllowEmptyValues,
))
}
}
return nil
}
// Generate TerraformResources from AWS API,
// from each customer gateway create 1 TerraformResource.
// Need CustomerGatewayId as ID for terraform resource
func (g *TransitGatewayGenerator) InitResources() error {
config, e := g.generateConfig()
if e != nil {
return e
}
svc := ec2.NewFromConfig(config)
g.Resources = []terraformutils.Resource{}
err := g.getTransitGateways(svc)
if err != nil {
log.Println(err)
}
err = g.getTransitGatewayRouteTables(svc)
if err != nil {
log.Println(err)
}
err = g.getTransitGatewayVpcAttachments(svc)
if err != nil {
log.Println(err)
}
return nil
}