github.com/GoogleCloudPlatform/terraformer@v0.8.18/providers/aws/transit_gateway.go (about)

     1  // Copyright 2020 The Terraformer Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package aws
    16  
    17  import (
    18  	"context"
    19  	"log"
    20  
    21  	"github.com/GoogleCloudPlatform/terraformer/terraformutils"
    22  
    23  	"github.com/aws/aws-sdk-go-v2/service/ec2"
    24  )
    25  
    26  var tgwAllowEmptyValues = []string{"tags."}
    27  
    28  type TransitGatewayGenerator struct {
    29  	AWSService
    30  }
    31  
    32  func (g *TransitGatewayGenerator) getTransitGateways(svc *ec2.Client) error {
    33  	p := ec2.NewDescribeTransitGatewaysPaginator(svc, &ec2.DescribeTransitGatewaysInput{})
    34  	for p.HasMorePages() {
    35  		page, err := p.NextPage(context.TODO())
    36  		if err != nil {
    37  			return err
    38  		}
    39  		for _, tgw := range page.TransitGateways {
    40  			g.Resources = append(g.Resources, terraformutils.NewSimpleResource(
    41  				StringValue(tgw.TransitGatewayId),
    42  				StringValue(tgw.TransitGatewayId),
    43  				"aws_ec2_transit_gateway",
    44  				"aws",
    45  				tgwAllowEmptyValues,
    46  			))
    47  		}
    48  	}
    49  	return nil
    50  }
    51  
    52  func (g *TransitGatewayGenerator) getTransitGatewayRouteTables(svc *ec2.Client) error {
    53  	p := ec2.NewDescribeTransitGatewayRouteTablesPaginator(svc, &ec2.DescribeTransitGatewayRouteTablesInput{})
    54  	for p.HasMorePages() {
    55  		page, err := p.NextPage(context.TODO())
    56  		if err != nil {
    57  			return err
    58  		}
    59  		for _, tgwrt := range page.TransitGatewayRouteTables {
    60  			// Default route table are automatically created on the tgw creation
    61  			if tgwrt.DefaultAssociationRouteTable {
    62  				continue
    63  			} else {
    64  				g.Resources = append(g.Resources, terraformutils.NewSimpleResource(
    65  					StringValue(tgwrt.TransitGatewayRouteTableId),
    66  					StringValue(tgwrt.TransitGatewayRouteTableId),
    67  					"aws_ec2_transit_gateway_route_table",
    68  					"aws",
    69  					tgwAllowEmptyValues,
    70  				))
    71  			}
    72  		}
    73  	}
    74  	return nil
    75  }
    76  
    77  func (g *TransitGatewayGenerator) getTransitGatewayVpcAttachments(svc *ec2.Client) error {
    78  	p := ec2.NewDescribeTransitGatewayVpcAttachmentsPaginator(svc, &ec2.DescribeTransitGatewayVpcAttachmentsInput{})
    79  	for p.HasMorePages() {
    80  		page, err := p.NextPage(context.TODO())
    81  		if err != nil {
    82  			return err
    83  		}
    84  		for _, tgwa := range page.TransitGatewayVpcAttachments {
    85  			g.Resources = append(g.Resources, terraformutils.NewSimpleResource(
    86  				StringValue(tgwa.TransitGatewayAttachmentId),
    87  				StringValue(tgwa.TransitGatewayAttachmentId),
    88  				"aws_ec2_transit_gateway_vpc_attachment",
    89  				"aws",
    90  				tgwAllowEmptyValues,
    91  			))
    92  		}
    93  	}
    94  	return nil
    95  }
    96  
    97  // Generate TerraformResources from AWS API,
    98  // from each customer gateway create 1 TerraformResource.
    99  // Need CustomerGatewayId as ID for terraform resource
   100  func (g *TransitGatewayGenerator) InitResources() error {
   101  	config, e := g.generateConfig()
   102  	if e != nil {
   103  		return e
   104  	}
   105  	svc := ec2.NewFromConfig(config)
   106  	g.Resources = []terraformutils.Resource{}
   107  	err := g.getTransitGateways(svc)
   108  	if err != nil {
   109  		log.Println(err)
   110  	}
   111  
   112  	err = g.getTransitGatewayRouteTables(svc)
   113  	if err != nil {
   114  		log.Println(err)
   115  	}
   116  
   117  	err = g.getTransitGatewayVpcAttachments(svc)
   118  	if err != nil {
   119  		log.Println(err)
   120  	}
   121  
   122  	return nil
   123  }