github.com/cbroglie/terraform@v0.7.0-rc3.0.20170410193827-735dfc416d46/builtin/providers/aws/data_source_aws_subnet_ids.go (about)

     1  package aws
     2  
     3  import (
     4  	"fmt"
     5  	"log"
     6  
     7  	"github.com/aws/aws-sdk-go/service/ec2"
     8  	"github.com/hashicorp/terraform/helper/schema"
     9  )
    10  
    11  func dataSourceAwsSubnetIDs() *schema.Resource {
    12  	return &schema.Resource{
    13  		Read: dataSourceAwsSubnetIDsRead,
    14  		Schema: map[string]*schema.Schema{
    15  			"vpc_id": &schema.Schema{
    16  				Type:     schema.TypeString,
    17  				Required: true,
    18  			},
    19  			"ids": &schema.Schema{
    20  				Type:     schema.TypeSet,
    21  				Computed: true,
    22  				Elem:     &schema.Schema{Type: schema.TypeString},
    23  				Set:      schema.HashString,
    24  			},
    25  		},
    26  	}
    27  }
    28  
    29  func dataSourceAwsSubnetIDsRead(d *schema.ResourceData, meta interface{}) error {
    30  	conn := meta.(*AWSClient).ec2conn
    31  
    32  	req := &ec2.DescribeSubnetsInput{}
    33  
    34  	req.Filters = buildEC2AttributeFilterList(
    35  		map[string]string{
    36  			"vpc-id": d.Get("vpc_id").(string),
    37  		},
    38  	)
    39  
    40  	log.Printf("[DEBUG] DescribeSubnets %s\n", req)
    41  	resp, err := conn.DescribeSubnets(req)
    42  	if err != nil {
    43  		return err
    44  	}
    45  
    46  	if resp == nil || len(resp.Subnets) == 0 {
    47  		return fmt.Errorf("no matching subnet found for vpc with id %s", d.Get("vpc_id").(string))
    48  	}
    49  
    50  	subnets := make([]string, 0)
    51  
    52  	for _, subnet := range resp.Subnets {
    53  		subnets = append(subnets, *subnet.SubnetId)
    54  	}
    55  
    56  	d.SetId(d.Get("vpc_id").(string))
    57  	d.Set("ids", subnets)
    58  
    59  	return nil
    60  }