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resource_aws_eip_association.go
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resource_aws_eip_association.go
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package aws
import (
"fmt"
"log"
"net"
"time"
"github.com/hashicorp/terraform/helper/resource"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceAwsEipAssociation() *schema.Resource {
return &schema.Resource{
Create: resourceAwsEipAssociationCreate,
Read: resourceAwsEipAssociationRead,
Delete: resourceAwsEipAssociationDelete,
Schema: map[string]*schema.Schema{
"allocation_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
},
"allow_reassociation": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
ForceNew: true,
},
"instance_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
},
"network_interface_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
},
"private_ip_address": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
},
"public_ip": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
},
},
}
}
func resourceAwsEipAssociationCreate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
request := &ec2.AssociateAddressInput{}
if v, ok := d.GetOk("allocation_id"); ok {
request.AllocationId = aws.String(v.(string))
}
if v, ok := d.GetOk("allow_reassociation"); ok {
request.AllowReassociation = aws.Bool(v.(bool))
}
if v, ok := d.GetOk("instance_id"); ok {
request.InstanceId = aws.String(v.(string))
}
if v, ok := d.GetOk("network_interface_id"); ok {
request.NetworkInterfaceId = aws.String(v.(string))
}
if v, ok := d.GetOk("private_ip_address"); ok {
request.PrivateIpAddress = aws.String(v.(string))
}
if v, ok := d.GetOk("public_ip"); ok {
request.PublicIp = aws.String(v.(string))
}
log.Printf("[DEBUG] EIP association configuration: %#v", request)
var resp *ec2.AssociateAddressOutput
err := resource.Retry(2*time.Minute, func() *resource.RetryError {
var err error
resp, err = conn.AssociateAddress(request)
if err != nil {
if isAWSErr(err, "InvalidInstanceID", "pending instance") {
return resource.RetryableError(err)
}
return resource.NonRetryableError(err)
}
return nil
})
if err != nil {
return fmt.Errorf("Error associating EIP: %s", err)
}
log.Printf("[DEBUG] EIP Assoc Response: %s", resp)
supportedPlatforms := meta.(*AWSClient).supportedplatforms
if len(supportedPlatforms) > 0 && !hasEc2Classic(supportedPlatforms) && resp.AssociationId == nil {
// We expect no association ID in EC2 Classic
// but still error out if ID is missing and we _know_ it's NOT EC2 Classic
return fmt.Errorf("Received no EIP Association ID in account that doesn't support EC2 Classic (%q): %s",
supportedPlatforms, resp)
}
if resp.AssociationId == nil {
// This is required field for EC2 Classic per docs
d.SetId(*request.PublicIp)
} else {
d.SetId(*resp.AssociationId)
}
return resourceAwsEipAssociationRead(d, meta)
}
func resourceAwsEipAssociationRead(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
request, err := describeAddressesById(d.Id(), meta.(*AWSClient).supportedplatforms)
if err != nil {
return err
}
response, err := conn.DescribeAddresses(request)
if err != nil {
return fmt.Errorf("Error reading EC2 Elastic IP %s: %#v", d.Get("allocation_id").(string), err)
}
if response.Addresses == nil || len(response.Addresses) == 0 {
log.Printf("[INFO] EIP Association ID Not Found. Refreshing from state")
d.SetId("")
return nil
}
return readAwsEipAssociation(d, response.Addresses[0])
}
func resourceAwsEipAssociationDelete(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
var opts *ec2.DisassociateAddressInput
// We assume EC2 Classic if ID is a valid IPv4 address
ip := net.ParseIP(d.Id())
if ip != nil {
supportedPlatforms := meta.(*AWSClient).supportedplatforms
if len(supportedPlatforms) > 0 && !hasEc2Classic(supportedPlatforms) {
return fmt.Errorf("Received IPv4 address as ID in account that doesn't support EC2 Classic (%q)",
supportedPlatforms)
}
opts = &ec2.DisassociateAddressInput{
PublicIp: aws.String(d.Id()),
}
} else {
opts = &ec2.DisassociateAddressInput{
AssociationId: aws.String(d.Id()),
}
}
_, err := conn.DisassociateAddress(opts)
if err != nil {
return fmt.Errorf("Error deleting Elastic IP association: %s", err)
}
return nil
}
func readAwsEipAssociation(d *schema.ResourceData, address *ec2.Address) error {
if err := d.Set("allocation_id", address.AllocationId); err != nil {
return err
}
if err := d.Set("instance_id", address.InstanceId); err != nil {
return err
}
if err := d.Set("network_interface_id", address.NetworkInterfaceId); err != nil {
return err
}
if err := d.Set("private_ip_address", address.PrivateIpAddress); err != nil {
return err
}
if err := d.Set("public_ip", address.PublicIp); err != nil {
return err
}
return nil
}
func describeAddressesById(id string, supportedPlatforms []string) (*ec2.DescribeAddressesInput, error) {
// We assume EC2 Classic if ID is a valid IPv4 address
ip := net.ParseIP(id)
if ip != nil {
if len(supportedPlatforms) > 0 && !hasEc2Classic(supportedPlatforms) {
return nil, fmt.Errorf("Received IPv4 address as ID in account that doesn't support EC2 Classic (%q)",
supportedPlatforms)
}
return &ec2.DescribeAddressesInput{
Filters: []*ec2.Filter{
&ec2.Filter{
Name: aws.String("public-ip"),
Values: []*string{aws.String(id)},
},
&ec2.Filter{
Name: aws.String("domain"),
Values: []*string{aws.String("standard")},
},
},
}, nil
}
return &ec2.DescribeAddressesInput{
Filters: []*ec2.Filter{
&ec2.Filter{
Name: aws.String("association-id"),
Values: []*string{aws.String(id)},
},
},
}, nil
}