terraform/builtin/providers/aws/resource_aws_vpn_gateway.go

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package aws
import (
"fmt"
"log"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceAwsVpnGateway() *schema.Resource {
return &schema.Resource{
Create: resourceAwsVpnGatewayCreate,
Read: resourceAwsVpnGatewayRead,
Update: resourceAwsVpnGatewayUpdate,
Delete: resourceAwsVpnGatewayDelete,
Importer: &schema.ResourceImporter{
State: schema.ImportStatePassthrough,
},
Schema: map[string]*schema.Schema{
"availability_zone": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ForceNew: true,
},
"vpc_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
},
"tags": tagsSchema(),
},
}
}
func resourceAwsVpnGatewayCreate(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ec2conn
createOpts := &ec2.CreateVpnGatewayInput{
AvailabilityZone: aws.String(d.Get("availability_zone").(string)),
Type: aws.String("ipsec.1"),
}
// Create the VPN gateway
log.Printf("[DEBUG] Creating VPN gateway")
resp, err := conn.CreateVpnGateway(createOpts)
if err != nil {
return fmt.Errorf("Error creating VPN gateway: %s", err)
}
// Get the ID and store it
vpnGateway := resp.VpnGateway
d.SetId(*vpnGateway.VpnGatewayId)
log.Printf("[INFO] VPN Gateway ID: %s", *vpnGateway.VpnGatewayId)
// Attach the VPN gateway to the correct VPC
return resourceAwsVpnGatewayUpdate(d, meta)
}
func resourceAwsVpnGatewayRead(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ec2conn
resp, err := conn.DescribeVpnGateways(&ec2.DescribeVpnGatewaysInput{
VpnGatewayIds: []*string{aws.String(d.Id())},
})
if err != nil {
if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "InvalidVpnGatewayID.NotFound" {
d.SetId("")
return nil
} else {
log.Printf("[ERROR] Error finding VpnGateway: %s", err)
return err
}
}
vpnGateway := resp.VpnGateways[0]
if vpnGateway == nil || *vpnGateway.State == "deleted" {
// Seems we have lost our VPN gateway
d.SetId("")
return nil
}
vpnAttachment := vpnGatewayGetAttachment(vpnGateway)
if len(vpnGateway.VpcAttachments) == 0 || *vpnAttachment.State == "detached" {
// Gateway exists but not attached to the VPC
d.Set("vpc_id", "")
} else {
d.Set("vpc_id", *vpnAttachment.VpcId)
}
d.Set("availability_zone", vpnGateway.AvailabilityZone)
d.Set("tags", tagsToMap(vpnGateway.Tags))
return nil
}
func resourceAwsVpnGatewayUpdate(d *schema.ResourceData, meta interface{}) error {
if d.HasChange("vpc_id") {
// If we're already attached, detach it first
if err := resourceAwsVpnGatewayDetach(d, meta); err != nil {
return err
}
// Attach the VPN gateway to the new vpc
if err := resourceAwsVpnGatewayAttach(d, meta); err != nil {
return err
}
}
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conn := meta.(*AWSClient).ec2conn
if err := setTags(conn, d); err != nil {
return err
}
d.SetPartial("tags")
return resourceAwsVpnGatewayRead(d, meta)
}
func resourceAwsVpnGatewayDelete(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ec2conn
// Detach if it is attached
if err := resourceAwsVpnGatewayDetach(d, meta); err != nil {
return err
}
log.Printf("[INFO] Deleting VPN gateway: %s", d.Id())
return resource.Retry(5*time.Minute, func() *resource.RetryError {
_, err := conn.DeleteVpnGateway(&ec2.DeleteVpnGatewayInput{
VpnGatewayId: aws.String(d.Id()),
})
if err == nil {
return nil
}
ec2err, ok := err.(awserr.Error)
if !ok {
return resource.RetryableError(err)
}
switch ec2err.Code() {
case "InvalidVpnGatewayID.NotFound":
return nil
case "IncorrectState":
return resource.RetryableError(err)
}
return resource.NonRetryableError(err)
})
}
func resourceAwsVpnGatewayAttach(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ec2conn
if d.Get("vpc_id").(string) == "" {
log.Printf(
"[DEBUG] Not attaching VPN Gateway '%s' as no VPC ID is set",
d.Id())
return nil
}
log.Printf(
"[INFO] Attaching VPN Gateway '%s' to VPC '%s'",
d.Id(),
d.Get("vpc_id").(string))
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req := &ec2.AttachVpnGatewayInput{
VpnGatewayId: aws.String(d.Id()),
VpcId: aws.String(d.Get("vpc_id").(string)),
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}
err := resource.Retry(30*time.Second, func() *resource.RetryError {
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_, err := conn.AttachVpnGateway(req)
if err != nil {
if ec2err, ok := err.(awserr.Error); ok {
if "InvalidVpnGatewayID.NotFound" == ec2err.Code() {
return resource.RetryableError(
fmt.Errorf("Gateway not found, retry for eventual consistancy"))
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}
}
return resource.NonRetryableError(err)
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}
return nil
})
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if err != nil {
return err
}
// Wait for it to be fully attached before continuing
log.Printf("[DEBUG] Waiting for VPN gateway (%s) to attach", d.Id())
stateConf := &resource.StateChangeConf{
Pending: []string{"detached", "attaching"},
Target: []string{"attached"},
Refresh: vpnGatewayAttachStateRefreshFunc(conn, d.Id(), "available"),
Timeout: 1 * time.Minute,
}
if _, err := stateConf.WaitForState(); err != nil {
return fmt.Errorf(
"Error waiting for VPN gateway (%s) to attach: %s",
d.Id(), err)
}
return nil
}
func resourceAwsVpnGatewayDetach(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ec2conn
// Get the old VPC ID to detach from
vpcID, _ := d.GetChange("vpc_id")
if vpcID.(string) == "" {
log.Printf(
"[DEBUG] Not detaching VPN Gateway '%s' as no VPC ID is set",
d.Id())
return nil
}
log.Printf(
"[INFO] Detaching VPN Gateway '%s' from VPC '%s'",
d.Id(),
vpcID.(string))
wait := true
_, err := conn.DetachVpnGateway(&ec2.DetachVpnGatewayInput{
VpnGatewayId: aws.String(d.Id()),
VpcId: aws.String(vpcID.(string)),
})
if err != nil {
ec2err, ok := err.(awserr.Error)
if ok {
if ec2err.Code() == "InvalidVpnGatewayID.NotFound" {
err = nil
wait = false
} else if ec2err.Code() == "InvalidVpnGatewayAttachment.NotFound" {
err = nil
wait = false
}
}
if err != nil {
return err
}
}
if !wait {
return nil
}
// Wait for it to be fully detached before continuing
log.Printf("[DEBUG] Waiting for VPN gateway (%s) to detach", d.Id())
stateConf := &resource.StateChangeConf{
Pending: []string{"attached", "detaching", "available"},
Target: []string{"detached"},
Refresh: vpnGatewayAttachStateRefreshFunc(conn, d.Id(), "detached"),
Timeout: 1 * time.Minute,
}
if _, err := stateConf.WaitForState(); err != nil {
return fmt.Errorf(
"Error waiting for vpn gateway (%s) to detach: %s",
d.Id(), err)
}
return nil
}
// vpnGatewayAttachStateRefreshFunc returns a resource.StateRefreshFunc that is used to watch
// the state of a VPN gateway's attachment
func vpnGatewayAttachStateRefreshFunc(conn *ec2.EC2, id string, expected string) resource.StateRefreshFunc {
var start time.Time
return func() (interface{}, string, error) {
if start.IsZero() {
start = time.Now()
}
resp, err := conn.DescribeVpnGateways(&ec2.DescribeVpnGatewaysInput{
VpnGatewayIds: []*string{aws.String(id)},
})
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if err != nil {
if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "InvalidVpnGatewayID.NotFound" {
resp = nil
} else {
log.Printf("[ERROR] Error on VpnGatewayStateRefresh: %s", err)
return nil, "", err
}
}
if resp == nil {
// Sometimes AWS just has consistency issues and doesn't see
// our instance yet. Return an empty state.
return nil, "", nil
}
vpnGateway := resp.VpnGateways[0]
if len(vpnGateway.VpcAttachments) == 0 {
// No attachments, we're detached
return vpnGateway, "detached", nil
}
vpnAttachment := vpnGatewayGetAttachment(vpnGateway)
return vpnGateway, *vpnAttachment.State, nil
}
}
func vpnGatewayGetAttachment(vgw *ec2.VpnGateway) *ec2.VpcAttachment {
for _, v := range vgw.VpcAttachments {
if *v.State == "attached" {
return v
}
}
return &ec2.VpcAttachment{State: aws.String("detached")}
}