terraform/builtin/providers/aws/resource_aws_subnet.go

227 lines
5.3 KiB
Go

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 resourceAwsSubnet() *schema.Resource {
return &schema.Resource{
Create: resourceAwsSubnetCreate,
Read: resourceAwsSubnetRead,
Update: resourceAwsSubnetUpdate,
Delete: resourceAwsSubnetDelete,
Schema: map[string]*schema.Schema{
"vpc_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ForceNew: true,
Computed: true,
},
"cidr_block": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"availability_zone": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
},
"map_public_ip_on_launch": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
Default: false,
},
"tags": tagsSchema(),
},
}
}
func resourceAwsSubnetCreate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
createOpts := &ec2.CreateSubnetInput{
AvailabilityZone: aws.String(d.Get("availability_zone").(string)),
CIDRBlock: aws.String(d.Get("cidr_block").(string)),
VPCID: aws.String(d.Get("vpc_id").(string)),
}
var err error
resp, err := conn.CreateSubnet(createOpts)
if err != nil {
return fmt.Errorf("Error creating subnet: %s", err)
}
// Get the ID and store it
subnet := resp.Subnet
d.SetId(*subnet.SubnetID)
log.Printf("[INFO] Subnet ID: %s", *subnet.SubnetID)
// Wait for the Subnet to become available
log.Printf("[DEBUG] Waiting for subnet (%s) to become available", *subnet.SubnetID)
stateConf := &resource.StateChangeConf{
Pending: []string{"pending"},
Target: "available",
Refresh: SubnetStateRefreshFunc(conn, *subnet.SubnetID),
Timeout: 10 * time.Minute,
}
_, err = stateConf.WaitForState()
if err != nil {
return fmt.Errorf(
"Error waiting for subnet (%s) to become ready: %s",
d.Id(), err)
}
return resourceAwsSubnetUpdate(d, meta)
}
func resourceAwsSubnetRead(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
resp, err := conn.DescribeSubnets(&ec2.DescribeSubnetsInput{
SubnetIDs: []*string{aws.String(d.Id())},
})
if err != nil {
if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "InvalidSubnetID.NotFound" {
// Update state to indicate the subnet no longer exists.
d.SetId("")
return nil
}
return err
}
if resp == nil {
return nil
}
subnet := resp.Subnets[0]
d.Set("vpc_id", subnet.VPCID)
d.Set("availability_zone", subnet.AvailabilityZone)
d.Set("cidr_block", subnet.CIDRBlock)
d.Set("map_public_ip_on_launch", subnet.MapPublicIPOnLaunch)
d.Set("tags", tagsToMap(subnet.Tags))
return nil
}
func resourceAwsSubnetUpdate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
d.Partial(true)
if err := setTags(conn, d); err != nil {
return err
} else {
d.SetPartial("tags")
}
if d.HasChange("map_public_ip_on_launch") {
modifyOpts := &ec2.ModifySubnetAttributeInput{
SubnetID: aws.String(d.Id()),
MapPublicIPOnLaunch: &ec2.AttributeBooleanValue{
Value: aws.Boolean(d.Get("map_public_ip_on_launch").(bool)),
},
}
log.Printf("[DEBUG] Subnet modify attributes: %#v", modifyOpts)
_, err := conn.ModifySubnetAttribute(modifyOpts)
if err != nil {
return err
} else {
d.SetPartial("map_public_ip_on_launch")
}
}
d.Partial(false)
return resourceAwsSubnetRead(d, meta)
}
func resourceAwsSubnetDelete(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
log.Printf("[INFO] Deleting subnet: %s", d.Id())
req := &ec2.DeleteSubnetInput{
SubnetID: aws.String(d.Id()),
}
wait := resource.StateChangeConf{
Pending: []string{"pending"},
Target: "destroyed",
Timeout: 5 * time.Minute,
MinTimeout: 1 * time.Second,
Refresh: func() (interface{}, string, error) {
_, err := conn.DeleteSubnet(req)
if err != nil {
if apiErr, ok := err.(awserr.Error); ok {
if apiErr.Code() == "DependencyViolation" {
// There is some pending operation, so just retry
// in a bit.
return 42, "pending", nil
}
if apiErr.Code() == "InvalidSubnetID.NotFound" {
return 42, "destroyed", nil
}
}
return 42, "failure", err
}
return 42, "destroyed", nil
},
}
if _, err := wait.WaitForState(); err != nil {
return fmt.Errorf("Error deleting subnet: %s", err)
}
return nil
}
// SubnetStateRefreshFunc returns a resource.StateRefreshFunc that is used to watch a Subnet.
func SubnetStateRefreshFunc(conn *ec2.EC2, id string) resource.StateRefreshFunc {
return func() (interface{}, string, error) {
resp, err := conn.DescribeSubnets(&ec2.DescribeSubnetsInput{
SubnetIDs: []*string{aws.String(id)},
})
if err != nil {
if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "InvalidSubnetID.NotFound" {
resp = nil
} else {
log.Printf("Error on SubnetStateRefresh: %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
}
subnet := resp.Subnets[0]
return subnet, *subnet.State, nil
}
}