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resource_aws_network_interface.go
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resource_aws_network_interface.go
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package aws
import (
"bytes"
"fmt"
"log"
"strconv"
"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/hashcode"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceAwsNetworkInterface() *schema.Resource {
return &schema.Resource{
Create: resourceAwsNetworkInterfaceCreate,
Read: resourceAwsNetworkInterfaceRead,
Update: resourceAwsNetworkInterfaceUpdate,
Delete: resourceAwsNetworkInterfaceDelete,
Schema: map[string]*schema.Schema{
"subnet_id": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"private_ips": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Computed: true,
Elem: &schema.Schema{Type: schema.TypeString},
Set: schema.HashString,
},
"security_groups": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Computed: true,
Elem: &schema.Schema{Type: schema.TypeString},
Set: schema.HashString,
},
"source_dest_check": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
Default: true,
},
"description": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
"attachment": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Computed: true,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"instance": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"device_index": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
"attachment_id": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
},
},
Set: resourceAwsEniAttachmentHash,
},
"tags": tagsSchema(),
},
}
}
func resourceAwsNetworkInterfaceCreate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
request := &ec2.CreateNetworkInterfaceInput{
SubnetId: aws.String(d.Get("subnet_id").(string)),
}
security_groups := d.Get("security_groups").(*schema.Set).List()
if len(security_groups) != 0 {
request.Groups = expandStringList(security_groups)
}
private_ips := d.Get("private_ips").(*schema.Set).List()
if len(private_ips) != 0 {
request.PrivateIpAddresses = expandPrivateIPAddresses(private_ips)
}
if v, ok := d.GetOk("description"); ok {
request.Description = aws.String(v.(string))
}
log.Printf("[DEBUG] Creating network interface")
resp, err := conn.CreateNetworkInterface(request)
if err != nil {
return fmt.Errorf("Error creating ENI: %s", err)
}
d.SetId(*resp.NetworkInterface.NetworkInterfaceId)
log.Printf("[INFO] ENI ID: %s", d.Id())
return resourceAwsNetworkInterfaceUpdate(d, meta)
}
func resourceAwsNetworkInterfaceRead(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
describe_network_interfaces_request := &ec2.DescribeNetworkInterfacesInput{
NetworkInterfaceIds: []*string{aws.String(d.Id())},
}
describeResp, err := conn.DescribeNetworkInterfaces(describe_network_interfaces_request)
if err != nil {
if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "InvalidNetworkInterfaceID.NotFound" {
// The ENI is gone now, so just remove it from the state
d.SetId("")
return nil
}
return fmt.Errorf("Error retrieving ENI: %s", err)
}
if len(describeResp.NetworkInterfaces) != 1 {
return fmt.Errorf("Unable to find ENI: %#v", describeResp.NetworkInterfaces)
}
eni := describeResp.NetworkInterfaces[0]
d.Set("subnet_id", eni.SubnetId)
d.Set("private_ips", flattenNetworkInterfacesPrivateIPAddresses(eni.PrivateIpAddresses))
d.Set("security_groups", flattenGroupIdentifiers(eni.Groups))
d.Set("source_dest_check", eni.SourceDestCheck)
if eni.Description != nil {
d.Set("description", eni.Description)
}
// Tags
d.Set("tags", tagsToMap(eni.TagSet))
if eni.Attachment != nil {
attachment := []map[string]interface{}{flattenAttachment(eni.Attachment)}
d.Set("attachment", attachment)
} else {
d.Set("attachment", nil)
}
return nil
}
func networkInterfaceAttachmentRefreshFunc(conn *ec2.EC2, id string) resource.StateRefreshFunc {
return func() (interface{}, string, error) {
describe_network_interfaces_request := &ec2.DescribeNetworkInterfacesInput{
NetworkInterfaceIds: []*string{aws.String(id)},
}
describeResp, err := conn.DescribeNetworkInterfaces(describe_network_interfaces_request)
if err != nil {
log.Printf("[ERROR] Could not find network interface %s. %s", id, err)
return nil, "", err
}
eni := describeResp.NetworkInterfaces[0]
hasAttachment := strconv.FormatBool(eni.Attachment != nil)
log.Printf("[DEBUG] ENI %s has attachment state %s", id, hasAttachment)
return eni, hasAttachment, nil
}
}
func resourceAwsNetworkInterfaceDetach(oa *schema.Set, meta interface{}, eniId string) error {
// if there was an old attachment, remove it
if oa != nil && len(oa.List()) > 0 {
old_attachment := oa.List()[0].(map[string]interface{})
detach_request := &ec2.DetachNetworkInterfaceInput{
AttachmentId: aws.String(old_attachment["attachment_id"].(string)),
Force: aws.Bool(true),
}
conn := meta.(*AWSClient).ec2conn
_, detach_err := conn.DetachNetworkInterface(detach_request)
if detach_err != nil {
return fmt.Errorf("Error detaching ENI: %s", detach_err)
}
log.Printf("[DEBUG] Waiting for ENI (%s) to become dettached", eniId)
stateConf := &resource.StateChangeConf{
Pending: []string{"true"},
Target: []string{"false"},
Refresh: networkInterfaceAttachmentRefreshFunc(conn, eniId),
Timeout: 10 * time.Minute,
}
if _, err := stateConf.WaitForState(); err != nil {
return fmt.Errorf(
"Error waiting for ENI (%s) to become dettached: %s", eniId, err)
}
}
return nil
}
func resourceAwsNetworkInterfaceUpdate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
d.Partial(true)
if d.HasChange("attachment") {
oa, na := d.GetChange("attachment")
detach_err := resourceAwsNetworkInterfaceDetach(oa.(*schema.Set), meta, d.Id())
if detach_err != nil {
return detach_err
}
// if there is a new attachment, attach it
if na != nil && len(na.(*schema.Set).List()) > 0 {
new_attachment := na.(*schema.Set).List()[0].(map[string]interface{})
di := new_attachment["device_index"].(int)
attach_request := &ec2.AttachNetworkInterfaceInput{
DeviceIndex: aws.Int64(int64(di)),
InstanceId: aws.String(new_attachment["instance"].(string)),
NetworkInterfaceId: aws.String(d.Id()),
}
_, attach_err := conn.AttachNetworkInterface(attach_request)
if attach_err != nil {
return fmt.Errorf("Error attaching ENI: %s", attach_err)
}
}
d.SetPartial("attachment")
}
if d.HasChange("private_ips") {
o, n := d.GetChange("private_ips")
if o == nil {
o = new(schema.Set)
}
if n == nil {
n = new(schema.Set)
}
os := o.(*schema.Set)
ns := n.(*schema.Set)
// Unassign old IP addresses
unassignIps := os.Difference(ns)
if unassignIps.Len() != 0 {
input := &ec2.UnassignPrivateIpAddressesInput{
NetworkInterfaceId: aws.String(d.Id()),
PrivateIpAddresses: expandStringList(unassignIps.List()),
}
_, err := conn.UnassignPrivateIpAddresses(input)
if err != nil {
return fmt.Errorf("Failure to unassign Private IPs: %s", err)
}
}
// Assign new IP addresses
assignIps := ns.Difference(os)
if assignIps.Len() != 0 {
input := &ec2.AssignPrivateIpAddressesInput{
NetworkInterfaceId: aws.String(d.Id()),
PrivateIpAddresses: expandStringList(assignIps.List()),
}
_, err := conn.AssignPrivateIpAddresses(input)
if err != nil {
return fmt.Errorf("Failure to assign Private IPs: %s", err)
}
}
d.SetPartial("private_ips")
}
request := &ec2.ModifyNetworkInterfaceAttributeInput{
NetworkInterfaceId: aws.String(d.Id()),
SourceDestCheck: &ec2.AttributeBooleanValue{Value: aws.Bool(d.Get("source_dest_check").(bool))},
}
_, err := conn.ModifyNetworkInterfaceAttribute(request)
if err != nil {
return fmt.Errorf("Failure updating ENI: %s", err)
}
d.SetPartial("source_dest_check")
if d.HasChange("security_groups") {
request := &ec2.ModifyNetworkInterfaceAttributeInput{
NetworkInterfaceId: aws.String(d.Id()),
Groups: expandStringList(d.Get("security_groups").(*schema.Set).List()),
}
_, err := conn.ModifyNetworkInterfaceAttribute(request)
if err != nil {
return fmt.Errorf("Failure updating ENI: %s", err)
}
d.SetPartial("security_groups")
}
if d.HasChange("description") {
request := &ec2.ModifyNetworkInterfaceAttributeInput{
NetworkInterfaceId: aws.String(d.Id()),
Description: &ec2.AttributeValue{Value: aws.String(d.Get("description").(string))},
}
_, err := conn.ModifyNetworkInterfaceAttribute(request)
if err != nil {
return fmt.Errorf("Failure updating ENI: %s", err)
}
d.SetPartial("description")
}
if err := setTags(conn, d); err != nil {
return err
} else {
d.SetPartial("tags")
}
d.Partial(false)
return resourceAwsNetworkInterfaceRead(d, meta)
}
func resourceAwsNetworkInterfaceDelete(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
log.Printf("[INFO] Deleting ENI: %s", d.Id())
detach_err := resourceAwsNetworkInterfaceDetach(d.Get("attachment").(*schema.Set), meta, d.Id())
if detach_err != nil {
return detach_err
}
deleteEniOpts := ec2.DeleteNetworkInterfaceInput{
NetworkInterfaceId: aws.String(d.Id()),
}
if _, err := conn.DeleteNetworkInterface(&deleteEniOpts); err != nil {
return fmt.Errorf("Error deleting ENI: %s", err)
}
return nil
}
func resourceAwsEniAttachmentHash(v interface{}) int {
var buf bytes.Buffer
m := v.(map[string]interface{})
buf.WriteString(fmt.Sprintf("%s-", m["instance"].(string)))
buf.WriteString(fmt.Sprintf("%d-", m["device_index"].(int)))
return hashcode.String(buf.String())
}