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resource_aws_route_table.go
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resource_aws_route_table.go
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package aws
import (
"bytes"
"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/hashcode"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceAwsRouteTable() *schema.Resource {
return &schema.Resource{
Create: resourceAwsRouteTableCreate,
Read: resourceAwsRouteTableRead,
Update: resourceAwsRouteTableUpdate,
Delete: resourceAwsRouteTableDelete,
Importer: &schema.ResourceImporter{
State: resourceAwsRouteTableImportState,
},
Schema: map[string]*schema.Schema{
"vpc_id": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"tags": tagsSchema(),
"propagating_vgws": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Elem: &schema.Schema{Type: schema.TypeString},
Set: schema.HashString,
},
"route": &schema.Schema{
Type: schema.TypeSet,
Computed: true,
Optional: true,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"cidr_block": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"gateway_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
"instance_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
"nat_gateway_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
"vpc_peering_connection_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
"network_interface_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
},
},
Set: resourceAwsRouteTableHash,
},
},
}
}
func resourceAwsRouteTableCreate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
// Create the routing table
createOpts := &ec2.CreateRouteTableInput{
VpcId: aws.String(d.Get("vpc_id").(string)),
}
log.Printf("[DEBUG] RouteTable create config: %#v", createOpts)
resp, err := conn.CreateRouteTable(createOpts)
if err != nil {
return fmt.Errorf("Error creating route table: %s", err)
}
// Get the ID and store it
rt := resp.RouteTable
d.SetId(*rt.RouteTableId)
log.Printf("[INFO] Route Table ID: %s", d.Id())
// Wait for the route table to become available
log.Printf(
"[DEBUG] Waiting for route table (%s) to become available",
d.Id())
stateConf := &resource.StateChangeConf{
Pending: []string{"pending"},
Target: []string{"ready"},
Refresh: resourceAwsRouteTableStateRefreshFunc(conn, d.Id()),
Timeout: 2 * time.Minute,
}
if _, err := stateConf.WaitForState(); err != nil {
return fmt.Errorf(
"Error waiting for route table (%s) to become available: %s",
d.Id(), err)
}
return resourceAwsRouteTableUpdate(d, meta)
}
func resourceAwsRouteTableRead(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
rtRaw, _, err := resourceAwsRouteTableStateRefreshFunc(conn, d.Id())()
if err != nil {
return err
}
if rtRaw == nil {
d.SetId("")
return nil
}
rt := rtRaw.(*ec2.RouteTable)
d.Set("vpc_id", rt.VpcId)
propagatingVGWs := make([]string, 0, len(rt.PropagatingVgws))
for _, vgw := range rt.PropagatingVgws {
propagatingVGWs = append(propagatingVGWs, *vgw.GatewayId)
}
d.Set("propagating_vgws", propagatingVGWs)
// Create an empty schema.Set to hold all routes
route := &schema.Set{F: resourceAwsRouteTableHash}
// Loop through the routes and add them to the set
for _, r := range rt.Routes {
if r.GatewayId != nil && *r.GatewayId == "local" {
continue
}
if r.Origin != nil && *r.Origin == "EnableVgwRoutePropagation" {
continue
}
if r.DestinationPrefixListId != nil {
// Skipping because VPC endpoint routes are handled separately
// See aws_vpc_endpoint
continue
}
m := make(map[string]interface{})
if r.DestinationCidrBlock != nil {
m["cidr_block"] = *r.DestinationCidrBlock
}
if r.GatewayId != nil {
m["gateway_id"] = *r.GatewayId
}
if r.NatGatewayId != nil {
m["nat_gateway_id"] = *r.NatGatewayId
}
if r.InstanceId != nil {
m["instance_id"] = *r.InstanceId
}
if r.VpcPeeringConnectionId != nil {
m["vpc_peering_connection_id"] = *r.VpcPeeringConnectionId
}
if r.NetworkInterfaceId != nil {
m["network_interface_id"] = *r.NetworkInterfaceId
}
route.Add(m)
}
d.Set("route", route)
// Tags
d.Set("tags", tagsToMap(rt.Tags))
return nil
}
func resourceAwsRouteTableUpdate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
if d.HasChange("propagating_vgws") {
o, n := d.GetChange("propagating_vgws")
os := o.(*schema.Set)
ns := n.(*schema.Set)
remove := os.Difference(ns).List()
add := ns.Difference(os).List()
// Now first loop through all the old propagations and disable any obsolete ones
for _, vgw := range remove {
id := vgw.(string)
// Disable the propagation as it no longer exists in the config
log.Printf(
"[INFO] Deleting VGW propagation from %s: %s",
d.Id(), id)
_, err := conn.DisableVgwRoutePropagation(&ec2.DisableVgwRoutePropagationInput{
RouteTableId: aws.String(d.Id()),
GatewayId: aws.String(id),
})
if err != nil {
return err
}
}
// Make sure we save the state of the currently configured rules
propagatingVGWs := os.Intersection(ns)
d.Set("propagating_vgws", propagatingVGWs)
// Then loop through all the newly configured propagations and enable them
for _, vgw := range add {
id := vgw.(string)
var err error
for i := 0; i < 5; i++ {
log.Printf("[INFO] Enabling VGW propagation for %s: %s", d.Id(), id)
_, err = conn.EnableVgwRoutePropagation(&ec2.EnableVgwRoutePropagationInput{
RouteTableId: aws.String(d.Id()),
GatewayId: aws.String(id),
})
if err == nil {
break
}
// If we get a Gateway.NotAttached, it is usually some
// eventually consistency stuff. So we have to just wait a
// bit...
ec2err, ok := err.(awserr.Error)
if ok && ec2err.Code() == "Gateway.NotAttached" {
time.Sleep(20 * time.Second)
continue
}
}
if err != nil {
return err
}
propagatingVGWs.Add(vgw)
d.Set("propagating_vgws", propagatingVGWs)
}
}
// Check if the route set as a whole has changed
if d.HasChange("route") {
o, n := d.GetChange("route")
ors := o.(*schema.Set).Difference(n.(*schema.Set))
nrs := n.(*schema.Set).Difference(o.(*schema.Set))
// Now first loop through all the old routes and delete any obsolete ones
for _, route := range ors.List() {
m := route.(map[string]interface{})
// Delete the route as it no longer exists in the config
log.Printf(
"[INFO] Deleting route from %s: %s",
d.Id(), m["cidr_block"].(string))
_, err := conn.DeleteRoute(&ec2.DeleteRouteInput{
RouteTableId: aws.String(d.Id()),
DestinationCidrBlock: aws.String(m["cidr_block"].(string)),
})
if err != nil {
return err
}
}
// Make sure we save the state of the currently configured rules
routes := o.(*schema.Set).Intersection(n.(*schema.Set))
d.Set("route", routes)
// Then loop through all the newly configured routes and create them
for _, route := range nrs.List() {
m := route.(map[string]interface{})
opts := ec2.CreateRouteInput{
RouteTableId: aws.String(d.Id()),
DestinationCidrBlock: aws.String(m["cidr_block"].(string)),
GatewayId: aws.String(m["gateway_id"].(string)),
InstanceId: aws.String(m["instance_id"].(string)),
VpcPeeringConnectionId: aws.String(m["vpc_peering_connection_id"].(string)),
NetworkInterfaceId: aws.String(m["network_interface_id"].(string)),
}
if m["nat_gateway_id"].(string) != "" {
opts.NatGatewayId = aws.String(m["nat_gateway_id"].(string))
}
log.Printf("[INFO] Creating route for %s: %#v", d.Id(), opts)
err := resource.Retry(1*time.Minute, func() *resource.RetryError {
_, err := conn.CreateRoute(&opts)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
if awsErr.Code() == "InvalidRouteTableID.NotFound" {
return resource.RetryableError(awsErr)
}
}
return resource.NonRetryableError(err)
}
return nil
})
if err != nil {
return err
}
routes.Add(route)
d.Set("route", routes)
}
}
if err := setTags(conn, d); err != nil {
return err
} else {
d.SetPartial("tags")
}
return resourceAwsRouteTableRead(d, meta)
}
func resourceAwsRouteTableDelete(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
// First request the routing table since we'll have to disassociate
// all the subnets first.
rtRaw, _, err := resourceAwsRouteTableStateRefreshFunc(conn, d.Id())()
if err != nil {
return err
}
if rtRaw == nil {
return nil
}
rt := rtRaw.(*ec2.RouteTable)
// Do all the disassociations
for _, a := range rt.Associations {
log.Printf("[INFO] Disassociating association: %s", *a.RouteTableAssociationId)
_, err := conn.DisassociateRouteTable(&ec2.DisassociateRouteTableInput{
AssociationId: a.RouteTableAssociationId,
})
if err != nil {
// First check if the association ID is not found. If this
// is the case, then it was already disassociated somehow,
// and that is okay.
if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "InvalidAssociationID.NotFound" {
err = nil
}
}
if err != nil {
return err
}
}
// Delete the route table
log.Printf("[INFO] Deleting Route Table: %s", d.Id())
_, err = conn.DeleteRouteTable(&ec2.DeleteRouteTableInput{
RouteTableId: aws.String(d.Id()),
})
if err != nil {
ec2err, ok := err.(awserr.Error)
if ok && ec2err.Code() == "InvalidRouteTableID.NotFound" {
return nil
}
return fmt.Errorf("Error deleting route table: %s", err)
}
// Wait for the route table to really destroy
log.Printf(
"[DEBUG] Waiting for route table (%s) to become destroyed",
d.Id())
stateConf := &resource.StateChangeConf{
Pending: []string{"ready"},
Target: []string{},
Refresh: resourceAwsRouteTableStateRefreshFunc(conn, d.Id()),
Timeout: 2 * time.Minute,
}
if _, err := stateConf.WaitForState(); err != nil {
return fmt.Errorf(
"Error waiting for route table (%s) to become destroyed: %s",
d.Id(), err)
}
return nil
}
func resourceAwsRouteTableHash(v interface{}) int {
var buf bytes.Buffer
m := v.(map[string]interface{})
if v, ok := m["cidr_block"]; ok {
buf.WriteString(fmt.Sprintf("%s-", v.(string)))
}
if v, ok := m["gateway_id"]; ok {
buf.WriteString(fmt.Sprintf("%s-", v.(string)))
}
natGatewaySet := false
if v, ok := m["nat_gateway_id"]; ok {
natGatewaySet = v.(string) != ""
buf.WriteString(fmt.Sprintf("%s-", v.(string)))
}
instanceSet := false
if v, ok := m["instance_id"]; ok {
instanceSet = v.(string) != ""
buf.WriteString(fmt.Sprintf("%s-", v.(string)))
}
if v, ok := m["vpc_peering_connection_id"]; ok {
buf.WriteString(fmt.Sprintf("%s-", v.(string)))
}
if v, ok := m["network_interface_id"]; ok && !(instanceSet || natGatewaySet) {
buf.WriteString(fmt.Sprintf("%s-", v.(string)))
}
return hashcode.String(buf.String())
}
// resourceAwsRouteTableStateRefreshFunc returns a resource.StateRefreshFunc that is used to watch
// a RouteTable.
func resourceAwsRouteTableStateRefreshFunc(conn *ec2.EC2, id string) resource.StateRefreshFunc {
return func() (interface{}, string, error) {
resp, err := conn.DescribeRouteTables(&ec2.DescribeRouteTablesInput{
RouteTableIds: []*string{aws.String(id)},
})
if err != nil {
if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "InvalidRouteTableID.NotFound" {
resp = nil
} else {
log.Printf("Error on RouteTableStateRefresh: %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
}
rt := resp.RouteTables[0]
return rt, "ready", nil
}
}