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resource_aws_db_subnet_group.go
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resource_aws_db_subnet_group.go
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package aws
import (
"fmt"
"log"
"regexp"
"strings"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/rds"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceAwsDbSubnetGroup() *schema.Resource {
return &schema.Resource{
Create: resourceAwsDbSubnetGroupCreate,
Read: resourceAwsDbSubnetGroupRead,
Update: resourceAwsDbSubnetGroupUpdate,
Delete: resourceAwsDbSubnetGroupDelete,
Importer: &schema.ResourceImporter{
State: schema.ImportStatePassthrough,
},
Schema: map[string]*schema.Schema{
"arn": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
"name": &schema.Schema{
Type: schema.TypeString,
ForceNew: true,
Required: true,
ValidateFunc: validateSubnetGroupName,
},
"description": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: "Managed by Terraform",
},
"subnet_ids": &schema.Schema{
Type: schema.TypeSet,
Required: true,
Elem: &schema.Schema{Type: schema.TypeString},
Set: schema.HashString,
},
"tags": tagsSchema(),
},
}
}
func resourceAwsDbSubnetGroupCreate(d *schema.ResourceData, meta interface{}) error {
rdsconn := meta.(*AWSClient).rdsconn
tags := tagsFromMapRDS(d.Get("tags").(map[string]interface{}))
subnetIdsSet := d.Get("subnet_ids").(*schema.Set)
subnetIds := make([]*string, subnetIdsSet.Len())
for i, subnetId := range subnetIdsSet.List() {
subnetIds[i] = aws.String(subnetId.(string))
}
createOpts := rds.CreateDBSubnetGroupInput{
DBSubnetGroupName: aws.String(d.Get("name").(string)),
DBSubnetGroupDescription: aws.String(d.Get("description").(string)),
SubnetIds: subnetIds,
Tags: tags,
}
log.Printf("[DEBUG] Create DB Subnet Group: %#v", createOpts)
_, err := rdsconn.CreateDBSubnetGroup(&createOpts)
if err != nil {
return fmt.Errorf("Error creating DB Subnet Group: %s", err)
}
d.SetId(*createOpts.DBSubnetGroupName)
log.Printf("[INFO] DB Subnet Group ID: %s", d.Id())
return resourceAwsDbSubnetGroupRead(d, meta)
}
func resourceAwsDbSubnetGroupRead(d *schema.ResourceData, meta interface{}) error {
rdsconn := meta.(*AWSClient).rdsconn
describeOpts := rds.DescribeDBSubnetGroupsInput{
DBSubnetGroupName: aws.String(d.Id()),
}
describeResp, err := rdsconn.DescribeDBSubnetGroups(&describeOpts)
if err != nil {
if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "DBSubnetGroupNotFoundFault" {
// Update state to indicate the db subnet no longer exists.
d.SetId("")
return nil
}
return err
}
if len(describeResp.DBSubnetGroups) == 0 {
return fmt.Errorf("Unable to find DB Subnet Group: %#v", describeResp.DBSubnetGroups)
}
var subnetGroup *rds.DBSubnetGroup
for _, s := range describeResp.DBSubnetGroups {
// AWS is down casing the name provided, so we compare lower case versions
// of the names. We lower case both our name and their name in the check,
// incase they change that someday.
if strings.ToLower(d.Id()) == strings.ToLower(*s.DBSubnetGroupName) {
subnetGroup = describeResp.DBSubnetGroups[0]
}
}
if subnetGroup.DBSubnetGroupName == nil {
return fmt.Errorf("Unable to find DB Subnet Group: %#v", describeResp.DBSubnetGroups)
}
d.Set("name", subnetGroup.DBSubnetGroupName)
d.Set("description", subnetGroup.DBSubnetGroupDescription)
subnets := make([]string, 0, len(subnetGroup.Subnets))
for _, s := range subnetGroup.Subnets {
subnets = append(subnets, *s.SubnetIdentifier)
}
d.Set("subnet_ids", subnets)
// list tags for resource
// set tags
conn := meta.(*AWSClient).rdsconn
arn, err := buildRDSsubgrpARN(d.Id(), meta.(*AWSClient).accountid, meta.(*AWSClient).region)
if err != nil {
log.Printf("[DEBUG] Error building ARN for DB Subnet Group, not setting Tags for group %s", *subnetGroup.DBSubnetGroupName)
} else {
d.Set("arn", arn)
resp, err := conn.ListTagsForResource(&rds.ListTagsForResourceInput{
ResourceName: aws.String(arn),
})
if err != nil {
log.Printf("[DEBUG] Error retreiving tags for ARN: %s", arn)
}
var dt []*rds.Tag
if len(resp.TagList) > 0 {
dt = resp.TagList
}
d.Set("tags", tagsToMapRDS(dt))
}
return nil
}
func resourceAwsDbSubnetGroupUpdate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).rdsconn
if d.HasChange("subnet_ids") || d.HasChange("description") {
_, n := d.GetChange("subnet_ids")
if n == nil {
n = new(schema.Set)
}
ns := n.(*schema.Set)
var sIds []*string
for _, s := range ns.List() {
sIds = append(sIds, aws.String(s.(string)))
}
_, err := conn.ModifyDBSubnetGroup(&rds.ModifyDBSubnetGroupInput{
DBSubnetGroupName: aws.String(d.Id()),
DBSubnetGroupDescription: aws.String(d.Get("description").(string)),
SubnetIds: sIds,
})
if err != nil {
return err
}
}
if arn, err := buildRDSsubgrpARN(d.Id(), meta.(*AWSClient).accountid, meta.(*AWSClient).region); err == nil {
if err := setTagsRDS(conn, d, arn); err != nil {
return err
} else {
d.SetPartial("tags")
}
}
return resourceAwsDbSubnetGroupRead(d, meta)
}
func resourceAwsDbSubnetGroupDelete(d *schema.ResourceData, meta interface{}) error {
stateConf := &resource.StateChangeConf{
Pending: []string{"pending"},
Target: []string{"destroyed"},
Refresh: resourceAwsDbSubnetGroupDeleteRefreshFunc(d, meta),
Timeout: 3 * time.Minute,
MinTimeout: 1 * time.Second,
}
_, err := stateConf.WaitForState()
return err
}
func resourceAwsDbSubnetGroupDeleteRefreshFunc(
d *schema.ResourceData,
meta interface{}) resource.StateRefreshFunc {
rdsconn := meta.(*AWSClient).rdsconn
return func() (interface{}, string, error) {
deleteOpts := rds.DeleteDBSubnetGroupInput{
DBSubnetGroupName: aws.String(d.Id()),
}
if _, err := rdsconn.DeleteDBSubnetGroup(&deleteOpts); err != nil {
rdserr, ok := err.(awserr.Error)
if !ok {
return d, "error", err
}
if rdserr.Code() != "DBSubnetGroupNotFoundFault" {
return d, "error", err
}
}
return d, "destroyed", nil
}
}
func buildRDSsubgrpARN(identifier, accountid, region string) (string, error) {
if accountid == "" {
return "", fmt.Errorf("Unable to construct RDS ARN because of missing AWS Account ID")
}
arn := fmt.Sprintf("arn:aws:rds:%s:%s:subgrp:%s", region, accountid, identifier)
return arn, nil
}
func validateSubnetGroupName(v interface{}, k string) (ws []string, errors []error) {
value := v.(string)
if !regexp.MustCompile(`^[ .0-9a-z-_]+$`).MatchString(value) {
errors = append(errors, fmt.Errorf(
"only lowercase alphanumeric characters, hyphens, underscores, periods, and spaces allowed in %q", k))
}
if len(value) > 255 {
errors = append(errors, fmt.Errorf(
"%q cannot be longer than 255 characters", k))
}
if regexp.MustCompile(`(?i)^default$`).MatchString(value) {
errors = append(errors, fmt.Errorf(
"%q is not allowed as %q", "Default", k))
}
return
}