terraform/builtin/providers/aws/resource_aws_elasticache_su...

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package aws
import (
"fmt"
"log"
"strings"
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"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/elasticache"
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"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceAwsElasticacheSubnetGroup() *schema.Resource {
return &schema.Resource{
Create: resourceAwsElasticacheSubnetGroupCreate,
Read: resourceAwsElasticacheSubnetGroupRead,
Update: resourceAwsElasticacheSubnetGroupUpdate,
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Delete: resourceAwsElasticacheSubnetGroupDelete,
Schema: map[string]*schema.Schema{
"description": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"name": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
StateFunc: func(val interface{}) string {
// Elasticache normalizes subnet names to lowercase,
// so we have to do this too or else we can end up
// with non-converging diffs.
return strings.ToLower(val.(string))
},
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},
"subnet_ids": &schema.Schema{
Type: schema.TypeSet,
Required: true,
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Elem: &schema.Schema{Type: schema.TypeString},
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Set: schema.HashString,
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},
},
}
}
func resourceAwsElasticacheSubnetGroupCreate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).elasticacheconn
// Get the group properties
name := d.Get("name").(string)
desc := d.Get("description").(string)
subnetIdsSet := d.Get("subnet_ids").(*schema.Set)
log.Printf("[DEBUG] Cache subnet group create: name: %s, description: %s", name, desc)
subnetIds := expandStringList(subnetIdsSet.List())
req := &elasticache.CreateCacheSubnetGroupInput{
CacheSubnetGroupDescription: aws.String(desc),
CacheSubnetGroupName: aws.String(name),
SubnetIds: subnetIds,
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}
_, err := conn.CreateCacheSubnetGroup(req)
if err != nil {
return fmt.Errorf("Error creating CacheSubnetGroup: %s", err)
}
// Assign the group name as the resource ID
// Elasticache always retains the name in lower case, so we have to
// mimic that or else we won't be able to refresh a resource whose
// name contained uppercase characters.
d.SetId(strings.ToLower(name))
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return nil
}
func resourceAwsElasticacheSubnetGroupRead(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).elasticacheconn
req := &elasticache.DescribeCacheSubnetGroupsInput{
CacheSubnetGroupName: aws.String(d.Get("name").(string)),
}
res, err := conn.DescribeCacheSubnetGroups(req)
if err != nil {
return err
}
if len(res.CacheSubnetGroups) == 0 {
return fmt.Errorf("Error missing %v", d.Get("name"))
}
var group *elasticache.CacheSubnetGroup
for _, g := range res.CacheSubnetGroups {
log.Printf("[DEBUG] %v %v", g.CacheSubnetGroupName, d.Id())
if *g.CacheSubnetGroupName == d.Id() {
group = g
}
}
if group == nil {
return fmt.Errorf("Error retrieving cache subnet group: %v", res)
}
ids := make([]string, len(group.Subnets))
for i, s := range group.Subnets {
ids[i] = *s.SubnetIdentifier
}
d.Set("name", group.CacheSubnetGroupName)
d.Set("description", group.CacheSubnetGroupDescription)
d.Set("subnet_ids", ids)
return nil
}
func resourceAwsElasticacheSubnetGroupUpdate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).elasticacheconn
if d.HasChange("subnet_ids") || d.HasChange("description") {
var subnets []*string
if v := d.Get("subnet_ids"); v != nil {
for _, v := range v.(*schema.Set).List() {
subnets = append(subnets, aws.String(v.(string)))
}
}
log.Printf("[DEBUG] Updating ElastiCache Subnet Group")
_, err := conn.ModifyCacheSubnetGroup(&elasticache.ModifyCacheSubnetGroupInput{
CacheSubnetGroupName: aws.String(d.Get("name").(string)),
CacheSubnetGroupDescription: aws.String(d.Get("description").(string)),
SubnetIds: subnets,
})
if err != nil {
return err
}
}
return resourceAwsElasticacheSubnetGroupRead(d, meta)
}
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func resourceAwsElasticacheSubnetGroupDelete(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).elasticacheconn
log.Printf("[DEBUG] Cache subnet group delete: %s", d.Id())
return resource.Retry(5*time.Minute, func() error {
_, err := conn.DeleteCacheSubnetGroup(&elasticache.DeleteCacheSubnetGroupInput{
CacheSubnetGroupName: aws.String(d.Id()),
})
if err != nil {
apierr, ok := err.(awserr.Error)
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if !ok {
return err
}
log.Printf("[DEBUG] APIError.Code: %v", apierr.Code)
switch apierr.Code() {
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case "DependencyViolation":
// If it is a dependency violation, we want to retry
return err
default:
return resource.RetryError{Err: err}
}
}
return nil
})
}