provider/aws elasticache parameter group

builtin/providers/aws/provider.go

@@ -97,6 +97,7 @@ func Provider() terraform.ResourceProvider {
 			"aws_ecs_task_definition":          resourceAwsEcsTaskDefinition(),
 			"aws_eip":                          resourceAwsEip(),
 			"aws_elasticache_cluster":          resourceAwsElasticacheCluster(),
+			"aws_elasticache_parameter_group":  resourceAwsElasticacheParameterGroup(),
 			"aws_elasticache_security_group":   resourceAwsElasticacheSecurityGroup(),
 			"aws_elasticache_subnet_group":     resourceAwsElasticacheSubnetGroup(),
 			"aws_elb":                          resourceAwsElb(),

builtin/providers/aws/resource_aws_elasticache_parameter_group.go

@@ -0,0 +1,214 @@
+package aws
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/hashicorp/terraform/helper/hashcode"
+	"github.com/hashicorp/terraform/helper/resource"
+	"github.com/hashicorp/terraform/helper/schema"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/service/elasticache"
+)
+
+func resourceAwsElasticacheParameterGroup() *schema.Resource {
+	return &schema.Resource{
+		Create: resourceAwsElasticacheParameterGroupCreate,
+		Read:   resourceAwsElasticacheParameterGroupRead,
+		Update: resourceAwsElasticacheParameterGroupUpdate,
+		Delete: resourceAwsElasticacheParameterGroupDelete,
+		Schema: map[string]*schema.Schema{
+			"name": &schema.Schema{
+				Type:     schema.TypeString,
+				ForceNew: true,
+				Required: true,
+			},
+			"family": &schema.Schema{
+				Type:     schema.TypeString,
+				Required: true,
+				ForceNew: true,
+			},
+			"description": &schema.Schema{
+				Type:     schema.TypeString,
+				Required: true,
+				ForceNew: true,
+			},
+			"parameter": &schema.Schema{
+				Type:     schema.TypeSet,
+				Optional: true,
+				ForceNew: false,
+				Elem: &schema.Resource{
+					Schema: map[string]*schema.Schema{
+						"name": &schema.Schema{
+							Type:     schema.TypeString,
+							Required: true,
+						},
+						"value": &schema.Schema{
+							Type:     schema.TypeString,
+							Required: true,
+						},
+					},
+				},
+				Set: resourceAwsElasticacheParameterHash,
+			},
+		},
+	}
+}
+
+func resourceAwsElasticacheParameterGroupCreate(d *schema.ResourceData, meta interface{}) error {
+	conn := meta.(*AWSClient).elasticacheconn
+
+	createOpts := elasticache.CreateCacheParameterGroupInput{
+		CacheParameterGroupName:   aws.String(d.Get("name").(string)),
+		CacheParameterGroupFamily: aws.String(d.Get("family").(string)),
+		Description:            aws.String(d.Get("description").(string)),
+	}
+
+	log.Printf("[DEBUG] Create Cache Parameter Group: %#v", createOpts)
+	_, err := conn.CreateCacheParameterGroup(&createOpts)
+	if err != nil {
+		return fmt.Errorf("Error creating DB Parameter Group: %s", err)
+	}
+
+	d.Partial(true)
+	d.SetPartial("name")
+	d.SetPartial("family")
+	d.SetPartial("description")
+	d.Partial(false)
+
+	d.SetId(*createOpts.CacheParameterGroupName)
+	log.Printf("[INFO] Cache Parameter Group ID: %s", d.Id())
+
+	return resourceAwsElasticacheParameterGroupUpdate(d, meta)
+}
+
+func resourceAwsElasticacheParameterGroupRead(d *schema.ResourceData, meta interface{}) error {
+	conn := meta.(*AWSClient).elasticacheconn
+
+	describeOpts := elasticache.DescribeCacheParameterGroupsInput{
+		CacheParameterGroupName: aws.String(d.Id()),
+	}
+
+	describeResp, err := conn.DescribeCacheParameterGroups(&describeOpts)
+	if err != nil {
+		return err
+	}
+
+	if len(describeResp.CacheParameterGroups) != 1 ||
+		*describeResp.CacheParameterGroups[0].CacheParameterGroupName != d.Id() {
+		return fmt.Errorf("Unable to find Parameter Group: %#v", describeResp.CacheParameterGroups)
+	}
+
+	d.Set("name", describeResp.CacheParameterGroups[0].CacheParameterGroupName)
+	d.Set("family", describeResp.CacheParameterGroups[0].CacheParameterGroupFamily)
+	d.Set("description", describeResp.CacheParameterGroups[0].Description)
+
+	// Only include user customized parameters as there's hundreds of system/default ones
+	describeParametersOpts := elasticache.DescribeCacheParametersInput{
+		CacheParameterGroupName: aws.String(d.Id()),
+		Source:               aws.String("user"),
+	}
+
+	describeParametersResp, err := conn.DescribeCacheParameters(&describeParametersOpts)
+	if err != nil {
+		return err
+	}
+
+	d.Set("parameter", flattenElastiCacheParameters(describeParametersResp.Parameters))
+
+	return nil
+}
+
+func resourceAwsElasticacheParameterGroupUpdate(d *schema.ResourceData, meta interface{}) error {
+	conn := meta.(*AWSClient).elasticacheconn
+
+	d.Partial(true)
+
+	if d.HasChange("parameter") {
+		o, n := d.GetChange("parameter")
+		if o == nil {
+			o = new(schema.Set)
+		}
+		if n == nil {
+			n = new(schema.Set)
+		}
+
+		os := o.(*schema.Set)
+		ns := n.(*schema.Set)
+
+		// Expand the "parameter" set to aws-sdk-go compat []elasticacheconn.Parameter
+		parameters, err := expandElastiCacheParameters(ns.Difference(os).List())
+		if err != nil {
+			return err
+		}
+
+		if len(parameters) > 0 {
+			modifyOpts := elasticache.ModifyCacheParameterGroupInput{
+				CacheParameterGroupName: aws.String(d.Get("name").(string)),
+				ParameterNameValues:     parameters,
+			}
+
+			log.Printf("[DEBUG] Modify Cache Parameter Group: %#v", modifyOpts)
+			_, err = conn.ModifyCacheParameterGroup(&modifyOpts)
+			if err != nil {
+				return fmt.Errorf("Error modifying Cache Parameter Group: %s", err)
+			}
+		}
+		d.SetPartial("parameter")
+	}
+
+	d.Partial(false)
+
+	return resourceAwsElasticacheParameterGroupRead(d, meta)
+}
+
+func resourceAwsElasticacheParameterGroupDelete(d *schema.ResourceData, meta interface{}) error {
+	stateConf := &resource.StateChangeConf{
+		Pending:    []string{"pending"},
+		Target:     "destroyed",
+		Refresh:    resourceAwsElasticacheParameterGroupDeleteRefreshFunc(d, meta),
+		Timeout:    3 * time.Minute,
+		MinTimeout: 1 * time.Second,
+	}
+	_, err := stateConf.WaitForState()
+	return err
+}
+
+func resourceAwsElasticacheParameterGroupDeleteRefreshFunc(
+	d *schema.ResourceData,
+	meta interface{}) resource.StateRefreshFunc {
+	conn := meta.(*AWSClient).elasticacheconn
+
+	return func() (interface{}, string, error) {
+
+		deleteOpts := elasticache.DeleteCacheParameterGroupInput{
+			CacheParameterGroupName: aws.String(d.Id()),
+		}
+
+		if _, err := conn.DeleteCacheParameterGroup(&deleteOpts); err != nil {
+			elasticahceerr, ok := err.(awserr.Error)
+			if !ok {
+				return d, "error", err
+			}
+
+			if elasticahceerr.Code() != "CacheParameterGroupNotFoundFault" {
+				return d, "error", err
+			}
+		}
+
+		return d, "destroyed", nil
+	}
+}
+
+func resourceAwsElasticacheParameterHash(v interface{}) int {
+	var buf bytes.Buffer
+	m := v.(map[string]interface{})
+	buf.WriteString(fmt.Sprintf("%s-", m["name"].(string)))
+	buf.WriteString(fmt.Sprintf("%s-", m["value"].(string)))
+
+	return hashcode.String(buf.String())
+}