aws: Add support for aws_lb_cookie_stickiness_policy.

This resource represents a session stickiness policy in AWS, and can be
applied to an ELB's client-facing listeners.

builtin/providers/aws/provider.go

@@ -86,6 +86,7 @@ func Provider() terraform.ResourceProvider {
 			"aws_internet_gateway":             resourceAwsInternetGateway(),
 			"aws_key_pair":                     resourceAwsKeyPair(),
 			"aws_launch_configuration":         resourceAwsLaunchConfiguration(),
+			"aws_lb_cookie_stickiness_policy":  resourceAwsLBCookieStickinessPolicy(),
 			"aws_main_route_table_association": resourceAwsMainRouteTableAssociation(),
 			"aws_network_acl":                  resourceAwsNetworkAcl(),
 			"aws_network_interface":            resourceAwsNetworkInterface(),

builtin/providers/aws/resource_aws_lb_cookie_stickiness_policy.go

@@ -0,0 +1,156 @@
+package aws
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/awslabs/aws-sdk-go/aws"
+	"github.com/awslabs/aws-sdk-go/service/elb"
+	"github.com/hashicorp/terraform/helper/schema"
+)
+
+func resourceAwsLBCookieStickinessPolicy() *schema.Resource {
+	return &schema.Resource{
+		// There is no concept of "updating" an LB Stickiness policy in
+		// the AWS API.
+		Create: resourceAwsLBCookieStickinessPolicyCreate,
+		Update: resourceAwsLBCookieStickinessPolicyCreate,
+
+		Read:   resourceAwsLBCookieStickinessPolicyRead,
+		Delete: resourceAwsLBCookieStickinessPolicyDelete,
+
+		Schema: map[string]*schema.Schema{
+			"name": &schema.Schema{
+				Type:     schema.TypeString,
+				Required: true,
+				ForceNew: true,
+			},
+
+			"load_balancer": &schema.Schema{
+				Type:     schema.TypeString,
+				Required: true,
+				ForceNew: true,
+			},
+
+			"lb_port": &schema.Schema{
+				Type:     schema.TypeInt,
+				Required: true,
+				ForceNew: true,
+			},
+
+			"cookie_expiration_period": &schema.Schema{
+				Type:     schema.TypeInt,
+				Optional: true,
+				ForceNew: true,
+			},
+		},
+	}
+}
+
+func resourceAwsLBCookieStickinessPolicyCreate(d *schema.ResourceData, meta interface{}) error {
+	elbconn := meta.(*AWSClient).elbconn
+
+	// Provision the LBStickinessPolicy
+	lbspOpts := &elb.CreateLBCookieStickinessPolicyInput{
+		CookieExpirationPeriod: aws.Long(int64(d.Get("cookie_expiration_period").(int))),
+		LoadBalancerName:       aws.String(d.Get("load_balancer").(string)),
+		PolicyName:             aws.String(d.Get("name").(string)),
+	}
+
+	if _, err := elbconn.CreateLBCookieStickinessPolicy(lbspOpts); err != nil {
+		return fmt.Errorf("Error creating LBCookieStickinessPolicy: %s", err)
+	}
+
+	setLoadBalancerOpts := &elb.SetLoadBalancerPoliciesOfListenerInput{
+		LoadBalancerName: aws.String(d.Get("load_balancer").(string)),
+		LoadBalancerPort: aws.Long(int64(d.Get("lb_port").(int))),
+		PolicyNames:      []*string{aws.String(d.Get("name").(string))},
+	}
+
+	if _, err := elbconn.SetLoadBalancerPoliciesOfListener(setLoadBalancerOpts); err != nil {
+		return fmt.Errorf("Error setting LBCookieStickinessPolicy: %s", err)
+	}
+
+	d.SetId(fmt.Sprintf("%s:%d:%s",
+		*lbspOpts.LoadBalancerName,
+		*setLoadBalancerOpts.LoadBalancerPort,
+		*lbspOpts.PolicyName))
+	return nil
+}
+
+func resourceAwsLBCookieStickinessPolicyRead(d *schema.ResourceData, meta interface{}) error {
+	elbconn := meta.(*AWSClient).elbconn
+
+	lbName, lbPort, policyName := resourceAwsLBCookieStickinessPolicyParseId(d.Id())
+
+	request := &elb.DescribeLoadBalancerPoliciesInput{
+		LoadBalancerName: aws.String(lbName),
+		PolicyNames:      []*string{aws.String(policyName)},
+	}
+
+	getResp, err := elbconn.DescribeLoadBalancerPolicies(request)
+	if err != nil {
+		if ec2err, ok := err.(aws.APIError); ok && ec2err.Code == "PolicyNotFound" {
+			// The policy is gone.
+			d.SetId("")
+			return nil
+		}
+		return fmt.Errorf("Error retrieving policy: %s", err)
+	}
+
+	if len(getResp.PolicyDescriptions) != 1 {
+		return fmt.Errorf("Unable to find policy %#v", getResp.PolicyDescriptions)
+	}
+
+	// We can get away with this because there's only one attribute, the
+	// cookie expiration, in these descriptions.
+	policyDesc := getResp.PolicyDescriptions[0]
+	cookieAttr := policyDesc.PolicyAttributeDescriptions[0]
+	if *cookieAttr.AttributeName != "CookieExpirationPeriod" {
+		return fmt.Errorf("Unable to find cookie expiration period.")
+	}
+	d.Set("cookie_expiration_period", cookieAttr.AttributeValue)
+
+	d.Set("name", policyName)
+	d.Set("load_balancer", lbName)
+	d.Set("lb_port", lbPort)
+
+	return nil
+}
+
+func resourceAwsLBCookieStickinessPolicyDelete(d *schema.ResourceData, meta interface{}) error {
+	elbconn := meta.(*AWSClient).elbconn
+
+	lbName, _, policyName := resourceAwsLBCookieStickinessPolicyParseId(d.Id())
+
+	// Perversely, if we Set an empty list of PolicyNames, we detach the
+	// policies attached to a listener, which is required to delete the
+	// policy itself.
+	setLoadBalancerOpts := &elb.SetLoadBalancerPoliciesOfListenerInput{
+		LoadBalancerName: aws.String(d.Get("load_balancer").(string)),
+		LoadBalancerPort: aws.Long(int64(d.Get("lb_port").(int))),
+		PolicyNames:      []*string{},
+	}
+
+	if _, err := elbconn.SetLoadBalancerPoliciesOfListener(setLoadBalancerOpts); err != nil {
+		return fmt.Errorf("Error removing LBCookieStickinessPolicy: %s", err)
+	}
+
+	request := &elb.DeleteLoadBalancerPolicyInput{
+		LoadBalancerName: aws.String(lbName),
+		PolicyName:       aws.String(policyName),
+	}
+
+	if _, err := elbconn.DeleteLoadBalancerPolicy(request); err != nil {
+		return fmt.Errorf("Error deleting LB stickiness policy %s: %s", d.Id(), err)
+	}
+	return nil
+}
+
+// resourceAwsLBCookieStickinessPolicyParseId takes an ID and parses it into
+// it's constituent parts. You need three axes (LB name, policy name, and LB
+// port) to create or identify a stickiness policy in AWS's API.
+func resourceAwsLBCookieStickinessPolicyParseId(id string) (string, string, string) {
+	parts := strings.SplitN(id, ":", 3)
+	return parts[0], parts[1], parts[2]
+}