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resource_aws_appautoscaling_policy.go
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resource_aws_appautoscaling_policy.go
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package aws
import (
"bytes"
"fmt"
"log"
"strconv"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/applicationautoscaling"
"github.com/hashicorp/terraform/helper/hashcode"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceAwsAppautoscalingPolicy() *schema.Resource {
return &schema.Resource{
Create: resourceAwsAppautoscalingPolicyCreate,
Read: resourceAwsAppautoscalingPolicyRead,
Update: resourceAwsAppautoscalingPolicyUpdate,
Delete: resourceAwsAppautoscalingPolicyDelete,
Schema: map[string]*schema.Schema{
"name": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
ValidateFunc: func(v interface{}, k string) (ws []string, errors []error) {
// https://github.com/boto/botocore/blob/9f322b1/botocore/data/autoscaling/2011-01-01/service-2.json#L1862-L1873
value := v.(string)
if len(value) > 255 {
errors = append(errors, fmt.Errorf("%s cannot be longer than 255 characters", k))
}
return
},
},
"arn": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
"policy_type": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: "StepScaling",
},
"resource_id": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"scalable_dimension": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: "ecs:service:DesiredCount",
ForceNew: true,
},
"service_namespace": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: "ecs",
ForceNew: true,
},
"adjustment_type": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"cooldown": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
"metric_aggregation_type": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"min_adjustment_magnitude": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
},
"alarms": &schema.Schema{
Type: schema.TypeList,
Optional: true,
ForceNew: true,
Elem: &schema.Schema{Type: schema.TypeString},
},
"step_adjustment": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"metric_interval_lower_bound": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
"metric_interval_upper_bound": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
"scaling_adjustment": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
},
},
Set: resourceAwsAppautoscalingAdjustmentHash,
},
},
}
}
func resourceAwsAppautoscalingPolicyCreate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).appautoscalingconn
params, err := getAwsAppautoscalingPutScalingPolicyInput(d)
if err != nil {
return err
}
log.Printf("[DEBUG] ApplicationAutoScaling PutScalingPolicy: %#v", params)
resp, err := conn.PutScalingPolicy(¶ms)
if err != nil {
return fmt.Errorf("Error putting scaling policy: %s", err)
}
d.Set("arn", resp.PolicyARN)
d.SetId(d.Get("name").(string))
log.Printf("[INFO] ApplicationAutoScaling scaling PolicyARN: %s", d.Get("arn").(string))
return resourceAwsAppautoscalingPolicyRead(d, meta)
}
func resourceAwsAppautoscalingPolicyRead(d *schema.ResourceData, meta interface{}) error {
p, err := getAwsAppautoscalingPolicy(d, meta)
if err != nil {
return err
}
if p == nil {
d.SetId("")
return nil
}
log.Printf("[DEBUG] Read ApplicationAutoScaling policy: %s, SP: %s, Obj: %s", d.Get("name"), d.Get("name"), p)
d.Set("arn", p.PolicyARN)
d.Set("name", p.PolicyName)
d.Set("policy_type", p.PolicyType)
d.Set("resource_id", p.ResourceId)
d.Set("scalable_dimension", p.ScalableDimension)
d.Set("service_namespace", p.ServiceNamespace)
d.Set("alarms", p.Alarms)
d.Set("step_scaling_policy_configuration", p.StepScalingPolicyConfiguration)
return nil
}
func resourceAwsAppautoscalingPolicyUpdate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).appautoscalingconn
params, inputErr := getAwsAppautoscalingPutScalingPolicyInput(d)
if inputErr != nil {
return inputErr
}
log.Printf("[DEBUG] Application Autoscaling Update Scaling Policy: %#v", params)
_, err := conn.PutScalingPolicy(¶ms)
if err != nil {
return err
}
return resourceAwsAppautoscalingPolicyRead(d, meta)
}
func resourceAwsAppautoscalingPolicyDelete(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).appautoscalingconn
p, err := getAwsAppautoscalingPolicy(d, meta)
if err != nil {
return fmt.Errorf("Error getting policy: %s", err)
}
if p == nil {
return nil
}
params := applicationautoscaling.DeleteScalingPolicyInput{
PolicyName: aws.String(d.Get("name").(string)),
ResourceId: aws.String(d.Get("resource_id").(string)),
ScalableDimension: aws.String(d.Get("scalable_dimension").(string)),
ServiceNamespace: aws.String(d.Get("service_namespace").(string)),
}
log.Printf("[DEBUG] Deleting Application AutoScaling Policy opts: %#v", params)
if _, err := conn.DeleteScalingPolicy(¶ms); err != nil {
return fmt.Errorf("Application AutoScaling Policy: %s", err)
}
d.SetId("")
return nil
}
// Takes the result of flatmap.Expand for an array of step adjustments and
// returns a []*applicationautoscaling.StepAdjustment.
func expandAppautoscalingStepAdjustments(configured []interface{}) ([]*applicationautoscaling.StepAdjustment, error) {
var adjustments []*applicationautoscaling.StepAdjustment
// Loop over our configured step adjustments and create an array
// of aws-sdk-go compatible objects. We're forced to convert strings
// to floats here because there's no way to detect whether or not
// an uninitialized, optional schema element is "0.0" deliberately.
// With strings, we can test for "", which is definitely an empty
// struct value.
for _, raw := range configured {
data := raw.(map[string]interface{})
a := &applicationautoscaling.StepAdjustment{
ScalingAdjustment: aws.Int64(int64(data["scaling_adjustment"].(int))),
}
if data["metric_interval_lower_bound"] != "" {
bound := data["metric_interval_lower_bound"]
switch bound := bound.(type) {
case string:
f, err := strconv.ParseFloat(bound, 64)
if err != nil {
return nil, fmt.Errorf(
"metric_interval_lower_bound must be a float value represented as a string")
}
a.MetricIntervalLowerBound = aws.Float64(f)
default:
return nil, fmt.Errorf(
"metric_interval_lower_bound isn't a string. This is a bug. Please file an issue.")
}
}
if data["metric_interval_upper_bound"] != "" {
bound := data["metric_interval_upper_bound"]
switch bound := bound.(type) {
case string:
f, err := strconv.ParseFloat(bound, 64)
if err != nil {
return nil, fmt.Errorf(
"metric_interval_upper_bound must be a float value represented as a string")
}
a.MetricIntervalUpperBound = aws.Float64(f)
default:
return nil, fmt.Errorf(
"metric_interval_upper_bound isn't a string. This is a bug. Please file an issue.")
}
}
adjustments = append(adjustments, a)
}
return adjustments, nil
}
func getAwsAppautoscalingPutScalingPolicyInput(d *schema.ResourceData) (applicationautoscaling.PutScalingPolicyInput, error) {
var params = applicationautoscaling.PutScalingPolicyInput{
PolicyName: aws.String(d.Get("name").(string)),
ResourceId: aws.String(d.Get("resource_id").(string)),
}
if v, ok := d.GetOk("policy_type"); ok {
params.PolicyType = aws.String(v.(string))
}
if v, ok := d.GetOk("service_namespace"); ok {
params.ServiceNamespace = aws.String(v.(string))
}
if v, ok := d.GetOk("policy_type"); ok {
params.PolicyType = aws.String(v.(string))
}
if v, ok := d.GetOk("scalable_dimension"); ok {
params.ScalableDimension = aws.String(v.(string))
}
var adjustmentSteps []*applicationautoscaling.StepAdjustment
if v, ok := d.GetOk("step_adjustment"); ok {
steps, err := expandAppautoscalingStepAdjustments(v.(*schema.Set).List())
if err != nil {
return params, fmt.Errorf("metric_interval_lower_bound and metric_interval_upper_bound must be strings!")
}
adjustmentSteps = steps
}
// build StepScalingPolicyConfiguration
params.StepScalingPolicyConfiguration = &applicationautoscaling.StepScalingPolicyConfiguration{
AdjustmentType: aws.String(d.Get("adjustment_type").(string)),
Cooldown: aws.Int64(int64(d.Get("cooldown").(int))),
MetricAggregationType: aws.String(d.Get("metric_aggregation_type").(string)),
StepAdjustments: adjustmentSteps,
}
if v, ok := d.GetOk("min_adjustment_magnitude"); ok {
params.StepScalingPolicyConfiguration.MinAdjustmentMagnitude = aws.Int64(int64(v.(int)))
}
return params, nil
}
func getAwsAppautoscalingPolicy(d *schema.ResourceData, meta interface{}) (*applicationautoscaling.ScalingPolicy, error) {
conn := meta.(*AWSClient).appautoscalingconn
params := applicationautoscaling.DescribeScalingPoliciesInput{
PolicyNames: []*string{aws.String(d.Get("name").(string))},
ServiceNamespace: aws.String(d.Get("service_namespace").(string)),
}
log.Printf("[DEBUG] Application AutoScaling Policy Describe Params: %#v", params)
resp, err := conn.DescribeScalingPolicies(¶ms)
if err != nil {
return nil, fmt.Errorf("Error retrieving scaling policies: %s", err)
}
// find scaling policy
name := d.Get("name")
for idx, sp := range resp.ScalingPolicies {
if *sp.PolicyName == name {
return resp.ScalingPolicies[idx], nil
}
}
// policy not found
return nil, nil
}
func resourceAwsAppautoscalingAdjustmentHash(v interface{}) int {
var buf bytes.Buffer
m := v.(map[string]interface{})
if v, ok := m["metric_interval_lower_bound"]; ok {
buf.WriteString(fmt.Sprintf("%f-", v))
}
if v, ok := m["metric_interval_upper_bound"]; ok {
buf.WriteString(fmt.Sprintf("%f-", v))
}
buf.WriteString(fmt.Sprintf("%d-", m["scaling_adjustment"].(int)))
return hashcode.String(buf.String())
}