terraform/builtin/providers/aws/resource_aws_autoscaling_po...

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package aws
import (
"bytes"
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"fmt"
"log"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/service/autoscaling"
"github.com/hashicorp/terraform/helper/hashcode"
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"github.com/hashicorp/terraform/helper/schema"
)
func resourceAwsAutoscalingPolicy() *schema.Resource {
return &schema.Resource{
Create: resourceAwsAutoscalingPolicyCreate,
Read: resourceAwsAutoscalingPolicyRead,
Update: resourceAwsAutoscalingPolicyUpdate,
Delete: resourceAwsAutoscalingPolicyDelete,
Schema: map[string]*schema.Schema{
"arn": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
"name": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"adjustment_type": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"autoscaling_group_name": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"policy_type": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: "SimpleScaling", // preserve AWS's default to make validation easier.
},
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"cooldown": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
},
"estimated_instance_warmup": &schema.Schema{
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Type: schema.TypeInt,
Optional: true,
},
"metric_aggregation_type": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
"min_adjustment_magnitude": &schema.Schema{
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Type: schema.TypeInt,
Optional: true,
},
"min_adjustment_step": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
Deprecated: "Use min_adjustment_magnitude instead, otherwise you may see a perpetual diff on this resource.",
ConflictsWith: []string{"min_adjustment_magnitude"},
},
"scaling_adjustment": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
ConflictsWith: []string{"step_adjustment"},
},
"step_adjustment": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
ConflictsWith: []string{"scaling_adjustment"},
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: resourceAwsAutoscalingScalingAdjustmentHash,
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},
},
}
}
func resourceAwsAutoscalingPolicyCreate(d *schema.ResourceData, meta interface{}) error {
autoscalingconn := meta.(*AWSClient).autoscalingconn
params, err := getAwsAutoscalingPutScalingPolicyInput(d)
if err != nil {
return err
}
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log.Printf("[DEBUG] AutoScaling PutScalingPolicy: %#v", params)
resp, err := autoscalingconn.PutScalingPolicy(&params)
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] AutoScaling Scaling PolicyARN: %s", d.Get("arn").(string))
return resourceAwsAutoscalingPolicyRead(d, meta)
}
func resourceAwsAutoscalingPolicyRead(d *schema.ResourceData, meta interface{}) error {
p, err := getAwsAutoscalingPolicy(d, meta)
if err != nil {
return err
}
if p == nil {
d.SetId("")
return nil
}
log.Printf("[DEBUG] Read Scaling Policy: ASG: %s, SP: %s, Obj: %s", d.Get("autoscaling_group_name"), d.Get("name"), p)
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d.Set("adjustment_type", p.AdjustmentType)
d.Set("autoscaling_group_name", p.AutoScalingGroupName)
d.Set("cooldown", p.Cooldown)
d.Set("estimated_instance_warmup", p.EstimatedInstanceWarmup)
d.Set("metric_aggregation_type", p.MetricAggregationType)
d.Set("policy_type", p.PolicyType)
if p.MinAdjustmentMagnitude != nil {
d.Set("min_adjustment_magnitude", p.MinAdjustmentMagnitude)
d.Set("min_adjustment_step", 0)
} else {
d.Set("min_adjustment_step", p.MinAdjustmentStep)
}
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d.Set("arn", p.PolicyARN)
d.Set("name", p.PolicyName)
d.Set("scaling_adjustment", p.ScalingAdjustment)
d.Set("step_adjustment", flattenStepAdjustments(p.StepAdjustments))
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return nil
}
func resourceAwsAutoscalingPolicyUpdate(d *schema.ResourceData, meta interface{}) error {
autoscalingconn := meta.(*AWSClient).autoscalingconn
params, inputErr := getAwsAutoscalingPutScalingPolicyInput(d)
if inputErr != nil {
return inputErr
}
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log.Printf("[DEBUG] Autoscaling Update Scaling Policy: %#v", params)
_, err := autoscalingconn.PutScalingPolicy(&params)
if err != nil {
return err
}
return resourceAwsAutoscalingPolicyRead(d, meta)
}
func resourceAwsAutoscalingPolicyDelete(d *schema.ResourceData, meta interface{}) error {
autoscalingconn := meta.(*AWSClient).autoscalingconn
p, err := getAwsAutoscalingPolicy(d, meta)
if err != nil {
return err
}
if p == nil {
return nil
}
params := autoscaling.DeletePolicyInput{
AutoScalingGroupName: aws.String(d.Get("autoscaling_group_name").(string)),
PolicyName: aws.String(d.Get("name").(string)),
}
log.Printf("[DEBUG] Deleting Autoscaling Policy opts: %s", params)
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if _, err := autoscalingconn.DeletePolicy(&params); err != nil {
return fmt.Errorf("Autoscaling Scaling Policy: %s ", err)
}
d.SetId("")
return nil
}
// PutScalingPolicy can safely resend all parameters without destroying the
// resource, so create and update can share this common function. It will error
// if certain mutually exclusive values are set.
func getAwsAutoscalingPutScalingPolicyInput(d *schema.ResourceData) (autoscaling.PutScalingPolicyInput, error) {
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var params = autoscaling.PutScalingPolicyInput{
AutoScalingGroupName: aws.String(d.Get("autoscaling_group_name").(string)),
PolicyName: aws.String(d.Get("name").(string)),
}
if v, ok := d.GetOk("adjustment_type"); ok {
params.AdjustmentType = aws.String(v.(string))
}
if v, ok := d.GetOk("cooldown"); ok {
params.Cooldown = aws.Int64(int64(v.(int)))
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}
if v, ok := d.GetOk("estimated_instance_warmup"); ok {
params.EstimatedInstanceWarmup = aws.Int64(int64(v.(int)))
}
if v, ok := d.GetOk("metric_aggregation_type"); ok {
params.MetricAggregationType = aws.String(v.(string))
}
if v, ok := d.GetOk("policy_type"); ok {
params.PolicyType = aws.String(v.(string))
}
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if v, ok := d.GetOk("scaling_adjustment"); ok {
params.ScalingAdjustment = aws.Int64(int64(v.(int)))
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}
if v, ok := d.GetOk("step_adjustment"); ok {
steps, err := expandStepAdjustments(v.(*schema.Set).List())
if err != nil {
return params, fmt.Errorf("metric_interval_lower_bound and metric_interval_upper_bound must be strings!")
}
params.StepAdjustments = steps
}
if v, ok := d.GetOk("min_adjustment_magnitude"); ok {
// params.MinAdjustmentMagnitude = aws.Int64(int64(d.Get("min_adjustment_magnitude").(int)))
params.MinAdjustmentMagnitude = aws.Int64(int64(v.(int)))
} else if v, ok := d.GetOk("min_adjustment_step"); ok {
// params.MinAdjustmentStep = aws.Int64(int64(d.Get("min_adjustment_step").(int)))
params.MinAdjustmentStep = aws.Int64(int64(v.(int)))
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}
// Validate our final input to confirm it won't error when sent to AWS.
// First, SimpleScaling policy types...
if *params.PolicyType == "SimpleScaling" && params.StepAdjustments != nil {
return params, fmt.Errorf("SimpleScaling policy types cannot use step_adjustments!")
}
if *params.PolicyType == "SimpleScaling" && params.MetricAggregationType != nil {
return params, fmt.Errorf("SimpleScaling policy types cannot use metric_aggregation_type!")
}
if *params.PolicyType == "SimpleScaling" && params.EstimatedInstanceWarmup != nil {
return params, fmt.Errorf("SimpleScaling policy types cannot use estimated_instance_warmup!")
}
// Second, StepScaling policy types...
if *params.PolicyType == "StepScaling" && params.ScalingAdjustment != nil {
return params, fmt.Errorf("StepScaling policy types cannot use scaling_adjustment!")
}
if *params.PolicyType == "StepScaling" && params.Cooldown != nil {
return params, fmt.Errorf("StepScaling policy types cannot use cooldown!")
}
return params, nil
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}
func getAwsAutoscalingPolicy(d *schema.ResourceData, meta interface{}) (*autoscaling.ScalingPolicy, error) {
autoscalingconn := meta.(*AWSClient).autoscalingconn
params := autoscaling.DescribePoliciesInput{
AutoScalingGroupName: aws.String(d.Get("autoscaling_group_name").(string)),
PolicyNames: []*string{aws.String(d.Get("name").(string))},
}
log.Printf("[DEBUG] AutoScaling Scaling Policy Describe Params: %#v", params)
resp, err := autoscalingconn.DescribePolicies(&params)
if err != nil {
//A ValidationError here can mean that either the Policy is missing OR the Autoscaling Group is missing
if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "ValidationError" {
log.Printf("[WARNING] %s not found, removing from state", d.Id())
d.SetId("")
return nil, nil
}
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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 resourceAwsAutoscalingScalingAdjustmentHash(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())
}