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resource_aws_lb_target_group_attachment.go
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resource_aws_lb_target_group_attachment.go
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package aws
import (
"fmt"
"log"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/elbv2"
"github.com/hashicorp/errwrap"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceAwsLbTargetGroupAttachment() *schema.Resource {
return &schema.Resource{
Create: resourceAwsLbAttachmentCreate,
Read: resourceAwsLbAttachmentRead,
Delete: resourceAwsLbAttachmentDelete,
Schema: map[string]*schema.Schema{
"target_group_arn": {
Type: schema.TypeString,
ForceNew: true,
Required: true,
},
"target_id": {
Type: schema.TypeString,
ForceNew: true,
Required: true,
},
"port": {
Type: schema.TypeInt,
ForceNew: true,
Optional: true,
},
"availability_zone": {
Type: schema.TypeString,
ForceNew: true,
Optional: true,
},
},
}
}
func resourceAwsLbAttachmentCreate(d *schema.ResourceData, meta interface{}) error {
elbconn := meta.(*AWSClient).elbv2conn
target := &elbv2.TargetDescription{
Id: aws.String(d.Get("target_id").(string)),
}
if v, ok := d.GetOk("port"); ok {
target.Port = aws.Int64(int64(v.(int)))
}
if v, ok := d.GetOk("availability_zone"); ok {
target.AvailabilityZone = aws.String(v.(string))
}
params := &elbv2.RegisterTargetsInput{
TargetGroupArn: aws.String(d.Get("target_group_arn").(string)),
Targets: []*elbv2.TargetDescription{target},
}
log.Printf("[INFO] Registering Target %s with Target Group %s", d.Get("target_id").(string),
d.Get("target_group_arn").(string))
_, err := elbconn.RegisterTargets(params)
if err != nil {
return errwrap.Wrapf("Error registering targets with target group: {{err}}", err)
}
d.SetId(resource.PrefixedUniqueId(fmt.Sprintf("%s-", d.Get("target_group_arn"))))
return nil
}
func resourceAwsLbAttachmentDelete(d *schema.ResourceData, meta interface{}) error {
elbconn := meta.(*AWSClient).elbv2conn
target := &elbv2.TargetDescription{
Id: aws.String(d.Get("target_id").(string)),
}
if v, ok := d.GetOk("port"); ok {
target.Port = aws.Int64(int64(v.(int)))
}
if v, ok := d.GetOk("availability_zone"); ok {
target.AvailabilityZone = aws.String(v.(string))
}
params := &elbv2.DeregisterTargetsInput{
TargetGroupArn: aws.String(d.Get("target_group_arn").(string)),
Targets: []*elbv2.TargetDescription{target},
}
_, err := elbconn.DeregisterTargets(params)
if err != nil && !isTargetGroupNotFound(err) {
return errwrap.Wrapf("Error deregistering Targets: {{err}}", err)
}
d.SetId("")
return nil
}
// resourceAwsLbAttachmentRead requires all of the fields in order to describe the correct
// target, so there is no work to do beyond ensuring that the target and group still exist.
func resourceAwsLbAttachmentRead(d *schema.ResourceData, meta interface{}) error {
elbconn := meta.(*AWSClient).elbv2conn
target := &elbv2.TargetDescription{
Id: aws.String(d.Get("target_id").(string)),
}
if v, ok := d.GetOk("port"); ok {
target.Port = aws.Int64(int64(v.(int)))
}
if v, ok := d.GetOk("availability_zone"); ok {
target.AvailabilityZone = aws.String(v.(string))
}
resp, err := elbconn.DescribeTargetHealth(&elbv2.DescribeTargetHealthInput{
TargetGroupArn: aws.String(d.Get("target_group_arn").(string)),
Targets: []*elbv2.TargetDescription{target},
})
if err != nil {
if isTargetGroupNotFound(err) {
log.Printf("[WARN] Target group does not exist, removing target attachment %s", d.Id())
d.SetId("")
return nil
}
if isInvalidTarget(err) {
log.Printf("[WARN] Target does not exist, removing target attachment %s", d.Id())
d.SetId("")
return nil
}
return errwrap.Wrapf("Error reading Target Health: {{err}}", err)
}
if len(resp.TargetHealthDescriptions) != 1 {
log.Printf("[WARN] Target does not exist, removing target attachment %s", d.Id())
d.SetId("")
return nil
}
return nil
}
func isInvalidTarget(err error) bool {
elberr, ok := err.(awserr.Error)
return ok && elberr.Code() == "InvalidTarget"
}