terraform/builtin/providers/aws/resource_aws_elb.go

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package aws
import (
"bytes"
"fmt"
"log"
"github.com/hashicorp/terraform/helper/hashcode"
"github.com/hashicorp/terraform/helper/schema"
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"github.com/mitchellh/goamz/elb"
)
func resourceAwsElb() *schema.Resource {
return &schema.Resource{
Create: resourceAwsElbCreate,
Read: resourceAwsElbRead,
Update: resourceAwsElbUpdate,
Delete: resourceAwsElbDelete,
Schema: map[string]*schema.Schema{
"name": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"internal": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
ForceNew: true,
Computed: true,
},
"availability_zones": &schema.Schema{
Type: schema.TypeList,
Elem: &schema.Schema{Type: schema.TypeString},
Optional: true,
ForceNew: true,
},
"instances": &schema.Schema{
Type: schema.TypeSet,
Elem: &schema.Schema{Type: schema.TypeString},
Optional: true,
Set: func(v interface{}) int {
return hashcode.String(v.(string))
},
},
// TODO: could be not ForceNew
"security_groups": &schema.Schema{
Type: schema.TypeList,
Elem: &schema.Schema{Type: schema.TypeString},
Optional: true,
ForceNew: true,
Computed: true,
},
// TODO: could be not ForceNew
"subnets": &schema.Schema{
Type: schema.TypeList,
Elem: &schema.Schema{Type: schema.TypeString},
Optional: true,
ForceNew: true,
Computed: true,
},
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// TODO: could be not ForceNew
"listener": &schema.Schema{
Type: schema.TypeSet,
Required: true,
ForceNew: true,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"instance_port": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
"instance_protocol": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"lb_port": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
"lb_protocol": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"ssl_certificate_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
},
},
Set: resourceAwsElbListenerHash,
},
// TODO: could be not ForceNew
"health_check": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
ForceNew: true,
Computed: true,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"healthy_threshold": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
"unhealthy_threshold": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
"target": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"interval": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
"timeout": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
},
},
Set: resourceAwsElbHealthCheckHash,
},
"dns_name": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
},
}
}
func resourceAwsElbHealthCheckHash(v interface{}) int {
var buf bytes.Buffer
m := v.(map[string]interface{})
buf.WriteString(fmt.Sprintf("%d-", m["healthy_threshold"].(int)))
buf.WriteString(fmt.Sprintf("%d-", m["unhealthy_threshold"].(int)))
buf.WriteString(fmt.Sprintf("%s-", m["target"].(string)))
buf.WriteString(fmt.Sprintf("%d-", m["interval"].(int)))
buf.WriteString(fmt.Sprintf("%d-", m["timeout"].(int)))
return hashcode.String(buf.String())
}
func resourceAwsElbListenerHash(v interface{}) int {
var buf bytes.Buffer
m := v.(map[string]interface{})
buf.WriteString(fmt.Sprintf("%d-", m["instance_port"].(int)))
buf.WriteString(fmt.Sprintf("%s-", m["instance_protocol"].(string)))
buf.WriteString(fmt.Sprintf("%d-", m["lb_port"].(int)))
buf.WriteString(fmt.Sprintf("%s-", m["lb_protocol"].(string)))
if v, ok := m["ssl_certificate_id"]; ok {
buf.WriteString(fmt.Sprintf("%s-", v.(string)))
}
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return hashcode.String(buf.String())
}
func resourceAwsElbCreate(d *schema.ResourceData, meta interface{}) error {
p := meta.(*ResourceProvider)
elbconn := p.elbconn
// Expand the "listener" set to goamz compat []elb.Listener
listeners, err := expandListeners(d.Get("listener").(*schema.Set).List())
if err != nil {
return err
}
// Provision the elb
elbOpts := &elb.CreateLoadBalancer{
LoadBalancerName: d.Get("name").(string),
Listeners: listeners,
Internal: d.Get("internal").(bool),
}
if v, ok := d.GetOk("availability_zones"); ok {
elbOpts.AvailZone = expandStringList(v.([]interface{}))
}
if v, ok := d.GetOk("security_groups"); ok {
elbOpts.SecurityGroups = expandStringList(v.([]interface{}))
}
if v, ok := d.GetOk("subnets"); ok {
elbOpts.Subnets = expandStringList(v.([]interface{}))
}
log.Printf("[DEBUG] ELB create configuration: %#v", elbOpts)
if _, err := elbconn.CreateLoadBalancer(elbOpts); err != nil {
return fmt.Errorf("Error creating ELB: %s", err)
}
// Assign the elb's unique identifier for use later
d.SetId(d.Get("name").(string))
log.Printf("[INFO] ELB ID: %s", d.Id())
// Enable partial mode and record what we set
d.Partial(true)
d.SetPartial("name")
d.SetPartial("internal")
d.SetPartial("availability_zones")
d.SetPartial("security_groups")
d.SetPartial("subnets")
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if d.HasChange("health_check") {
vs := d.Get("health_check").(*schema.Set).List()
if len(vs) > 0 {
check := vs[0].(map[string]interface{})
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configureHealthCheckOpts := elb.ConfigureHealthCheck{
LoadBalancerName: d.Id(),
Check: elb.HealthCheck{
HealthyThreshold: int64(check["healthy_threshold"].(int)),
UnhealthyThreshold: int64(check["unhealthy_threshold"].(int)),
Interval: int64(check["interval"].(int)),
Target: check["target"].(string),
Timeout: int64(check["timeout"].(int)),
},
}
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_, err = elbconn.ConfigureHealthCheck(&configureHealthCheckOpts)
if err != nil {
return fmt.Errorf("Failure configuring health check: %s", err)
}
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}
}
return resourceAwsElbUpdate(d, meta)
}
func resourceAwsElbUpdate(d *schema.ResourceData, meta interface{}) error {
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p := meta.(*ResourceProvider)
elbconn := p.elbconn
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d.Partial(true)
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// If we currently have instances, or did have instances,
// we want to figure out what to add and remove from the load
// balancer
if d.HasChange("instances") {
o, n := d.GetChange("instances")
os := o.(*schema.Set)
ns := n.(*schema.Set)
remove := expandStringList(os.Difference(ns).List())
add := expandStringList(ns.Difference(os).List())
if len(add) > 0 {
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registerInstancesOpts := elb.RegisterInstancesWithLoadBalancer{
LoadBalancerName: d.Id(),
Instances: add,
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}
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_, err := elbconn.RegisterInstancesWithLoadBalancer(&registerInstancesOpts)
if err != nil {
return fmt.Errorf("Failure registering instances: %s", err)
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}
}
if len(remove) > 0 {
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deRegisterInstancesOpts := elb.DeregisterInstancesFromLoadBalancer{
LoadBalancerName: d.Id(),
Instances: remove,
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}
_, err := elbconn.DeregisterInstancesFromLoadBalancer(&deRegisterInstancesOpts)
if err != nil {
return fmt.Errorf("Failure deregistering instances: %s", err)
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}
}
d.SetPartial("instances")
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}
d.Partial(false)
return resourceAwsElbRead(d, meta)
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}
func resourceAwsElbDelete(d *schema.ResourceData, meta interface{}) error {
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p := meta.(*ResourceProvider)
elbconn := p.elbconn
log.Printf("[INFO] Deleting ELB: %s", d.Id())
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// Destroy the load balancer
deleteElbOpts := elb.DeleteLoadBalancer{
LoadBalancerName: d.Id(),
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}
if _, err := elbconn.DeleteLoadBalancer(&deleteElbOpts); err != nil {
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return fmt.Errorf("Error deleting ELB: %s", err)
}
return nil
}
func resourceAwsElbRead(d *schema.ResourceData, meta interface{}) error {
p := meta.(*ResourceProvider)
elbconn := p.elbconn
// Retrieve the ELB properties for updating the state
describeElbOpts := &elb.DescribeLoadBalancer{
Names: []string{d.Id()},
}
describeResp, err := elbconn.DescribeLoadBalancers(describeElbOpts)
if err != nil {
if ec2err, ok := err.(*elb.Error); ok && ec2err.Code == "LoadBalancerNotFound" {
// The ELB is gone now, so just remove it from the state
d.SetId("")
return nil
}
return fmt.Errorf("Error retrieving ELB: %s", err)
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}
if len(describeResp.LoadBalancers) != 1 {
return fmt.Errorf("Unable to find ELB: %#v", describeResp.LoadBalancers)
}
lb := describeResp.LoadBalancers[0]
d.Set("name", lb.LoadBalancerName)
d.Set("dns_name", lb.DNSName)
d.Set("internal", lb.Scheme == "internal")
d.Set("instances", flattenInstances(lb.Instances))
d.Set("listener", flattenListeners(lb.Listeners))
d.Set("security_groups", lb.SecurityGroups)
d.Set("subnets", lb.Subnets)
// There's only one health check, so save that to state as we
// currently can
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if lb.HealthCheck.Target != "" {
d.Set("health_check", flattenHealthCheck(lb.HealthCheck))
}
return nil
}