terraform/builtin/providers/aws/resource_aws_elb.go

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package aws
import (
"bytes"
"fmt"
"log"
"regexp"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/elb"
"github.com/hashicorp/terraform/helper/hashcode"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
)
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,
Optional: true,
Computed: true,
ForceNew: true,
ValidateFunc: validateElbName,
},
"internal": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
ForceNew: true,
Computed: true,
},
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"cross_zone_load_balancing": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
},
"availability_zones": &schema.Schema{
Type: schema.TypeSet,
Elem: &schema.Schema{Type: schema.TypeString},
Optional: true,
ForceNew: true,
Computed: true,
Set: schema.HashString,
},
"instances": &schema.Schema{
Type: schema.TypeSet,
Elem: &schema.Schema{Type: schema.TypeString},
Optional: true,
Computed: true,
Set: schema.HashString,
},
"security_groups": &schema.Schema{
Type: schema.TypeSet,
Elem: &schema.Schema{Type: schema.TypeString},
Optional: true,
Computed: true,
Set: schema.HashString,
},
"source_security_group": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
},
"subnets": &schema.Schema{
Type: schema.TypeSet,
Elem: &schema.Schema{Type: schema.TypeString},
Optional: true,
ForceNew: true,
Computed: true,
Set: schema.HashString,
},
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"idle_timeout": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
Default: 60,
},
"connection_draining": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
Default: false,
},
"connection_draining_timeout": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
Default: 300,
},
"listener": &schema.Schema{
Type: schema.TypeSet,
Required: 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,
},
"health_check": &schema.Schema{
Type: schema.TypeSet,
Optional: 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,
},
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"zone_id": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
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"tags": tagsSchema(),
},
}
}
func resourceAwsElbCreate(d *schema.ResourceData, meta interface{}) error {
elbconn := meta.(*AWSClient).elbconn
// Expand the "listener" set to aws-sdk-go compat []*elb.Listener
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listeners, err := expandListeners(d.Get("listener").(*schema.Set).List())
if err != nil {
return err
}
var elbName string
if v, ok := d.GetOk("name"); ok {
elbName = v.(string)
} else {
elbName = resource.PrefixedUniqueId("tf-lb-")
d.Set("name", elbName)
}
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tags := tagsFromMapELB(d.Get("tags").(map[string]interface{}))
// Provision the elb
elbOpts := &elb.CreateLoadBalancerInput{
LoadBalancerName: aws.String(elbName),
Listeners: listeners,
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Tags: tags,
}
if scheme, ok := d.GetOk("internal"); ok && scheme.(bool) {
elbOpts.Scheme = aws.String("internal")
}
if v, ok := d.GetOk("availability_zones"); ok {
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elbOpts.AvailabilityZones = expandStringList(v.(*schema.Set).List())
}
if v, ok := d.GetOk("security_groups"); ok {
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elbOpts.SecurityGroups = expandStringList(v.(*schema.Set).List())
}
if v, ok := d.GetOk("subnets"); ok {
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elbOpts.Subnets = expandStringList(v.(*schema.Set).List())
}
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(elbName)
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("listener")
d.SetPartial("security_groups")
d.SetPartial("subnets")
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d.Set("tags", tagsToMapELB(tags))
return resourceAwsElbUpdate(d, meta)
}
func resourceAwsElbRead(d *schema.ResourceData, meta interface{}) error {
elbconn := meta.(*AWSClient).elbconn
elbName := d.Id()
// Retrieve the ELB properties for updating the state
describeElbOpts := &elb.DescribeLoadBalancersInput{
LoadBalancerNames: []*string{aws.String(elbName)},
}
describeResp, err := elbconn.DescribeLoadBalancers(describeElbOpts)
if err != nil {
if isLoadBalancerNotFound(err) {
// The ELB is gone now, so just remove it from the state
d.SetId("")
return nil
}
return fmt.Errorf("Error retrieving ELB: %s", err)
}
if len(describeResp.LoadBalancerDescriptions) != 1 {
return fmt.Errorf("Unable to find ELB: %#v", describeResp.LoadBalancerDescriptions)
}
describeAttrsOpts := &elb.DescribeLoadBalancerAttributesInput{
LoadBalancerName: aws.String(elbName),
}
describeAttrsResp, err := elbconn.DescribeLoadBalancerAttributes(describeAttrsOpts)
if err != nil {
if isLoadBalancerNotFound(err) {
// The ELB is gone now, so just remove it from the state
d.SetId("")
return nil
}
return fmt.Errorf("Error retrieving ELB: %s", err)
}
lbAttrs := describeAttrsResp.LoadBalancerAttributes
lb := describeResp.LoadBalancerDescriptions[0]
d.Set("name", *lb.LoadBalancerName)
d.Set("dns_name", *lb.DNSName)
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d.Set("zone_id", *lb.CanonicalHostedZoneNameID)
d.Set("internal", *lb.Scheme == "internal")
d.Set("availability_zones", lb.AvailabilityZones)
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d.Set("instances", flattenInstances(lb.Instances))
d.Set("listener", flattenListeners(lb.ListenerDescriptions))
d.Set("security_groups", lb.SecurityGroups)
if lb.SourceSecurityGroup != nil {
d.Set("source_security_group", lb.SourceSecurityGroup.GroupName)
}
d.Set("subnets", lb.Subnets)
d.Set("idle_timeout", lbAttrs.ConnectionSettings.IdleTimeout)
d.Set("connection_draining", lbAttrs.ConnectionDraining.Enabled)
d.Set("connection_draining_timeout", lbAttrs.ConnectionDraining.Timeout)
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resp, err := elbconn.DescribeTags(&elb.DescribeTagsInput{
LoadBalancerNames: []*string{lb.LoadBalancerName},
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})
var et []*elb.Tag
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if len(resp.TagDescriptions) > 0 {
et = resp.TagDescriptions[0].Tags
}
d.Set("tags", tagsToMapELB(et))
// There's only one health check, so save that to state as we
// currently can
if *lb.HealthCheck.Target != "" {
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d.Set("health_check", flattenHealthCheck(lb.HealthCheck))
}
return nil
}
func resourceAwsElbUpdate(d *schema.ResourceData, meta interface{}) error {
elbconn := meta.(*AWSClient).elbconn
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d.Partial(true)
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if d.HasChange("listener") {
o, n := d.GetChange("listener")
os := o.(*schema.Set)
ns := n.(*schema.Set)
remove, _ := expandListeners(os.Difference(ns).List())
add, _ := expandListeners(ns.Difference(os).List())
if len(remove) > 0 {
ports := make([]*int64, 0, len(remove))
for _, listener := range remove {
ports = append(ports, listener.LoadBalancerPort)
}
deleteListenersOpts := &elb.DeleteLoadBalancerListenersInput{
LoadBalancerName: aws.String(d.Id()),
LoadBalancerPorts: ports,
}
_, err := elbconn.DeleteLoadBalancerListeners(deleteListenersOpts)
if err != nil {
return fmt.Errorf("Failure removing outdated ELB listeners: %s", err)
}
}
if len(add) > 0 {
createListenersOpts := &elb.CreateLoadBalancerListenersInput{
LoadBalancerName: aws.String(d.Id()),
Listeners: add,
}
_, err := elbconn.CreateLoadBalancerListeners(createListenersOpts)
if err != nil {
return fmt.Errorf("Failure adding new or updated ELB listeners: %s", err)
}
}
d.SetPartial("listener")
}
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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)
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remove := expandInstanceString(os.Difference(ns).List())
add := expandInstanceString(ns.Difference(os).List())
if len(add) > 0 {
registerInstancesOpts := elb.RegisterInstancesWithLoadBalancerInput{
LoadBalancerName: aws.String(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 with ELB: %s", err)
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}
}
if len(remove) > 0 {
deRegisterInstancesOpts := elb.DeregisterInstancesFromLoadBalancerInput{
LoadBalancerName: aws.String(d.Id()),
Instances: remove,
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}
_, err := elbconn.DeregisterInstancesFromLoadBalancer(&deRegisterInstancesOpts)
if err != nil {
return fmt.Errorf("Failure deregistering instances from ELB: %s", err)
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}
}
d.SetPartial("instances")
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}
if d.HasChange("cross_zone_load_balancing") || d.HasChange("idle_timeout") {
attrs := elb.ModifyLoadBalancerAttributesInput{
LoadBalancerName: aws.String(d.Get("name").(string)),
LoadBalancerAttributes: &elb.LoadBalancerAttributes{
CrossZoneLoadBalancing: &elb.CrossZoneLoadBalancing{
Enabled: aws.Bool(d.Get("cross_zone_load_balancing").(bool)),
},
ConnectionSettings: &elb.ConnectionSettings{
IdleTimeout: aws.Int64(int64(d.Get("idle_timeout").(int))),
},
},
}
_, err := elbconn.ModifyLoadBalancerAttributes(&attrs)
if err != nil {
return fmt.Errorf("Failure configuring ELB attributes: %s", err)
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}
d.SetPartial("cross_zone_load_balancing")
d.SetPartial("idle_timeout")
d.SetPartial("connection_draining_timeout")
}
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// We have to do these changes separately from everything else since
// they have some weird undocumented rules. You can't set the timeout
// without having connection draining to true, so we set that to true,
// set the timeout, then reset it to false if requested.
if d.HasChange("connection_draining") || d.HasChange("connection_draining_timeout") {
// We do timeout changes first since they require us to set draining
// to true for a hot second.
if d.HasChange("connection_draining_timeout") {
attrs := elb.ModifyLoadBalancerAttributesInput{
LoadBalancerName: aws.String(d.Get("name").(string)),
LoadBalancerAttributes: &elb.LoadBalancerAttributes{
ConnectionDraining: &elb.ConnectionDraining{
Enabled: aws.Bool(true),
Timeout: aws.Int64(int64(d.Get("connection_draining_timeout").(int))),
},
},
}
_, err := elbconn.ModifyLoadBalancerAttributes(&attrs)
if err != nil {
return fmt.Errorf("Failure configuring ELB attributes: %s", err)
}
d.SetPartial("connection_draining_timeout")
}
// Then we always set connection draining even if there is no change.
// This lets us reset to "false" if requested even with a timeout
// change.
attrs := elb.ModifyLoadBalancerAttributesInput{
LoadBalancerName: aws.String(d.Get("name").(string)),
LoadBalancerAttributes: &elb.LoadBalancerAttributes{
ConnectionDraining: &elb.ConnectionDraining{
Enabled: aws.Bool(d.Get("connection_draining").(bool)),
},
},
}
_, err := elbconn.ModifyLoadBalancerAttributes(&attrs)
if err != nil {
return fmt.Errorf("Failure configuring ELB attributes: %s", err)
}
d.SetPartial("connection_draining")
}
if d.HasChange("health_check") {
vs := d.Get("health_check").(*schema.Set).List()
if len(vs) > 0 {
check := vs[0].(map[string]interface{})
configureHealthCheckOpts := elb.ConfigureHealthCheckInput{
LoadBalancerName: aws.String(d.Id()),
HealthCheck: &elb.HealthCheck{
HealthyThreshold: aws.Int64(int64(check["healthy_threshold"].(int))),
UnhealthyThreshold: aws.Int64(int64(check["unhealthy_threshold"].(int))),
Interval: aws.Int64(int64(check["interval"].(int))),
Target: aws.String(check["target"].(string)),
Timeout: aws.Int64(int64(check["timeout"].(int))),
},
}
_, err := elbconn.ConfigureHealthCheck(&configureHealthCheckOpts)
if err != nil {
return fmt.Errorf("Failure configuring health check for ELB: %s", err)
}
d.SetPartial("health_check")
}
}
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if d.HasChange("security_groups") {
groups := d.Get("security_groups").(*schema.Set).List()
applySecurityGroupsOpts := elb.ApplySecurityGroupsToLoadBalancerInput{
LoadBalancerName: aws.String(d.Id()),
SecurityGroups: expandStringList(groups),
}
_, err := elbconn.ApplySecurityGroupsToLoadBalancer(&applySecurityGroupsOpts)
if err != nil {
return fmt.Errorf("Failure applying security groups to ELB: %s", err)
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}
d.SetPartial("security_groups")
}
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if err := setTagsELB(elbconn, d); err != nil {
return err
}
d.SetPartial("tags")
d.Partial(false)
return resourceAwsElbRead(d, meta)
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}
func resourceAwsElbDelete(d *schema.ResourceData, meta interface{}) error {
elbconn := meta.(*AWSClient).elbconn
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log.Printf("[INFO] Deleting ELB: %s", d.Id())
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// Destroy the load balancer
deleteElbOpts := elb.DeleteLoadBalancerInput{
LoadBalancerName: aws.String(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 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-",
strings.ToLower(m["instance_protocol"].(string))))
buf.WriteString(fmt.Sprintf("%d-", m["lb_port"].(int)))
buf.WriteString(fmt.Sprintf("%s-",
strings.ToLower(m["lb_protocol"].(string))))
if v, ok := m["ssl_certificate_id"]; ok {
buf.WriteString(fmt.Sprintf("%s-", v.(string)))
}
return hashcode.String(buf.String())
}
func isLoadBalancerNotFound(err error) bool {
elberr, ok := err.(awserr.Error)
return ok && elberr.Code() == "LoadBalancerNotFound"
}
func validateElbName(v interface{}, k string) (ws []string, errors []error) {
value := v.(string)
if !regexp.MustCompile(`^[0-9A-Za-z-]+$`).MatchString(value) {
errors = append(errors, fmt.Errorf(
"only alphanumeric characters and hyphens allowed in %q: %q",
k, value))
}
if len(value) > 32 {
errors = append(errors, fmt.Errorf(
"%q cannot be longer than 32 characters: %q", k, value))
}
if regexp.MustCompile(`^-`).MatchString(value) {
errors = append(errors, fmt.Errorf(
"%q cannot begin with a hyphen: %q", k, value))
}
if regexp.MustCompile(`-$`).MatchString(value) {
errors = append(errors, fmt.Errorf(
"%q cannot end with a hyphen: %q", k, value))
}
return
}