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