345 lines
9.6 KiB
Go
345 lines
9.6 KiB
Go
package aws
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import (
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"fmt"
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"log"
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"strings"
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"time"
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"github.com/hashicorp/terraform/helper/hashcode"
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"github.com/hashicorp/terraform/helper/resource"
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"github.com/hashicorp/terraform/helper/schema"
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"github.com/hashicorp/aws-sdk-go/aws"
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"github.com/hashicorp/aws-sdk-go/gen/autoscaling"
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)
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func resourceAwsAutoscalingGroup() *schema.Resource {
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return &schema.Resource{
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Create: resourceAwsAutoscalingGroupCreate,
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Read: resourceAwsAutoscalingGroupRead,
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Update: resourceAwsAutoscalingGroupUpdate,
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Delete: resourceAwsAutoscalingGroupDelete,
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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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"launch_configuration": &schema.Schema{
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Type: schema.TypeString,
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Required: true,
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},
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"desired_capacity": &schema.Schema{
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Type: schema.TypeInt,
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Optional: true,
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Computed: true,
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},
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"min_size": &schema.Schema{
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Type: schema.TypeInt,
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Required: true,
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},
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"max_size": &schema.Schema{
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Type: schema.TypeInt,
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Required: true,
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},
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"default_cooldown": &schema.Schema{
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Type: schema.TypeInt,
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Optional: true,
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Computed: true,
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ForceNew: true,
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},
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"force_delete": &schema.Schema{
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Type: schema.TypeBool,
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Optional: true,
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Computed: true,
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ForceNew: true,
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},
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"health_check_grace_period": &schema.Schema{
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Type: schema.TypeInt,
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Optional: true,
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Computed: true,
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ForceNew: true,
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},
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"health_check_type": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Computed: true,
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ForceNew: true,
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},
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"availability_zones": &schema.Schema{
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Type: schema.TypeSet,
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Required: true,
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ForceNew: true,
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Elem: &schema.Schema{Type: schema.TypeString},
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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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"load_balancers": &schema.Schema{
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Type: schema.TypeSet,
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Optional: true,
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ForceNew: true,
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Elem: &schema.Schema{Type: schema.TypeString},
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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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"vpc_zone_identifier": &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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ForceNew: true,
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Elem: &schema.Schema{Type: schema.TypeString},
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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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"termination_policies": &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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ForceNew: true,
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Elem: &schema.Schema{Type: schema.TypeString},
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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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},
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}
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}
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func resourceAwsAutoscalingGroupCreate(d *schema.ResourceData, meta interface{}) error {
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autoscalingconn := meta.(*AWSClient).autoscalingconn
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var autoScalingGroupOpts autoscaling.CreateAutoScalingGroupType
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autoScalingGroupOpts.AutoScalingGroupName = aws.String(d.Get("name").(string))
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autoScalingGroupOpts.LaunchConfigurationName = aws.String(d.Get("launch_configuration").(string))
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autoScalingGroupOpts.MinSize = aws.Integer(d.Get("min_size").(int))
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autoScalingGroupOpts.MaxSize = aws.Integer(d.Get("max_size").(int))
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autoScalingGroupOpts.AvailabilityZones = expandStringList(
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d.Get("availability_zones").(*schema.Set).List())
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if v, ok := d.GetOk("default_cooldown"); ok {
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autoScalingGroupOpts.DefaultCooldown = aws.Integer(v.(int))
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}
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if v, ok := d.GetOk("health_check"); ok && v.(string) != "" {
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autoScalingGroupOpts.HealthCheckType = aws.String(v.(string))
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}
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if v, ok := d.GetOk("desired_capacity"); ok {
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autoScalingGroupOpts.DesiredCapacity = aws.Integer(v.(int))
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}
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if v, ok := d.GetOk("health_check_grace_period"); ok {
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autoScalingGroupOpts.HealthCheckGracePeriod = aws.Integer(v.(int))
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}
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if v, ok := d.GetOk("load_balancers"); ok && v.(*schema.Set).Len() > 0 {
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autoScalingGroupOpts.LoadBalancerNames = expandStringList(
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v.(*schema.Set).List())
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}
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if v, ok := d.GetOk("vpc_zone_identifier"); ok && v.(*schema.Set).Len() > 0 {
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exp := expandStringList(v.(*schema.Set).List())
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autoScalingGroupOpts.VPCZoneIdentifier = aws.String(strings.Join(exp, ","))
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}
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if v, ok := d.GetOk("termination_policies"); ok && v.(*schema.Set).Len() > 0 {
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autoScalingGroupOpts.TerminationPolicies = expandStringList(
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v.(*schema.Set).List())
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}
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log.Printf("[DEBUG] AutoScaling Group create configuration: %#v", autoScalingGroupOpts)
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err := autoscalingconn.CreateAutoScalingGroup(&autoScalingGroupOpts)
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if err != nil {
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return fmt.Errorf("Error creating Autoscaling Group: %s", err)
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}
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d.SetId(d.Get("name").(string))
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log.Printf("[INFO] AutoScaling Group ID: %s", d.Id())
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return resourceAwsAutoscalingGroupRead(d, meta)
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}
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func resourceAwsAutoscalingGroupRead(d *schema.ResourceData, meta interface{}) error {
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g, err := getAwsAutoscalingGroup(d, meta)
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if err != nil {
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return err
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}
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if g == nil {
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return nil
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}
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d.Set("availability_zones", g.AvailabilityZones)
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d.Set("default_cooldown", *g.DefaultCooldown)
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d.Set("desired_capacity", *g.DesiredCapacity)
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d.Set("health_check_grace_period", *g.HealthCheckGracePeriod)
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d.Set("health_check_type", *g.HealthCheckType)
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d.Set("launch_configuration", *g.LaunchConfigurationName)
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d.Set("load_balancers", g.LoadBalancerNames)
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d.Set("min_size", *g.MinSize)
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d.Set("max_size", *g.MaxSize)
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d.Set("name", *g.AutoScalingGroupName)
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d.Set("vpc_zone_identifier", strings.Split(*g.VPCZoneIdentifier, ","))
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d.Set("termination_policies", g.TerminationPolicies)
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return nil
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}
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func resourceAwsAutoscalingGroupUpdate(d *schema.ResourceData, meta interface{}) error {
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autoscalingconn := meta.(*AWSClient).autoscalingconn
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opts := autoscaling.UpdateAutoScalingGroupType{
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AutoScalingGroupName: aws.String(d.Id()),
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}
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if d.HasChange("desired_capacity") {
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opts.DesiredCapacity = aws.Integer(d.Get("desired_capacity").(int))
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}
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if d.HasChange("launch_configuration") {
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opts.LaunchConfigurationName = aws.String(d.Get("launch_configuration").(string))
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}
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if d.HasChange("min_size") {
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opts.MinSize = aws.Integer(d.Get("min_size").(int))
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}
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if d.HasChange("max_size") {
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opts.MaxSize = aws.Integer(d.Get("max_size").(int))
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}
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log.Printf("[DEBUG] AutoScaling Group update configuration: %#v", opts)
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err := autoscalingconn.UpdateAutoScalingGroup(&opts)
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if err != nil {
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d.Partial(true)
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return fmt.Errorf("Error updating Autoscaling group: %s", err)
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}
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return resourceAwsAutoscalingGroupRead(d, meta)
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}
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func resourceAwsAutoscalingGroupDelete(d *schema.ResourceData, meta interface{}) error {
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autoscalingconn := meta.(*AWSClient).autoscalingconn
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// Read the autoscaling group first. If it doesn't exist, we're done.
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// We need the group in order to check if there are instances attached.
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// If so, we need to remove those first.
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g, err := getAwsAutoscalingGroup(d, meta)
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if err != nil {
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return err
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}
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if g == nil {
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return nil
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}
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if len(g.Instances) > 0 || *g.DesiredCapacity > 0 {
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if err := resourceAwsAutoscalingGroupDrain(d, meta); err != nil {
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return err
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}
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}
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log.Printf("[DEBUG] AutoScaling Group destroy: %v", d.Id())
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deleteopts := autoscaling.DeleteAutoScalingGroupType{AutoScalingGroupName: aws.String(d.Id())}
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// You can force an autoscaling group to delete
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// even if it's in the process of scaling a resource.
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// Normally, you would set the min-size and max-size to 0,0
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// and then delete the group. This bypasses that and leaves
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// resources potentially dangling.
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if d.Get("force_delete").(bool) {
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deleteopts.ForceDelete = aws.Boolean(true)
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}
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if err := autoscalingconn.DeleteAutoScalingGroup(&deleteopts); err != nil {
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autoscalingerr, ok := err.(aws.APIError)
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if ok && autoscalingerr.Code == "InvalidGroup.NotFound" {
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return nil
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}
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return err
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}
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return nil
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}
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func getAwsAutoscalingGroup(
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d *schema.ResourceData,
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meta interface{}) (*autoscaling.AutoScalingGroup, error) {
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autoscalingconn := meta.(*AWSClient).autoscalingconn
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describeOpts := autoscaling.AutoScalingGroupNamesType{
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AutoScalingGroupNames: []string{d.Id()},
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}
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log.Printf("[DEBUG] AutoScaling Group describe configuration: %#v", describeOpts)
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describeGroups, err := autoscalingconn.DescribeAutoScalingGroups(&describeOpts)
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if err != nil {
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autoscalingerr, ok := err.(aws.APIError)
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if ok && autoscalingerr.Code == "InvalidGroup.NotFound" {
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d.SetId("")
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return nil, nil
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}
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return nil, fmt.Errorf("Error retrieving AutoScaling groups: %s", err)
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}
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// Search for the autoscaling group
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for idx, asc := range describeGroups.AutoScalingGroups {
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if *asc.AutoScalingGroupName == d.Id() {
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return &describeGroups.AutoScalingGroups[idx], nil
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}
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}
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// ASG not found
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d.SetId("")
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return nil, nil
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}
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func resourceAwsAutoscalingGroupDrain(d *schema.ResourceData, meta interface{}) error {
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autoscalingconn := meta.(*AWSClient).autoscalingconn
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// First, set the capacity to zero so the group will drain
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log.Printf("[DEBUG] Reducing autoscaling group capacity to zero")
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opts := autoscaling.UpdateAutoScalingGroupType{
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AutoScalingGroupName: aws.String(d.Id()),
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DesiredCapacity: aws.Integer(0),
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MinSize: aws.Integer(0),
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MaxSize: aws.Integer(0),
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}
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if err := autoscalingconn.UpdateAutoScalingGroup(&opts); err != nil {
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return fmt.Errorf("Error setting capacity to zero to drain: %s", err)
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}
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// Next, wait for the autoscale group to drain
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log.Printf("[DEBUG] Waiting for group to have zero instances")
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return resource.Retry(10*time.Minute, func() error {
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g, err := getAwsAutoscalingGroup(d, meta)
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if err != nil {
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return resource.RetryError{Err: err}
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}
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if g == nil {
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return nil
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}
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if len(g.Instances) == 0 {
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return nil
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}
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return fmt.Errorf("group still has %d instances", len(g.Instances))
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})
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}
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