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