package google import ( "fmt" "log" "strings" "google.golang.org/api/compute/v1" "google.golang.org/api/googleapi" "github.com/hashicorp/terraform/helper/hashcode" "github.com/hashicorp/terraform/helper/schema" ) func resourceComputeInstanceGroupManager() *schema.Resource { return &schema.Resource{ Create: resourceComputeInstanceGroupManagerCreate, Read: resourceComputeInstanceGroupManagerRead, Update: resourceComputeInstanceGroupManagerUpdate, Delete: resourceComputeInstanceGroupManagerDelete, Schema: map[string]*schema.Schema{ "name": &schema.Schema{ Type: schema.TypeString, Required: true, ForceNew: true, }, "description": &schema.Schema{ Type: schema.TypeString, Optional: true, ForceNew: true, }, "base_instance_name": &schema.Schema{ Type: schema.TypeString, Required: true, ForceNew: true, }, "fingerprint": &schema.Schema{ Type: schema.TypeString, Computed: true, }, "instance_group": &schema.Schema{ Type: schema.TypeString, Computed: true, }, "instance_template": &schema.Schema{ Type: schema.TypeString, Required: true, }, "target_pools": &schema.Schema{ Type: schema.TypeSet, Optional: true, Elem: &schema.Schema{Type: schema.TypeString}, Set: func(v interface{}) int { return hashcode.String(v.(string)) }, }, "target_size": &schema.Schema{ Type: schema.TypeInt, Computed: true, Optional: true, }, "zone": &schema.Schema{ Type: schema.TypeString, Required: true, ForceNew: true, }, "self_link": &schema.Schema{ Type: schema.TypeString, Computed: true, }, }, } } func resourceComputeInstanceGroupManagerCreate(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) // Get group size, default to 1 if not given var target_size int64 = 1 if v, ok := d.GetOk("target_size"); ok { target_size = int64(v.(int)) } // Build the parameter manager := &compute.InstanceGroupManager{ Name: d.Get("name").(string), BaseInstanceName: d.Get("base_instance_name").(string), InstanceTemplate: d.Get("instance_template").(string), TargetSize: target_size, } // Set optional fields if v, ok := d.GetOk("description"); ok { manager.Description = v.(string) } if attr := d.Get("target_pools").(*schema.Set); attr.Len() > 0 { var s []string for _, v := range attr.List() { s = append(s, v.(string)) } manager.TargetPools = s } log.Printf("[DEBUG] InstanceGroupManager insert request: %#v", manager) op, err := config.clientCompute.InstanceGroupManagers.Insert( config.Project, d.Get("zone").(string), manager).Do() if err != nil { return fmt.Errorf("Error creating InstanceGroupManager: %s", err) } // It probably maybe worked, so store the ID now d.SetId(manager.Name) // Wait for the operation to complete err = computeOperationWaitZone(config, op, d.Get("zone").(string), "Creating InstanceGroupManager") if err != nil { return err } return resourceComputeInstanceGroupManagerRead(d, meta) } func resourceComputeInstanceGroupManagerRead(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) manager, err := config.clientCompute.InstanceGroupManagers.Get( config.Project, d.Get("zone").(string), d.Id()).Do() if err != nil { if gerr, ok := err.(*googleapi.Error); ok && gerr.Code == 404 { // The resource doesn't exist anymore d.SetId("") return nil } return fmt.Errorf("Error reading instance group manager: %s", err) } // Set computed fields d.Set("fingerprint", manager.Fingerprint) d.Set("instance_group", manager.InstanceGroup) d.Set("target_size", manager.TargetSize) d.Set("self_link", manager.SelfLink) return nil } func resourceComputeInstanceGroupManagerUpdate(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) d.Partial(true) // If target_pools changes then update if d.HasChange("target_pools") { var targetPools []string if attr := d.Get("target_pools").(*schema.Set); attr.Len() > 0 { for _, v := range attr.List() { targetPools = append(targetPools, v.(string)) } } // Build the parameter setTargetPools := &compute.InstanceGroupManagersSetTargetPoolsRequest{ Fingerprint: d.Get("fingerprint").(string), TargetPools: targetPools, } op, err := config.clientCompute.InstanceGroupManagers.SetTargetPools( config.Project, d.Get("zone").(string), d.Id(), setTargetPools).Do() if err != nil { return fmt.Errorf("Error updating InstanceGroupManager: %s", err) } // Wait for the operation to complete err = computeOperationWaitZone(config, op, d.Get("zone").(string), "Updating InstanceGroupManager") if err != nil { return err } d.SetPartial("target_pools") } // If instance_template changes then update if d.HasChange("instance_template") { // Build the parameter setInstanceTemplate := &compute.InstanceGroupManagersSetInstanceTemplateRequest{ InstanceTemplate: d.Get("instance_template").(string), } op, err := config.clientCompute.InstanceGroupManagers.SetInstanceTemplate( config.Project, d.Get("zone").(string), d.Id(), setInstanceTemplate).Do() if err != nil { return fmt.Errorf("Error updating InstanceGroupManager: %s", err) } // Wait for the operation to complete err = computeOperationWaitZone(config, op, d.Get("zone").(string), "Updating InstanceGroupManager") if err != nil { return err } d.SetPartial("instance_template") } // If size changes trigger a resize if d.HasChange("target_size") { if v, ok := d.GetOk("target_size"); ok { // Only do anything if the new size is set target_size := int64(v.(int)) op, err := config.clientCompute.InstanceGroupManagers.Resize( config.Project, d.Get("zone").(string), d.Id(), target_size).Do() if err != nil { return fmt.Errorf("Error updating InstanceGroupManager: %s", err) } // Wait for the operation to complete err = computeOperationWaitZone(config, op, d.Get("zone").(string), "Updating InstanceGroupManager") if err != nil { return err } } d.SetPartial("target_size") } d.Partial(false) return resourceComputeInstanceGroupManagerRead(d, meta) } func resourceComputeInstanceGroupManagerDelete(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) zone := d.Get("zone").(string) op, err := config.clientCompute.InstanceGroupManagers.Delete(config.Project, zone, d.Id()).Do() if err != nil { return fmt.Errorf("Error deleting instance group manager: %s", err) } currentSize := int64(d.Get("target_size").(int)) // Wait for the operation to complete err = computeOperationWaitZone(config, op, d.Get("zone").(string), "Deleting InstanceGroupManager") for err != nil && currentSize > 0 { if !strings.Contains(err.Error(), "timeout") { return err } instanceGroup, err := config.clientCompute.InstanceGroups.Get( config.Project, d.Get("zone").(string), d.Id()).Do() if err != nil { return fmt.Errorf("Error getting instance group size: %s", err) } if instanceGroup.Size >= currentSize { return fmt.Errorf("Error, instance group isn't shrinking during delete") } log.Printf("[INFO] timeout occured, but instance group is shrinking (%d < %d)", instanceGroup.Size, currentSize) currentSize = instanceGroup.Size err = computeOperationWaitZone(config, op, d.Get("zone").(string), "Deleting InstanceGroupManager") } d.SetId("") return nil }