package google import ( "fmt" "log" "strings" "google.golang.org/api/compute/v1" "google.golang.org/api/googleapi" "github.com/hashicorp/terraform/helper/schema" ) func resourceComputeInstanceGroup() *schema.Resource { return &schema.Resource{ Create: resourceComputeInstanceGroupCreate, Read: resourceComputeInstanceGroupRead, Update: resourceComputeInstanceGroupUpdate, Delete: resourceComputeInstanceGroupDelete, 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, }, "named_port": &schema.Schema{ Type: schema.TypeList, Optional: true, Elem: &schema.Resource{ Schema: map[string]*schema.Schema{ "name": &schema.Schema{ Type: schema.TypeString, Required: true, }, "port": &schema.Schema{ Type: schema.TypeInt, Required: true, }, }, }, }, "instances": &schema.Schema{ Type: schema.TypeList, Optional: true, Elem: &schema.Schema{Type: schema.TypeString}, }, "network": &schema.Schema{ Type: schema.TypeString, Computed: true, }, "size": &schema.Schema{ Type: schema.TypeInt, Computed: true, }, "zone": &schema.Schema{ Type: schema.TypeString, Required: true, ForceNew: true, }, "self_link": &schema.Schema{ Type: schema.TypeString, Computed: true, }, }, } } func getInstanceReferences(instanceUrls []string) (refs []*compute.InstanceReference) { for _, v := range instanceUrls { refs = append(refs, &compute.InstanceReference{ Instance: v, }) } return refs } func validInstanceURLs(instanceUrls []string) bool { for _, v := range instanceUrls { if !strings.HasPrefix(v, "https://www.googleapis.com/compute/v1/") { return false } } return true } func resourceComputeInstanceGroupCreate(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) // Build the parameter instanceGroup := &compute.InstanceGroup{ Name: d.Get("name").(string), } // Set optional fields if v, ok := d.GetOk("description"); ok { instanceGroup.Description = v.(string) } if v, ok := d.GetOk("named_port"); ok { instanceGroup.NamedPorts = getNamedPorts(v.([]interface{})) } log.Printf("[DEBUG] InstanceGroup insert request: %#v", instanceGroup) op, err := config.clientCompute.InstanceGroups.Insert( config.Project, d.Get("zone").(string), instanceGroup).Do() if err != nil { return fmt.Errorf("Error creating InstanceGroup: %s", err) } // It probably maybe worked, so store the ID now d.SetId(instanceGroup.Name) // Wait for the operation to complete err = computeOperationWaitZone(config, op, d.Get("zone").(string), "Creating InstanceGroup") if err != nil { return err } if v, ok := d.GetOk("instances"); ok { instanceUrls := convertStringArr(v.([]interface{})) if !validInstanceURLs(instanceUrls) { return fmt.Errorf("Error invalid instance URLs: %v", instanceUrls) } addInstanceReq := &compute.InstanceGroupsAddInstancesRequest{ Instances: getInstanceReferences(instanceUrls), } log.Printf("[DEBUG] InstanceGroup add instances request: %#v", addInstanceReq) op, err := config.clientCompute.InstanceGroups.AddInstances( config.Project, d.Get("zone").(string), d.Id(), addInstanceReq).Do() if err != nil { return fmt.Errorf("Error adding instances to InstanceGroup: %s", err) } // Wait for the operation to complete err = computeOperationWaitZone(config, op, d.Get("zone").(string), "Adding instances to InstanceGroup") if err != nil { return err } } return resourceComputeInstanceGroupRead(d, meta) } func resourceComputeInstanceGroupRead(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) // retreive instance group instanceGroup, err := config.clientCompute.InstanceGroups.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 InstanceGroup: %s", err) } // retreive instance group members var memberUrls []string members, err := config.clientCompute.InstanceGroups.ListInstances( config.Project, d.Get("zone").(string), d.Id(), &compute.InstanceGroupsListInstancesRequest{ InstanceState: "ALL", }).Do() if err != nil { if gerr, ok := err.(*googleapi.Error); ok && gerr.Code == 404 { // The resource doesn't have any instances d.Set("instances", nil) } else { // any other errors return them return fmt.Errorf("Error reading InstanceGroup Members: %s", err) } } else { for _, member := range members.Items { memberUrls = append(memberUrls, member.Instance) } log.Printf("[DEBUG] InstanceGroup members: %v", memberUrls) d.Set("instances", memberUrls) } // Set computed fields d.Set("network", instanceGroup.Network) d.Set("size", instanceGroup.Size) d.Set("self_link", instanceGroup.SelfLink) return nil } func resourceComputeInstanceGroupUpdate(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) // refresh the state incase referenced instances have been removed earlier in the run err := resourceComputeInstanceGroupRead(d, meta) if err != nil { return fmt.Errorf("Error reading InstanceGroup: %s", err) } d.Partial(true) if d.HasChange("instances") { // to-do check for no instances from_, to_ := d.GetChange("instances") from := convertStringArr(from_.([]interface{})) to := convertStringArr(to_.([]interface{})) if !validInstanceURLs(from) { return fmt.Errorf("Error invalid instance URLs: %v", from) } if !validInstanceURLs(to) { return fmt.Errorf("Error invalid instance URLs: %v", from) } add, remove := calcAddRemove(from, to) if len(remove) > 0 { removeReq := &compute.InstanceGroupsRemoveInstancesRequest{ Instances: getInstanceReferences(remove), } log.Printf("[DEBUG] InstanceGroup remove instances request: %#v", removeReq) removeOp, err := config.clientCompute.InstanceGroups.RemoveInstances( config.Project, d.Get("zone").(string), d.Id(), removeReq).Do() if err != nil { return fmt.Errorf("Error removing instances from InstanceGroup: %s", err) } // Wait for the operation to complete err = computeOperationWaitZone(config, removeOp, d.Get("zone").(string), "Updating InstanceGroup") if err != nil { return err } } if len(add) > 0 { addReq := &compute.InstanceGroupsAddInstancesRequest{ Instances: getInstanceReferences(add), } log.Printf("[DEBUG] InstanceGroup adding instances request: %#v", addReq) addOp, err := config.clientCompute.InstanceGroups.AddInstances( config.Project, d.Get("zone").(string), d.Id(), addReq).Do() if err != nil { return fmt.Errorf("Error adding instances from InstanceGroup: %s", err) } // Wait for the operation to complete err = computeOperationWaitZone(config, addOp, d.Get("zone").(string), "Updating InstanceGroup") if err != nil { return err } } d.SetPartial("instances") } if d.HasChange("named_port") { namedPorts := getNamedPorts(d.Get("named_port").([]interface{})) namedPortsReq := &compute.InstanceGroupsSetNamedPortsRequest{ NamedPorts: namedPorts, } log.Printf("[DEBUG] InstanceGroup updating named ports request: %#v", namedPortsReq) op, err := config.clientCompute.InstanceGroups.SetNamedPorts( config.Project, d.Get("zone").(string), d.Id(), namedPortsReq).Do() if err != nil { return fmt.Errorf("Error updating named ports for InstanceGroup: %s", err) } err = computeOperationWaitZone(config, op, d.Get("zone").(string), "Updating InstanceGroup") if err != nil { return err } d.SetPartial("named_port") } d.Partial(false) return resourceComputeInstanceGroupRead(d, meta) } func resourceComputeInstanceGroupDelete(d *schema.ResourceData, meta interface{}) error { config := meta.(*Config) zone := d.Get("zone").(string) op, err := config.clientCompute.InstanceGroups.Delete(config.Project, zone, d.Id()).Do() if err != nil { return fmt.Errorf("Error deleting InstanceGroup: %s", err) } err = computeOperationWaitZone(config, op, zone, "Deleting InstanceGroup") if err != nil { return err } d.SetId("") return nil }