terraform/builtin/providers/google/resource_compute_instance_g...

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package google
import (
"fmt"
"log"
"strings"
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"google.golang.org/api/compute/v1"
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"google.golang.org/api/googleapi"
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"github.com/hashicorp/terraform/helper/hashcode"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceComputeInstanceGroupManager() *schema.Resource {
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return &schema.Resource{
Create: resourceComputeInstanceGroupManagerCreate,
Read: resourceComputeInstanceGroupManagerRead,
Update: resourceComputeInstanceGroupManagerUpdate,
Delete: resourceComputeInstanceGroupManagerDelete,
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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{
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Type: schema.TypeString,
Computed: true,
},
"instance_template": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"update_strategy": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: "RESTART",
},
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"target_pools": &schema.Schema{
Type: schema.TypeSet,
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Optional: true,
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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,
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},
"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 {
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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))
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}
// Build the parameter
manager := &compute.InstanceGroupManager{
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Name: d.Get("name").(string),
BaseInstanceName: d.Get("base_instance_name").(string),
InstanceTemplate: d.Get("instance_template").(string),
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TargetSize: target_size,
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}
// 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
}
updateStrategy := d.Get("update_strategy").(string)
if !(updateStrategy == "NONE" || updateStrategy == "RESTART") {
return fmt.Errorf("Update strategy must be \"NONE\" or \"RESTART\"")
}
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log.Printf("[DEBUG] InstanceGroupManager insert request: %#v", manager)
op, err := config.clientCompute.InstanceGroupManagers.Insert(
config.Project, d.Get("zone").(string), manager).Do()
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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")
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if err != nil {
return err
}
return resourceComputeInstanceGroupManagerRead(d, meta)
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}
func resourceComputeInstanceGroupManagerRead(d *schema.ResourceData, meta interface{}) error {
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config := meta.(*Config)
manager, err := config.clientCompute.InstanceGroupManagers.Get(
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config.Project, d.Get("zone").(string), d.Id()).Do()
if err != nil {
if gerr, ok := err.(*googleapi.Error); ok && gerr.Code == 404 {
log.Printf("[WARN] Removing Instance Group Manager %q because it's gone", d.Get("name").(string))
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// 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)
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d.Set("target_size", manager.TargetSize)
d.Set("self_link", manager.SelfLink)
return nil
}
func resourceComputeInstanceGroupManagerUpdate(d *schema.ResourceData, meta interface{}) error {
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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{
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Fingerprint: d.Get("fingerprint").(string),
TargetPools: targetPools,
}
op, err := config.clientCompute.InstanceGroupManagers.SetTargetPools(
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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")
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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{
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InstanceTemplate: d.Get("instance_template").(string),
}
op, err := config.clientCompute.InstanceGroupManagers.SetInstanceTemplate(
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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")
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if err != nil {
return err
}
if d.Get("update_strategy").(string) == "RESTART" {
managedInstances, err := config.clientCompute.InstanceGroupManagers.ListManagedInstances(
config.Project, d.Get("zone").(string), d.Id()).Do()
managedInstanceCount := len(managedInstances.ManagedInstances)
instances := make([]string, managedInstanceCount)
for i, v := range managedInstances.ManagedInstances {
instances[i] = v.Instance
}
recreateInstances := &compute.InstanceGroupManagersRecreateInstancesRequest{
Instances: instances,
}
op, err = config.clientCompute.InstanceGroupManagers.RecreateInstances(
config.Project, d.Get("zone").(string), d.Id(), recreateInstances).Do()
if err != nil {
return fmt.Errorf("Error restarting instance group managers instances: %s", err)
}
// Wait for the operation to complete
err = computeOperationWaitZoneTime(config, op, d.Get("zone").(string),
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managedInstanceCount*4, "Restarting InstanceGroupManagers instances")
if err != nil {
return err
}
}
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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)
}
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// Wait for the operation to complete
err = computeOperationWaitZone(config, op, d.Get("zone").(string), "Updating InstanceGroupManager")
if err != nil {
return err
}
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}
d.SetPartial("target_size")
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}
d.Partial(false)
return resourceComputeInstanceGroupManagerRead(d, meta)
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}
func resourceComputeInstanceGroupManagerDelete(d *schema.ResourceData, meta interface{}) error {
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config := meta.(*Config)
zone := d.Get("zone").(string)
op, err := config.clientCompute.InstanceGroupManagers.Delete(config.Project, zone, d.Id()).Do()
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if err != nil {
return fmt.Errorf("Error deleting instance group manager: %s", err)
}
currentSize := int64(d.Get("target_size").(int))
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// 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") {
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return err
}
instanceGroup, err := config.clientCompute.InstanceGroups.Get(
config.Project, d.Get("zone").(string), d.Id()).Do()
if err != nil {
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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")
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}
d.SetId("")
return nil
}