forked from hashicorp/terraform
/
resource_librato_service.go
245 lines (212 loc) · 6.76 KB
/
resource_librato_service.go
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package librato
import (
"encoding/json"
"fmt"
"log"
"reflect"
"strconv"
"time"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
"github.com/henrikhodne/go-librato/librato"
)
func resourceLibratoService() *schema.Resource {
return &schema.Resource{
Create: resourceLibratoServiceCreate,
Read: resourceLibratoServiceRead,
Update: resourceLibratoServiceUpdate,
Delete: resourceLibratoServiceDelete,
Schema: map[string]*schema.Schema{
"id": &schema.Schema{
Type: schema.TypeInt,
Computed: true,
},
"type": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"title": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"settings": &schema.Schema{
Type: schema.TypeString,
Required: true,
StateFunc: normalizeJson,
},
},
}
}
// Takes JSON in a string. Decodes JSON into
// settings hash
func resourceLibratoServicesExpandSettings(rawSettings string) (map[string]string, error) {
var settings map[string]string
settings = make(map[string]string)
err := json.Unmarshal([]byte(rawSettings), &settings)
if err != nil {
return nil, fmt.Errorf("Error decoding JSON: %s", err)
}
return settings, err
}
// Encodes a settings hash into a JSON string
func resourceLibratoServicesFlatten(settings map[string]string) (string, error) {
byteArray, err := json.Marshal(settings)
if err != nil {
return "", fmt.Errorf("Error encoding to JSON: %s", err)
}
return string(byteArray), nil
}
func normalizeJson(jsonString interface{}) string {
if jsonString == nil || jsonString == "" {
return ""
}
var j interface{}
err := json.Unmarshal([]byte(jsonString.(string)), &j)
if err != nil {
return fmt.Sprintf("Error parsing JSON: %s", err)
}
b, _ := json.Marshal(j)
return string(b[:])
}
func resourceLibratoServiceCreate(d *schema.ResourceData, meta interface{}) error {
client := meta.(*librato.Client)
service := new(librato.Service)
if v, ok := d.GetOk("type"); ok {
service.Type = librato.String(v.(string))
}
if v, ok := d.GetOk("title"); ok {
service.Title = librato.String(v.(string))
}
if v, ok := d.GetOk("settings"); ok {
res, err := resourceLibratoServicesExpandSettings(normalizeJson(v.(string)))
if err != nil {
return fmt.Errorf("Error expanding Librato service settings: %s", err)
}
service.Settings = res
}
serviceResult, _, err := client.Services.Create(service)
if err != nil {
return fmt.Errorf("Error creating Librato service: %s", err)
}
resource.Retry(1*time.Minute, func() *resource.RetryError {
_, _, err := client.Services.Get(*serviceResult.ID)
if err != nil {
if errResp, ok := err.(*librato.ErrorResponse); ok && errResp.Response.StatusCode == 404 {
return resource.RetryableError(err)
}
return resource.NonRetryableError(err)
}
return nil
})
return resourceLibratoServiceReadResult(d, serviceResult)
}
func resourceLibratoServiceRead(d *schema.ResourceData, meta interface{}) error {
client := meta.(*librato.Client)
id, err := strconv.ParseUint(d.Id(), 10, 0)
if err != nil {
return err
}
log.Printf("[INFO] Reading Librato Service: %d", id)
service, _, err := client.Services.Get(uint(id))
if err != nil {
if errResp, ok := err.(*librato.ErrorResponse); ok && errResp.Response.StatusCode == 404 {
d.SetId("")
return nil
}
return fmt.Errorf("Error reading Librato Service %s: %s", d.Id(), err)
}
log.Printf("[INFO] Received Librato Service: %s", service)
return resourceLibratoServiceReadResult(d, service)
}
func resourceLibratoServiceReadResult(d *schema.ResourceData, service *librato.Service) error {
d.SetId(strconv.FormatUint(uint64(*service.ID), 10))
d.Set("id", *service.ID)
d.Set("type", *service.Type)
d.Set("title", *service.Title)
settings, _ := resourceLibratoServicesFlatten(service.Settings)
d.Set("settings", settings)
return nil
}
func resourceLibratoServiceUpdate(d *schema.ResourceData, meta interface{}) error {
client := meta.(*librato.Client)
serviceID, err := strconv.ParseUint(d.Id(), 10, 0)
if err != nil {
return err
}
// Just to have whole object for comparison before/after update
fullService, _, err := client.Services.Get(uint(serviceID))
if err != nil {
return err
}
service := new(librato.Service)
if d.HasChange("type") {
service.Type = librato.String(d.Get("type").(string))
fullService.Type = service.Type
}
if d.HasChange("title") {
service.Title = librato.String(d.Get("title").(string))
fullService.Title = service.Title
}
if d.HasChange("settings") {
res, err := resourceLibratoServicesExpandSettings(normalizeJson(d.Get("settings").(string)))
if err != nil {
return fmt.Errorf("Error expanding Librato service settings: %s", err)
}
service.Settings = res
fullService.Settings = res
}
log.Printf("[INFO] Updating Librato Service %d: %s", serviceID, service)
_, err = client.Services.Edit(uint(serviceID), service)
if err != nil {
return fmt.Errorf("Error updating Librato service: %s", err)
}
log.Printf("[INFO] Updated Librato Service %d", serviceID)
// Wait for propagation since Librato updates are eventually consistent
wait := resource.StateChangeConf{
Pending: []string{fmt.Sprintf("%t", false)},
Target: []string{fmt.Sprintf("%t", true)},
Timeout: 5 * time.Minute,
MinTimeout: 2 * time.Second,
ContinuousTargetOccurence: 5,
Refresh: func() (interface{}, string, error) {
log.Printf("[DEBUG] Checking if Librato Service %d was updated yet", serviceID)
changedService, _, err := client.Services.Get(uint(serviceID))
if err != nil {
return changedService, "", err
}
isEqual := reflect.DeepEqual(*fullService, *changedService)
log.Printf("[DEBUG] Updated Librato Service %d match: %t", serviceID, isEqual)
return changedService, fmt.Sprintf("%t", isEqual), nil
},
}
_, err = wait.WaitForState()
if err != nil {
return fmt.Errorf("Failed updating Librato Service %d: %s", serviceID, err)
}
return resourceLibratoServiceRead(d, meta)
}
func resourceLibratoServiceDelete(d *schema.ResourceData, meta interface{}) error {
client := meta.(*librato.Client)
id, err := strconv.ParseUint(d.Id(), 10, 0)
if err != nil {
return err
}
log.Printf("[INFO] Deleting Service: %d", id)
_, err = client.Services.Delete(uint(id))
if err != nil {
return fmt.Errorf("Error deleting Service: %s", err)
}
resource.Retry(1*time.Minute, func() *resource.RetryError {
_, _, err := client.Services.Get(uint(id))
if err != nil {
if errResp, ok := err.(*librato.ErrorResponse); ok && errResp.Response.StatusCode == 404 {
return nil
}
return resource.NonRetryableError(err)
}
return resource.RetryableError(fmt.Errorf("service still exists"))
})
d.SetId("")
return nil
}