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base_fastly_service_v1.go
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base_fastly_service_v1.go
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package fastly
import (
"errors"
"fmt"
"log"
"time"
gofastly "github.com/fastly/go-fastly/fastly"
"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
)
var fastlyNoServiceFoundErr = errors.New("No matching Fastly Service found")
const (
// ServiceTypeVCL is the type for VCL services.
ServiceTypeVCL = "vcl"
// ServiceTypeCompute is the type for Compute services.
ServiceTypeCompute = "wasm"
)
// ServiceAttributeDefinition provides an interface for service attributes.
// We compose a service resource out of attribute objects to allow us to construct both the VCL and Compute service
// resources from common components.
type ServiceAttributeDefinition interface {
// Register add the attribute to the resource schema.
Register(s *schema.Resource) error
// Read refreshes the attribute state against the Fastly API.
Read(d *schema.ResourceData, s *gofastly.ServiceDetail, conn *gofastly.Client) error
// Process creates or updates the attribute against the Fastly API.
Process(d *schema.ResourceData, latestVersion int, conn *gofastly.Client) error
// HasChange returns whether the state of the attribute has changed against Terraform stored state.
HasChange(d *schema.ResourceData) bool
// MustProcess returns whether we must process the resource (usually HasChange==true but allowing exceptions).
// For example: at present, the settings attributeHandler (block_fastly_service_v1_settings.go) must process when
// default_ttl==0 and it is the initialVersion - as well as when default_ttl or default_host have changed.
MustProcess(d *schema.ResourceData, initialVersion bool) bool
}
// ServiceMetadata provides a container to pass service attributes into an Attribute handler.
type ServiceMetadata struct {
serviceType string
}
// DefaultServiceAttributeHandler provides a base implementation for ServiceAttributeDefinition.
type DefaultServiceAttributeHandler struct {
key string
serviceMetadata ServiceMetadata
}
// GetKey is provided since most attributes will just use their private "key" for interacting with the service.
func (h *DefaultServiceAttributeHandler) GetKey() string {
return h.key
}
// GetServiceMetadata is provided to allow internal methods to get the service Metadata
func (h *DefaultServiceAttributeHandler) GetServiceMetadata() ServiceMetadata {
return h.serviceMetadata
}
// See interface definition for comments.
func (h *DefaultServiceAttributeHandler) HasChange(d *schema.ResourceData) bool {
return d.HasChange(h.key)
}
// See interface definition for comments.
func (h *DefaultServiceAttributeHandler) MustProcess(d *schema.ResourceData, initialVersion bool) bool {
return h.HasChange(d)
}
type VCLLoggingAttributes struct {
format string
formatVersion *uint
placement string
responseCondition string
}
// getVCLLoggingAttributes provides default values to Compute services for VCL only logging attributes
func (h *DefaultServiceAttributeHandler) getVCLLoggingAttributes(data map[string]interface{}) VCLLoggingAttributes {
var vla = VCLLoggingAttributes{
placement: "none",
}
if h.GetServiceMetadata().serviceType == ServiceTypeVCL {
if val, ok := data["format"]; ok {
vla.format = val.(string)
}
if val, ok := data["format_version"]; ok {
vla.formatVersion = gofastly.Uint(uint(val.(int)))
}
if val, ok := data["placement"]; ok {
vla.placement = val.(string)
}
if val, ok := data["response_condition"]; ok {
vla.responseCondition = val.(string)
}
}
return vla
}
// ServiceDefinition defines the data model for service definitions
// There are two types of service: VCL and Compute. This interface specifies the data object from which service resources
// are constructed.
type ServiceDefinition interface {
// GetType returns whether this is a VCL or Compute service.
GetType() string
// GetAttributeHandler returns the list of attributes/handlers supported by this service.
GetAttributeHandler() []ServiceAttributeDefinition
}
// BaseServiceDefinition is the base implementation of the BaseServiceDefinition interface.
type BaseServiceDefinition struct {
Attributes []ServiceAttributeDefinition
Type string
}
func (d *BaseServiceDefinition) GetType() string {
return d.Type
}
func (d *BaseServiceDefinition) GetAttributeHandler() []ServiceAttributeDefinition {
return d.Attributes
}
// resourceService returns a Terraform resource schema for VCL or Compute.
func resourceService(serviceDef ServiceDefinition) *schema.Resource {
s := &schema.Resource{
Create: resourceCreate(serviceDef),
Read: resourceRead(serviceDef),
Update: resourceUpdate(serviceDef),
Delete: resourceDelete(serviceDef),
Importer: resourceImport(serviceDef),
Schema: map[string]*schema.Schema{
"name": {
Type: schema.TypeString,
Required: true,
Description: "Unique name for this Service",
},
"comment": {
Type: schema.TypeString,
Optional: true,
Default: "Managed by Terraform",
Description: "A personal freeform descriptive note",
},
"version_comment": {
Type: schema.TypeString,
Optional: true,
Description: "A personal freeform descriptive note",
},
// Active Version represents the currently activated version in Fastly. In
// Terraform, we abstract this number away from the users and manage
// creating and activating. It's used internally, but also exported for
// users to see.
"active_version": {
Type: schema.TypeInt,
Computed: true,
},
// Cloned Version represents the latest cloned version by the provider. It
// gets set whenever Terraform detects changes and clones the currently
// activated version in order to modify it. Active Version and Cloned
// Version can be different if the Activate field is set to false in order
// to prevent the service from being activated. It is not used internally,
// but it is exported for users to see after running `terraform apply`.
"cloned_version": {
Type: schema.TypeInt,
Computed: true,
},
"activate": {
Type: schema.TypeBool,
Description: "Conditionally prevents the Service from being activated",
Default: true,
Optional: true,
},
"force_destroy": {
Type: schema.TypeBool,
Optional: true,
},
},
}
// This loops over all the attribute handlers in the service definition and calls Register.
// Register adds schema attributes to the overall schema for the resource. This allows each AttributeHandler to
// define it's own attributes while allowing the overall set to be composed.
for _, a := range serviceDef.GetAttributeHandler() {
a.Register(s) // Mutates s, adding handler-specific schema items to the list.
}
return s
}
// resourceCreate satisfies the Terraform resource schema Create "interface"
// while injecting the ServiceDefinition into the true Create functionality.
func resourceCreate(serviceDef ServiceDefinition) schema.CreateFunc {
return func(data *schema.ResourceData, i interface{}) error {
return resourceServiceCreate(data, i, serviceDef)
}
}
// resourceRead satisfies the Terraform resource schema Read "interface"
// while injecting the ServiceDefinition into the true Read functionality.
func resourceRead(serviceDef ServiceDefinition) schema.ReadFunc {
return func(data *schema.ResourceData, i interface{}) error {
return resourceServiceRead(data, i, serviceDef, false)
}
}
// resourceUpdate satisfies the Terraform resource schema Update "interface"
// while injecting the ServiceDefinition into the true Update functionality.
func resourceUpdate(serviceDef ServiceDefinition) schema.UpdateFunc {
return func(data *schema.ResourceData, i interface{}) error {
return resourceServiceUpdate(data, i, serviceDef)
}
}
// resourceDelete satisfies the Terraform resource schema Delete "interface"
// while injecting the ServiceDefinition into the true Delete functionality.
func resourceDelete(serviceDef ServiceDefinition) schema.DeleteFunc {
return func(data *schema.ResourceData, i interface{}) error {
return resourceServiceDelete(data, i, serviceDef)
}
}
// resourceImport satisfies the Terraform resource schema Importer "interface"
// while injecting the ServiceDefinition into the true Import functionality.
func resourceImport(serviceDef ServiceDefinition) *schema.ResourceImporter {
return &schema.ResourceImporter{
State: func(d *schema.ResourceData, m interface{}) ([]*schema.ResourceData, error) {
error := resourceServiceRead(d, m, serviceDef, true)
if error != nil {
return nil, error
}
return []*schema.ResourceData{d}, nil
},
}
}
// resourceServiceCreate provides service resource Create functionality.
func resourceServiceCreate(d *schema.ResourceData, meta interface{}, serviceDef ServiceDefinition) error {
if err := validateVCLs(d); err != nil {
return err
}
conn := meta.(*FastlyClient).conn
service, err := conn.CreateService(&gofastly.CreateServiceInput{
Name: d.Get("name").(string),
Comment: d.Get("comment").(string),
Type: serviceDef.GetType(),
})
if err != nil {
return err
}
d.SetId(service.ID)
return resourceServiceUpdate(d, meta, serviceDef)
}
// resourceServiceUpdate provides service resource Update functionality.
func resourceServiceUpdate(d *schema.ResourceData, meta interface{}, serviceDef ServiceDefinition) error {
if err := validateVCLs(d); err != nil {
return err
}
conn := meta.(*FastlyClient).conn
// Update Name and/or Comment. No new version is required for this.
if d.HasChange("name") || d.HasChange("comment") {
_, err := conn.UpdateService(&gofastly.UpdateServiceInput{
ID: d.Id(),
Name: d.Get("name").(string),
Comment: d.Get("comment").(string),
})
if err != nil {
return err
}
}
// Once activated, Versions are locked and become immutable.
// This loops over all AttributeHandlers calling HasChange. In this way each attribute handler can contribute
// whether their current state and proposed changes mean a new version must be created.
// So where changes are required, a new version must be created first, and updates posted to that
// version. We only need one change to trigger this, so a break is OK.
var needsChange bool
for _, a := range serviceDef.GetAttributeHandler() {
if a.HasChange(d) {
needsChange = true
break
}
}
// Update the active version's comment. No new version is required for this.
if d.HasChange("version_comment") && !needsChange {
latestVersion := d.Get("active_version").(int)
if latestVersion == 0 {
// If the service was just created, there is an empty Version 1 available
// that is unlocked and can be updated.
latestVersion = 1
}
opts := gofastly.UpdateVersionInput{
Service: d.Id(),
Version: latestVersion,
Comment: d.Get("version_comment").(string),
}
log.Printf("[DEBUG] Update Version opts: %#v", opts)
_, err := conn.UpdateVersion(&opts)
if err != nil {
return err
}
}
initialVersion := false
if needsChange {
latestVersion := d.Get("active_version").(int)
if latestVersion == 0 {
initialVersion = true
// If the service was just created, there is an empty Version 1 available
// that is unlocked and can be updated.
latestVersion = 1
} else {
// Clone the latest version, giving us an unlocked version we can modify.
log.Printf("[DEBUG] Creating clone of version (%d) for updates", latestVersion)
newVersion, err := conn.CloneVersion(&gofastly.CloneVersionInput{
Service: d.Id(),
Version: latestVersion,
})
if err != nil {
return err
}
// The new version number is named "Number", but it's actually a string.
latestVersion = newVersion.Number
d.Set("cloned_version", latestVersion)
// New versions are not immediately found in the API, or are not
// immediately mutable, so we need to sleep a few and let Fastly ready
// itself. Typically, 7 seconds is enough.
log.Print("[DEBUG] Sleeping 7 seconds to allow Fastly Version to be available")
time.Sleep(7 * time.Second)
// Update the cloned version's comment.
if d.Get("version_comment").(string) != "" {
opts := gofastly.UpdateVersionInput{
Service: d.Id(),
Version: latestVersion,
Comment: d.Get("version_comment").(string),
}
log.Printf("[DEBUG] Update Version opts: %#v", opts)
_, err := conn.UpdateVersion(&opts)
if err != nil {
return err
}
}
}
// This delegates the bulk of processing to attribute handlers which manage state
// for their own attributes.
for _, a := range serviceDef.GetAttributeHandler() {
if a.MustProcess(d, initialVersion) {
if err := a.Process(d, latestVersion, conn); err != nil {
return err
}
}
}
// Validate version.
log.Printf("[DEBUG] Validating Fastly Service (%s), Version (%v)", d.Id(), latestVersion)
valid, msg, err := conn.ValidateVersion(&gofastly.ValidateVersionInput{
Service: d.Id(),
Version: latestVersion,
})
if err != nil {
return fmt.Errorf("[ERR] Error checking validation: %s", err)
}
if !valid {
return fmt.Errorf("[ERR] Invalid configuration for Fastly Service (%s): %s", d.Id(), msg)
}
shouldActivate := d.Get("activate").(bool)
if shouldActivate {
log.Printf("[DEBUG] Activating Fastly Service (%s), Version (%v)", d.Id(), latestVersion)
_, err = conn.ActivateVersion(&gofastly.ActivateVersionInput{
Service: d.Id(),
Version: latestVersion,
})
if err != nil {
return fmt.Errorf("[ERR] Error activating version (%d): %s", latestVersion, err)
}
// Only if the version is valid and activated do we set the active_version.
// This prevents us from getting stuck in cloning an invalid version.
d.Set("active_version", latestVersion)
} else {
log.Printf("[INFO] Skipping activation of Fastly Service (%s), Version (%v)", d.Id(), latestVersion)
log.Print("[INFO] The Terraform definition is explicitly specified to not activate the changes on Fastly")
log.Printf("[INFO] Version (%v) has been pushed and validated", latestVersion)
log.Printf("[INFO] Visit https://manage.fastly.com/configure/services/%s/versions/%v and activate it manually", d.Id(), latestVersion)
}
}
return resourceServiceRead(d, meta, serviceDef, false)
}
// resourceServiceRead provides service resource Read functionality.
func resourceServiceRead(d *schema.ResourceData, meta interface{}, serviceDef ServiceDefinition, isImport bool) error {
conn := meta.(*FastlyClient).conn
s, err := conn.GetServiceDetails(&gofastly.GetServiceInput{
ID: d.Id(),
})
if err != nil {
// Check if not found, if so, clear ID field and exit early.
if e, ok := err.(*gofastly.HTTPError); ok && e.IsNotFound() {
log.Printf("[WARN] %s for ID (%s)", fastlyNoServiceFoundErr, d.Id())
d.SetId("")
return nil
}
return err
}
// Check if deleted, if so, clear ID field and exit early.
if s.DeletedAt != nil {
log.Printf("[WARN] Service ID (%s) has been deleted", d.Id())
d.SetId("")
return nil
}
// Check for service type mismatch (i.e. when importing)
if s.Type != serviceDef.GetType() {
return fmt.Errorf("[ERR] Service type mismatch in READ, expected: %s, got: %s", serviceDef.GetType(), s.Type)
}
d.Set("name", s.Name)
d.Set("comment", s.Comment)
d.Set("version_comment", s.Version.Comment)
d.Set("active_version", s.ActiveVersion.Number)
if s.ActiveVersion.Number == 0 && isImport {
s.ActiveVersion.Number = s.Version.Number
}
// If CreateService succeeds, but initial updates to the Service fail, we'll
// have an empty ActiveService version (no version is active, so we can't
// query for information on it).
if s.ActiveVersion.Number != 0 {
// This delegates read to all the attribute handlers which can then manage reading state for
// their own attributes.
for _, a := range serviceDef.GetAttributeHandler() {
if err := a.Read(d, s, conn); err != nil {
return err
}
}
} else if !isImport {
log.Printf("[DEBUG] Active Version for Service (%s) is empty, no state to refresh", d.Id())
}
return nil
}
// resourceServiceDelete provides service resource Delete functionality.
func resourceServiceDelete(d *schema.ResourceData, meta interface{}, serviceDef ServiceDefinition) error {
conn := meta.(*FastlyClient).conn
// Fastly will fail to delete any service with an Active Version.
// If `force_destroy` is given, we deactivate the active version and then send
// the DELETE call.
if d.Get("force_destroy").(bool) {
s, err := conn.GetServiceDetails(&gofastly.GetServiceInput{
ID: d.Id(),
})
if err != nil {
return err
}
if s.ActiveVersion.Number != 0 {
_, err := conn.DeactivateVersion(&gofastly.DeactivateVersionInput{
Service: d.Id(),
Version: s.ActiveVersion.Number,
})
if err != nil {
return err
}
}
}
return conn.DeleteService(&gofastly.DeleteServiceInput{
ID: d.Id(),
})
}