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package googlecompute
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import (
"errors"
"fmt"
"os"
"regexp"
"time"
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"github.com/hashicorp/packer/common"
"github.com/hashicorp/packer/common/uuid"
"github.com/hashicorp/packer/helper/communicator"
"github.com/hashicorp/packer/helper/config"
"github.com/hashicorp/packer/packer"
"github.com/hashicorp/packer/template/interpolate"
compute "google.golang.org/api/compute/v1"
)
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var reImageFamily = regexp . MustCompile ( ` ^[a-z]([-a-z0-9] { 0,61}[a-z0-9])?$ ` )
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// Config is the configuration structure for the GCE builder. It stores
// both the publicly settable state as well as the privately generated
// state of the config object.
type Config struct {
common . PackerConfig ` mapstructure:",squash" `
Comm communicator . Config ` mapstructure:",squash" `
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// The JSON file containing your account
// credentials. Not required if you run Packer on a GCE instance with a
// service account. Instructions for creating the file or using service
// accounts are above.
AccountFile string ` mapstructure:"account_file" required:"false" `
// The project ID that will be used to launch
// instances and store images.
ProjectId string ` mapstructure:"project_id" required:"true" `
// Full or partial URL of the guest accelerator
// type. GPU accelerators can only be used with
// "on_host_maintenance": "TERMINATE" option set. Example:
// "projects/project_id/zones/europe-west1-b/acceleratorTypes/nvidia-tesla-k80"
AcceleratorType string ` mapstructure:"accelerator_type" required:"false" `
// Number of guest accelerator cards to add to
// the launched instance.
AcceleratorCount int64 ` mapstructure:"accelerator_count" required:"false" `
// The name of a pre-allocated static external IP
// address. Note, must be the name and not the actual IP address.
Address string ` mapstructure:"address" required:"false" `
// If true, the default service
// account will not be used if service_account_email is not specified. Set
// this value to true and omit service_account_email to provision a VM with
// no service account.
DisableDefaultServiceAccount bool ` mapstructure:"disable_default_service_account" required:"false" `
// The name of the disk, if unset the instance name
// will be used.
DiskName string ` mapstructure:"disk_name" required:"false" `
// The size of the disk in GB. This defaults to 10,
// which is 10GB.
DiskSizeGb int64 ` mapstructure:"disk_size" required:"false" `
// Type of disk used to back your instance, like
// pd-ssd or pd-standard. Defaults to pd-standard.
DiskType string ` mapstructure:"disk_type" required:"false" `
// The unique name of the resulting image. Defaults to
// "packer-{{timestamp}}".
ImageName string ` mapstructure:"image_name" required:"false" `
// The description of the resulting image.
ImageDescription string ` mapstructure:"image_description" required:"false" `
// Image encryption key to apply to the created image. Possible values:
ImageEncryptionKey * compute . CustomerEncryptionKey ` mapstructure:"image_encryption_key" required:"false" `
// The name of the image family to which the
// resulting image belongs. You can create disks by specifying an image family
// instead of a specific image name. The image family always returns its
// latest image that is not deprecated.
ImageFamily string ` mapstructure:"image_family" required:"false" `
// Key/value pair labels to
// apply to the created image.
ImageLabels map [ string ] string ` mapstructure:"image_labels" required:"false" `
// Licenses to apply to the created
// image.
ImageLicenses [ ] string ` mapstructure:"image_licenses" required:"false" `
// A name to give the launched instance. Beware
// that this must be unique. Defaults to "packer-{{uuid}}".
InstanceName string ` mapstructure:"instance_name" required:"false" `
// Key/value pair labels to apply to
// the launched instance.
Labels map [ string ] string ` mapstructure:"labels" required:"false" `
// The machine type. Defaults to "n1-standard-1".
MachineType string ` mapstructure:"machine_type" required:"false" `
// Metadata applied to the launched
// instance.
Metadata map [ string ] string ` mapstructure:"metadata" required:"false" `
// A Minimum CPU Platform for VM Instance.
// Availability and default CPU platforms vary across zones, based on the
// hardware available in each GCP zone.
// Details
MinCpuPlatform string ` mapstructure:"min_cpu_platform" required:"false" `
// The Google Compute network id or URL to use for the
// launched instance. Defaults to "default". If the value is not a URL, it
// will be interpolated to
// projects/((network_project_id))/global/networks/((network)). This value
// is not required if a subnet is specified.
Network string ` mapstructure:"network" required:"false" `
// The project ID for the network and
// subnetwork to use for launched instance. Defaults to project_id.
NetworkProjectId string ` mapstructure:"network_project_id" required:"false" `
// If true, the instance will not have an
// external IP. use_internal_ip must be true if this property is true.
OmitExternalIP bool ` mapstructure:"omit_external_ip" required:"false" `
// Sets Host Maintenance Option. Valid
// choices are MIGRATE and TERMINATE. Please see GCE Instance Scheduling
// Options,
// as not all machine_types support MIGRATE (i.e. machines with GPUs). If
// preemptible is true this can only be TERMINATE. If preemptible is false,
// it defaults to MIGRATE
OnHostMaintenance string ` mapstructure:"on_host_maintenance" required:"false" `
// If true, launch a preemptible instance.
Preemptible bool ` mapstructure:"preemptible" required:"false" `
// The time to wait for instance state changes.
// Defaults to "5m".
RawStateTimeout string ` mapstructure:"state_timeout" required:"false" `
// The region in which to launch the instance. Defaults to
// the region hosting the specified zone.
Region string ` mapstructure:"region" required:"false" `
// The service account scopes for launched
// instance. Defaults to:
Scopes [ ] string ` mapstructure:"scopes" required:"false" `
// The service account to be used for
// launched instance. Defaults to the project's default service account unless
// disable_default_service_account is true.
ServiceAccountEmail string ` mapstructure:"service_account_email" required:"false" `
// The source image to use to create the new image
// from. You can also specify source_image_family instead. If both
// source_image and source_image_family are specified, source_image
// takes precedence. Example: "debian-8-jessie-v20161027"
SourceImage string ` mapstructure:"source_image" required:"true" `
// The source image family to use to create
// the new image from. The image family always returns its latest image that
// is not deprecated. Example: "debian-8".
SourceImageFamily string ` mapstructure:"source_image_family" required:"true" `
// The project ID of the project
// containing the source image.
SourceImageProjectId string ` mapstructure:"source_image_project_id" required:"false" `
// The path to a startup script to run on the
// VM from which the image will be made.
StartupScriptFile string ` mapstructure:"startup_script_file" required:"false" `
// The Google Compute subnetwork id or URL to use for
// the launched instance. Only required if the network has been created with
// custom subnetting. Note, the region of the subnetwork must match the
// region or zone in which the VM is launched. If the value is not a URL,
// it will be interpolated to
// projects/((network_project_id))/regions/((region))/subnetworks/((subnetwork))
Subnetwork string ` mapstructure:"subnetwork" required:"false" `
// Assign network tags to apply firewall rules to
// VM instance.
Tags [ ] string ` mapstructure:"tags" required:"false" `
// If true, use the instance's internal IP
// instead of its external IP during building.
UseInternalIP bool ` mapstructure:"use_internal_ip" required:"false" `
// The zone in which to launch the instance used to create
// the image. Example: "us-central1-a"
Zone string ` mapstructure:"zone" required:"true" `
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Account AccountFile
stateTimeout time . Duration
imageAlreadyExists bool
ctx interpolate . Context
}
func NewConfig ( raws ... interface { } ) ( * Config , [ ] string , error ) {
c := new ( Config )
c . ctx . Funcs = TemplateFuncs
err := config . Decode ( c , & config . DecodeOpts {
Interpolate : true ,
InterpolateContext : & c . ctx ,
InterpolateFilter : & interpolate . RenderFilter {
Exclude : [ ] string {
"run_command" ,
} ,
} ,
} , raws ... )
if err != nil {
return nil , nil , err
}
var errs * packer . MultiError
// Set defaults.
if c . Network == "" && c . Subnetwork == "" {
c . Network = "default"
}
if c . NetworkProjectId == "" {
c . NetworkProjectId = c . ProjectId
}
if c . DiskSizeGb == 0 {
c . DiskSizeGb = 10
}
if c . DiskType == "" {
c . DiskType = "pd-standard"
}
if c . ImageDescription == "" {
c . ImageDescription = "Created by Packer"
}
if c . OnHostMaintenance == "MIGRATE" && c . Preemptible {
errs = packer . MultiErrorAppend ( errs ,
errors . New ( "on_host_maintenance must be TERMINATE when using preemptible instances." ) )
}
// Setting OnHostMaintenance Correct Defaults
// "MIGRATE" : Possible and default if Preemptible is false
// "TERMINATE": Required if Preemptible is true
if c . Preemptible {
c . OnHostMaintenance = "TERMINATE"
} else {
if c . OnHostMaintenance == "" {
c . OnHostMaintenance = "MIGRATE"
}
}
// Make sure user sets a valid value for on_host_maintenance option
if ! ( c . OnHostMaintenance == "MIGRATE" || c . OnHostMaintenance == "TERMINATE" ) {
errs = packer . MultiErrorAppend ( errs ,
errors . New ( "on_host_maintenance must be one of MIGRATE or TERMINATE." ) )
}
if c . ImageName == "" {
img , err := interpolate . Render ( "packer-{{timestamp}}" , nil )
if err != nil {
errs = packer . MultiErrorAppend ( errs ,
fmt . Errorf ( "Unable to parse image name: %s " , err ) )
} else {
c . ImageName = img
}
}
if len ( c . ImageFamily ) > 63 {
errs = packer . MultiErrorAppend ( errs ,
errors . New ( "Invalid image family: Must not be longer than 63 characters" ) )
}
if c . ImageFamily != "" {
if ! reImageFamily . MatchString ( c . ImageFamily ) {
errs = packer . MultiErrorAppend ( errs ,
errors . New ( "Invalid image family: The first character must be a lowercase letter, and all following characters must be a dash, lowercase letter, or digit, except the last character, which cannot be a dash" ) )
}
}
if c . InstanceName == "" {
c . InstanceName = fmt . Sprintf ( "packer-%s" , uuid . TimeOrderedUUID ( ) )
}
if c . DiskName == "" {
c . DiskName = c . InstanceName
}
if c . MachineType == "" {
c . MachineType = "n1-standard-1"
}
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if c . RawStateTimeout == "" {
c . RawStateTimeout = "5m"
}
if es := c . Comm . Prepare ( & c . ctx ) ; len ( es ) > 0 {
errs = packer . MultiErrorAppend ( errs , es ... )
}
// Process required parameters.
if c . ProjectId == "" {
errs = packer . MultiErrorAppend (
errs , errors . New ( "a project_id must be specified" ) )
}
if c . Scopes == nil {
c . Scopes = [ ] string {
"https://www.googleapis.com/auth/userinfo.email" ,
"https://www.googleapis.com/auth/compute" ,
"https://www.googleapis.com/auth/devstorage.full_control" ,
}
}
if c . SourceImage == "" && c . SourceImageFamily == "" {
errs = packer . MultiErrorAppend (
errs , errors . New ( "a source_image or source_image_family must be specified" ) )
}
if c . Zone == "" {
errs = packer . MultiErrorAppend (
errs , errors . New ( "a zone must be specified" ) )
}
if c . Region == "" && len ( c . Zone ) > 2 {
// get region from Zone
region := c . Zone [ : len ( c . Zone ) - 2 ]
c . Region = region
}
err = c . CalcTimeout ( )
if err != nil {
errs = packer . MultiErrorAppend ( errs , err )
}
if c . AccountFile != "" {
if err := ProcessAccountFile ( & c . Account , c . AccountFile ) ; err != nil {
errs = packer . MultiErrorAppend ( errs , err )
}
}
if c . OmitExternalIP && c . Address != "" {
errs = packer . MultiErrorAppend ( fmt . Errorf ( "you can not specify an external address when 'omit_external_ip' is true" ) )
}
if c . OmitExternalIP && ! c . UseInternalIP {
errs = packer . MultiErrorAppend ( fmt . Errorf ( "'use_internal_ip' must be true if 'omit_external_ip' is true" ) )
}
if c . AcceleratorCount > 0 && len ( c . AcceleratorType ) == 0 {
errs = packer . MultiErrorAppend ( fmt . Errorf ( "'accelerator_type' must be set when 'accelerator_count' is more than 0" ) )
}
if c . AcceleratorCount > 0 && c . OnHostMaintenance != "TERMINATE" {
errs = packer . MultiErrorAppend ( fmt . Errorf ( "'on_host_maintenance' must be set to 'TERMINATE' when 'accelerator_count' is more than 0" ) )
}
// If DisableDefaultServiceAccount is provided, don't allow a value for ServiceAccountEmail
if c . DisableDefaultServiceAccount && c . ServiceAccountEmail != "" {
errs = packer . MultiErrorAppend ( fmt . Errorf ( "you may not specify a 'service_account_email' when 'disable_default_service_account' is true" ) )
}
if c . StartupScriptFile != "" {
if _ , err := os . Stat ( c . StartupScriptFile ) ; err != nil {
errs = packer . MultiErrorAppend (
errs , fmt . Errorf ( "startup_script_file: %v" , err ) )
}
}
// Check for any errors.
if errs != nil && len ( errs . Errors ) > 0 {
return nil , nil , errs
}
return c , nil , nil
}
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func ( c * Config ) CalcTimeout ( ) error {
stateTimeout , err := time . ParseDuration ( c . RawStateTimeout )
if err != nil {
return fmt . Errorf ( "Failed parsing state_timeout: %s" , err )
}
c . stateTimeout = stateTimeout
return nil
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}