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package googlecompute
import (
"errors"
"fmt"
"regexp"
"time"
"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"
)
var reImageFamily = regexp.MustCompile(`^[a-z]([-a-z0-9]{0,61}[a-z0-9])?$`)
// 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"`
AccountFile string `mapstructure:"account_file"`
ProjectId string `mapstructure:"project_id"`
Address string `mapstructure:"address"`
DiskName string `mapstructure:"disk_name"`
DiskSizeGb int64 `mapstructure:"disk_size"`
DiskType string `mapstructure:"disk_type"`
ImageName string `mapstructure:"image_name"`
ImageDescription string `mapstructure:"image_description"`
ImageFamily string `mapstructure:"image_family"`
InstanceName string `mapstructure:"instance_name"`
MachineType string `mapstructure:"machine_type"`
Metadata map[string]string `mapstructure:"metadata"`
Network string `mapstructure:"network"`
NetworkProjectId string `mapstructure:"network_project_id"`
OmitExternalIP bool `mapstructure:"omit_external_ip"`
OnHostMaintenance string `mapstructure:"on_host_maintenance"`
Preemptible bool `mapstructure:"preemptible"`
RawStateTimeout string `mapstructure:"state_timeout"`
Region string `mapstructure:"region"`
Scopes []string `mapstructure:"scopes"`
SourceImage string `mapstructure:"source_image"`
SourceImageFamily string `mapstructure:"source_image_family"`
SourceImageProjectId string `mapstructure:"source_image_project_id"`
StartupScriptFile string `mapstructure:"startup_script_file"`
Subnetwork string `mapstructure:"subnetwork"`
Tags []string `mapstructure:"tags"`
UseInternalIP bool `mapstructure:"use_internal_ip"`
Zone string `mapstructure:"zone"`
Account AccountFile
stateTimeout time.Duration
imageAlreadyExists bool
ctx interpolate.Context
}
func NewConfig(raws ...interface{}) (*Config, []string, error) {
c := new(Config)
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.Network = "default"
}
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"
}
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"))
}
// Check for any errors.
if errs != nil && len(errs.Errors) > 0 {
return nil, nil, errs
}
return c, nil, nil
}
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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