149 lines
3.9 KiB
Go
149 lines
3.9 KiB
Go
//go:generate mapstructure-to-hcl2 -type Config
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package linode
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import (
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"crypto/rand"
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"encoding/base64"
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"errors"
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"fmt"
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"os"
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"regexp"
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"time"
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"github.com/hashicorp/packer-plugin-sdk/common"
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"github.com/hashicorp/packer-plugin-sdk/communicator"
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packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
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"github.com/hashicorp/packer-plugin-sdk/template/config"
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"github.com/hashicorp/packer-plugin-sdk/template/interpolate"
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)
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type Config struct {
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common.PackerConfig `mapstructure:",squash"`
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ctx interpolate.Context
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Comm communicator.Config `mapstructure:",squash"`
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PersonalAccessToken string `mapstructure:"linode_token"`
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Region string `mapstructure:"region"`
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InstanceType string `mapstructure:"instance_type"`
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Label string `mapstructure:"instance_label"`
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Tags []string `mapstructure:"instance_tags"`
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Image string `mapstructure:"image"`
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SwapSize int `mapstructure:"swap_size"`
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RootPass string `mapstructure:"root_pass"`
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RootSSHKey string `mapstructure:"root_ssh_key"`
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ImageLabel string `mapstructure:"image_label"`
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Description string `mapstructure:"image_description"`
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StateTimeout time.Duration `mapstructure:"state_timeout" required:"false"`
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}
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func createRandomRootPassword() (string, error) {
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rawRootPass := make([]byte, 50)
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_, err := rand.Read(rawRootPass)
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if err != nil {
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return "", fmt.Errorf("Failed to generate random password")
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}
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rootPass := base64.StdEncoding.EncodeToString(rawRootPass)
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return rootPass, nil
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}
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func (c *Config) Prepare(raws ...interface{}) ([]string, error) {
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if err := config.Decode(c, &config.DecodeOpts{
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Interpolate: true,
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InterpolateContext: &c.ctx,
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InterpolateFilter: &interpolate.RenderFilter{
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Exclude: []string{
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"run_command",
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},
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},
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}, raws...); err != nil {
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return nil, err
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}
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var errs *packersdk.MultiError
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// Defaults
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if c.PersonalAccessToken == "" {
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// Default to environment variable for linode_token, if it exists
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c.PersonalAccessToken = os.Getenv("LINODE_TOKEN")
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}
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if c.ImageLabel == "" {
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if def, err := interpolate.Render("packer-{{timestamp}}", nil); err == nil {
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c.ImageLabel = def
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} else {
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errs = packersdk.MultiErrorAppend(errs, fmt.Errorf("Unable to render image name: %s", err))
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}
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}
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if c.Label == "" {
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// Default to packer-[time-ordered-uuid]
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if def, err := interpolate.Render("packer-{{timestamp}}", nil); err == nil {
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c.Label = def
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} else {
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errs = packersdk.MultiErrorAppend(errs, fmt.Errorf("Unable to render Linode label: %s", err))
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}
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}
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if c.RootPass == "" {
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var err error
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c.RootPass, err = createRandomRootPassword()
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if err != nil {
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errs = packersdk.MultiErrorAppend(errs, fmt.Errorf("Unable to generate root_pass: %s", err))
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}
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}
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if c.StateTimeout == 0 {
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// Default to 5 minute timeouts waiting for state change
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c.StateTimeout = 5 * time.Minute
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}
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if es := c.Comm.Prepare(&c.ctx); len(es) > 0 {
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errs = packersdk.MultiErrorAppend(errs, es...)
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}
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c.Comm.SSHPassword = c.RootPass
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if c.PersonalAccessToken == "" {
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// Required configurations that will display errors if not set
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errs = packersdk.MultiErrorAppend(
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errs, errors.New("linode_token is required"))
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}
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if c.Region == "" {
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errs = packersdk.MultiErrorAppend(
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errs, errors.New("region is required"))
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}
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if c.InstanceType == "" {
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errs = packersdk.MultiErrorAppend(
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errs, errors.New("instance_type is required"))
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}
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if c.Image == "" {
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errs = packersdk.MultiErrorAppend(
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errs, errors.New("image is required"))
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}
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if c.Tags == nil {
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c.Tags = make([]string, 0)
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}
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tagRe := regexp.MustCompile("^[[:alnum:]:_-]{1,255}$")
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for _, t := range c.Tags {
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if !tagRe.MatchString(t) {
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errs = packersdk.MultiErrorAppend(errs, fmt.Errorf("invalid tag: %s", t))
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}
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}
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if errs != nil && len(errs.Errors) > 0 {
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return nil, errs
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}
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packersdk.LogSecretFilter.Set(c.PersonalAccessToken)
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return nil, nil
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}
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