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run_config.go
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run_config.go
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package common
import (
"errors"
"fmt"
"github.com/mitchellh/packer/packer"
"os"
"time"
)
// RunConfig contains configuration for running an instance from a source
// AMI and details on how to access that launched image.
type RunConfig struct {
AssociatePublicIpAddress bool `mapstructure:"associate_public_ip_address"`
AvailabilityZone string `mapstructure:"availability_zone"`
IamInstanceProfile string `mapstructure:"iam_instance_profile"`
InstanceType string `mapstructure:"instance_type"`
RunTags map[string]string `mapstructure:"run_tags"`
SourceAmi string `mapstructure:"source_ami"`
RawSSHTimeout string `mapstructure:"ssh_timeout"`
SSHUsername string `mapstructure:"ssh_username"`
SSHPort int `mapstructure:"ssh_port"`
SecurityGroupId string `mapstructure:"security_group_id"`
SecurityGroupIds []string `mapstructure:"security_group_ids"`
SubnetId string `mapstructure:"subnet_id"`
TemporaryKeyPairName string `mapstructure:"temporary_key_pair_name"`
UserData string `mapstructure:"user_data"`
UserDataFile string `mapstructure:"user_data_file"`
VpcId string `mapstructure:"vpc_id"`
// Unexported fields that are calculated from others
sshTimeout time.Duration
}
func (c *RunConfig) Prepare(t *packer.ConfigTemplate) []error {
if t == nil {
var err error
t, err = packer.NewConfigTemplate()
if err != nil {
return []error{err}
}
}
// Defaults
if c.SSHPort == 0 {
c.SSHPort = 22
}
if c.RawSSHTimeout == "" {
c.RawSSHTimeout = "1m"
}
if c.TemporaryKeyPairName == "" {
c.TemporaryKeyPairName = "packer {{uuid}}"
}
// Validation
var err error
errs := make([]error, 0)
if c.SourceAmi == "" {
errs = append(errs, errors.New("A source_ami must be specified"))
}
if c.InstanceType == "" {
errs = append(errs, errors.New("An instance_type must be specified"))
}
if c.SSHUsername == "" {
errs = append(errs, errors.New("An ssh_username must be specified"))
}
if c.UserData != "" && c.UserDataFile != "" {
errs = append(errs, fmt.Errorf("Only one of user_data or user_data_file can be specified."))
} else if c.UserDataFile != "" {
if _, err := os.Stat(c.UserDataFile); err != nil {
errs = append(errs, fmt.Errorf("user_data_file not found: %s", c.UserDataFile))
}
}
if c.SecurityGroupId != "" {
if len(c.SecurityGroupIds) > 0 {
errs = append(errs, fmt.Errorf("Only one of security_group_id or security_group_ids can be specified."))
} else {
c.SecurityGroupIds = []string{c.SecurityGroupId}
c.SecurityGroupId = ""
}
}
templates := map[string]*string{
"iam_instance_profile": &c.IamInstanceProfile,
"instance_type": &c.InstanceType,
"ssh_timeout": &c.RawSSHTimeout,
"ssh_username": &c.SSHUsername,
"source_ami": &c.SourceAmi,
"subnet_id": &c.SubnetId,
"temporary_key_pair_name": &c.TemporaryKeyPairName,
"vpc_id": &c.VpcId,
"availability_zone": &c.AvailabilityZone,
}
for n, ptr := range templates {
var err error
*ptr, err = t.Process(*ptr, nil)
if err != nil {
errs = append(
errs, fmt.Errorf("Error processing %s: %s", n, err))
}
}
sliceTemplates := map[string][]string{
"security_group_ids": c.SecurityGroupIds,
}
for n, slice := range sliceTemplates {
for i, elem := range slice {
var err error
slice[i], err = t.Process(elem, nil)
if err != nil {
errs = append(
errs, fmt.Errorf("Error processing %s[%d]: %s", n, i, err))
}
}
}
newTags := make(map[string]string)
for k, v := range c.RunTags {
k, err := t.Process(k, nil)
if err != nil {
errs = append(errs,
fmt.Errorf("Error processing tag key %s: %s", k, err))
continue
}
v, err := t.Process(v, nil)
if err != nil {
errs = append(errs,
fmt.Errorf("Error processing tag value '%s': %s", v, err))
continue
}
newTags[k] = v
}
c.RunTags = newTags
c.sshTimeout, err = time.ParseDuration(c.RawSSHTimeout)
if err != nil {
errs = append(errs, fmt.Errorf("Failed parsing ssh_timeout: %s", err))
}
return errs
}
func (c *RunConfig) SSHTimeout() time.Duration {
return c.sshTimeout
}