packer-cn/provisioner/ansible-local/provisioner.go

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package ansiblelocal
import (
"fmt"
"github.com/mitchellh/packer/common"
"github.com/mitchellh/packer/packer"
"os"
"path/filepath"
"strings"
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)
const DefaultStagingDir = "/tmp/packer-provisioner-ansible-local"
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type Config struct {
common.PackerConfig `mapstructure:",squash"`
tpl *packer.ConfigTemplate
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// The command to run ansible
Command string
// Extra options to pass to the ansible command
ExtraArguments []string `mapstructure:"extra_arguments"`
// Path to group_vars directory
GroupVars string `mapstructure:"group_vars"`
// Path to host_vars directory
HostVars string `mapstructure:"host_vars"`
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// The main playbook file to execute.
PlaybookFile string `mapstructure:"playbook_file"`
// An array of local paths of playbook files to upload.
PlaybookPaths []string `mapstructure:"playbook_paths"`
// An array of local paths of roles to upload.
RolePaths []string `mapstructure:"role_paths"`
// The directory where files will be uploaded. Packer requires write
// permissions in this directory.
StagingDir string `mapstructure:"staging_directory"`
}
type Provisioner struct {
config Config
}
func (p *Provisioner) Prepare(raws ...interface{}) error {
md, err := common.DecodeConfig(&p.config, raws...)
if err != nil {
return err
}
p.config.tpl, err = packer.NewConfigTemplate()
if err != nil {
return err
}
p.config.tpl.UserVars = p.config.PackerUserVars
// Accumulate any errors
errs := common.CheckUnusedConfig(md)
// Defaults
if p.config.Command == "" {
p.config.Command = "ansible-playbook"
}
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if p.config.StagingDir == "" {
p.config.StagingDir = DefaultStagingDir
}
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// Templates
templates := map[string]*string{
"command": &p.config.Command,
"group_vars": &p.config.GroupVars,
"host_vars": &p.config.HostVars,
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"playbook_file": &p.config.PlaybookFile,
"staging_dir": &p.config.StagingDir,
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}
for n, ptr := range templates {
var err error
*ptr, err = p.config.tpl.Process(*ptr, nil)
if err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Error processing %s: %s", n, err))
}
}
sliceTemplates := map[string][]string{
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"extra_arguments": p.config.ExtraArguments,
"playbook_paths": p.config.PlaybookPaths,
"role_paths": p.config.RolePaths,
}
for n, slice := range sliceTemplates {
for i, elem := range slice {
var err error
slice[i], err = p.config.tpl.Process(elem, nil)
if err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Error processing %s[%d]: %s", n, i, err))
}
}
}
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// Validation
err = validateFileConfig(p.config.PlaybookFile, "playbook_file", true)
if err != nil {
errs = packer.MultiErrorAppend(errs, err)
}
// Check that the group_vars directory exists, if configured
if len(p.config.GroupVars) > 0 {
if err := validateDirConfig(p.config.GroupVars, "group_vars"); err != nil {
errs = packer.MultiErrorAppend(errs, err)
}
}
// Check that the host_vars directory exists, if configured
if len(p.config.HostVars) > 0 {
if err := validateDirConfig(p.config.HostVars, "host_vars"); err != nil {
errs = packer.MultiErrorAppend(errs, err)
}
}
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for _, path := range p.config.PlaybookPaths {
err := validateDirConfig(path, "playbook_paths")
if err != nil {
errs = packer.MultiErrorAppend(errs, err)
}
}
for _, path := range p.config.RolePaths {
if err := validateDirConfig(path, "role_paths"); err != nil {
errs = packer.MultiErrorAppend(errs, err)
}
}
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if errs != nil && len(errs.Errors) > 0 {
return errs
}
return nil
}
func (p *Provisioner) Provision(ui packer.Ui, comm packer.Communicator) error {
ui.Say("Provisioning with Ansible...")
ui.Message("Creating Ansible staging directory...")
if err := p.createDir(ui, comm, p.config.StagingDir); err != nil {
return fmt.Errorf("Error creating staging directory: %s", err)
}
ui.Message("Uploading main Playbook file...")
src := p.config.PlaybookFile
dst := filepath.Join(p.config.StagingDir, filepath.Base(src))
if err := p.uploadFile(ui, comm, dst, src); err != nil {
return fmt.Errorf("Error uploading main playbook: %s", err)
}
if len(p.config.GroupVars) > 0 {
ui.Message("Uploading group_vars directory...")
src := p.config.GroupVars
dst := filepath.Join(p.config.StagingDir, "group_vars")
if err := p.uploadDir(ui, comm, dst, src); err != nil {
return fmt.Errorf("Error uploading group_vars directory: %s", err)
}
}
if len(p.config.HostVars) > 0 {
ui.Message("Uploading host_vars directory...")
src := p.config.HostVars
dst := filepath.Join(p.config.StagingDir, "host_vars")
if err := p.uploadDir(ui, comm, dst, src); err != nil {
return fmt.Errorf("Error uploading host_vars directory: %s", err)
}
}
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if len(p.config.RolePaths) > 0 {
ui.Message("Uploading role directories...")
for _, src := range p.config.RolePaths {
dst := filepath.Join(p.config.StagingDir, "roles", filepath.Base(src))
if err := p.uploadDir(ui, comm, dst, src); err != nil {
return fmt.Errorf("Error uploading roles: %s", err)
}
}
}
if len(p.config.PlaybookPaths) > 0 {
ui.Message("Uploading additional Playbooks...")
if err := p.createDir(ui, comm, filepath.Join(p.config.StagingDir, "playbooks")); err != nil {
return fmt.Errorf("Error creating playbooks directory: %s", err)
}
for _, src := range p.config.PlaybookPaths {
dst := filepath.Join(p.config.StagingDir, "playbooks", filepath.Base(src))
if err := p.uploadDir(ui, comm, dst, src); err != nil {
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return fmt.Errorf("Error uploading playbooks: %s", err)
}
}
}
if err := p.executeAnsible(ui, comm); err != nil {
return fmt.Errorf("Error executing Ansible: %s", err)
}
return nil
}
func (p *Provisioner) Cancel() {
// Just hard quit. It isn't a big deal if what we're doing keeps
// running on the other side.
os.Exit(0)
}
func (p *Provisioner) executeAnsible(ui packer.Ui, comm packer.Communicator) error {
playbook := filepath.Join(p.config.StagingDir, filepath.Base(p.config.PlaybookFile))
// The inventory must be set to "127.0.0.1,". The comma is important
// as its the only way to override the ansible inventory when dealing
// with a single host.
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extraArgs := ""
if len(p.config.ExtraArguments) > 0 {
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extraArgs = " " + strings.Join(p.config.ExtraArguments, " ")
}
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command := fmt.Sprintf("%s %s%s -c local -i \"127.0.0.1,\"",
p.config.Command, playbook, extraArgs)
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ui.Message(fmt.Sprintf("Executing Ansible: %s", command))
cmd := &packer.RemoteCmd{
Command: command,
}
if err := cmd.StartWithUi(comm, ui); err != nil {
return err
}
if cmd.ExitStatus != 0 {
if cmd.ExitStatus == 127 {
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return fmt.Errorf("%s could not be found. Verify that it is available on the\n"+
"PATH after connecting to the machine.",
p.config.Command)
}
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return fmt.Errorf("Non-zero exit status: %d", cmd.ExitStatus)
}
return nil
}
func validateDirConfig(path string, config string) error {
info, err := os.Stat(path)
if err != nil {
return fmt.Errorf("%s: %s is invalid: %s", config, path, err)
} else if !info.IsDir() {
return fmt.Errorf("%s: %s must point to a directory", config, path)
}
return nil
}
func validateFileConfig(name string, config string, req bool) error {
if req {
if name == "" {
return fmt.Errorf("%s must be specified.", config)
}
}
info, err := os.Stat(name)
if err != nil {
return fmt.Errorf("%s: %s is invalid: %s", config, name, err)
} else if info.IsDir() {
return fmt.Errorf("%s: %s must point to a file", config, name)
}
return nil
}
func (p *Provisioner) uploadFile(ui packer.Ui, comm packer.Communicator, dst, src string) error {
f, err := os.Open(src)
if err != nil {
return fmt.Errorf("Error opening: %s", err)
}
defer f.Close()
if err = comm.Upload(dst, f); err != nil {
return fmt.Errorf("Error uploading %s: %s", src, err)
}
return nil
}
func (p *Provisioner) createDir(ui packer.Ui, comm packer.Communicator, dir string) error {
ui.Message(fmt.Sprintf("Creating directory: %s", dir))
cmd := &packer.RemoteCmd{
Command: fmt.Sprintf("mkdir -p '%s'", dir),
}
if err := cmd.StartWithUi(comm, ui); err != nil {
return err
}
if cmd.ExitStatus != 0 {
return fmt.Errorf("Non-zero exit status.")
}
return nil
}
func (p *Provisioner) uploadDir(ui packer.Ui, comm packer.Communicator, dst, src string) error {
if err := p.createDir(ui, comm, dst); err != nil {
return err
}
// Make sure there is a trailing "/" so that the directory isn't
// created on the other side.
if src[len(src)-1] != '/' {
src = src + "/"
}
return comm.UploadDir(dst, src, nil)
}