provisioner/salt: install salt

config.go

@@ -38,7 +38,8 @@ const defaultConfig = `
 
 	"provisioners": {
 		"file": "packer-provisioner-file",
-		"shell": "packer-provisioner-shell"
+		"shell": "packer-provisioner-shell",
+		"salt": "packer-provisioner-salt"
 	}
 }
 `

plugin/provisioner-salt/main.go

+package main
+
+import (
+	"github.com/mitchellh/packer/packer/plugin"
+	"github.com/mitchellh/packer/provisioner/salt"
+)
+
+func main() {
+	plugin.ServeProvisioner(new(salt.Provisioner))
+}

provisioner/salt/provisioner.go

+// This package implements a provisioner for Packer that executes a
+// saltstack highstate within the remote machine
+package salt
+
+import (
+	"fmt"
+	"github.com/mitchellh/iochan"
+	"github.com/mitchellh/mapstructure"
+	"github.com/mitchellh/packer/packer"
+	"io"
+	"log"
+	"sort"
+	"strings"
+)
+
+var Ui packer.Ui
+
+type config struct {
+	// If true, skips installing Salt. Defaults to false.
+	SkipInstall bool `mapstructure:"skip_install"`
+}
+
+type Provisioner struct {
+	config config
+}
+
+func (p *Provisioner) Prepare(raws ...interface{}) error {
+	var md mapstructure.Metadata
+	decoderConfig := &mapstructure.DecoderConfig{
+		Metadata: &md,
+		Result:   &p.config,
+	}
+
+	decoder, err := mapstructure.NewDecoder(decoderConfig)
+	if err != nil {
+		return err
+	}
+
+	for _, raw := range raws {
+		err := decoder.Decode(raw)
+		if err != nil {
+			return err
+		}
+	}
+
+	// Accumulate any errors
+	errs := make([]error, 0)
+
+	// Unused keys are errors
+	if len(md.Unused) > 0 {
+		sort.Strings(md.Unused)
+		for _, unused := range md.Unused {
+			if unused != "type" && !strings.HasPrefix(unused, "packer_") {
+				errs = append(
+					errs, fmt.Errorf("Unknown configuration key: %s", unused))
+			}
+		}
+	}
+
+	if len(errs) > 0 {
+		return &packer.MultiError{errs}
+	}
+
+	return nil
+}
+
+func InstallSalt(comm packer.Communicator) (err error) {
+	Ui.Say("Installing Salt")
+	cmd := "wget -O - http://bootstrap.saltstack.org | sudo sh"
+	if err = executeCommand(cmd, comm); err != nil {
+		return fmt.Errorf("Unable to install Salt: %d", err)
+	}
+
+	return nil
+}
+
+func (p *Provisioner) Provision(ui packer.Ui, comm packer.Communicator) error {
+	var err error
+	Ui = ui
+
+	if !p.config.SkipInstall {
+		if err = InstallSalt(comm); err != nil {
+			return fmt.Errorf("Error installing Salt: %s", err)
+		}
+	}
+
+	return nil
+}
+
+func executeCommand(command string, comm packer.Communicator) (err error) {
+	// Setup the remote command
+	stdout_r, stdout_w := io.Pipe()
+	stderr_r, stderr_w := io.Pipe()
+
+	var cmd packer.RemoteCmd
+	cmd.Command = command
+	cmd.Stdout = stdout_w
+	cmd.Stderr = stderr_w
+
+	log.Printf("Executing command: %s", cmd.Command)
+	err = comm.Start(&cmd)
+	if err != nil {
+		return fmt.Errorf("Failed executing command: %s", err)
+	}
+
+	exitChan := make(chan int, 1)
+	stdoutChan := iochan.DelimReader(stdout_r, '\n')
+	stderrChan := iochan.DelimReader(stderr_r, '\n')
+
+	go func() {
+		defer stdout_w.Close()
+		defer stderr_w.Close()
+
+		cmd.Wait()
+		exitChan <- cmd.ExitStatus
+	}()
+
+OutputLoop:
+	for {
+		select {
+		case output := <-stderrChan:
+			Ui.Message(strings.TrimSpace(output))
+		case output := <-stdoutChan:
+			Ui.Message(strings.TrimSpace(output))
+		case exitStatus := <-exitChan:
+			log.Printf("Chef Solo provisioner exited with status %d", exitStatus)
+
+			if exitStatus != 0 {
+				return fmt.Errorf("Command exited with non-zero exit status: %d", exitStatus)
+			}
+
+			break OutputLoop
+		}
+	}
+
+	// Make sure we finish off stdout/stderr because we may have gotten
+	// a message from the exit channel first.
+	for output := range stdoutChan {
+		Ui.Message(output)
+	}
+
+	for output := range stderrChan {
+		Ui.Message(output)
+	}
+
+	return nil
+}