github.com/chalford/terraform@v0.3.7-0.20150113080010-a78c69a8c81f/builtin/provisioners/file/resource_provisioner.go (about)

     1  package file
     2  
     3  import (
     4  	"fmt"
     5  	"log"
     6  	"os"
     7  	"time"
     8  
     9  	"github.com/hashicorp/terraform/helper/config"
    10  	helper "github.com/hashicorp/terraform/helper/ssh"
    11  	"github.com/hashicorp/terraform/terraform"
    12  )
    13  
    14  type ResourceProvisioner struct{}
    15  
    16  func (p *ResourceProvisioner) Apply(
    17  	o terraform.UIOutput,
    18  	s *terraform.InstanceState,
    19  	c *terraform.ResourceConfig) error {
    20  	// Ensure the connection type is SSH
    21  	if err := helper.VerifySSH(s); err != nil {
    22  		return err
    23  	}
    24  
    25  	// Get the SSH configuration
    26  	conf, err := helper.ParseSSHConfig(s)
    27  	if err != nil {
    28  		return err
    29  	}
    30  
    31  	// Get the source and destination
    32  	sRaw := c.Config["source"]
    33  	src, ok := sRaw.(string)
    34  	if !ok {
    35  		return fmt.Errorf("Unsupported 'source' type! Must be string.")
    36  	}
    37  
    38  	dRaw := c.Config["destination"]
    39  	dst, ok := dRaw.(string)
    40  	if !ok {
    41  		return fmt.Errorf("Unsupported 'destination' type! Must be string.")
    42  	}
    43  	return p.copyFiles(conf, src, dst)
    44  }
    45  
    46  func (p *ResourceProvisioner) Validate(c *terraform.ResourceConfig) (ws []string, es []error) {
    47  	v := &config.Validator{
    48  		Required: []string{
    49  			"source",
    50  			"destination",
    51  		},
    52  	}
    53  	return v.Validate(c)
    54  }
    55  
    56  // copyFiles is used to copy the files from a source to a destination
    57  func (p *ResourceProvisioner) copyFiles(conf *helper.SSHConfig, src, dst string) error {
    58  	// Get the SSH client config
    59  	config, err := helper.PrepareConfig(conf)
    60  	if err != nil {
    61  		return err
    62  	}
    63  
    64  	// Wait and retry until we establish the SSH connection
    65  	var comm *helper.SSHCommunicator
    66  	err = retryFunc(conf.TimeoutVal, func() error {
    67  		host := fmt.Sprintf("%s:%d", conf.Host, conf.Port)
    68  		comm, err = helper.New(host, config)
    69  		return err
    70  	})
    71  	if err != nil {
    72  		return err
    73  	}
    74  
    75  	info, err := os.Stat(src)
    76  	if err != nil {
    77  		return err
    78  	}
    79  
    80  	// If we're uploading a directory, short circuit and do that
    81  	if info.IsDir() {
    82  		if err := comm.UploadDir(dst, src, nil); err != nil {
    83  			return fmt.Errorf("Upload failed: %v", err)
    84  		}
    85  		return nil
    86  	}
    87  
    88  	// We're uploading a file...
    89  	f, err := os.Open(src)
    90  	if err != nil {
    91  		return err
    92  	}
    93  	defer f.Close()
    94  
    95  	err = comm.Upload(dst, f)
    96  	if err != nil {
    97  		return fmt.Errorf("Upload failed: %v", err)
    98  	}
    99  	return err
   100  }
   101  
   102  // retryFunc is used to retry a function for a given duration
   103  func retryFunc(timeout time.Duration, f func() error) error {
   104  	finish := time.After(timeout)
   105  	for {
   106  		err := f()
   107  		if err == nil {
   108  			return nil
   109  		}
   110  		log.Printf("Retryable error: %v", err)
   111  
   112  		select {
   113  		case <-finish:
   114  			return err
   115  		case <-time.After(3 * time.Second):
   116  		}
   117  	}
   118  }