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helper/ssh: add random number to upload path for script [GH-1545] #1588

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merged 1 commit into from
Apr 20, 2015
Merged

helper/ssh: add random number to upload path for script [GH-1545] #1588

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8 changes: 5 additions & 3 deletions builtin/provisioners/remote-exec/resource_provisioner.go
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Original file line number Diff line number Diff line change
Expand Up @@ -213,11 +213,13 @@ func (p *ResourceProvisioner) runScripts(
go p.copyOutput(o, errR, errDoneCh)

err := retryFunc(conf.TimeoutVal, func() error {
if err := comm.Upload(conf.ScriptPath, script); err != nil {
remotePath := conf.RemotePath()

if err := comm.Upload(remotePath, script); err != nil {
return fmt.Errorf("Failed to upload script: %v", err)
}
cmd = &helper.RemoteCmd{
Command: fmt.Sprintf("chmod 0777 %s", conf.ScriptPath),
Command: fmt.Sprintf("chmod 0777 %s", remotePath),
}
if err := comm.Start(cmd); err != nil {
return fmt.Errorf(
Expand All @@ -227,7 +229,7 @@ func (p *ResourceProvisioner) runScripts(
cmd.Wait()

cmd = &helper.RemoteCmd{
Command: conf.ScriptPath,
Command: remotePath,
Stdout: outW,
Stderr: errW,
}
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11 changes: 10 additions & 1 deletion helper/ssh/provisioner.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,8 +5,11 @@ import (
"fmt"
"io/ioutil"
"log"
"math/rand"
"net"
"os"
"strconv"
"strings"
"time"

"github.com/hashicorp/terraform/terraform"
Expand All @@ -25,7 +28,7 @@ const (

// DefaultScriptPath is used as the path to copy the file to
// for remote execution if not provided otherwise.
DefaultScriptPath = "/tmp/script.sh"
DefaultScriptPath = "/tmp/script_%RAND%.sh"
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This is kind of weird but I've decided not to document this since it is a very advanced use case. And it looks like most people don't use this arg anyways. I'd rather not promise any backwards compat on the syntax of this.

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Agreed +1


// DefaultTimeout is used if there is no timeout given
DefaultTimeout = 5 * time.Minute
Expand All @@ -46,6 +49,12 @@ type SSHConfig struct {
TimeoutVal time.Duration `mapstructure:"-"`
}

func (c *SSHConfig) RemotePath() string {
return strings.Replace(
c.ScriptPath, "%RAND%",
strconv.FormatInt(int64(rand.Int31()), 10), -1)
}
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Probably a bit of potential for future confusion that this isn't memoized, but this area of the code is simple enough that I think it's not a big deal.

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Maybe, yeah. I think it'll be okay to get started though.


// VerifySSH is used to verify the ConnInfo is usable by remote-exec
func VerifySSH(s *terraform.InstanceState) error {
connType := s.Ephemeral.ConnInfo["type"]
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30 changes: 30 additions & 0 deletions helper/ssh/provisioner_test.go
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Original file line number Diff line number Diff line change
@@ -1,11 +1,41 @@
package ssh

import (
"regexp"
"testing"

"github.com/hashicorp/terraform/terraform"
)

func TestSSHConfig_RemotePath(t *testing.T) {
cases := []struct {
Input string
Pattern string
}{
{
"/tmp/script.sh",
`^/tmp/script\.sh$`,
},
{
"/tmp/script_%RAND%.sh",
`^/tmp/script_(\d+)\.sh$`,
},
}

for _, tc := range cases {
config := &SSHConfig{ScriptPath: tc.Input}
output := config.RemotePath()

match, err := regexp.Match(tc.Pattern, []byte(output))
if err != nil {
t.Fatalf("bad: %s\n\nerr: %s", tc.Input, err)
}
if !match {
t.Fatalf("bad: %s\n\n%s", tc.Input, output)
}
}
}

func TestResourceProvider_verifySSH(t *testing.T) {
r := &terraform.InstanceState{
Ephemeral: terraform.EphemeralState{
Expand Down