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enable discards only on qemu >= 2 

older qemu versions does not have discard option, so not enable it

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>
This commit is contained in:
Vasiliy Tolstov 2015-09-08 10:40:23 +00:00
parent 17cea4fa95
commit 3fae902bc3
2 changed files with 15 additions and 4 deletions
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7
builder/qemu/driver.go
View File

@ -4,7 +4,6 @@ import (
"bufio"
"bytes"
"fmt"
"github.com/mitchellh/multistep"
"io"
"log"
"os/exec"
@ -14,6 +13,8 @@ import (
"syscall"
"time"
"unicode"
"github.com/mitchellh/multistep"
)
type DriverCancelCallback func(state multistep.StateBag) bool
@ -188,8 +189,8 @@ func (d *QemuDriver) Version() (string, error) {
versionOutput := strings.TrimSpace(stdout.String())
log.Printf("Qemu --version output: %s", versionOutput)
versionRe := regexp.MustCompile("qemu-kvm-[0-9]\\.[0-9]")
matches := versionRe.Split(versionOutput, 2)
versionRe := regexp.MustCompile("[0-9]\\.[0-9]\\.[0-9]")
matches := versionRe.FindStringSubmatch(versionOutput)
if len(matches) == 0 {
return "", fmt.Errorf("No version found: %s", versionOutput)
}

10
builder/qemu/step_run.go
View File

@ -4,6 +4,7 @@ import (
"fmt"
"log"
"path/filepath"
"strconv"
"strings"
"github.com/mitchellh/multistep"
@ -62,6 +63,7 @@ func getCommandArgs(bootDrive string, state multistep.StateBag) ([]string, error
vncPort := state.Get("vnc_port").(uint)
sshHostPort := state.Get("sshHostPort").(uint)
ui := state.Get("ui").(packer.Ui)
driver := state.Get("driver").(Driver)
vnc := fmt.Sprintf("0.0.0.0:%d", vncPort-5900)
vmName := config.VMName
@ -82,7 +84,15 @@ func getCommandArgs(bootDrive string, state multistep.StateBag) ([]string, error
defaultArgs["-netdev"] = fmt.Sprintf(
"user,id=user.0,hostfwd=tcp::%v-:%d", sshHostPort, config.Comm.Port())
defaultArgs["-device"] = fmt.Sprintf("%s,netdev=user.0", config.NetDevice)
qemuVersion, err := driver.Version()
if err == nil {
parts := strings.Split(qemuVersion, ".")
if strconv.Atoi(parts[0]) >= 2 {
defaultArgs["-drive"] = fmt.Sprintf("file=%s,if=%s,cache=%s,discard=%s", imgPath, config.DiskInterface, config.DiskCache, config.DiskDiscard)
}
} else {
defaultArgs["-drive"] = fmt.Sprintf("file=%s,if=%s,cache=%s", imgPath, config.DiskInterface, config.DiskCache)
}
if !config.DiskImage {
defaultArgs["-cdrom"] = isoPath
}