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qemu: Add a SysProcAttr parameter to CreateCloudInitISO

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This change adds an additional parameter to CreateCloudInitISO that
allows users more control over the newly created xorriso process.
They can for instance specify the user under which the new qemu process
should run and which capabilities should be retained in the child
xorriso process.

Signed-off-by: Mark Ryan <mark.d.ryan@intel.com>
This commit is contained in:
Mark Ryan 2017-10-30 10:06:20 +00:00
parent 11977072ea
commit bc030d13d1
1 changed files with 5 additions and 1 deletions
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6
image.go
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@ -23,6 +23,7 @@ import (
"os"
"os/exec"
"path"
"syscall"
)
// CreateCloudInitISO creates a cloud-init ConfigDrive ISO image. This is
@ -34,8 +35,10 @@ import (
// isoPath contains the desired path of the ISO image to be created. The
// userdata and metadata parameters are byte slices that contain the
// ConfigDrive userdata and metadata that will be stored with the ISO image.
// The attrs parameter can be used to control aspects of the newly created
// qemu process, such as the user and group under which it runs. It may be nil.
func CreateCloudInitISO(ctx context.Context, scratchDir, isoPath string,
userData, metaData []byte) error {
userData, metaData []byte, attr *syscall.SysProcAttr) error {
configDrivePath := path.Join(scratchDir, "clr-cloud-init")
dataDirPath := path.Join(configDrivePath, "openstack", "latest")
metaDataPath := path.Join(dataDirPath, "meta_data.json")
@ -63,6 +66,7 @@ func CreateCloudInitISO(ctx context.Context, scratchDir, isoPath string,
cmd := exec.CommandContext(ctx, "xorriso", "-as", "mkisofs", "-R", "-V", "config-2",
"-o", isoPath, configDrivePath)
cmd.SysProcAttr = attr
err = cmd.Run()
if err != nil {
return fmt.Errorf("Unable to create cloudinit iso image %v", err)