Re: [libvirt] [sandbox v2 5/5] virt-sandbox-image: add a virt-builder source

Allow virt-sandbox-image to pull templates from virt-builder and run sandboxes on top of them. --- libvirt-sandbox.spec.in | 1 + libvirt-sandbox/image/cli.py | 1 + libvirt-sandbox/image/sources/Makefile.am | 1 + libvirt-sandbox/image/sources/VirtBuilderSource.py | 84 ++++++++++++++++++++++ libvirt-sandbox/image/template.py | 2 + 5 files changed, 89 insertions(+) create mode 100644 libvirt-sandbox/image/sources/VirtBuilderSource.py

+class VirtBuilderSource(Source): + + def _get_template_name(self, template): + # We shouldn't have '/' in the names, but let's make sure + # nobody can try to alter the folders structure later. + return template.path[1:].replace('/', '_') + + def has_template(self, template, templatedir): + imagepath = "%s/%s.qcow2" % (templatedir, template.path) + return os.path.exists(imagepath) + + def create_template(self, template, templatedir, connect=None): + if not os.path.exists(templatedir): + os.makedirs(templatedir) + + # Get the image using virt-builder + templatename = self._get_template_name(template) + imagepath_original = "%s/%s-original.qcow2" % (templatedir, templatename) + imagepath = "%s/%s.qcow2" % (templatedir, templatename) + cmd = ["virt-builder", templatename, + "-o", imagepath_original, "--format", "qcow2"] + subprocess.call(cmd) + + # We need to convert this image into a single partition one. + tarfile = "%s/%s.tar" % (templatedir, templatename) + cmd = ["virt-tar-out", "-a", imagepath_original, "/", tarfile] + subprocess.call(cmd) + + os.unlink(imagepath_original) + + cmd = ["qemu-img", "create", "-q", "-f", "qcow2", imagepath, "10G"] + subprocess.call(cmd) + + self.format_disk(imagepath, "qcow2", connect) + self.extract_tarball(imagepath, "qcow2", tarfile, connect) + os.unlink(tarfile)