class DeleteImage(Delete):
"""
Delete images.
"""
def __init__(self, name, config, runtime_config):
"""
Delete an image.
:param name: image name, not strictly needed.
:type name: str
:param config: configuration of the image
:type config: dict
:param runtime_config: runtime configuration
:type runtime_config: dict
"""
super().__init__(name, config, runtime_config)
self.path = os.path.join(BASE_IMAGE_DIR, self.config["image"]["name"],
self.config["image"]["version"])
self.systemd = SystemdImage(runtime_config)
self.unit_name = "{}.mount".format(self.systemd._escape(self.path))
def _sanity_check(self):
"""
Image deletion sanity check.
"""
containers = []
for container_fname in os.listdir(ETC_CONTAINER_CONF_DIR):
container_config = read_config_file(
os.path.join(ETC_CONTAINER_CONF_DIR, container_fname))
if (container_config["image"]["name"] ==
self.config["image"]["name"] and
container_config["image"]["version"] ==
self.config["image"]["version"]):
containers.append(container_config["container"]["name"])
if containers:
raise DeleteError("Containers require this image: \n\t"
"{}".format("\n\t".join(containers)))
def _clean_sponson_conf(self):
"""
Remove sponson image configuration files.
"""
config_base_path = os.path.join(BASE_CONF_DIR,
self.config["image"]["name"])
config_path = os.path.join(
config_base_path,
"{}.yaml".format(self.config["image"]["version"]))
latest_path = os.path.join(config_base_path, "latest.yaml")
os.remove(config_path)
if os.readlink(latest_path) == config_path:
os.unlink(latest_path)
remaining = sorted(os.listdir(config_base_path))
if remaining:
new_latest = os.path.join(config_base_path, remaining.pop())
os.link(new_latest, latest_path)
def _clean_dir(self):
"""
Image removal specific cleaning function,
to relink the "latest" image version
if the removed directory was the previous "latest" version.
"""
super()._clean_dir()
link_latest_image(os.path.join(BASE_IMAGE_DIR,
self.config["image"]["name"]))
