allow ucloud-image-scanner to also be able work without ceph i.e use filesystem
This commit is contained in:
Ahmed Bilal
parent
5d8dfb2055
commit
ca1d3f39de
3 changed files with 113 additions and 52 deletions
1
.gitignore
vendored
1
.gitignore
vendored
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.idea/
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.vscode/
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.env
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venv/
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log.txt
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etcd3_wrapper
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20
config.py
Normal file
20
config.py
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import logging
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from etcd3_wrapper import Etcd3Wrapper
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from decouple import config
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BASE_PATH = config("BASE_DIR", "/var/www")
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WITHOUT_CEPH = config("WITHOUT_CEPH", False, cast=bool)
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ETCD_URL = config("ETCD_URL")
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logging.basicConfig(
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level=logging.DEBUG,
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filename="log.txt",
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filemode="a",
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format="%(asctime)s: %(levelname)s - %(message)s",
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datefmt="%d-%b-%y %H:%M:%S",
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)
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client = Etcd3Wrapper(host=ETCD_URL)
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140
main.py
140
main.py
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import os
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import json
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import subprocess
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import logging
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from decouple import config
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from etcd3_wrapper import Etcd3Wrapper
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from config import logging, client, BASE_PATH, WITHOUT_CEPH
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BASE_PATH = config("BASE_DIR")
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logging.basicConfig(
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level=logging.DEBUG,
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filename="log.txt",
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filemode="a",
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format="%(asctime)s: %(levelname)s - %(message)s",
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datefmt="%d-%b-%y %H:%M:%S",
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)
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# If you are using WITHOUT_CEPH FLAG in .env
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# then please make sure that /var/image directory
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# exists otherwise this script would fail
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if WITHOUT_CEPH and not os.path.isdir("/var/image"):
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exit(1)
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client = Etcd3Wrapper(host=config("ETCD_URL"))
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images = list(client.get_prefix("/v1/image/", value_in_json=True))
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images_to_be_created = list(filter(lambda e: e.value["status"] == "TO_BE_CREATED", images))
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# We want to get images entries that requests images to be created
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images = client.get_prefix("/v1/image/", value_in_json=True)
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images_to_be_created = filter(lambda im: im.value["status"] == "TO_BE_CREATED", images)
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for image in images_to_be_created:
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image_uuid = image.key.split("/")[-1]
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image_full_path = f"{BASE_PATH}/{image.value['owner']}/{image.value['filename']}"
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if os.path.isfile(image_full_path):
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output = subprocess.check_output(["qemu-img", "info", image_full_path]).decode("utf-8")
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if "qcow2" in output:
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logging.info("Converting it to raw")
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subprocess.run(["qemu-img", "convert", "-f", "qcow2",
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"-O", "raw", image_full_path, f"image.raw"])
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if os.path.isfile(f"image.raw"):
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# shutil.move(f"{image_uuid}.raw", f"/var/vm/{image_uuid}.raw")
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_store_name = image.value["store_name"]
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_image_stores = client.get_prefix("/v1/image_store/", value_in_json=True)
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_user_image_store = next(filter(lambda s: s.value["name"] == _store_name, _image_stores))
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if _user_image_store:
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_image_store_pool = _user_image_store.value["attributes"]["pool"]
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rc = subprocess.check_call(["rbd", "import", "image.raw",
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f"{_image_store_pool}/{image_uuid}"])
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if rc == 0:
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_snapshot_creation_command = f"rbd snap create {_image_store_pool}/{image_uuid}@protected"
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subprocess.check_call(_snapshot_creation_command.split(" "))
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try:
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image_uuid = image.key.split('/')[-1]
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image_owner = image.value['owner']
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image_filename = image.value['filename']
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image_store_name = image.value['store_name']
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image_full_path = os.path.join(BASE_PATH, image_owner, image_filename)
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_snapshot_protect_command = f"rbd snap protect {_image_store_pool}/{image_uuid}@protected"
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subprocess.check_call(_snapshot_protect_command.split(" "))
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image_stores = client.get_prefix("/v1/image_store/", value_in_json=True)
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user_image_store = next(filter(lambda s: s.value["name"] == image_store_name, image_stores))
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image.value["status"] = "CREATED"
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client.put(image.key, json.dumps(image.value))
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else:
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logging.info(f"Some error occurred while creating image {image_uuid}")
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else:
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logging.info(f"Image store {_user_image_store} not found")
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else:
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logging.info(f"{image_uuid}.raw not found")
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else:
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logging.info("not qcow2 format")
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image.value["status"] = "INVALID_FORMAT"
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client.put(image.key, json.dumps(image.value))
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image_store_pool = user_image_store.value['attributes']['pool']
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except Exception as e:
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logging.exception(e)
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else:
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logging.info("File does not exists")
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# At least our basic data is available
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qemu_img_info_command = ["qemu-img", "info", image_full_path]
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qemu_img_convert_command = ["qemu-img", "convert", "-f", "qcow2", "-O", "raw", image_full_path, f"image.raw"]
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image_import_command = ["rbd", "import", "image.raw", f"{image_store_pool}/{image_uuid}"]
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snapshot_creation_command = ["rbd", "snap", "create", f"{image_store_pool}/{image_uuid}@protected"]
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snapshot_protect_command = ["rbd", "snap", "protect", f"{image_store_pool}/{image_uuid}@protected"]
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if WITHOUT_CEPH:
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image_import_command = ["mv", "image.raw", os.path.join("/var/image", image_uuid)]
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snapshot_creation_command = ["true"]
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snapshot_protect_command = ["true"]
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# First check whether the image is qcow2
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# This would also check whether the file exists or not
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try:
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qemu_img_info = subprocess.Popen(qemu_img_info_command,
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stdout=subprocess.PIPE,
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stderr=subprocess.DEVNULL)
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except Exception as e:
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# Command itself failed i.e maybe qemu-img not found
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# Maybe Popen crashes some other ways
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logging.exception(e)
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else:
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# At least we run the qemu-img info command
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# It may have not executed successfully. If thats
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# the case, our next command grep would also fail
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try:
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# Fetching the lines containing "file format"
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command = ["grep", "-e", "file format"]
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output = subprocess.check_output(command, stdin=qemu_img_info.stdout)
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except Exception as e:
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logging.exception(e)
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else:
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# grep command runs successfully, it implies
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# the previous command qemu-img would have
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# run successfully
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output = output.decode("utf-8").strip()
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if "qcow2" in output:
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try:
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# Convert .qcow2 to .raw
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subprocess.check_output(qemu_img_convert_command)
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except Exception as e:
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logging.exception(e)
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else:
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# Image successfully converted
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try:
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# Import image either to ceph/filesystem
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subprocess.check_output(image_import_command)
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except Exception as e:
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logging.exception(e)
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else:
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# Image imported successfully
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try:
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subprocess.check_output(snapshot_creation_command)
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subprocess.check_output(snapshot_protect_command)
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except Exception as e:
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logging.exception(e)
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else:
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# Everything is successfully done
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image.value["status"] = "CREATED"
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client.put(image.key, json.dumps(image.value))
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else:
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# The user provided image is not in qcow2 format
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image.value["status"] = "INVALID_FORMAT"
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client.put(image.key, json.dumps(image.value))
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try:
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os.remove("image.raw")
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except OSError:
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except Exception:
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pass
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