390 lines
15 KiB
Python
Executable File
390 lines
15 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright 2018 AT&T Intellectual Property. All other rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# versions.yaml file updater tool
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#
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# Being run in directory with versions.yaml, will create versions.new.yaml,
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# with updated git commit id's to the latest HEAD in references of all
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# charts.
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#
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# In addition to that, the tool updates references to the container images
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# with the tag, equal to the latest image which exists on quay.io
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# repository and is available for download.
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#
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import argparse
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import datetime
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from functools import reduce
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import json
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import logging
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import operator
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import os
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import requests
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import sys
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import time
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try:
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import git
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import yaml
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except ImportError as e:
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sys.exit("Failed to import git/yaml libraries needed to run" +
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"this tool %s" % str(e))
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descr_text = "Being run in directory with versions.yaml, will create \
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versions.new.yaml, with updated git commit id's to the \
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latest HEAD in references of all charts. In addition to \
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that, the tool updates references to the container images \
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with the tag, equal to the latest image which exists on \
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quay.io repository and is available for download."
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parser = argparse.ArgumentParser(description=descr_text)
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# Dictionary containing container image repository url to git url mapping
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#
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# We expect that each image in container image repository has image tag which
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# equals to the git commit id of the HEAD in corresponding git repository.
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#
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# NOTE(roman_g): currently this is not the case, and image is built/tagged not
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# on every merge, and there could be a few hours delay between merge and image
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# re-built and published due to the OpenStack Foundation Zuul infrastructure
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# being overloaded.
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image_repo_git_url = {
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# airflow image is built from airship-shipyard repository
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'quay.io/airshipit/airflow': 'https://opendev.org/airship/shipyard',
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'quay.io/airshipit/armada': 'https://opendev.org/airship/armada',
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'quay.io/airshipit/deckhand': 'https://opendev.org/airship/deckhand',
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# yes, divingbell image is just Ubuntu 16.04 image, and we don't check it's tag
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#'docker.io/ubuntu': 'https://opendev.org/airship/divingbell',
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'quay.io/airshipit/drydock': 'https://opendev.org/airship/drydock',
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# maas-{rack,region}-controller images are built from airship-maas repository
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'quay.io/airshipit/maas-rack-controller': 'https://opendev.org/airship/maas',
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'quay.io/airshipit/maas-region-controller': 'https://opendev.org/airship/maas',
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'quay.io/airshipit/pegleg': 'https://opendev.org/airship/pegleg',
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'quay.io/airshipit/promenade': 'https://opendev.org/airship/promenade',
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'quay.io/airshipit/shipyard': 'https://opendev.org/airship/shipyard',
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# sstream-cache image is built from airship-maas repository
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'quay.io/airshipit/sstream-cache': 'https://opendev.org/airship/maas',
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'quay.io/attcomdev/nagios': 'https://github.com/att-comdev/nagios',
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'quay.io/attcomdev/prometheus-openstack-exporter':
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'https://github.com/att-comdev/prometheus-openstack-exporter'
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}
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logging.basicConfig(level=logging.INFO)
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# Temporary dict of git url's and cached commit id's: {'git_url': 'commit_id'}
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global git_url_commit_ids
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git_url_commit_ids = {}
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# Temporary dict of image repo's and status of image on quay.io
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global image_repo_status
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image_repo_status = {}
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dict_path = None
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def __represent_multiline_yaml_str():
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"""Compel ``yaml`` library to use block style literals for multi-line
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strings to prevent unwanted multiple newlines.
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"""
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yaml.SafeDumper.org_represent_str = yaml.SafeDumper.represent_str
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def repr_str(dumper, data):
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if '\n' in data:
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return dumper.represent_scalar(
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'tag:yaml.org,2002:str', data, style='|')
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return dumper.org_represent_str(data)
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yaml.add_representer(str, repr_str, Dumper=yaml.SafeDumper)
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__represent_multiline_yaml_str()
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def inverse_dict(dic):
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"""Accepts dictionary, returns dictionary where keys become values,
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and values become keys"""
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new_dict = {}
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for k, v in dic.items():
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new_dict[v] = k
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return new_dict
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git_url_image_repo = inverse_dict(image_repo_git_url)
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# https://stackoverflow.com/a/35585837
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def lsremote(url, remote_ref):
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"""Accepts git url and remote reference, returns git commit id."""
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git_commit_id_remote_ref = {}
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g = git.cmd.Git()
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logging.info("Fetching %s %s reference...", url, remote_ref)
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hash_ref_list = g.ls_remote(url, remote_ref).split('\t')
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git_commit_id_remote_ref[hash_ref_list[1]] = hash_ref_list[0]
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return git_commit_id_remote_ref[remote_ref]
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def get_commit_id(url):
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"""Accepts url of git repo and returns corresponding git commit hash"""
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# If we don't have this git url in our url's dictionary,
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# fetch latest commit ID and add new dictionary entry
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logging.debug('git_url_commit_ids: %s', git_url_commit_ids)
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if url not in git_url_commit_ids:
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logging.debug("git url: %s" +
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" is not in git_url_commit_ids dict;" +
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" adding it with HEAD commit id", url)
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git_url_commit_ids[url] = lsremote(url, 'HEAD')
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return git_url_commit_ids[url]
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def get_image_tag(image):
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"""Get latest image tag from quay.io,
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returns 0 (image not hosted on quay.io), True, or False
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"""
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if not image.startswith('quay.io/'):
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logging.info("Unable to verify if image %s" +
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" is in containers repository: only quay.io is" +
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" supported at the moment", image)
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return 0
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# If we don't have this image in our images's dictionary,
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# fetch latest tag and add new dictionary entry
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logging.debug('image_repo_status: %s', image_repo_status)
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if image not in image_repo_status:
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logging.debug("image: %s" +
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" is not in image_repo_status dict;" +
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" adding it with latest tag", image)
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image_repo_status[image] = get_image_latest_tag(image)
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return image_repo_status[image]
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def get_image_latest_tag(image):
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"""Get latest image tag from quay.io,
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returns latest image tag string, or 0 if a problem occured.
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"""
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attempt = 0
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max_attempts = 5
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hash_image = image.split('/')
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url = 'https://quay.io/api/v1/repository/{}/{}/tag/'
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url = url.format(hash_image[1], hash_image[2])
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logging.info("Fetching latest tag for image %s (%s)...", image, url)
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while attempt < max_attempts:
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attempt = attempt + 1
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try:
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res = requests.get(url, timeout=5)
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if res.ok:
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break
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except requests.exceptions.Timeout:
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logging.warning("Failed to fetch url %s for %d attempt(s)", url, attempt)
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time.sleep(1)
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except requests.exceptions.TooManyRedirects:
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logging.error("Failed to fetch url %s, TooManyRedirects", url)
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return 0
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except requests.exceptions.RequestException as e:
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logging.error("Failed to fetch url %s, error: %s", url, e)
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return 0
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if attempt == max_attempts:
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logging.error("Failed to connect to quay.io for %d attempt(s)", attempt)
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return 0
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if res.status_code != 200:
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logging.error("Image %s is not available on quay.io or " +
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"requires authentication", image)
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return 0
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try:
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res = res.json()
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except json.decoder.JSONDecodeError: # pylint: disable=no-member
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logging.error("Unable to parse response from quay.io (%s)", res.url)
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return 0
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try:
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for tag in res['tags']:
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if 'end_ts' not in tag:
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if tag['name'] != 'master' and tag['name'] != 'latest':
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return tag['name']
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except KeyError:
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logging.error("Unable to parse response from quay.io (%s)", res.url)
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return 0
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logging.error("Image with end_ts in path %s not found", image)
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return 0
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# https://stackoverflow.com/a/14692747
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def get_by_path(root, items):
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"""Access a nested object in root by item sequence."""
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return reduce(operator.getitem, items, root)
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def set_by_path(root, items, value):
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"""Set a value in a nested object in root by item sequence."""
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get_by_path(root, items[:-1])[items[-1]] = value
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# Based on http://nvie.com/posts/modifying-deeply-nested-structures/
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def traverse(obj, dict_path=None):
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"""Accepts Python dictionary with values.yaml contents,
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updates it with latest git commit id's.
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"""
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logging.debug('traverse: dict_path: %s, object type: %s, object: %s',
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dict_path, type(obj), obj)
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if dict_path is None:
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dict_path = []
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if isinstance(obj, dict):
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# It's a dictionary element
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logging.debug('this object is a dictionary')
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for k, v in obj.items():
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# If value v we are checking is a dictionary itself, and this
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# dictionary contains key named 'type', and a value of key 'type'
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# equals 'git', then
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if isinstance(v, dict) and 'type' in v and v['type'] == 'git':
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old_git_commit_id = v['reference']
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git_url = v['location']
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if skip_list and k in skip_list:
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logging.info("Ignoring chart %s, it is in a skip list (%s)", k, git_url)
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continue
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new_git_commit_id = get_commit_id(git_url)
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# Update git commit id in reference field of dictionary
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if old_git_commit_id != new_git_commit_id:
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logging.info("Updating git reference for chart %s from %s to %s (%s)",
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k, old_git_commit_id, new_git_commit_id,
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git_url)
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v['reference'] = new_git_commit_id
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else:
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logging.info("Git reference %s for chart %s is already up to date (%s)",
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old_git_commit_id, k, git_url)
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else:
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logging.debug("value %s inside object is not a dictionary, or it does not " +
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"contain key \'type\' with value \'git\', skipping", v)
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# Traverse one level deeper
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traverse(v, dict_path + [k])
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elif isinstance(obj, list):
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# It's a list element
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logging.debug('this object is a list')
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for elem in obj:
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# TODO: Do we have any git references or container image tags in
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# versions.yaml which are inside lists? Probably not.
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traverse(elem, dict_path + [[]])
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else:
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# It's already a value
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logging.debug('this object is a value')
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v = obj
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# Searching for container image repositories, we are only intrested in
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# strings; there could also be booleans or other types we are not interested in.
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if isinstance(v, str):
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for image_repo in image_repo_git_url:
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if image_repo in v:
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logging.debug('image_repo %s is in %s string', image_repo, v)
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# hash_v: {'&whatever repo_url', 'git commit id tag'}
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# Note: 'image' below could contain not just image, but also
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# '&ref host.domain/path/image'
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hash_v = v.split(":")
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image, old_image_tag = hash_v
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if skip_list and image.endswith(skip_list):
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logging.info("Ignoring image %s, it is in a skip list", image)
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continue
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new_image_tag = get_image_tag(image)
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if new_image_tag == 0:
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logging.error("Failed to get image tag for %s", image)
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sys.exit(1)
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# Update git commit id in tag of container image
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if old_image_tag != new_image_tag:
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logging.info("Updating git commit id in " +
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"tag of container image %s from %s to %s",
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image, old_image_tag, new_image_tag)
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set_by_path(versions_data_dict, dict_path, image + ':' + new_image_tag)
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else:
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logging.info("Git tag %s for container " +
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"image %s is already up to date",
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old_image_tag, image)
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else:
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logging.debug('image_repo %s is not in %s string, skipping', image_repo, v)
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else:
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logging.debug('value %s is not string, skipping', v)
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if __name__ == '__main__':
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"""Small Main program
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"""
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parser.add_argument('--in-file', default='versions.yaml',
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help='/path/to/versions.yaml input file; default - "./versions.yaml"')
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parser.add_argument('--out-file', default='versions.yaml',
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help='name of output file; default - "versions.yaml" (overwrite existing)')
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parser.add_argument('--skip',
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help='comma-delimited list of images and charts to skip during the update')
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args = parser.parse_args()
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in_file = args.in_file
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out_file = args.out_file
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if args.skip:
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skip_list = tuple(args.skip.strip().split(","))
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logging.info("Skip list: %s", skip_list)
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else:
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skip_list = None
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if os.path.basename(out_file) != out_file:
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logging.error("Name of the output file must not contain path, " +
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"but only the file name.")
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print("\n")
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parser.print_help()
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sys.exit(1)
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if os.path.isfile(in_file):
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out_file = os.path.join(os.path.dirname(os.path.abspath(in_file)), out_file)
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with open(in_file, 'r') as f:
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f_old = f.read()
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versions_data_dict = yaml.safe_load(f_old)
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else:
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logging.error("Can\'t find versions.yaml file.")
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print("\n")
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parser.print_help()
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sys.exit(1)
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# Traverse loaded yaml and change it
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traverse(versions_data_dict)
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with open(out_file, 'w') as f:
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if os.path.samefile(in_file, out_file):
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logging.info("Overwriting %s", in_file)
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f.write(yaml.safe_dump(versions_data_dict,
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default_flow_style=False,
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explicit_end=True, explicit_start=True,
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width=4096))
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logging.info("New versions.yaml created as %s", out_file)
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