310627890c
Added new method generating Dockerfiles from templates as well as the appropriate code to support this in build.py Co-Authored-By: Sam Yaple <sam@yaple.net> Partially-implements: bp dockerfile-template Change-Id: Id14d10d31cb4aac957e04fbc129de4043d98e033
335 lines
12 KiB
Python
Executable File
335 lines
12 KiB
Python
Executable File
#!/usr/bin/env python
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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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# TODO(SamYaple): Allow image pushing
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# TODO(SamYaple): Single image building w/ optional parent building
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# TODO(SamYaple): Build only missing images
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# TODO(SamYaple): Execute the source install script that will pull
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# down and create tarball
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# TODO(SamYaple): Improve logging instead of printing to stdout
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from __future__ import print_function
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import argparse
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import datetime
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import json
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import os
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import Queue
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import shutil
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import sys
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import tempfile
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from threading import Thread
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import time
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import traceback
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import docker
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import jinja2
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class WorkerThread(Thread):
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def __init__(self, queue, nocache, keep):
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self.queue = queue
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self.nocache = nocache
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self.forcerm = not keep
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self.dc = docker.Client(**docker.utils.kwargs_from_env())
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Thread.__init__(self)
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def run(self):
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"""Executes tasks until the queue is empty"""
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while True:
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try:
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data = self.queue.get(block=False)
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self.builder(data)
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self.queue.task_done()
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except Queue.Empty:
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break
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except Exception:
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traceback.print_exc()
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self.queue.task_done()
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def builder(self, image):
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print('Processing:', image['name'])
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image['status'] = "building"
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if (image['parent'] is not None and
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image['parent']['status'] == "error"):
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image['status'] = "parent_error"
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return
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# Pull the latest image for the base distro only
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pull = True if image['parent'] is None else False
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image['logs'] = str()
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for response in self.dc.build(path=image['path'],
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tag=image['fullname'],
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nocache=self.nocache,
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rm=True,
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pull=pull,
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forcerm=self.forcerm):
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stream = json.loads(response)
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if 'stream' in stream:
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image['logs'] = image['logs'] + stream['stream']
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elif 'errorDetail' in stream:
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image['status'] = "error"
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raise Exception(stream['errorDetail']['message'])
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image['status'] = "built"
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print(image['logs'], 'Processed:', image['name'])
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def argParser():
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parser = argparse.ArgumentParser(description='Kolla build script')
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parser.add_argument('-n', '--namespace',
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help='Set the Docker namespace name',
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type=str,
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default='kollaglue')
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parser.add_argument('--tag',
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help='Set the Docker tag',
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type=str,
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default='latest')
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parser.add_argument('-b', '--base',
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help='The base distro to use when building',
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type=str,
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default='centos')
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parser.add_argument('--base-tag',
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help='The base distro image tag',
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type=str,
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default='latest')
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parser.add_argument('-t', '--type',
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help='The method of the Openstack install',
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type=str,
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default='binary')
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parser.add_argument('--no-cache',
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help='Do not use the Docker cache when building',
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action='store_true',
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default=False)
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parser.add_argument('--keep',
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help='Keep failed intermediate containers',
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action='store_true',
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default=False)
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parser.add_argument('--push',
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help='Push images after building',
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action='store_true',
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default=False)
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parser.add_argument('-T', '--threads',
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help='The number of threads to use while building',
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type=int,
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default=8)
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parser.add_argument('--template',
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help='Create dockerfiles from templates',
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action='store_true',
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default=False)
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return vars(parser.parse_args())
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class KollaWorker(object):
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def __init__(self, args):
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self.kolla_dir = os.path.join(sys.path[0], '..')
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self.images_dir = os.path.join(self.kolla_dir, 'docker')
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self.templates_dir = os.path.join(self.kolla_dir, 'docker_templates')
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self.namespace = args['namespace']
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self.template = args['template']
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self.base = args['base']
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self.base_tag = args['base_tag']
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self.type_ = args['type']
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self.tag = args['tag']
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self.prefix = self.base + '-' + self.type_ + '-'
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def setupWorkingDir(self):
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"""Creates a working directory for use while building"""
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ts = time.time()
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ts = datetime.datetime.fromtimestamp(ts).strftime('%Y-%m-%d_%H-%M-%S_')
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self.temp_dir = tempfile.mkdtemp(prefix='kolla-' + ts)
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self.working_dir = os.path.join(self.temp_dir, 'docker')
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if self.template:
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shutil.copytree(self.templates_dir, self.working_dir)
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else:
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shutil.copytree(self.images_dir, self.working_dir)
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def createDockerfiles(self):
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for path in self.docker_build_paths:
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template_name = "Dockerfile.j2"
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env = jinja2.Environment(loader=jinja2.FileSystemLoader(path))
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template = env.get_template(template_name)
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values = {'base_distro': self.base,
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'base_distro_tag': self.base_tag,
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'install_type': self.type_}
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content = template.render(values)
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with open(os.path.join(path, 'Dockerfile'), 'w') as f:
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f.write(content)
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def findDockerfiles(self):
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"""Recursive search for Dockerfiles in the working directory"""
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self.docker_build_paths = list()
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if self.template:
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path = self.working_dir
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filename = 'Dockerfile.j2'
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else:
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path = os.path.join(self.working_dir, self.base, self.type_)
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filename = 'Dockerfile'
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for root, dirs, names in os.walk(path):
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if filename in names:
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self.docker_build_paths.append(root)
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def cleanup(self):
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"""Remove temp files"""
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shutil.rmtree(self.temp_dir)
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def sortImages(self):
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"""Build images dependency tiers"""
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images_to_process = list(self.images)
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self.tiers = list()
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while images_to_process:
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self.tiers.append(list())
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processed_images = list()
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for image in images_to_process:
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if image['parent'] is None:
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self.tiers[-1].append(image)
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processed_images.append(image)
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if len(self.tiers) > 1:
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for parent in self.tiers[-2]:
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if image['parent'] == parent['fullname']:
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image['parent'] = parent
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self.tiers[-1].append(image)
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processed_images.append(image)
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# TODO(SamYaple): Improve error handling in this section
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if not processed_images:
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print('Could not find parent image from some images. Aborting',
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file=sys.stderr)
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for image in images_to_process:
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print(image['name'], image['parent'], file=sys.stderr)
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sys.exit()
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# You cannot modify a list while using the list in a for loop as it
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# will produce unexpected results by messing up the index so we
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# build a seperate list and remove them here instead
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for image in processed_images:
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images_to_process.remove(image)
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def summary(self):
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"""Walk the list of images and check for errors"""
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print("Successfully built images")
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print("=========================")
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for image in self.images:
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if image['status'] == "built":
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print(image['name'])
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print("\nImages that failed to build")
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print("===========================")
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for image in self.images:
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if image['status'] != "built":
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print(image['name'], "\r\t\t\t Failed with status:",
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image['status'])
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def buildImageList(self):
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self.images = list()
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# Walk all of the Dockerfiles and replace the %%KOLLA%% variables
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for path in self.docker_build_paths:
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with open(os.path.join(path, 'Dockerfile')) as f:
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content = f.read().replace('%%KOLLA_NAMESPACE%%',
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self.namespace)
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content = content.replace('%%KOLLA_PREFIX%%', self.prefix)
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content = content.replace('%%KOLLA_TAG%%', self.tag)
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with open(os.path.join(path, 'Dockerfile'), 'w') as f:
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f.write(content)
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image = dict()
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image['status'] = "unprocessed"
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image['name'] = os.path.basename(path)
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image['fullname'] = self.namespace + '/' + self.prefix + \
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image['name'] + ':' + self.tag
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image['path'] = path
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image['parent'] = content.split(' ')[1].split('\n')[0]
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if self.namespace not in image['parent']:
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image['parent'] = None
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self.images.append(image)
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def buildQueues(self):
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"""Organizes Queue list
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Return a list of Queues that have been organized into a hierarchy
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based on dependencies
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"""
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self.buildImageList()
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self.sortImages()
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pools = list()
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for tier in self.tiers:
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pool = Queue.Queue()
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for image in tier:
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pool.put(image)
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pools.append(pool)
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return pools
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def push_image(image):
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dc = docker.Client(**docker.utils.kwargs_from_env())
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image['push_logs'] = str()
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for response in dc.push(image['fullname'],
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stream=True,
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insecure_registry=True):
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stream = json.loads(response)
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if 'stream' in stream:
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image['push_logs'] = image['logs'] + stream['stream']
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# This is only single threaded for right now so we can show logs
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print(stream['stream'])
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elif 'errorDetail' in stream:
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image['status'] = "error"
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raise Exception(stream['errorDetail']['message'])
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def main():
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args = argParser()
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kolla = KollaWorker(args)
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kolla.setupWorkingDir()
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kolla.findDockerfiles()
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if args['template']:
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kolla.createDockerfiles()
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pools = kolla.buildQueues()
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# Returns a list of Queues for us to loop through
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for pool in pools:
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for x in xrange(args['threads']):
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WorkerThread(pool, args['no_cache'], args['keep']).start()
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# block until queue is empty
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pool.join()
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if args['push']:
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for tier in kolla.tiers:
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for image in tier:
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if image['status'] == "built":
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push_image(image)
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kolla.summary()
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kolla.cleanup()
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if __name__ == '__main__':
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main()
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