164 lines
5.2 KiB
Python
164 lines
5.2 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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import sys
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import six
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from fuelclient.cli.actions import base
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import fuelclient.cli.arguments as Args
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from fuelclient.cli import error
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from fuelclient.objects import environment
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class GraphAction(base.Action):
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"""Manipulate deployment graph's representation."""
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action_name = 'graph'
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task_types = ('skipped', 'group', 'stage')
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def __init__(self):
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super(GraphAction, self).__init__()
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self.args = (
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Args.get_env_arg(),
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Args.get_render_arg(
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"Render graph from DOT to PNG"
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),
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Args.get_download_arg(
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"Download graph of specific cluster"
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),
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Args.get_dir_arg(
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"Select target dir to render graph."
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),
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Args.group(
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Args.get_skip_tasks(),
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Args.get_tasks()
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),
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Args.get_graph_endpoint(),
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Args.get_graph_startpoint(),
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Args.get_remove_type_arg(self.task_types),
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Args.get_parents_arg(),
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Args.get_tred_arg("Apply transitive reduction filter for graph."),
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)
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self.flag_func_map = (
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('render', self.render),
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('download', self.download),
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)
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@base.check_all("env")
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def download(self, params):
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"""Download deployment graph to stdout
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fuel graph --env 1 --download
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fuel graph --env 1 --download --tasks A B C
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fuel graph --env 1 --download --skip X Y --end pre_deployment
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fuel graph --env 1 --download --skip X Y --start post_deployment
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Specify output:
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fuel graph --env 1 --download > output/dir/file.gv
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Get parents only for task A:
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fuel graph --env 1 --download --parents-for A
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"""
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env = environment.Environment(params.env)
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parents_for = getattr(params, 'parents-for')
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used_params = "# params:\n"
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for param in ('start', 'end', 'skip', 'tasks', 'parents-for',
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'remove'):
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used_params += "# - {0}: {1}\n".format(param,
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getattr(params, param))
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tasks = params.tasks
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if not tasks or (params.skip or params.end or params.start):
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tasks = env.get_tasks(
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skip=params.skip, end=params.end,
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start=params.start, include=params.tasks)
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dotraph = env.get_deployment_tasks_graph(tasks,
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parents_for=parents_for,
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remove=params.remove)
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sys.stdout.write(six.text_type(used_params))
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sys.stdout.write(six.text_type(dotraph))
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@base.check_all("render")
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def render(self, params):
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"""Render graph in PNG format
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fuel graph --render graph.gv
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fuel graph --render graph.gv --dir ./output/dir/
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To apply transitive reduction filter on rendered graph:
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fuel graph --render graph.gv --tred
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fuel graph --render graph.gv --dir ./output/dir/ --tred
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Read graph from stdin
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some_process | fuel graph --render -
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"""
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if params.render == '-':
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dot_data = sys.stdin.read()
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out_filename = 'graph.gv'
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elif not os.path.exists(params.render):
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raise error.ArgumentException(
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"Input file does not exist"
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)
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else:
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out_filename = os.path.basename(params.render)
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with open(params.render, 'r') as f:
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dot_data = f.read()
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target_dir = self.full_path_directory(
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self.default_directory(params.dir),
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''
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)
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target_file = os.path.join(
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target_dir,
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'{0}.png'.format(out_filename),
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)
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if not os.access(os.path.dirname(target_file), os.W_OK):
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raise error.ActionException(
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'Path {0} is not writable'.format(target_file))
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render_graph(dot_data, target_file, params.tred)
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print('Graph saved in "{0}"'.format(target_file))
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def render_graph(input_data, output_path, tred=False):
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"""Renders DOT graph using pygraphviz.
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:param input_data: DOT graph representation
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:param output_path: path to the rendered graph
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:param tred: applies transitive reduction of graph
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"""
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try:
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import pygraphviz
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except ImportError:
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raise error.WrongEnvironmentError(
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"This action requires Graphviz installed "
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"together with 'pygraphviz' Python library")
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graph = pygraphviz.AGraph(string=input_data)
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if tred:
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graph = graph.tred()
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graph.draw(output_path, prog='dot', format='png')
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