222 lines
6.4 KiB
Python
222 lines
6.4 KiB
Python
import os
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import click
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import functools
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from concurrent.futures import ThreadPoolExecutor, as_completed
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from . import __version__
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from .core import CloudBender
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from .utils import setup_logging
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import logging
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logger = logging.getLogger(__name__)
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@click.group()
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@click.version_option(version=__version__, prog_name="CloudBender")
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@click.option("--debug", is_flag=True, help="Turn on debug logging.")
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@click.option("--dir", "directory", help="Specify cloudbender project directory.")
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@click.pass_context
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def cli(ctx, debug, directory):
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setup_logging(debug)
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# Make sure our root is abs
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if directory:
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if not os.path.isabs(directory):
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directory = os.path.normpath(os.path.join(os.getcwd(), directory))
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else:
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directory = os.getcwd()
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# Read global config
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cb = CloudBender(directory)
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cb.read_config()
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cb.dump_config()
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ctx.obj = cb
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@click.command()
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@click.argument("stack_names", nargs=-1)
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@click.option("--multi", is_flag=True, help="Allow more than one stack to match")
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@click.pass_obj
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def render(cb, stack_names, multi):
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""" Renders template and its parameters """
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stacks = _find_stacks(cb, stack_names, multi)
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_render(stacks)
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@click.command()
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@click.argument("stack_names", nargs=-1)
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@click.option("--multi", is_flag=True, help="Allow more than one stack to match")
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@click.pass_obj
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def sync(cb, stack_names, multi):
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""" Renders template and provisions it right away """
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stacks = _find_stacks(cb, stack_names, multi)
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_render(stacks)
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_provision(cb, stacks)
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@click.command()
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@click.argument("stack_names", nargs=-1)
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@click.option("--multi", is_flag=True, help="Allow more than one stack to match")
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@click.pass_obj
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def validate(cb, stack_names, multi):
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""" Validates already rendered templates using cfn-lint """
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stacks = _find_stacks(cb, stack_names, multi)
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for s in stacks:
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s.validate()
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@click.command()
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@click.argument("stack_name")
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@click.argument("change_set_name")
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@click.pass_obj
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def create_change_set(cb, stack_name, change_set_name):
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""" Creates a change set for an existing stack """
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stacks = _find_stacks(cb, [stack_name])
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for s in stacks:
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s.create_change_set(change_set_name)
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@click.command()
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@click.argument("stack_names", nargs=-1)
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@click.option("--multi", is_flag=True, help="Allow more than one stack to match")
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@click.pass_obj
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def provision(cb, stack_names, multi):
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""" Creates or updates stacks or stack groups """
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stacks = _find_stacks(cb, stack_names, multi)
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_provision(cb, stacks)
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@click.command()
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@click.argument("stack_names", nargs=-1)
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@click.option("--multi", is_flag=True, help="Allow more than one stack to match")
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@click.pass_obj
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def delete(cb, stack_names, multi):
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""" Deletes stacks or stack groups """
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stacks = _find_stacks(cb, stack_names, multi)
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# Reverse steps
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steps = [s for s in sort_stacks(cb, stacks)]
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delete_steps = steps[::-1]
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for step in delete_steps:
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if step:
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with ThreadPoolExecutor(max_workers=len(step)) as group:
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futures = []
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for stack in step:
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if stack.multi_delete:
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futures.append(group.submit(stack.delete))
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for future in as_completed(futures):
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future.result()
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@click.command()
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@click.pass_obj
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def clean(cb):
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""" Deletes all previously rendered files locally """
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cb.clean()
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def sort_stacks(cb, stacks):
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""" Sort stacks by dependencies """
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data = {}
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for s in stacks:
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# To resolve dependencies we have to read each template
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s.read_template_file()
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deps = []
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for d in s.dependencies:
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# For now we assume deps are artifacts so we prepend them with our local profile and region to match stack.id
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for dep_stack in cb.filter_stacks({'region': s.region, 'profile': s.profile, 'provides': d}):
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deps.append(dep_stack.id)
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# also look for global services
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for dep_stack in cb.filter_stacks({'region': 'global', 'profile': s.profile, 'provides': d}):
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deps.append(dep_stack.id)
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data[s.id] = set(deps)
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logger.debug("Stack {} depends on {}".format(s.id, deps))
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# Ignore self dependencies
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for k, v in data.items():
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v.discard(k)
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extra_items_in_deps = functools.reduce(set.union, data.values()) - set(data.keys())
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data.update({item: set() for item in extra_items_in_deps})
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while True:
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ordered = set(item for item, dep in data.items() if not dep)
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if not ordered:
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break
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# return list of stack objects rather than just names
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result = []
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for o in ordered:
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for s in stacks:
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if s.id == o:
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result.append(s)
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yield result
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data = {item: (dep - ordered) for item, dep in data.items()
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if item not in ordered}
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assert not data, "A cyclic dependency exists amongst %r" % data
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def _find_stacks(cb, stack_names, multi=False):
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""" search stacks by name """
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stacks = []
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for s in stack_names:
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stacks = stacks + cb.resolve_stacks(s)
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if not multi and len(stacks) > 1:
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logger.error('Found more than one stack matching name ({}). Please set --multi if that is what you want.'.format(', '.join(stack_names)))
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raise click.Abort()
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if not stacks:
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logger.error('Cannot find stack matching: {}'.format(', '.join(stack_names)))
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raise click.Abort()
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return stacks
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def _render(stacks):
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""" Utility function to reuse code between tasks """
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for s in stacks:
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s.render()
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s.write_template_file()
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def _provision(cb, stacks):
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""" Utility function to reuse code between tasks """
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for step in sort_stacks(cb, stacks):
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if step:
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with ThreadPoolExecutor(max_workers=len(step)) as group:
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futures = []
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for stack in step:
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status = stack.get_status()
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if not status:
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futures.append(group.submit(stack.create))
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else:
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futures.append(group.submit(stack.update))
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for future in as_completed(futures):
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future.result()
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cli.add_command(render)
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cli.add_command(sync)
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cli.add_command(validate)
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cli.add_command(provision)
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cli.add_command(delete)
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cli.add_command(clean)
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cli.add_command(create_change_set)
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if __name__ == '__main__':
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cli(obj={})
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