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https://github.com/ceph/ceph
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56 lines
2.4 KiB
Python
56 lines
2.4 KiB
Python
import contextlib
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import logging
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from teuthology import misc as teuthology
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from teuthology import contextutil
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from ..orchestra import run
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log = logging.getLogger(__name__)
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@contextlib.contextmanager
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def sequential_test(ctx, config):
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"""Example contextmanager that executes a command on remote hosts sequentially."""
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for role in config:
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"""Create a cluster composed of all hosts with the given role, and run the command on them sequentially."""
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log.info('Executing command on all hosts sequentially with role "%s"' % role)
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ctx.cluster.only(role).run(args=['sleep', '5', run.Raw(';'), 'date', run.Raw(';'), 'hostname'])
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yield
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@contextlib.contextmanager
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def parallel_test(ctx, config):
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"""Example contextmanager that executes a command on remote hosts in parallel."""
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for role in config:
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"""Create a cluster composed of all hosts with the given role, and run the command on them concurrently."""
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log.info('Executing command on all hosts concurrently with role "%s"' % role)
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cluster = ctx.cluster.only(role)
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nodes = {}
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for remote in cluster.remotes.iterkeys():
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"""Call run for each remote host, but use 'wait=False' to have it return immediately."""
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proc = remote.run(args=['sleep', '5', run.Raw(';'), 'date', run.Raw(';'), 'hostname'], wait=False,)
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nodes[remote.name] = proc
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for name, proc in nodes.iteritems():
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"""Wait for each process to finish before yielding and allowing other contextmanagers to run."""
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proc.exitstatus.get()
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yield
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@contextlib.contextmanager
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def task(ctx, config):
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"""This is the main body of the task that gets run."""
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"""Take car of some yaml parsing here"""
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if config is not None and not isinstance(config, list) and not isinstance(config, dict):
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assert(False), "task parallel_example only supports a list or dictionary for configuration"
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if config is None:
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config = ['client.{id}'.format(id=id_)
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for id_ in teuthology.all_roles_of_type(ctx.cluster, 'client')]
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if isinstance(config, list):
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config = dict.fromkeys(config)
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clients = config.keys()
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"""Run Multiple contextmanagers sequentially by nesting them."""
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with contextutil.nested(
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lambda: parallel_test(ctx=ctx, config=clients),
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lambda: sequential_test(ctx=ctx, config=clients),
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):
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yield
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