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"""
Run blktrace program through teuthology
"""
import contextlib
import logging
from teuthology import misc as teuthology
from teuthology import contextutil
from teuthology.orchestra import run
log = logging.getLogger(__name__)
blktrace = '/usr/sbin/blktrace'
daemon_signal = 'term'
@contextlib.contextmanager
def setup(ctx, config):
"""
Setup all the remotes
"""
osds = ctx.cluster.only(teuthology.is_type('osd', config['cluster']))
log_dir = '{tdir}/archive/performance/blktrace'.format(tdir=teuthology.get_testdir(ctx))
for remote, roles_for_host in osds.remotes.iteritems():
log.info('Creating %s on %s' % (log_dir, remote.name))
remote.run(
args=['mkdir', '-p', '-m0755', '--', log_dir],
wait=False,
)
yield
@contextlib.contextmanager
def execute(ctx, config):
"""
Run the blktrace program on remote machines.
"""
procs = []
testdir = teuthology.get_testdir(ctx)
log_dir = '{tdir}/archive/performance/blktrace'.format(tdir=testdir)
osds = ctx.cluster.only(teuthology.is_type('osd'))
for remote, roles_for_host in osds.remotes.iteritems():
roles_to_devs = ctx.disk_config.remote_to_roles_to_dev[remote]
for role in teuthology.cluster_roles_of_type(roles_for_host, 'osd',
config['cluster']):
if roles_to_devs.get(role):
dev = roles_to_devs[role]
log.info("running blktrace on %s: %s" % (remote.name, dev))
proc = remote.run(
args=[
'cd',
log_dir,
run.Raw(';'),
'daemon-helper',
daemon_signal,
'sudo',
blktrace,
'-o',
dev.rsplit("/", 1)[1],
'-d',
dev,
],
wait=False,
stdin=run.PIPE,
)
procs.append(proc)
try:
yield
finally:
osds = ctx.cluster.only(teuthology.is_type('osd'))
log.info('stopping blktrace processs')
for proc in procs:
proc.stdin.close()
@contextlib.contextmanager
def task(ctx, config):
"""
Usage:
blktrace:
or:
blktrace:
cluster: backup
Runs blktrace on all osds in the specified cluster (the 'ceph' cluster by
default).
"""
if config is None:
config = {}
config['cluster'] = config.get('cluster', 'ceph')
with contextutil.nested(
lambda: setup(ctx=ctx, config=config),
lambda: execute(ctx=ctx, config=config),
):
yield
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