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import contextlib
import logging
from io import StringIO
from teuthology import misc as teuthology
from teuthology import contextutil
from teuthology.orchestra import run
log = logging.getLogger(__name__)
@contextlib.contextmanager
def task(ctx, config):
log.info('Setting up nvme_loop on scratch devices...')
host = 'hostnqn'
port = '1'
devs_by_remote = {}
old_scratch_by_remote = {}
for remote, roles in ctx.cluster.remotes.items():
devs = teuthology.get_scratch_devices(remote)
devs_by_remote[remote] = devs
base = '/sys/kernel/config/nvmet'
remote.run(
args=[
'sudo', 'modprobe', 'nvme_loop',
run.Raw('&&'),
'sudo', 'mkdir', '-p', f'{base}/hosts/{host}',
run.Raw('&&'),
'sudo', 'mkdir', '-p', f'{base}/ports/{port}',
run.Raw('&&'),
'echo', 'loop', run.Raw('|'),
'sudo', 'tee', f'{base}/ports/{port}/addr_trtype',
]
)
for dev in devs:
short = dev.split('/')[-1]
log.info(f'Connecting nvme_loop {remote.shortname}:{dev}...')
remote.run(
args=[
'sudo', 'mkdir', '-p', f'{base}/subsystems/{short}',
run.Raw('&&'),
'echo', '1', run.Raw('|'),
'sudo', 'tee', f'{base}/subsystems/{short}/attr_allow_any_host',
run.Raw('&&'),
'sudo', 'mkdir', '-p', f'{base}/subsystems/{short}/namespaces/1',
run.Raw('&&'),
'echo', '-n', dev, run.Raw('|'),
'sudo', 'tee', f'{base}/subsystems/{short}/namespaces/1/device_path',
run.Raw('&&'),
'echo', '1', run.Raw('|'),
'sudo', 'tee', f'{base}/subsystems/{short}/namespaces/1/enable',
run.Raw('&&'),
'sudo', 'ln', '-s', f'{base}/subsystems/{short}',
f'{base}/ports/{port}/subsystems/{short}',
run.Raw('&&'),
'sudo', 'nvme', 'connect', '-t', 'loop', '-n', short, '-q', host,
]
)
# identify nvme_loops devices
old_scratch_by_remote[remote] = remote.read_file('/scratch_devs')
with contextutil.safe_while(sleep=1, tries=15) as proceed:
while proceed():
p = remote.run(args=['sudo', 'nvme', 'list'], stdout=StringIO())
new_devs = []
for line in p.stdout.getvalue().splitlines():
dev, _, vendor = line.split()[0:3]
if dev.startswith('/dev/') and vendor == 'Linux':
new_devs.append(dev)
log.info(f'new_devs {new_devs}')
assert len(new_devs) <= len(devs)
if len(new_devs) == len(devs):
break
remote.write_file(
path='/scratch_devs',
data='\n'.join(new_devs) + '\n',
sudo=True
)
try:
yield
finally:
for remote, devs in devs_by_remote.items():
for dev in devs:
short = dev.split('/')[-1]
log.info(f'Disconnecting nvme_loop {remote.shortname}:{dev}...')
remote.run(
args=[
'sudo', 'nvme', 'disconnect', '-n', short
],
check_status=False,
)
remote.write_file(
path='/scratch_devs',
data=old_scratch_by_remote[remote],
sudo=True
)
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