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import json
import logging
import re
from io import StringIO
from textwrap import dedent
from teuthology.orchestra.run import CommandFailedError
from teuthology.orchestra import run
from teuthology.contextutil import MaxWhileTries
from tasks.cephfs.mount import CephFSMount
log = logging.getLogger(__name__)
UMOUNT_TIMEOUT = 300
class KernelMount(CephFSMount):
def __init__(self, ctx, test_dir, client_id, client_remote,
client_keyring_path=None, hostfs_mntpt=None,
cephfs_name=None, cephfs_mntpt=None, brxnet=None, config={}):
super(KernelMount, self).__init__(ctx=ctx, test_dir=test_dir,
client_id=client_id, client_remote=client_remote,
client_keyring_path=client_keyring_path, hostfs_mntpt=hostfs_mntpt,
cephfs_name=cephfs_name, cephfs_mntpt=cephfs_mntpt, brxnet=brxnet)
self.rbytes = config.get('rbytes', False)
self.inst = None
self.addr = None
def mount(self, mntopts=[], createfs=True, check_status=True, **kwargs):
self.update_attrs(**kwargs)
self.assert_and_log_minimum_mount_details()
self.setup_netns()
# TODO: don't call setupfs() from within mount(), since it's
# absurd. The proper order should be: create FS first and then
# call mount().
if createfs:
self.setupfs(name=self.cephfs_name)
if not self.cephfs_mntpt:
self.cephfs_mntpt = '/'
stderr = StringIO()
try:
self.client_remote.run(args=['mkdir', '-p', self.hostfs_mntpt],
timeout=(5*60), stderr=stderr)
except CommandFailedError:
if 'file exists' not in stderr.getvalue().lower():
raise
retval = self._run_mount_cmd(mntopts, check_status)
if retval:
return retval
stderr = StringIO()
try:
self.client_remote.run(
args=['sudo', 'chmod', '1777', self.hostfs_mntpt],
stderr=stderr, timeout=(5*60))
except CommandFailedError:
# the client does not have write permissions in the caps it holds
# for the Ceph FS that was just mounted.
if 'permission denied' in stderr.getvalue().lower():
pass
self.mounted = True
def _run_mount_cmd(self, mntopts, check_status):
opts = 'norequire_active_mds'
if self.client_id:
opts += ',name=' + self.client_id
if self.client_keyring_path and self.client_id:
opts += ',secret=' + self.get_key_from_keyfile()
if self.config_path:
opts += ',conf=' + self.config_path
if self.cephfs_name:
opts += ",mds_namespace=" + self.cephfs_name
if self.rbytes:
opts += ",rbytes"
else:
opts += ",norbytes"
if mntopts:
opts += ',' + ','.join(mntopts)
mount_dev = ':' + self.cephfs_mntpt
prefix = ['sudo', 'adjust-ulimits', 'ceph-coverage',
self.test_dir + '/archive/coverage',
'nsenter',
'--net=/var/run/netns/{0}'.format(self.netns_name)]
cmdargs = prefix + ['/bin/mount', '-t', 'ceph', mount_dev,
self.hostfs_mntpt, '-v', '-o', opts]
mountcmd_stdout, mountcmd_stderr = StringIO(), StringIO()
try:
self.client_remote.run(args=cmdargs, timeout=(30*60),
stdout=mountcmd_stdout,
stderr=mountcmd_stderr)
except CommandFailedError as e:
log.info('mount command failed')
if check_status:
raise
else:
return (e, mountcmd_stdout.getvalue(),
mountcmd_stderr.getvalue())
log.info('mount command passed')
def umount(self, force=False):
if not self.is_mounted():
self.cleanup()
return
log.debug('Unmounting client client.{id}...'.format(id=self.client_id))
try:
cmd=['sudo', 'umount', self.hostfs_mntpt]
if force:
cmd.append('-f')
self.client_remote.run(args=cmd, timeout=(15*60), omit_sudo=False)
except Exception as e:
self.client_remote.run(
args=['sudo', run.Raw('PATH=/usr/sbin:$PATH'), 'lsof',
run.Raw(';'), 'ps', 'auxf'],
timeout=(15*60), omit_sudo=False)
raise e
self.mounted = False
self.cleanup()
def umount_wait(self, force=False, require_clean=False, timeout=900):
"""
Unlike the fuse client, the kernel client's umount is immediate
"""
if not self.is_mounted():
self.cleanup()
return
try:
self.umount(force)
except (CommandFailedError, MaxWhileTries):
if not force:
raise
# force delete the netns and umount
self.client_remote.run(args=['sudo', 'umount', '-f', '-l',
self.mountpoint],
timeout=(15*60), omit_sudo=False)
self.mounted = False
self.cleanup()
def wait_until_mounted(self):
"""
Unlike the fuse client, the kernel client is up and running as soon
as the initial mount() function returns.
"""
assert self.mounted
def teardown(self):
super(KernelMount, self).teardown()
if self.mounted:
self.umount()
def _find_debug_dir(self):
"""
Find the debugfs folder for this mount
"""
pyscript = dedent("""
import glob
import os
import json
def get_id_to_dir():
result = {}
for dir in glob.glob("/sys/kernel/debug/ceph/*"):
mds_sessions_lines = open(os.path.join(dir, "mds_sessions")).readlines()
client_id = mds_sessions_lines[1].split()[1].strip('"')
result[client_id] = dir
return result
print(json.dumps(get_id_to_dir()))
""")
output = self.client_remote.sh([
'sudo', 'python3', '-c', pyscript
], timeout=(5*60))
client_id_to_dir = json.loads(output)
try:
return client_id_to_dir[self.client_id]
except KeyError:
log.error("Client id '{0}' debug dir not found (clients seen were: {1})".format(
self.client_id, ",".join(client_id_to_dir.keys())
))
raise
def read_debug_file(self, filename):
"""
Read the debug file "filename", return None if the file doesn't exist.
"""
debug_dir = self._find_debug_dir()
pyscript = dedent("""
import os
print(open(os.path.join("{debug_dir}", "{filename}")).read())
""").format(debug_dir=debug_dir, filename=filename)
stderr = StringIO()
try:
output = self.client_remote.sh([
'sudo', 'python3', '-c', pyscript
], stderr=stderr, timeout=(5*60))
return output
except CommandFailedError:
if 'no such file or directory' in stderr.getvalue().lower():
return None
raise
def get_global_id(self):
"""
Look up the CephFS client ID for this mount, using debugfs.
"""
assert self.mounted
mds_sessions = self.read_debug_file("mds_sessions")
assert mds_sessions
lines = mds_sessions.split("\n")
return int(lines[0].split()[1])
@property
def _global_addr(self):
if self.addr is not None:
return self.addr
# The first line of the "status" file's output will be something
# like:
# "instance: client.4297 (0)10.72.47.117:0/1148470933"
# What we need here is only the string "10.72.47.117:0/1148470933"
status = self.read_debug_file("status")
if status is None:
return None
instance = re.findall(r'instance:.*', status)[0]
self.addr = instance.split()[2].split(')')[1]
return self.addr;
@property
def _global_inst(self):
if self.inst is not None:
return self.inst
client_gid = "client%d" % self.get_global_id()
self.inst = " ".join([client_gid, self._global_addr])
return self.inst
def get_global_inst(self):
"""
Look up the CephFS client instance for this mount
"""
return self._global_inst
def get_global_addr(self):
"""
Look up the CephFS client addr for this mount
"""
return self._global_addr
def get_osd_epoch(self):
"""
Return 2-tuple of osd_epoch, osd_epoch_barrier
"""
osd_map = self.read_debug_file("osdmap")
assert osd_map
lines = osd_map.split("\n")
first_line_tokens = lines[0].split()
epoch, barrier = int(first_line_tokens[1]), int(first_line_tokens[3])
return epoch, barrier
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