Improved performance of SSH with ControlPersist
This commit is contained in:
Marc Aymerich
parent
c6c58d7d97
commit
2877f64d9d
5
TODO.md
5
TODO.md
|
|
@ -343,7 +343,6 @@ TODO mount the filesystem with "nosuid" option
|
|||
# virtdomains file is not ideal, prevent fake/error on domains there! and make sure this file is required!
|
||||
|
||||
# Deprecate restart/start/stop services (do touch wsgi.py and fuck celery)
|
||||
# orchestrate async stdout stderr (inspired on pangea managemengt commands)
|
||||
orchestra-beat support for uwsgi cron
|
||||
|
||||
make django admin taskstate uncollapse fucking traceback, ( if exists ?)
|
||||
|
|
@ -356,5 +355,7 @@ resorce monitoring more efficient, less mem an better queries for calc current d
|
|||
|
||||
# best_price rating method
|
||||
|
||||
# paramiko arcfour cypher
|
||||
|
||||
# error reporting on periodic tasks
|
||||
ciphers=['arcfour128', 'aes256']
|
||||
http://paramiko-docs.readthedocs.org/en/latest/api/transport.html
|
||||
|
|
|
|||
|
|
@ -113,6 +113,6 @@ class Command(BaseCommand):
|
|||
stderr = cstderr
|
||||
if log.has_finished:
|
||||
running.remove(log)
|
||||
time.sleep(0.1)
|
||||
time.sleep(0.05)
|
||||
for log in logs:
|
||||
self.stdout.write(' '.join((log.backend, log.state)))
|
||||
|
|
|
|||
|
|
@ -25,6 +25,7 @@ def keep_log(execute, log, operations):
|
|||
""" send report """
|
||||
# Remember that threads have their oun connection poll
|
||||
# No need to EVER temper with the transaction here
|
||||
log = kwargs['log']
|
||||
try:
|
||||
log = execute(*args, **kwargs)
|
||||
if log.state != log.SUCCESS:
|
||||
|
|
@ -116,11 +117,11 @@ def execute(scripts, serialize=False, async=None):
|
|||
backend, operations = value
|
||||
args = (route.host,)
|
||||
if async is None:
|
||||
async = not serialize and route.async
|
||||
is_async = not serialize and route.async
|
||||
else:
|
||||
async = not serialize and async
|
||||
is_async = not serialize and async
|
||||
kwargs = {
|
||||
'async': async,
|
||||
'async': is_async,
|
||||
}
|
||||
# we clone the connection just in case we are isolated inside a transaction
|
||||
with db.clone(model=BackendLog) as handle:
|
||||
|
|
@ -136,7 +137,7 @@ def execute(scripts, serialize=False, async=None):
|
|||
task = db.close_connection(task)
|
||||
thread = threading.Thread(target=task, args=args, kwargs=kwargs)
|
||||
thread.start()
|
||||
if not async:
|
||||
if not is_async:
|
||||
threads_to_join.append(thread)
|
||||
logs.append(log)
|
||||
[ thread.join() for thread in threads_to_join ]
|
||||
|
|
|
|||
|
|
@ -10,82 +10,52 @@ import paramiko
|
|||
from celery.datastructures import ExceptionInfo
|
||||
from django.conf import settings as djsettings
|
||||
|
||||
from orchestra.utils.python import CaptureStdout
|
||||
from orchestra.utils.sys import sshrun
|
||||
from orchestra.utils.python import CaptureStdout, import_class
|
||||
|
||||
from . import settings
|
||||
|
||||
|
||||
logger = logging.getLogger(__name__)
|
||||
|
||||
transports = {}
|
||||
paramiko_connections = {}
|
||||
|
||||
|
||||
def SSH(backend, log, server, cmds, async=False):
|
||||
def Paramiko(backend, log, server, cmds, async=False):
|
||||
"""
|
||||
Executes cmds to remote server using SSH
|
||||
|
||||
The script is first copied using SCP in order to overflood the channel with large scripts
|
||||
Then the script is executed using the defined backend.script_executable
|
||||
Executes cmds to remote server using Pramaiko
|
||||
"""
|
||||
script = '\n'.join(cmds)
|
||||
script = script.replace('\r', '')
|
||||
bscript = script.encode('utf-8')
|
||||
digest = hashlib.md5(bscript).hexdigest()
|
||||
path = os.path.join(settings.ORCHESTRATION_TEMP_SCRIPT_DIR, digest)
|
||||
remote_path = "%s.remote" % path
|
||||
# Ensure unique local paths for each file because of problems when os.remove(path)
|
||||
path += '@%s' % str(server)
|
||||
log.state = log.STARTED
|
||||
log.script = '# %s\n%s' % (remote_path, script)
|
||||
log.script = script
|
||||
log.save(update_fields=('script', 'state'))
|
||||
if not cmds:
|
||||
return
|
||||
channel = None
|
||||
ssh = None
|
||||
try:
|
||||
# Avoid "Argument list too long" on large scripts by genereting a file
|
||||
# and scping it to the remote server
|
||||
with os.fdopen(os.open(path, os.O_WRONLY | os.O_CREAT, 0o600), 'wb') as handle:
|
||||
handle.write(bscript)
|
||||
|
||||
# ssh connection
|
||||
ssh = paramiko.SSHClient()
|
||||
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
|
||||
addr = server.get_address()
|
||||
key = settings.ORCHESTRATION_SSH_KEY_PATH
|
||||
try:
|
||||
ssh.connect(addr, username='root', key_filename=key, timeout=10)
|
||||
except socket.error as e:
|
||||
logger.error('%s timed out on %s' % (backend, addr))
|
||||
log.state = log.TIMEOUT
|
||||
log.stderr = str(e)
|
||||
log.save(update_fields=['state', 'stderr'])
|
||||
return
|
||||
# ssh connection
|
||||
ssh = paramiko_connections.get(addr)
|
||||
if not ssh:
|
||||
ssh = paramiko.SSHClient()
|
||||
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
|
||||
key = settings.ORCHESTRATION_SSH_KEY_PATH
|
||||
try:
|
||||
ssh.connect(addr, username='root', key_filename=key)
|
||||
except socket.error as e:
|
||||
logger.error('%s timed out on %s' % (backend, addr))
|
||||
log.state = log.TIMEOUT
|
||||
log.stderr = str(e)
|
||||
log.save(update_fields=['state', 'stderr'])
|
||||
return
|
||||
paramiko_connections[addr] = ssh
|
||||
transport = ssh.get_transport()
|
||||
|
||||
# Copy script to remote server
|
||||
sftp = paramiko.SFTPClient.from_transport(transport)
|
||||
sftp.put(path, remote_path)
|
||||
sftp.chmod(remote_path, 0o600)
|
||||
sftp.close()
|
||||
os.remove(path)
|
||||
|
||||
# Execute it
|
||||
context = {
|
||||
'executable': backend.script_executable,
|
||||
'remote_path': remote_path,
|
||||
'digest': digest,
|
||||
'remove': '' if djsettings.DEBUG else "rm -fr %(remote_path)s\n",
|
||||
}
|
||||
cmd = (
|
||||
"[[ $(md5sum %(remote_path)s|awk {'print $1'}) == %(digest)s ]] && %(executable)s %(remote_path)s\n"
|
||||
"RETURN_CODE=$?\n"
|
||||
"%(remove)s"
|
||||
"exit $RETURN_CODE" % context
|
||||
)
|
||||
channel = transport.open_session()
|
||||
channel.exec_command(cmd)
|
||||
|
||||
channel.exec_command(backend.script_executable)
|
||||
channel.sendall(script)
|
||||
channel.shutdown_write()
|
||||
# Log results
|
||||
logger.debug('%s running on %s' % (backend, server))
|
||||
if async:
|
||||
|
|
@ -112,8 +82,8 @@ def SSH(backend, log, server, cmds, async=False):
|
|||
log.stdout += channel.makefile('rb', -1).read().decode('utf-8')
|
||||
log.stderr += channel.makefile_stderr('rb', -1).read().decode('utf-8')
|
||||
|
||||
log.exit_code = exit_code = channel.recv_exit_status()
|
||||
log.state = log.SUCCESS if exit_code == 0 else log.FAILURE
|
||||
log.exit_code = channel.recv_exit_status()
|
||||
log.state = log.SUCCESS if log.exit_code == 0 else log.FAILURE
|
||||
logger.debug('%s execution state on %s is %s' % (backend, server, log.state))
|
||||
log.save()
|
||||
except:
|
||||
|
|
@ -128,8 +98,55 @@ def SSH(backend, log, server, cmds, async=False):
|
|||
log.save(update_fields=['state'])
|
||||
if channel is not None:
|
||||
channel.close()
|
||||
if ssh is not None:
|
||||
ssh.close()
|
||||
|
||||
|
||||
def OpenSSH(backend, log, server, cmds, async=False):
|
||||
"""
|
||||
Executes cmds to remote server using SSH with connection resuse for maximum performance
|
||||
"""
|
||||
script = '\n'.join(cmds)
|
||||
script = script.replace('\r', '')
|
||||
log.state = log.STARTED
|
||||
log.script = script
|
||||
log.save(update_fields=('script', 'state'))
|
||||
if not cmds:
|
||||
return
|
||||
channel = None
|
||||
ssh = None
|
||||
try:
|
||||
ssh = sshrun(server.get_address(), script, executable=backend.script_executable,
|
||||
persist=True, async=async)
|
||||
logger.debug('%s running on %s' % (backend, server))
|
||||
if async:
|
||||
second = False
|
||||
for state in ssh:
|
||||
log.stdout += state.stdout.decode('utf8')
|
||||
log.stderr += state.stderr.decode('utf8')
|
||||
log.save()
|
||||
log.exit_code = state.exit_code
|
||||
else:
|
||||
log.stdout = ssh.stdout
|
||||
log.stderr = ssh.stderr
|
||||
log.exit_code = ssh.exit_code
|
||||
log.state = log.SUCCESS if log.exit_code == 0 else log.FAILURE
|
||||
logger.debug('%s execution state on %s is %s' % (backend, server, log.state))
|
||||
log.save()
|
||||
except:
|
||||
log.state = log.ERROR
|
||||
log.traceback = ExceptionInfo(sys.exc_info()).traceback
|
||||
logger.error('Exception while executing %s on %s' % (backend, server))
|
||||
logger.debug(log.traceback)
|
||||
log.save()
|
||||
finally:
|
||||
if log.state == log.STARTED:
|
||||
log.state = log.ABORTED
|
||||
log.save(update_fields=['state'])
|
||||
|
||||
|
||||
def SSH(*args, **kwargs):
|
||||
""" facade function enabling to chose between multiple SSH backends"""
|
||||
method = import_class(settings.ORCHESTRATION_SSH_METHOD_BACKEND)
|
||||
return method(*args, **kwargs)
|
||||
|
||||
|
||||
def Python(backend, log, server, cmds, async=False):
|
||||
|
|
|
|||
|
|
@ -98,7 +98,6 @@ class BackendLog(models.Model):
|
|||
|
||||
def backend_class(self):
|
||||
return ServiceBackend.get_backend(self.backend)
|
||||
|
||||
|
||||
|
||||
class BackendOperation(models.Model):
|
||||
|
|
|
|||
|
|
@ -1,5 +1,7 @@
|
|||
from os import path
|
||||
|
||||
from django.utils.translation import ugettext_lazy as _
|
||||
|
||||
from orchestra.contrib.settings import Setting
|
||||
|
||||
|
||||
|
|
@ -28,10 +30,6 @@ ORCHESTRATION_ROUTER = Setting('ORCHESTRATION_ROUTER',
|
|||
)
|
||||
|
||||
|
||||
ORCHESTRATION_TEMP_SCRIPT_DIR = Setting('ORCHESTRATION_TEMP_SCRIPT_DIR',
|
||||
'/dev/shm'
|
||||
)
|
||||
|
||||
|
||||
ORCHESTRATION_DISABLE_EXECUTION = Setting('ORCHESTRATION_DISABLE_EXECUTION',
|
||||
False
|
||||
|
|
@ -41,3 +39,13 @@ ORCHESTRATION_DISABLE_EXECUTION = Setting('ORCHESTRATION_DISABLE_EXECUTION',
|
|||
ORCHESTRATION_BACKEND_CLEANUP_DAYS = Setting('ORCHESTRATION_BACKEND_CLEANUP_DAYS',
|
||||
7
|
||||
)
|
||||
|
||||
|
||||
ORCHESTRATION_SSH_METHOD_BACKEND = Setting('ORCHESTRATION_SSH_METHOD_BACKEND',
|
||||
'orchestra.contrib.orchestration.methods.OpenSSH',
|
||||
help_text=_("Two methods provided:<br>"
|
||||
"<tt>orchestra.contrib.orchestration.methods.OpenSSH</tt> with ControlPersist.<br>"
|
||||
"<tt>orchestra.contrib.orchestration.methods.Paramiko</tt> with connection pool.<br>"
|
||||
"Both perform similarly, but OpenSSH has the advantage that the connections are shared between workers,<br>"
|
||||
"Paramiko, in contrast, has a per worker connection pool.")
|
||||
)
|
||||
|
|
|
|||
|
|
@ -69,6 +69,8 @@ class ServiceMonitor(ServiceBackend):
|
|||
except ValueError:
|
||||
cls_name = self.__class__.__name__
|
||||
raise ValueError("%s expected '<id> <value>' got '%s'" % (cls_name, line))
|
||||
if isinstance(value, bytes):
|
||||
value = value.decode('ascii')
|
||||
MonitorData.objects.create(monitor=name, object_id=object_id,
|
||||
content_type=ct, value=value, created_at=self.current_date)
|
||||
|
||||
|
|
|
|||
|
|
@ -102,6 +102,7 @@ def runiterator(command, display=False, stdin=b''):
|
|||
p.stderr.close()
|
||||
raise StopIteration
|
||||
|
||||
|
||||
def join(iterator, display=False, silent=False, valid_codes=(0,)):
|
||||
""" joins the iterator process """
|
||||
stdout = b''
|
||||
|
|
@ -136,13 +137,20 @@ def run(command, display=False, valid_codes=(0,), silent=False, stdin=b'', async
|
|||
next(iterator)
|
||||
if async:
|
||||
return iterator
|
||||
return join(iterator, display=display, silent=silent, valid_codes=valie_codes)
|
||||
return join(iterator, display=display, silent=silent, valid_codes=valid_codes)
|
||||
|
||||
|
||||
def sshrun(addr, command, *args, **kwargs):
|
||||
command = command.replace("'", """'"'"'""")
|
||||
cmd = "ssh -o stricthostkeychecking=no -C root@%s '%s'" % (addr, command)
|
||||
return run(cmd, *args, **kwargs)
|
||||
def sshrun(addr, command, *args, executable='bash', persist=False, **kwargs):
|
||||
options = ['stricthostkeychecking=no']
|
||||
if persist:
|
||||
options.extend((
|
||||
'ControlMaster=auto',
|
||||
'ControlPersist=yes',
|
||||
'ControlPath=~/.ssh/orchestra-%r-%h-%p',
|
||||
))
|
||||
cmd = 'ssh -o {options} -C root@{addr} {executable}'.format(options=' -o '.join(options),
|
||||
addr=addr, executable=executable)
|
||||
return run(cmd, *args, stdin=command.encode('utf8'), **kwargs)
|
||||
|
||||
|
||||
def get_default_celeryd_username():
|
||||
|
|
@ -202,6 +210,6 @@ class LockFile(object):
|
|||
self.release()
|
||||
|
||||
|
||||
def touch_wsgi():
|
||||
def touch_wsgi(delay=5):
|
||||
from . import paths
|
||||
run('{ sleep 2 && touch %s/wsgi.py; } &' % paths.get_project_dir(), async=True)
|
||||
run('{ sleep %i && touch %s/wsgi.py; } &' % (delay, paths.get_project_dir()), async=True)
|
||||
|
|
|
|||
Loading…
Reference in New Issue