/usr/lib/python2.7/dist-packages/asrun/core/server.py is in code-aster-run 1.13.1-2.
This file is owned by root:root, with mode 0o644.
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# ==============================================================================
# COPYRIGHT (C) 1991 - 2010 EDF R&D WWW.CODE-ASTER.ORG
# THIS PROGRAM IS FREE SOFTWARE; YOU CAN REDISTRIBUTE IT AND/OR MODIFY
# IT UNDER THE TERMS OF THE GNU GENERAL PUBLIC LICENSE AS PUBLISHED BY
# THE FREE SOFTWARE FOUNDATION; EITHER VERSION 2 OF THE LICENSE, OR
# (AT YOUR OPTION) ANY LATER VERSION.
#
# THIS PROGRAM IS DISTRIBUTED IN THE HOPE THAT IT WILL BE USEFUL, BUT
# WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF
# MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. SEE THE GNU
# GENERAL PUBLIC LICENSE FOR MORE DETAILS.
#
# YOU SHOULD HAVE RECEIVED A COPY OF THE GNU GENERAL PUBLIC LICENSE
# ALONG WITH THIS PROGRAM; IF NOT, WRITE TO EDF R&D CODE_ASTER,
# 1 AVENUE DU GENERAL DE GAULLE, 92141 CLAMART CEDEX, FRANCE.
# ==============================================================================
"""
This module defines a server used for as_run services.
"""
import os
import os.path as osp
from asrun.core import magic
from asrun.common.i18n import _
from asrun.common.utils import Enum, get_plugin
from asrun.common.sysutils import local_user, local_host, get_home_directory
from asrun.common_func import is_localhost2
# pylint: disable-msg=E1101
TYPES = Enum("COPY_TO", "COPY_FROM", "EXEC")
KEYS = {
TYPES.COPY_TO : 'protocol_copyto',
TYPES.COPY_FROM : 'protocol_copyfrom',
TYPES.EXEC : 'protocol_exec',
}
DEFAULT_ID = "j%d" % os.getpid()
# ----------------------------------------------------------------------
#TODO to import from a *new* system module
def local_shell(command):
"""Execute a command locally."""
magic.log.debug("command: %s", command)
res = magic.run.Shell(command, separated_stderr=True)
magic.log.debug("returns %s", res)
return res
# ----------------------------------------------------------------------
class BaseServer(object):
"""Base class to define a server to execute commands or
to copy files.
A server requires at least two arguments:
host : ip or full name of the host
user : username used to connect
"""
def __init__(self, host, user, **kwargs):
"""Initialization"""
self.host = host or local_host
self.user = user or local_user
self._is_localhost = is_localhost2(self.host, self.user)
magic.log.debug("BaseServer init host=%s user=%s", self.host, self.user)
def is_localhost(self):
"""Tell if the server is the local host."""
return self._is_localhost
class ExecServer(BaseServer):
"""Server with execution capability."""
def __init__(self, host, user, **kwargs):
"""Initialization"""
super(ExecServer, self).__init__(host, user, **kwargs)
self.aster_root = kwargs.get('aster_root')
def set_aster_root(self, aster_root):
"""Configure the server."""
self.aster_root = aster_root
def get_aster_root(self):
return self.aster_root
def support_display_forwarding(self):
"""Tell if the protocol supports display forwarding."""
# If True the display must be reset before calling exec_command,
# the protocol shoud redefined it internally ($DISPLAY is the
# right value). Example: SSH (which uses localhost:11.0).
# If False, the current value can be used but will work only
# if remote display connections are allowed. Example: RSH.
return False
def exec_command(self, command, display_forwarding=False, **opts):
"""Execute a command line on the server."""
cmd = command
if type(cmd) in (list, tuple):
cmd = ' '.join(cmd)
magic.log.info(_(u"execute on %s@%s : %s"), self.user, self.host, cmd)
res = self._exec_command(command, display_forwarding, **opts)
magic.log.info(_(u"returns %s"), res[0])
return res
def _exec_command(self, command, display_forwarding=False, **opts):
"""Execute a command line on the server."""
# the server must deal with display_forwarding option
# and print a warning if it doesn't support it.
raise NotImplementedError('must be defined in a derivated class')
class CopyServer(BaseServer):
"""Server with copy capability.
Requires host, user + proxy_dir : directory used for copying.
jobid allows to identify the "repository" (something as fromhost-pid)
"""
def __init__(self, host, user, **kwargs):
"""Initialization"""
super(CopyServer, self).__init__(host, user, **kwargs)
self.jobid = kwargs.get('jobid', DEFAULT_ID)
self.remote_basedir = kwargs['proxy_dir']
name = '%s-%s-%s' % (self.user, self.host, self.jobid)
name = name.strip('-')
self.proxy_dir = osp.join(self.remote_basedir, name)
def set_proxy_dir(self, proxy_dir):
"""Configure the server."""
if self.is_localhost():
self.proxy_dir = osp.join(get_home_directory(self.user), proxy_dir)
else:
self.proxy_dir = proxy_dir
def get_proxy_dir(self):
return self.proxy_dir
def delete_proxy_dir(self):
"""Erase the proxy_dir directory on the server."""
raise NotImplementedError('must be defined in a derivated class')
class CopyToServer(CopyServer):
"""Server with copy capability.
Requires host, user + proxy_dir : directory in which the files
will be copied.
"""
# files should be on localhost or already on "self"
# If a file is on another server, we try to use this protocol.
def __init__(self, host, user, **kwargs):
"""Initialization"""
super(CopyToServer, self).__init__(host, user, **kwargs)
self._proxydir_created = False
def _create_dir(self, directory):
"""Create a directory on the server."""
raise NotImplementedError('must be defined in a derivated class')
def _create_proxy_dir(self):
"""Create proxy_dir directory on the server."""
if not self._proxydir_created:
self._create_dir(self.proxy_dir)
self._proxydir_created = True
def _copyoneto(self, src, convert=None, **opts):
"""Copy the file `srcto a server.
Return 0 or >0 if it failed.
`convert` is the function used to compute basename = f(convert).
"""
raise NotImplementedError('must be defined in a derivated class')
def copyto(self, *files, **opts):
"""Copy `filesto a server."""
self._create_proxy_dir()
ret = 0
if len(files) == 0:
magic.log.info(_(u"no file to copy."))
for src in files:
iret = self._copyoneto(src, **opts)
ret = max(ret, iret)
return ret
def get_remote_filename(self, src):
"""Return the filename of 'src' after being copied on the server
(using copyto)."""
return osp.join(self.get_proxy_dir(), osp.basename(src))
class CopyFromServer(CopyServer):
"""Server with copy capability.
Requires host, user + proxy_dir : directory from which the files
will be download.
"""
# files are on the server and will be copied on localhost.
# If a file should be copied on another host, it should fail.
def _create_local_destdir(self, dst):
"""Create destination directory of `dst(on localhost)."""
dname = osp.dirname(dst)
magic.log.debug('mkdir %s', dname)
try:
os.makedirs(dname)
except:
# the copy will fail later...
pass
def _copyonefrom(self, dst, convert=None, **opts):
"""Copy the file `dst` from a server.
Return 0 or >0 if it failed.
`convert` is the function used to compute basename = f(convert).
Example : dst=/home/user/dir/fname
=> COPY log@mach:`self.proxy_dir`/convert(fname) /home/user/dir/fname
Warning: to avoid to create /home/user/dir/fname/fname when
fname is a directory, it's usually better to execute:
=> COPY log@mach:`self.proxy_dir`/convert(fname) /home/user/dir/
"""
raise NotImplementedError('must be defined in a derivated class')
def copyfrom(self, *files, **opts):
"""Copy each element of `files` from a server."""
ret = 0
if len(files) == 0:
magic.log.info(_(u"no file to copy."))
for dst in files:
self._create_local_destdir(dst)
iret = self._copyonefrom(dst, **opts)
ret = max(ret, iret)
return ret
class LocalExecServer(ExecServer):
"""To execute command on localhost."""
#TODO AsterSystem need refactoring (as a module) to be called here
# support_display_forwarding is False, the current display value
# will be used.
# For example, --edit receive localhost.domain:0.0, see it's the
# local host, and so finally use :0.0
# I think it can not automatically use :0.0, if astk is run from
# a remote machine. In this case, we must try to use remote.domain:0...
def __init__(self, host, user, **kwargs):
"""Initialization"""
magic.log.debug("LocalExecServer init")
super(LocalExecServer, self).__init__(host, user, **kwargs)
self.user = local_user
self.host = local_host
def _exec_command(self, command, display_forwarding=False, **options):
"""Execute a command line on the server."""
return local_shell(command)
class LocalCopyServer(CopyToServer, CopyFromServer):
"""To execute command on localhost."""
#TODO AsterSystem need refactoring (as a module) to be called here
def __init__(self, host, user, **kwargs):
"""Initialization"""
magic.log.debug("LocalCopyServer init")
super(LocalCopyServer, self).__init__(host, user, **kwargs)
self.user = local_user
self.host = local_host
def _create_dir(self, directory):
"""Create a directory on the server."""
magic.log.info(_(u"create directory %s..."), directory)
try:
os.makedirs(directory)
except:
pass
magic.log.info(_(u"done"))
def delete_proxy_dir(self):
"""Erase the proxy_dir directory on the server."""
import shutil
magic.log.info(_(u"delete directory %s..."), self.proxy_dir)
try:
shutil.rmtree(self.proxy_dir)
except OSError:
magic.log.info(_(u"failed"))
else:
magic.log.info(_(u"done"))
def _copyoneto(self, src, convert=None):
"""Copy the file `srcto a server.
Return 0 or >0 if it failed.
`convert` is the function used to compute basename = f(convert).
"""
magic.log.info(_(u"copy %s to %s"), src, self.proxy_dir)
bname = osp.basename(src)
if convert is not None:
bname = convert(src)
dst = osp.join(self.proxy_dir, bname)
iret = magic.run.Copy(dst, src, niverr='SILENT')
magic.log.info(_(u"returns %s"), iret)
return iret
def _copyonefrom(self, dst, convert=None):
"""Copy the file `dst` from a server.
`convert` is the function used to compute basename = f(convert).
Return 0 or >0 if it failed.
Example : dst=/home/user/dir/fname
=> cp -r `self.proxy_dir`/convert(fname) /home/user/dir/fname
Warning: to avoid to create /home/user/dir/fname/fname when
fname is a directory, we execute:
=> cp -r `self.proxy_dir`/convert(fname) /home/user/dir/
"""
bname = osp.basename(dst)
if convert is not None:
bname = convert(dst)
fsrc = osp.join(self.proxy_dir, bname)
magic.log.info(_(u"copy %s to %s"), fsrc, dst)
iret = magic.run.Copy(dst, fsrc, niverr='SILENT')
magic.log.info(_(u"returns %s"), iret)
return iret
def build_server(classname, host, user, **kwargs):
"""Build a server calling the specified protocol class.
the argument type is necessary to choose a LocalServer variant.
"""
path = classname.split('.')
if is_localhost2(host, user=user) and kwargs.get('type') is not None:
magic.log.debug("'%s' is the local host", host)
if kwargs['type'] in (TYPES.COPY_TO, TYPES.COPY_FROM):
sclass = LocalCopyServer
else:
sclass = LocalExecServer
elif globals().get(path[-1]):
sclass = globals()[path[-1]]
else:
# external server type
sclass = get_plugin(classname)
magic.log.debug("create %s with %s, %s, %s", sclass, host, user, kwargs)
return sclass(host, user, **kwargs)
def build_server_from_profile(prof, type, **kwargs):
"""Build a server object from content of an AsterProfil object.
The export must defined :
- proxy_dir for COPY_TO/COPY_FROM servers
- aster_root for an EXEC server
"""
host = prof['serveur'][0]
user = prof['username'][0]
proto = prof[KEYS[type]][0]
assert proto, u"'%s' not defined in the profile" % KEYS[type]
if type in (TYPES.COPY_TO, TYPES.COPY_FROM):
kwargs['proxy_dir'] = prof['proxy_dir'][0]
assert kwargs['proxy_dir'], u"'proxy_dir' not defined in the profile"
if type == TYPES.EXEC:
kwargs['aster_root'] = prof['aster_root'][0]
assert kwargs['aster_root'], u"'aster_root' not defined in the profile"
if not TYPES.exists(type):
raise TypeError('invalid type: %s' % repr(type))
serv = build_server(proto, host, user, type=type, **kwargs)
return serv
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