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# Copyright (c) 2012 Michael DeHaan <michael.dehaan@gmail.com>
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
# ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
# CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
import fnmatch
import multiprocessing
import os
import json
import traceback
# non-core
import paramiko
DEFAULT_HOST_LIST = '/etc/ansible/hosts'
DEFAULT_MODULE_PATH = '/usr/share/ansible'
DEFAULT_MODULE_NAME = 'ping'
DEFAULT_PATTERN = '*'
DEFAULT_FORKS = 3
DEFAULT_MODULE_ARGS = ''
DEFAULT_TIMEOUT = 60
DEFAULT_REMOTE_USER = 'root'
def _executor_hook(x):
(runner, host) = x
return runner._executor(host)
class Runner(object):
def __init__(self,
host_list=DEFAULT_HOST_LIST,
module_path=DEFAULT_MODULE_PATH,
module_name=DEFAULT_MODULE_NAME,
module_args=DEFAULT_MODULE_ARGS,
forks=DEFAULT_FORKS,
timeout=DEFAULT_TIMEOUT,
pattern=DEFAULT_PATTERN,
remote_user=DEFAULT_REMOTE_USER,
verbose=False):
'''
Constructor.
'''
self.host_list = self._parse_hosts(host_list)
self.module_path = module_path
self.module_name = module_name
self.forks = forks
self.pattern = pattern
self.module_args = module_args
self.timeout = timeout
self.verbose = verbose
self.remote_user = remote_user
def _parse_hosts(self, host_list):
''' parse the host inventory file if not sent as an array '''
if type(host_list) != list:
host_list = os.path.expanduser(host_list)
return file(host_list).read().split("\n")
return host_list
def _matches(self, host_name):
''' returns if a hostname is matched by the pattern '''
if host_name == '':
return False
if fnmatch.fnmatch(host_name, self.pattern):
return True
return False
def _connect(self, host):
''' obtains a paramiko connection to the host '''
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
try:
ssh.connect(host, username=self.remote_user,
allow_agent=True, look_for_keys=True)
return [ True, ssh ]
except:
return [ False, traceback.format_exc() ]
def _executor(self, host):
''' callback executed in parallel for each host '''
# TODO: try/catch returning none
ok, conn = self._connect(host)
if not ok:
return [ host, False, conn ]
if self.module_name != "copy":
# transfer a module, set it executable, and run it
outpath = self._copy_module(conn)
self._exec_command(conn, "chmod +x %s" % outpath)
cmd = self._command(outpath)
result = self._exec_command(conn, cmd)
conn.close()
return [ host, True, json.loads(result) ]
else:
# SFTP file copy module is not really a module
ftp = conn.open_sftp()
ftp.put(self.module_args[0], self.module_args[1])
ftp.close()
conn.close()
return [ host, True, 1 ]
def _command(self, outpath):
''' form up a command string '''
cmd = "%s %s" % (outpath, " ".join(self.module_args))
return cmd
def _exec_command(self, conn, cmd):
''' execute a command over SSH '''
stdin, stdout, stderr = conn.exec_command(cmd)
results = "\n".join(stdout.readlines())
return results
def _copy_module(self, conn):
''' transfer a module over SFTP '''
in_path = os.path.expanduser(
os.path.join(self.module_path, self.module_name)
)
out_path = os.path.join(
"/var/spool/",
"ansible_%s" % self.module_name
)
sftp = conn.open_sftp()
sftp.put(in_path, out_path)
sftp.close()
return out_path
def run(self):
''' xfer & run module on all matched hosts '''
hosts = [ h for h in self.host_list if self._matches(h) ]
pool = multiprocessing.Pool(self.forks)
hosts = [ (self,x) for x in hosts ]
results = pool.map(_executor_hook, hosts)
results2 = {
"contacted" : {},
"dark" : {}
}
for x in results:
(host, is_ok, result) = x
if not is_ok:
results2["failed"][host] = result
else:
results2["successful"][host] = result
return results2
if __name__ == '__main__':
# test code...
r = Runner(
host_list = DEFAULT_HOST_LIST,
module_name='ping',
module_args='',
pattern='*',
forks=3
)
print r.run()
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