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Laying the groundwork for async mode, async status script still needs to be done, and async_wrapper

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still needs to daemonize.  Then, once done, playbook can be taught how to poll async within the
timing window.
This commit is contained in:
Michael DeHaan 2012-03-03 12:25:56 -05:00
parent 1ed212513c
commit eaa7714ff8
5 changed files with 145 additions and 25 deletions
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69
lib/ansible/runner.py
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@ -30,6 +30,7 @@ import os
import ansible.constants as C
import Queue
import paramiko
import random
################################################
@ -56,6 +57,7 @@ class Runner(object):
pattern=C.DEFAULT_PATTERN,
remote_user=C.DEFAULT_REMOTE_USER,
remote_pass=C.DEFAULT_REMOTE_PASS,
background=0,
verbose=False):
'''
@ -68,6 +70,7 @@ class Runner(object):
forks -------- how parallel should we be? 1 is extra debuggable.
remote_user -- who to login as (default root)
remote_pass -- provide only if you don't want to use keys or ssh-agent
background --- if non 0, run async, failing after X seconds, -1 == infinite
'''
# save input values
@ -82,9 +85,14 @@ class Runner(object):
self.verbose = verbose
self.remote_user = remote_user
self.remote_pass = remote_pass
self.background = background
# hosts in each group name in the inventory file
self._tmp_paths = {}
random.seed()
self.generated_jid = str(random.randint(0, 999999999999))
@classmethod
def parse_hosts(cls, host_list):
'''
@ -162,7 +170,11 @@ class Runner(object):
def _delete_remote_files(self, conn, files):
''' deletes one or more remote files '''
if type(files) == str:
files = [ files ]
for filename in files:
if not filename.startswith('/tmp/'):
raise Exception("not going to happen")
self._exec_command(conn, "rm -rf %s" % filename)
def _transfer_file(self, conn, source, dest):
@ -172,20 +184,21 @@ class Runner(object):
sftp.put(source, dest)
sftp.close()
def _transfer_module(self, conn, tmp):
def _transfer_module(self, conn, tmp, module):
'''
transfers a module file to the remote side to execute it,
but does not execute it yet
'''
outpath = self._copy_module(conn, tmp)
outpath = self._copy_module(conn, tmp, module)
self._exec_command(conn, "chmod +x %s" % outpath)
return outpath
def _execute_module(self, conn, outpath, tmp):
def _execute_module(self, conn, tmp, remote_module_path, module_args):
'''
runs a module that has already been transferred
'''
cmd = self._command(outpath)
args = " ".join(module_args)
cmd = "%s %s" % (remote_module_path, args)
result = self._exec_command(conn, cmd)
self._delete_remote_files(conn, [ tmp ])
return result
@ -195,11 +208,23 @@ class Runner(object):
transfer & execute a module that is not 'copy' or 'template'
because those require extra work.
'''
module = self._transfer_module(conn, tmp)
result = self._execute_module(conn, module, tmp)
module = self._transfer_module(conn, tmp, self.module_name)
result = self._execute_module(conn, tmp, module, self.module_args)
self._delete_remote_files(conn, tmp)
result = self._return_from_module(conn, host, result)
return result
return self._return_from_module(conn, host, result)
def _execute_async_module(self, conn, host, tmp):
'''
transfer the given module name, plus the async module
and then run the async module wrapping the other module
'''
async = self._transfer_module(conn, tmp, 'async_wrapper')
module = self._transfer_module(conn, tmp, self.module_name)
new_args = []
new_args = [ self.generated_jid, module ]
new_args.extend(self.module_args)
result = self._execute_module(conn, tmp, async, new_args)
return self._return_from_module(conn, host, result)
def _parse_kv(self, args):
''' helper function to convert a string of key/value items to a dict '''
@ -225,11 +250,11 @@ class Runner(object):
# install the copy module
self.module_name = 'copy'
module = self._transfer_module(conn)
module = self._transfer_module(conn, tmp, 'copy')
# run the copy module
self.module_args = [ "src=%s" % tmp_src, "dest=%s" % dest ]
result = self._execute_module(conn, module, tmp)
args = [ "src=%s" % tmp_src, "dest=%s" % dest ]
result = self._execute_module(conn, tmp, module, args)
self._delete_remote_files(conn, tmp_path)
return self._return_from_module(conn, host, result)
@ -253,8 +278,8 @@ class Runner(object):
module = self._transfer_module(conn, tmp)
# run the template module
self.module_args = [ "src=%s" % temppath, "dest=%s" % dest, "metadata=%s" % metadata ]
result = self._execute_module(conn, module, tmp)
args = [ "src=%s" % temppath, "dest=%s" % dest, "metadata=%s" % metadata ]
result = self._execute_module(conn, tmp, module, args)
self._delete_remote_files(conn, [ tpath ])
return self._return_from_module(conn, host, result)
@ -278,7 +303,10 @@ class Runner(object):
tmp = self._get_tmp_path(conn)
result = None
if self.module_name not in [ 'copy', 'template' ]:
result = self._execute_normal_module(conn, host, tmp)
if self.background == 0:
result = self._execute_normal_module(conn, host, tmp)
else:
result = self._execute_async_module(conn, host, tmp)
elif self.module_name == 'copy':
result = self._execute_copy(conn, host, tmp)
elif self.module_name == 'template':
@ -291,12 +319,6 @@ class Runner(object):
conn.close()
return result
def _command(self, outpath):
''' form up a command string for running over SSH '''
cmd = "%s %s" % (outpath, " ".join(self.module_args))
return cmd
def remote_log(self, conn, msg):
''' this is the function we use to log things '''
stdin, stdout, stderr = conn.exec_command('/usr/bin/logger -t ansible -p auth.info %r' % msg)
@ -315,12 +337,12 @@ class Runner(object):
result = self._exec_command(conn, "mktemp -d /tmp/ansible.XXXXXX")
return result.split("\n")[0] + '/'
def _copy_module(self, conn, tmp):
def _copy_module(self, conn, tmp, module):
''' transfer a module over SFTP, does not run it '''
in_path = os.path.expanduser(
os.path.join(self.module_path, self.module_name)
os.path.join(self.module_path, module)
)
out_path = tmp + self.module_name
out_path = tmp + module
sftp = conn.open_sftp()
sftp.put(in_path, out_path)
sftp.close()
@ -359,7 +381,6 @@ class Runner(object):
for worker in workers:
worker.join()
except KeyboardInterrupt:
print 'parent received ctrl-c'
for worker in workers:
worker.terminate()
worker.join()