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As part of a precursor to other refactoring, make returns less list-like throughout runner.

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This commit is contained in:
Michael DeHaan 2012-05-25 18:44:29 -04:00
parent da3816d370
commit 6d580aea02
2 changed files with 150 additions and 125 deletions
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2
lib/ansible/callbacks.py
View file

@ -128,6 +128,8 @@ class CliRunnerCallbacks(DefaultRunnerCallbacks):
self._on_any(host,res)
def on_unreachable(self, host, res):
if type(res) == dict:
res = res.get('msg','')
print "%s | FAILED => %s" % (host, res)
if self.options.tree:
utils.write_tree_file(self.options.tree, host, utils.bigjson(dict(failed=True, msg=res)))

271
lib/ansible/runner.py
View file

@ -68,6 +68,37 @@ def _executor_hook(job_queue, result_queue):
################################################
class ReturnData(object):
__slots__ = [ 'result', 'comm_ok', 'executed_str', 'host' ]
def __init__(self, host=None, result=None, comm_ok=True, executed_str=''):
self.host = host
self.result = result
self.comm_ok = comm_ok
self.executed_str = executed_str
if type(self.result) in [ str, unicode ]:
self.result = utils.parse_json(self.result)
if host is None:
raise Exception("host not set")
if type(self.result) != dict:
raise Exception("dictionary result expected")
def communicated_ok(self):
return self.comm_ok
def is_successful(self):
if not self.comm_ok:
return False
else:
if 'failed' in self.result:
return False
if self.result.get('rc',0) != 0:
return False
return True
class Runner(object):
def __init__(self,
@ -103,7 +134,7 @@ class Runner(object):
conditional : only execute if this string, evaluated, is True
callbacks : output callback class
sudo : log in as remote user and immediately sudo to root
module_vars : provides additional variables to a template. FIXME: just use module_args, remove
module_vars : provides additional variables to a template. FIXME: factor this out
is_playbook : indicates Runner is being used by a playbook. affects behavior in various ways.
inventory : inventory object, if host_list is not provided
"""
@ -162,21 +193,6 @@ class Runner(object):
# *****************************************************
def _return_from_module(self, conn, host, result, err, executed=None):
''' helper function to handle JSON parsing of results '''
try:
result = utils.parse_json(result)
if executed is not None:
result['invocation'] = executed
if 'stderr' in result:
err="%s%s"%(err,result['stderr'])
return [host, True, result, err]
except Exception, e:
return [host, False, "%s/%s/%s" % (str(e), result, executed), err]
# *****************************************************
def _delete_remote_files(self, conn, files):
''' deletes one or more remote files '''
@ -185,7 +201,7 @@ class Runner(object):
for filename in files:
if filename.find('/tmp/') == -1:
raise Exception("not going to happen")
self._exec_command(conn, "rm -rf %s" % filename, None)
self._low_level_exec_command(conn, "rm -rf %s" % filename, None)
# *****************************************************
@ -193,7 +209,7 @@ class Runner(object):
''' transfers a module file to the remote side to execute it, but does not execute it yet '''
outpath = self._copy_module(conn, tmp, module)
self._exec_command(conn, "chmod +x %s" % outpath, tmp)
self._low_level_exec_command(conn, "chmod +x %s" % outpath, tmp)
return outpath
# *****************************************************
@ -263,6 +279,7 @@ class Runner(object):
def _execute_module(self, conn, tmp, remote_module_path, args,
async_jid=None, async_module=None, async_limit=None):
''' runs a module that has already been transferred '''
inject = self.setup_cache.get(conn.host,{}).copy()
@ -272,7 +289,8 @@ class Runner(object):
conditional = utils.double_template(self.conditional, inject, self.setup_cache)
if not eval(conditional):
return [ utils.smjson(dict(skipped=True)), None, 'skipped' ]
result = utils.smjson(dict(skipped=True))
return ReturnData(host=conn.host, result=result)
if self.module_name == 'setup':
if not args:
@ -292,9 +310,12 @@ class Runner(object):
else:
cmd = " ".join([str(x) for x in [remote_module_path, async_jid, async_limit, async_module, argsfile]])
res, err = self._exec_command(conn, cmd, tmp, sudoable=True)
client_executed_str = "%s %s" % (module_name_tail, args.strip())
return ( res, err, client_executed_str )
res = self._low_level_exec_command(conn, cmd, tmp, sudoable=True)
result1 = utils.parse_json(res)
executed_str = "%s %s" % (module_name_tail, args.strip())
return ReturnData(host=conn.host, result=res, executed_str=executed_str)
# *****************************************************
@ -336,18 +357,15 @@ class Runner(object):
# *****************************************************
def _execute_raw(self, conn, host, tmp):
def _execute_raw(self, conn, tmp):
''' execute a non-module command for bootstrapping, or if there's no python on a device '''
stdout, stderr = self._exec_command( conn, self.module_args, tmp, sudoable = True )
stdout = self._low_level_exec_command( conn, self.module_args, tmp, sudoable = True )
data = dict(stdout=stdout)
if stderr:
data['stderr'] = stderr
return (host, True, data, '')
return ReturnData(host=conn.host, results=data)
# ***************************************************
def _execute_normal_module(self, conn, host, tmp, module_name):
def _execute_normal_module(self, conn, tmp, module_name):
''' transfer & execute a module that is not 'copy' or 'template' '''
# shell and command are the same module
@ -356,22 +374,17 @@ class Runner(object):
self.module_args += " #USE_SHELL"
module = self._transfer_module(conn, tmp, module_name)
(result, err, executed) = self._execute_module(conn, tmp, module, self.module_args)
(host, ok, data, err) = self._return_from_module(conn, host, result, err, executed)
if ok:
self._add_result_to_setup_cache(conn, data)
return (host, ok, data, err)
exec_rc = self._execute_module(conn, tmp, module, self.module_args)
if exec_rc.is_successful():
self._add_result_to_setup_cache(conn, exec_rc.result)
return exec_rc
# *****************************************************
def _execute_async_module(self, conn, host, tmp, module_name):
def _execute_async_module(self, conn, tmp, module_name):
''' transfer the given module name, plus the async module, then run it '''
# hack to make the 'shell' module keyword really be executed
# by the command module
# shell and command module are the same
module_args = self.module_args
if module_name == 'shell':
module_name = 'command'
@ -379,17 +392,16 @@ class Runner(object):
async = self._transfer_module(conn, tmp, 'async_wrapper')
module = self._transfer_module(conn, tmp, module_name)
(result, err, executed) = self._execute_module(conn, tmp, async, module_args,
return self._execute_module(conn, tmp, async, module_args,
async_module=module,
async_jid=self.generated_jid,
async_limit=self.background
)
return self._return_from_module(conn, host, result, err, executed)
# *****************************************************
def _execute_copy(self, conn, host, tmp):
def _execute_copy(self, conn, tmp):
''' handler for file transfer operations '''
# load up options
@ -397,12 +409,12 @@ class Runner(object):
source = options.get('src', None)
dest = options.get('dest', None)
if (source is None and not 'first_available_file' in self.module_vars) or dest is None:
return (host, True, dict(failed=True, msg="src and dest are required"), '')
result=dict(failed=True, msg="src and dest are required")
return ReturnData(host=conn.host, result=result)
# apply templating to source argument
inject = self.setup_cache.get(conn.host,{})
# FIXME: break duplicate code up into subfunction
# if we have first_available_file in our vars
# look up the files and use the first one we find as src
if 'first_available_file' in self.module_vars:
@ -414,7 +426,8 @@ class Runner(object):
found = True
break
if not found:
return (host, True, dict(failed=True, msg="could not find src in first_available_file list"), '')
results=dict(failed=True, msg="could not find src in first_available_file list")
return ReturnData(host=conn.host, is_error=True, results=results)
source = utils.template(source, inject, self.setup_cache)
@ -428,17 +441,16 @@ class Runner(object):
# run the copy module
args = "src=%s dest=%s" % (tmp_src, dest)
(result1, err, executed) = self._execute_module(conn, tmp, module, args)
(host, ok, data, err) = self._return_from_module(conn, host, result1, err, executed)
exec_rc = self._execute_module(conn, tmp, module, args)
if ok:
return self._chain_file_module(conn, tmp, data, err, options, executed)
if exec_rc.is_successful():
return self._chain_file_module(conn, tmp, exec_rc, options)
else:
return (host, ok, data, err)
return exec_rc
# *****************************************************
def _execute_fetch(self, conn, host, tmp):
def _execute_fetch(self, conn, tmp):
''' handler for fetch operations '''
# load up options
@ -446,7 +458,8 @@ class Runner(object):
source = options.get('src', None)
dest = options.get('dest', None)
if source is None or dest is None:
return (host, True, dict(failed=True, msg="src and dest are required"), '')
results = dict(failed=True, msg="src and dest are required")
return ReturnData(host=conn.host, error=True, results=results)
# apply templating to source argument
inject = self.setup_cache.get(conn.host,{})
@ -456,14 +469,14 @@ class Runner(object):
dest = utils.template(dest, inject, self.setup_cache)
# files are saved in dest dir, with a subdir for each host, then the filename
dest = "%s/%s/%s" % (utils.path_dwim(self.basedir, dest), host, source)
dest = "%s/%s/%s" % (utils.path_dwim(self.basedir, dest), conn.host, source)
dest = dest.replace("//","/")
# compare old and new md5 for support of change hooks
local_md5 = None
if os.path.exists(dest):
local_md5 = os.popen("md5sum %s" % dest).read().split()[0]
remote_md5 = self._exec_command(conn, "md5sum %s" % source, tmp, True)[0].split()[0]
remote_md5 = self._low_level_exec_command(conn, "md5sum %s" % source, tmp, True)[0].split()[0]
if remote_md5 != local_md5:
# create the containing directories, if needed
@ -473,35 +486,39 @@ class Runner(object):
conn.fetch_file(source, dest)
new_md5 = os.popen("md5sum %s" % dest).read().split()[0]
if new_md5 != remote_md5:
return (host, True, dict(failed=True, msg="md5 mismatch", md5sum=new_md5), '')
return (host, True, dict(changed=True, md5sum=new_md5), '')
result = dict(failed=True, msg="md5 mismatch", md5sum=new_md5)
return ReturnData(host=conn.host, result=result)
result = dict(changed=True, md5sum=new_md5)
return ReturnData(host=conn.host, result=result)
else:
return (host, True, dict(changed=False, md5sum=local_md5), '')
result = dict(changed=False, md5sum=local_md5)
return ReturnData(host=conn.host, result=result)
# *****************************************************
def _chain_file_module(self, conn, tmp, data, err, options, executed):
def _chain_file_module(self, conn, tmp, exec_rc, options):
''' handles changing file attribs after copy/template operations '''
old_changed = data.get('changed', False)
old_changed = exec_rc.result.get('changed', False)
module = self._transfer_module(conn, tmp, 'file')
args = ' '.join([ "%s=%s" % (k,v) for (k,v) in options.items() ])
(result2, err2, executed2) = self._execute_module(conn, tmp, module, args)
results2 = self._return_from_module(conn, conn.host, result2, err2, executed)
(host, ok, data2, err2) = results2
if ok:
new_changed = data2.get('changed', False)
data.update(data2)
else:
exec_rc2 = self._execute_module(conn, tmp, module, args)
new_changed = False
if exec_rc2.is_successful():
new_changed = exec_rc2.result.get('changed', False)
exec_rc.result.update(exec_rc2.result)
if old_changed or new_changed:
data['changed'] = True
return (host, ok, data, "%s%s"%(err,err2))
exec_rc.result['changed'] = True
return exec_rc
# *****************************************************
def _execute_template(self, conn, host, tmp):
def _execute_template(self, conn, tmp):
''' handler for template operations '''
# load up options
@ -510,7 +527,8 @@ class Runner(object):
dest = options.get('dest', None)
metadata = options.get('metadata', None)
if (source is None and 'first_available_file' not in self.module_vars) or dest is None:
return (host, True, dict(failed=True, msg="src and dest are required"), '')
result = dict(failed=True, msg="src and dest are required")
return ReturnData(host=conn.host, comm_ok=False, result=result)
# apply templating to source argument so vars can be used in the path
inject = self.setup_cache.get(conn.host,{})
@ -526,11 +544,13 @@ class Runner(object):
found = True
break
if not found:
return (host, True, dict(failed=True, msg="could not find src in first_available_file list"), '')
result = dict(failed=True, msg="could not find src in first_available_file list")
return ReturnData(host=conn.host, comm_ok=False, result=result)
source = utils.template(source, inject, self.setup_cache)
(host, ok, data, err) = (None, None, None, None)
#(host, ok, data, err) = (None, None, None, None)
if not self.is_playbook:
@ -548,14 +568,14 @@ class Runner(object):
# run the slurp module to get the metadata file
args = "src=%s" % metadata
(result1, err, executed) = self._execute_module(conn, tmp, slurp_module, args)
result1 = utils.json_loads(result1)
if not 'content' in result1 or result1.get('encoding','base64') != 'base64':
result1['failed'] = True
return self._return_from_module(conn, host, result1, err, executed)
content = base64.b64decode(result1['content'])
result1 = self._execute_module(conn, tmp, slurp_module, args)
if not 'content' in result1.result or result1.result.get('encoding','base64') != 'base64':
result1.result['failed'] = True
return result1
content = base64.b64decode(result1.result['content'])
inject = utils.json_loads(content)
# install the template module
copy_module = self._transfer_module(conn, tmp, 'copy')
@ -564,37 +584,40 @@ class Runner(object):
resultant = utils.template_from_file(utils.path_dwim(self.basedir, source),
inject, self.setup_cache, no_engine=False)
except Exception, e:
return (host, False, dict(failed=True, msg=str(e)), '')
result = dict(failed=True, msg=str(e))
return ReturnData(host=conn.host, comm_ok=False, result=result)
xfered = self._transfer_str(conn, tmp, 'source', resultant)
# run the COPY module
args = "src=%s dest=%s" % (xfered, dest)
(result1, err, executed) = self._execute_module(conn, tmp, copy_module, args)
(host, ok, data, err) = self._return_from_module(conn, host, result1, err, executed)
exec_rc = self._execute_module(conn, tmp, copy_module, args)
# modify file attribs if needed
if ok:
executed = executed.replace("copy","template",1)
return self._chain_file_module(conn, tmp, data, err, options, executed)
if exec_rc.comm_ok:
exec_rc.executed_str = exec_rc.executed_str.replace("copy","template",1)
return self._chain_file_module(conn, tmp, exec_rc, options)
else:
return (host, ok, data, err)
return exec_rc
# *****************************************************
def _executor(self, host):
try:
(host, ok, data, err) = self._executor_internal(host)
if not ok:
self.callbacks.on_unreachable(host, data)
return (host, ok, data)
exec_rc = self._executor_internal(host)
if type(exec_rc) != ReturnData:
raise Exception("unexpected return type: %s" % type(exec_rc))
if not exec_rc.comm_ok:
self.callbacks.on_unreachable(host, exec_rc.result)
return exec_rc
except errors.AnsibleError, ae:
msg = str(ae)
self.callbacks.on_unreachable(host, msg)
return [host, False, msg]
return ReturnData(host=host, comm_ok=False, result=dict(failed=True, msg=msg))
except Exception:
msg = traceback.format_exc()
self.callbacks.on_unreachable(host, msg)
return [host, False, msg]
return ReturnData(host=host, comm_ok=False, result=dict(failed=True, msg=msg))
def _executor_internal(self, host):
''' callback executed in parallel for each host. returns (hostname, connected_ok, extra) '''
@ -606,7 +629,8 @@ class Runner(object):
try:
conn = self.connector.connect(host, port)
except errors.AnsibleConnectionFailed, e:
return [ host, False, "FAILED: %s" % str(e), None ]
result = dict(failed=True, msg="FAILED: %s" % str(e))
return ReturnData(host=host, comm_ok=False, result=result)
cache = self.setup_cache.get(host, {})
module_name = utils.template(self.module_name, cache, self.setup_cache)
@ -615,56 +639,53 @@ class Runner(object):
result = None
if self.module_name == 'copy':
result = self._execute_copy(conn, host, tmp)
result = self._execute_copy(conn, tmp)
elif self.module_name == 'fetch':
result = self._execute_fetch(conn, host, tmp)
result = self._execute_fetch(conn, tmp)
elif self.module_name == 'template':
result = self._execute_template(conn, host, tmp)
result = self._execute_template(conn, tmp)
elif self.module_name == 'raw':
result = self._execute_raw(conn, host, tmp)
result = self._execute_raw(conn, tmp)
else:
if self.background == 0:
result = self._execute_normal_module(conn, host, tmp, module_name)
result = self._execute_normal_module(conn, tmp, module_name)
else:
result = self._execute_async_module(conn, host, tmp, module_name)
result = self._execute_async_module(conn, tmp, module_name)
self._delete_remote_files(conn, tmp)
conn.close()
(host, connect_ok, data, err) = result
if not connect_ok:
if not result.comm_ok:
# connection or parsing errors...
self.callbacks.on_unreachable(host, data)
else:
if 'failed' in data or 'rc' in data and str(data['rc']) != '0':
self.callbacks.on_failed(host, data)
elif 'skipped' in data:
self.callbacks.on_skipped(host)
data = result.result
if 'skipped' in data:
self.callbacks.on_skipped(result.host)
elif not result.is_successful():
self.callbacks.on_failed(result.host, result.result)
else:
self.callbacks.on_ok(host, data)
if err:
if self.debug or data.get('parsed', True) == False:
self.callbacks.on_error(host, err)
self.callbacks.on_ok(result.host, result.result)
return result
# *****************************************************
def _exec_command(self, conn, cmd, tmp, sudoable=False):
def _low_level_exec_command(self, conn, cmd, tmp, sudoable=False):
''' execute a command string over SSH, return the output '''
sudo_user = self.sudo_user
stdin, stdout, stderr = conn.exec_command(cmd, tmp, sudo_user, sudoable=sudoable)
err=None
out=None
if type(stderr) != str:
err="\n".join(stderr.readlines())
else:
err=stderr
if type(stdout) != str:
out="\n".join(stdout.readlines())
else:
out=stdout
return (out,err)
# sudo mode paramiko doesn't capture stderr, so not relaying here either...
return out
# *****************************************************
@ -679,11 +700,11 @@ class Runner(object):
if self.remote_user != 'root':
cmd = "mkdir -p %s && %s" % (basetmp, cmd)
result, err = self._exec_command(conn, cmd, None, sudoable=False)
result = self._low_level_exec_command(conn, cmd, None, sudoable=False)
cleaned = result.split("\n")[0].strip() + '/'
if self.remote_user != 'root':
cmd = 'chmod a+x %s' % cleaned
result, err = self._exec_command(conn, cmd, None, sudoable=False)
self._low_level_exec_command(conn, cmd, None, sudoable=False)
return cleaned
@ -743,11 +764,13 @@ class Runner(object):
return None
for result in results:
(host, contacted_ok, result) = result
if contacted_ok:
results2["contacted"][host] = result
host = result.host
if host is None:
raise Exception("internal error, host not set")
if result.communicated_ok():
results2["contacted"][host] = result.result
else:
results2["dark"][host] = result
results2["dark"][host] = result.result
# hosts which were contacted but never got a chance to return
for host in self.inventory.list_hosts(self.pattern):