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itminedu
snf-ganeti
Commits
25d6d12a
Commit
25d6d12a
authored
Aug 08, 2008
by
Michael Hanselmann
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Implement queue locking in node daemon
Reviewed-by: iustinp
parent
5d6fb8eb
Changes
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daemons/ganeti-noded
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daemons/ganeti-noded
View file @
25d6d12a
...
...
@@ -39,11 +39,15 @@ from ganeti import logger
from
ganeti
import
constants
from
ganeti
import
objects
from
ganeti
import
errors
from
ganeti
import
jstore
from
ganeti
import
ssconf
from
ganeti
import
http
from
ganeti
import
utils
queue_lock
=
None
class
NodeDaemonRequestHandler
(
http
.
HTTPRequestHandler
):
"""The server implementation.
...
...
@@ -539,7 +543,15 @@ class NodeDaemonRequestHandler(http.HTTPRequestHandler):
"""
(
file_name
,
content
)
=
params
return
backend
.
JobQueueUpdate
(
file_name
,
content
)
# Locking in exclusive, blocking mode because there could be several
# children running at the same time.
# TODO: Implement nonblocking locking with retries?
queue_lock
.
Exclusive
(
blocking
=
True
)
try
:
return
backend
.
JobQueueUpdate
(
file_name
,
content
)
finally
:
queue_lock
.
Unlock
()
@
staticmethod
def
perspective_jobqueue_purge
(
params
):
...
...
@@ -600,6 +612,8 @@ def main():
"""Main function for the node daemon.
"""
global
queue_lock
options
,
args
=
ParseOptions
()
utils
.
debug
=
options
.
debug
for
fname
in
(
constants
.
SSL_CERT_FILE
,):
...
...
@@ -640,6 +654,9 @@ def main():
stderr_logging
=
not
options
.
fork
)
logging
.
info
(
"ganeti node daemon startup"
)
# Prepare job queue
queue_lock
=
jstore
.
InitAndVerifyQueue
(
must_lock
=
False
)
if
options
.
fork
:
server
=
ForkingHTTPServer
((
''
,
port
))
else
:
...
...
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