NSSM: The Non-Sucking Service Manager\r
-Version 2.3, 2010-04-21\r
+Version 2.21, 2013-11-24\r
\r
NSSM is a service helper program similar to srvany and cygrunsrv. It can \r
start any application as an NT service and will restart the service if it \r
\r
Full documentation can be found online at\r
\r
- http://iain.cx/src/nssm/\r
+ http://nssm.cc/\r
\r
Since version 2.0, the GUI can be bypassed by entering all appropriate \r
options on the command line.\r
\r
Since version 2.3, NSSM logs to the Windows event log more elegantly.\r
\r
+Since version 2.5, NSSM respects environment variables in its parameters.\r
+\r
+Since version 2.8, NSSM tries harder to shut down the managed application\r
+gracefully and throttles restart attempts if the application doesn't run\r
+for a minimum amount of time.\r
+\r
+Since version 2.11, NSSM respects srvany's AppEnvironment parameter.\r
+\r
+Since version 2.13, NSSM is translated into French.\r
+Thanks François-Régis Tardy.\r
+\r
+Since version 2.15, NSSM is translated into Italian.\r
+Thanks Riccardo Gusmeroli.\r
+\r
+Since version 2.17, NSSM can try to shut down console applications by\r
+simulating a Control-C keypress. If they have installed a handler routine\r
+they can clean up and shut down gracefully on receipt of the event.\r
+\r
+Since version 2.17, NSSM can redirect the managed application's I/O streams\r
+to an arbitrary path.\r
+\r
+Since version 2.18, NSSM can be configured to wait a user-specified amount\r
+of time for the application to exit when shutting down.\r
+\r
+Since version 2.19, many more service options can be configured with the\r
+GUI installer as well as via the registry.\r
+\r
+Since version 2.19, NSSM can add to the service's environment by setting\r
+AppEnvironmentExtra in place of or in addition to the srvany-compatible\r
+AppEnvironment.\r
+\r
+Since version 2.22, NSSM can rotate existing output files when redirecting I/O.\r
+\r
+Since version 2.22, NSSM can set service display name, description and startup\r
+type.\r
+\r
\r
Usage\r
-----\r
\r
Don't forget to enclose paths in "quotes" if they contain spaces!\r
\r
+If you want to include quotes in the options you will need to """quote""" the\r
+quotes.\r
+\r
\r
Managing the service\r
--------------------\r
\r
With no configuration from you, NSSM will try to restart itself if it notices\r
that the application died but you didn't send it a stop signal. NSSM will\r
-keep trying, pausing 30 seconds between each attempt, until the service is\r
-successfully started or you send it a stop signal.\r
+keep trying, pausing between each attempt, until the service is successfully\r
+started or you send it a stop signal.\r
+\r
+NSSM will pause an increasingly longer time between subsequent restart attempts\r
+if the service fails to start in a timely manner, up to a maximum of four\r
+minutes. This is so it does not consume an excessive amount of CPU time trying\r
+to start a failed application over and over again. If you identify the cause\r
+of the failure and don't want to wait you can use the Windows service console\r
+(where the service will be shown in Paused state) to send a continue signal to\r
+NSSM and it will retry within a few seconds.\r
+\r
+By default, NSSM defines "a timely manner" to be within 1500 milliseconds.\r
+You can change the threshold for the service by setting the number of\r
+milliseconds as a REG_DWORD value in the registry at\r
+HKLM\SYSTEM\CurrentControlSet\Services\<service>\Parameters\AppThrottle.\r
\r
NSSM will look in the registry under\r
HKLM\SYSTEM\CurrentControlSet\Services\<service>\Parameters\AppExit for\r
-string (REG_SZ) values corresponding to the exit code of the application.\r
+string (REG_EXPAND_SZ) values corresponding to the exit code of the application.\r
If the application exited with code 1, for instance, NSSM will look for a\r
string value under AppExit called "1" or, if it does not find it, will\r
fall back to the AppExit (Default) value. You can find out the exit code\r
behaviour of srvany. The Windows Services console would show the service\r
as still running even though the application has exited.\r
\r
-If the value data is "Exit" NSSM will exit. The Windows Services console\r
-would show the service as stopped. If you wish to provide finer-grained\r
-control over service recovery you should use this code and edit the failure\r
-action manually.\r
+If the value data is "Exit" NSSM will exit gracefully. The Windows Services\r
+console would show the service as stopped. If you wish to provide\r
+finer-grained control over service recovery you should use this code and\r
+edit the failure action manually. Please note that Windows versions prior\r
+to Vista will not consider such an exit to be a failure. On older versions\r
+of Windows you should use "Suicide" instead.\r
+\r
+If the value data is "Suicide" NSSM will simulate a crash and exit without\r
+informing the service manager. This option should only be used for\r
+pre-Vista systems where you wish to apply a service recovery action. Note\r
+that if the monitored application exits with code 0, NSSM will only honour a\r
+request to suicide if you explicitly configure a registry key for exit code 0.\r
+If only the default action is set to Suicide NSSM will instead exit gracefully.\r
+\r
+\r
+Stopping the service\r
+--------------------\r
+When stopping a service NSSM will attempt several different methods of killing\r
+the monitored application, each of which can be disabled if necessary.\r
+\r
+First NSSM will attempt to generate a Control-C event and send it to the\r
+application's console. Batch scripts or console applications may intercept\r
+the event and shut themselves down gracefully. GUI applications do not have\r
+consoles and will not respond to this method.\r
+\r
+Secondly NSSM will enumerate all windows created by the application and send\r
+them a WM_CLOSE message, requesting a graceful exit.\r
+\r
+Thirdly NSSM will enumerate all threads created by the application and send\r
+them a WM_QUIT message, requesting a graceful exit. Not all applications'\r
+threads have message queues; those which do not will not respond to this\r
+method.\r
+\r
+Finally NSSM will call TerminateProcess() to request that the operating\r
+system forcibly terminate the application. TerminateProcess() cannot be\r
+trapped or ignored, so in most circumstances the application will be killed.\r
+However, there is no guarantee that it will have a chance to perform any\r
+tidyup operations before it exits.\r
+\r
+Any or all of the methods above may be disabled. NSSM will look for the\r
+HKLM\SYSTEM\CurrentControlSet\Services\<service>\Parameters\AppStopMethodSkip\r
+registry value which should be of type REG_DWORD set to a bit field describing\r
+which methods should not be applied.\r
+\r
+ If AppStopMethodSkip includes 1, Control-C events will not be generated.\r
+ If AppStopMethodSkip includes 2, WM_CLOSE messages will not be posted.\r
+ If AppStopMethodSkip includes 4, WM_QUIT messages will not be posted.\r
+ If AppStopMethodSkip includes 8, TerminateProcess() will not be called.\r
+\r
+If, for example, you knew that an application did not respond to Control-C\r
+events and did not have a thread message queue, you could set AppStopMethodSkip\r
+to 5 and NSSM would not attempt to use those methods to stop the application.\r
+\r
+Take great care when including 8 in the value of AppStopMethodSkip. If NSSM\r
+does not call TerminateProcess() it is possible that the application will not\r
+exit when the service stops.\r
+\r
+By default NSSM will allow processes 1500ms to respond to each of the methods\r
+described above before proceeding to the next one. The timeout can be\r
+configured on a per-method basis by creating REG_DWORD entries in the\r
+registry under HKLM\SYSTEM\CurrentControlSet\Services\<service>\Parameters.\r
+\r
+ AppStopMethodConsole\r
+ AppStopMethodWindow\r
+ AppStopMethodThreads\r
+\r
+Each value should be set to the number of milliseconds to wait. Please note\r
+that the timeout applies to each process in the application's process tree,\r
+so the actual time to shutdown may be longer than the sum of all configured\r
+timeouts if the application spawns multiple subprocesses.\r
+\r
+\r
+I/O redirection\r
+---------------\r
+NSSM can redirect the managed application's I/O to any path capable of being\r
+opened by CreateFile(). This enables, for example, capturing the log output\r
+of an application which would otherwise only write to the console or accepting\r
+input from a serial port.\r
+\r
+NSSM will look in the registry under\r
+HKLM\SYSTEM\CurrentControlSet\Services\<service>\Parameters for the keys\r
+corresponding to arguments to CreateFile(). All are optional. If no path is\r
+given for a particular stream it will not be redirected. If a path is given\r
+but any of the other values are omitted they will be receive sensible defaults.\r
+\r
+ AppStdin: Path to receive input.\r
+ AppStdout: Path to receive output.\r
+ AppStderr: Path to receive error output.\r
+\r
+Parameters for CreateFile() are providing with the "AppStdinShareMode",\r
+"AppStdinCreationDisposition" and "AppStdinFlagsAndAttributes" values (and\r
+analogously for stdout and stderr).\r
+\r
+In general, if you want the service to log its output, set AppStdout and\r
+AppStderr to the same path, eg C:\Users\Public\service.log, and it should\r
+work. Remember, however, that the path must be accessible to the user\r
+running the service.\r
+\r
+\r
+File rotation\r
+-------------\r
+When using I/O redirection, NSSM can rotate existing output files prior to\r
+opening stdout and/or stderr. An existing file will be renamed with a\r
+suffix based on the file's last write time, to millisecond precision. For\r
+example, the file nssm.log might be rotated to nssm-20131221T113939.457.log.\r
+\r
+NSSM will look in the registry under\r
+HKLM\SYSTEM\CurrentControlSet\Services\<service>\Parameters for REG_DWORD\r
+entries which control how rotation happens.\r
+\r
+If AppRotateFiles is missing or set to 0, rotation is disabled. Any non-zero\r
+value enables rotation.\r
+\r
+If AppRotateSeconds is non-zero, a file will not be rotated if its last write\r
+time is less than the given number of seconds in the past.\r
+\r
+If AppRotateBytes is non-zero, a file will not be rotated if it is smaller\r
+than the given number of bytes. 64-bit file sizes can be handled by setting\r
+a non-zero value of AppRotateBytesHigh.\r
+\r
+Rotation is independent of the CreateFile() parameters used to open the files.\r
+They will be rotated regardless of whether NSSM would otherwise have appended\r
+or replaced them.\r
+\r
+\r
+Environment variables\r
+---------------------\r
+NSSM can replace or append to the managed application's environment. Two\r
+multi-valued string (REG_MULTI_SZ) registry values are recognised under\r
+HKLM\SYSTEM\CurrentControlSet\Services\<service>\Parameters.\r
+\r
+AppEnvironment defines a list of environment variables which will override\r
+the service's environment. AppEnvironmentExtra defines a list of\r
+environment variables which will be added to the service's environment.\r
+\r
+Each entry in the list should be of the form KEY=VALUE. It is possible to\r
+omit the VALUE but the = symbol is mandatory.\r
+\r
+srvany only supports AppEnvironment.\r
\r
\r
Removing services using the GUI\r
\r
Building NSSM from source\r
-------------------------\r
-NSSM is known to compile with Visual Studio 6, Visual Studio 2005 and Visual\r
-Studio 2008.\r
+NSSM is known to compile with Visual Studio 2008. Older Visual Studio\r
+releases may or may not work.\r
+\r
+NSSM will also compile with Visual Studio 2010 but the resulting executable\r
+will not run on versions of Windows older than XP SP2. If you require\r
+compatiblity with older Windows releases you should change the Platform\r
+Toolset to v90 in the General section of the project's Configuration\r
+Properties.\r
\r
\r
Credits\r
-------\r
+Thanks to Bernard Loh for finding a bug with service recovery.\r
Thanks to Benjamin Mayrargue (www.softlion.com) for adding 64-bit support.\r
Thanks to Joel Reingold for spotting a command line truncation bug.\r
+Thanks to Arve Knudsen for spotting that child processes of the monitored\r
+application could be left running on service shutdown, and that a missing\r
+registry value for AppDirectory confused NSSM.\r
+Thanks to Peter Wagemans and Laszlo Keresztfalvi for suggesting throttling restarts.\r
+Thanks to Eugene Lifshitz for finding an edge case in CreateProcess() and for\r
+advising how to build messages.mc correctly in paths containing spaces.\r
+Thanks to Rob Sharp for pointing out that NSSM did not respect the\r
+AppEnvironment registry value used by srvany.\r
+Thanks to Szymon Nowak for help with Windows 2000 compatibility.\r
+Thanks to François-Régis Tardy for French translation.\r
+Thanks to Emilio Frini for spotting that French was inadvertently set as\r
+the default language when the user's display language was not translated.\r
+Thanks to Riccardo Gusmeroli for Italian translation.\r
+Thanks to Eric Cheldelin for the inspiration to generate a Control-C event\r
+on shutdown.\r
+Thanks to Brian Baxter for suggesting how to escape quotes from the command prompt.\r
+Thanks to Russ Holmann for suggesting that the shutdown timeout be configurable.\r
+Thanks to Paul Spause for spotting a bug with default registry entries.\r
+Thanks to BUGHUNTER for spotting more GUI bugs.\r
+Thanks to Doug Watson for suggesting file rotation.\r
\r
Licence\r
-------\r
git://git.iain.cx/iain / nssm.git / blobdiff