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74 lines
2.2 KiB
Plaintext
74 lines
2.2 KiB
Plaintext
Multi script langyage Stream Processing Offload Agent
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-----------------------------------------------------
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This agent receive SPOP message and process it with script languages. The
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language register callback with a message. Each callback receive the list
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of arguments with types according with the language capabilities. The
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callback write variables which are sent as response when the processing
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is done.
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Compilation
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---------------
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Actually, the server support Lua and Python. Type "make" with the options:
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USE_LUA=1 and/or USE_PYTHON=1.
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Start the service
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---------------------
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After you have compiled it, to start the service, you just need to use "spoa"
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binary:
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$> ./spoa -h
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Usage: ./spoa [-h] [-d] [-p <port>] [-n <num-workers>]
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-h Print this message
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-d Enable the debug mode
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-p <port> Specify the port to listen on (default: 12345)
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-n <num-workers> Specify the number of workers (default: 5)
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-f <file> Load script according with the supported languages
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The file processor is recognized using the extension. .lua or .luac for lua and
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.py for python. Start example:
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$> ./spoa -d -f ps_lua.lua
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$> ./spoa -d -f ps_pyhton.py
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Configure
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-------------
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Sample configuration are join to this server:
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spoa-server.conf : The HAProxy configuration file using SPOE server
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spoa-server.spoe.conf : The SPOP description file used by HAProxy
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ps_lua.lua : Processing Lua example
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ps_python.py : Processing Python example
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Considerations
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------------------
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This server is a beta version. It works fine, but some improvement will be
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welcome:
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Main process:
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* Improve log management: Today the log are sent on stdout.
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* Improve process management: The dead process are ignored.
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* Implement systemd integration.
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* Implement threads: It would be fine to implement thread working. Shared
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memory is welcome for managing database connection pool and something like
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that.
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* Add PHP support and some other languages.
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Python:
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* Improve repporting: Catch python error message and repport it in the right
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place. Today the error are dumped on stdout. How using syslog for logging
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stack traces ?
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Maybe some other things...
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