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For now: basic server event handling from lua, events are printed to STDOUT. The idea behind this is to provide simple and easy-to-use examples that serve as a basic introduction for lua event handler feature.
29 lines
1.5 KiB
Lua
29 lines
1.5 KiB
Lua
-- haproxy event-handling from Lua
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--
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-- This file serves as a demo to show you the various events that
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-- can be handled directly from custom lua functions.
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-- Events captured from lua will be printed directly to STDOUT
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-- It may not be exhaustive, please refer to the lua documentation
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-- in doc/lua-api/index.rst for up-to-date content and further explanations
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-- subscribe to every SERVER family events, this is the equivalent of doing:
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-- core.event_sub({"SERVER_ADD", "SERVER_DEL", "SERVER_UP", "SERVER_DOWN"}, ...)
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core.event_sub({"SERVER"}, function(event, data)
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-- This function will be called when:
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-- - new server is added from the CLI (SERVER_ADD)
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-- - existing server is removed from the CLI (SERVER_DEL)
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-- - existing server state changes from UP to DOWN (SERVER_DOWN)
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-- - existing server state changes from DOWN to UP (SERVER_UP)
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-- If the server still exists at the time the function is called, data["reference"]
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-- contains a valid reference to the lua server object related to the event
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--
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sv_status = data["reference"] ~= nil and data["reference"]:get_stats().status or "DELETED"
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print("[DEBUG - FROM LUA]", "EventType." .. event .. ": " ..
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"server " .. data["proxy_name"] .. "/" .. data["name"] .. " " ..
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"is " .. sv_status)
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end)
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-- Please note that you may also use Server.event_sub() method to subscribe to events
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-- relative to a specific server only. See the lua documentation for more information.
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-- New event families will be added over time...
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