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Diffstat (limited to 'examples/lua/event_handler.lua')
| -rw-r--r-- | examples/lua/event_handler.lua | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/examples/lua/event_handler.lua b/examples/lua/event_handler.lua new file mode 100644 index 0000000..41ed712 --- /dev/null +++ b/examples/lua/event_handler.lua @@ -0,0 +1,28 @@ +-- haproxy event-handling from Lua +-- +-- This file serves as a demo to show you the various events that +-- can be handled directly from custom lua functions. +-- Events captured from lua will be printed directly to STDOUT +-- It may not be exhaustive, please refer to the lua documentation +-- in doc/lua-api/index.rst for up-to-date content and further explanations + +-- subscribe to every SERVER family events, this is the equivalent of doing: +-- core.event_sub({"SERVER_ADD", "SERVER_DEL", "SERVER_UP", "SERVER_DOWN"}, ...) +core.event_sub({"SERVER"}, function(event, data) + -- This function will be called when: + -- - new server is added from the CLI (SERVER_ADD) + -- - existing server is removed from the CLI (SERVER_DEL) + -- - existing server state changes from UP to DOWN (SERVER_DOWN) + -- - existing server state changes from DOWN to UP (SERVER_UP) + -- If the server still exists at the time the function is called, data["reference"] + -- contains a valid reference to the lua server object related to the event + -- + sv_status = data["reference"] ~= nil and data["reference"]:get_stats().status or "DELETED" + print("[DEBUG - FROM LUA]", "EventType." .. event .. ": " .. + "server " .. data["proxy_name"] .. "/" .. data["name"] .. " " .. + "is " .. sv_status) +end) +-- Please note that you may also use Server.event_sub() method to subscribe to events +-- relative to a specific server only. See the lua documentation for more information. + +-- New event families will be added over time... |