Announcing HAProxy 2.7

blog20221128-01.cfg

peers mypeers
  bind 0.0.0.0:10000
  shards 2
  server lb1
  server peer1 192.168.56.40:10000 shard 1
  server peer2 192.168.56.41:10000 shard 2
  table rates type binary  len 20  size 100k  expire 10s  store http_req_rate(10s)

blog20221128-02.lua

-- script arguments are put into variable 'args'
local args = table.pack(...)

local arg1 = args[1]  -- returns 'hello'
local arg2 = args[2]  -- returns 123

-- this function prints the arguments when
-- 'http-request lua.log-args' is called
local function log_args(txn)
    core.Info(arg1)
    core.Info(arg2)
end

core.register_action("log-args", {"http-req"}, log_args, 0)

blog20221128-03.cfg

global
  lua-load /path/to/script.lua "hello" 123

blog20221128-04.cfg

frontend mysite
  bind :80
  default_backend servers

  # call the action
  http-request lua.log-args

blog20221128-05.sh

$ echo "reload" | sudo socat -t300 /run/haproxy-master.sock -
Success=1
--
[NOTICE]   (2495) : New worker (2546) forked
[NOTICE]   (2495) : Loading success.
[NOTICE]   (2495) : haproxy version is 2.7
[NOTICE]   (2495) : path to executable is /usr/sbin/haproxy
[WARNING]  (2495) : Former worker (2538) exited with code 0 (Exit)