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|
--
-- sfive
--
-- sfive - spreadspace streaming statistics suite is a generic
-- statistic collection tool for streaming server infrastuctures.
-- The system collects and stores meta data like number of views
-- and throughput from a number of streaming servers and stores
-- it in a global data store.
-- The data acquisition is designed to be generic and extensible in
-- order to support different streaming software.
-- sfive also contains tools and applications to filter and visualize
-- live and recorded data.
--
--
-- Copyright (C) 2014 Christian Pointner <equinox@spreadspace.org>
-- Markus Grueneis <gimpf@gimpf.org>
--
-- This file is part of sfive.
--
-- sfive is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License version 3
-- as published by the Free Software Foundation.
--
-- sfive is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with sfive. If not, see <http://www.gnu.org/licenses/>.
--
--
-- Install this by adding the following to your nginx.conf
--
-- http {
-- .....
--
-- lua_shared_dict sfive 64k;
-- lua_shared_dict sfive_locks 64k;
-- lua_shared_dict sfive_data 64m;
-- init_by_lua 's5 = require "s5-nginx.lua"';
-- init_worker_by_lua '
-- s5.init_worker("myhostname", 5, "/path/to/sfive.sock",
-- { "tag1", "tag2" },
-- { { content="A", format="1", quality="low" },
-- { content="A", format="1", quality="high" },
-- { content="B", format="1", quality="low" },
-- { content="B", format="1", quality="high" },
-- { content="A", format="2", quality="low" },
-- { content="A", format="2", quality="high" },
-- { content="B", format="2", quality="low" },
-- { content="B", format="2", quality="high" } })
-- ';
--
-- .....
--
-- server {
--
-- .....
--
-- location /path/to/fromat1/contentA-low/ {
-- log_by_lua 's5.log("A", "1", "low")';
-- }
-- location /path/to/fromat1/contentA-high/ {
-- log_by_lua 's5.log("A", "1", "high")';
-- }
-- .....
--
-- }
--
locks = require "resty.lock"
local _SFIVE = {}
-----------------------------------------------
-- this will only be shared within one worker
local config = {
hostname = "unknown",
duration = 5,
sockpath = "/var/run/sfive.sock",
tags = {},
streamer = {}
}
local sfive = ngx.shared.sfive
local sfive_data = ngx.shared.sfive_data
-----------------------------------------------
function _SFIVE.log(content, format, quality)
local status = ngx.var.status
if status == '200' or status == '206' then
-- TODO: acquire(data_lock), update(data), release(data_lock)
ngx.log(ngx.ERR, "SFive(log): won't add data from " .. ngx.var.remote_addr ..
" to (" .. content .. ", " .. format .. ", " .. quality .. "): not implemented yet!")
-- local json = '{'
-- json = json .. '"time": "' .. string.gsub(ngx.utctime(), " ", "T", 1) .. 'Z",'
-- json = json .. '"client": "' .. ngx.var.remote_addr .. '",'
-- json = json .. '"port": ' .. ngx.var.remote_port .. ','
-- json = json .. '"ua": "' .. ngx.var.http_user_agent .. '",'
-- json = json .. '"uri": "' .. ngx.var.uri .. '",'
-- json = json .. '"status": ' .. status .. ','
-- json = json .. '"bytes_sent": ' .. ngx.var.bytes_sent
-- json = json .. '}'
end
end
local connect = function()
ngx.log(ngx.INFO, "SFive(connect): trying to connect to '" .. config.sockpath .."'")
local sock = ngx.socket.udp()
local ok, err = sock:setpeername("unix:" .. config.sockpath)
if not ok then
return nil, "connect to '" .. config.sockpath .. "' failed: " .. err
end
return sock
end
local get_data_streamer = function(content, format, quality)
return '{ "client-count": 0, "bytes-sent": 0 }'
end
local send_data = function(sock, starttime)
for i, s in ipairs(config.streamer) do
local json = '{'
json = json .. '"start-time": "' .. starttime .. 'Z", '
json = json .. '"duration-ms": "' .. config.duration * 1000 .. '", '
json = json .. '"streamer-id": { "content-id": "' .. s.content .. '", ' ..
'"format": "' .. s.format .. '", ' ..
'"quality": "' .. s.quality .. '" }, '
json = json .. '"data": ' .. get_data_streamer(s.content, s.format, s.quality)
json = json .. '}\n'
local ok, err = sock:send(json)
if not ok then
return nil, err
end
end
return true
end
local send_init = function(sock)
local json = '{'
json = json .. '"version": 1, '
json = json .. '"hostname": "' .. config.hostname .. '", '
json = json .. '"tags": ['
for i, k in ipairs(config.tags) do
json = json .. (i==1 and '' or ',') .. '"' .. k .. '"'
end
json = json .. ']'
json = json .. '}\n'
return sock:send(json)
end
local send_updates = function(sock, starttime, lock)
ret = true
local elapsed, err = lock:lock("data")
if not elapsed then
ngx.log(ngx.ERR, "SFive(task): lock error: " .. err)
ret = false
else
local ok, err = send_data(sock, starttime)
if not ok then
ngx.log(ngx.ERR, "SFive(task): sending data failed: " .. err)
sock:close()
ret = false
else
sfive_data:flush_all()
sfive_data:flush_expired()
end
ok, err = lock:unlock("data")
if not ok then
ngx.log(ngx.ERR, "SFive(init): unlock error: " .. err)
ret = false
end
end
return ret
end
local task = function()
local sock, err = connect(config.sockpath)
if not sock then
ngx.log(ngx.ERR, "SFive(task): connect(): " .. err)
return
else
local ok, err = send_init(sock)
if not ok then
ngx.log(ngx.ERR, "SFive(task): sending init failed: " .. err)
sock:close()
return
end
end
sfive_data:flush_all()
sfive_data:flush_expired()
local lock = locks:new("sfive_locks")
while true do
local starttime = string.gsub(ngx.utctime(), " ", "T", 1)
ngx.sleep(config.duration)
if not send_updates(sock, starttime, lock) then
return
end
end
end
local launcher
launcher = function(premature)
local task = ngx.thread.spawn(task)
ngx.thread.wait(task)
if premature then
return
end
local ok, err = ngx.timer.at(2, launcher)
if not ok then
ngx.log(ngx.ERR, "SFive(launcher): failed to reenqueue myself: ", err)
inst.flags:delete("running")
return
end
end
local init = function()
local ok, err = sfive:add("running", true)
if not ok then
if err ~= "exists" then
ngx.log(ngx.ERR, "SFive(init): failed to set running flag: " .. err)
end
return
end
sfive_data:flush_all()
sfive_data:flush_expired()
ok, err = ngx.timer.at(0, launcher)
if not ok then
ngx.log(ngx.ERR, "SFive(init): failed to enqueue sfive launcher: ", err)
return
end
ngx.log(ngx.INFO, "SFive(init): task initialized successfully!")
end
function _SFIVE.init_worker(hostname, duration, sockpath, tags, streamer)
config.hostname = hostname
config.duration = duration
config.sockpath = sockpath
config.tags = (tags and tags or {})
config.streamer = (streamer and streamer or {})
init()
ngx.log(ngx.INFO, "SFive(init): worker initialized successfully!")
end
ngx.log(ngx.DEBUG, "SFive: loaded successfully")
return _SFIVE
|
