Skynet框架2分离Master与Harbor

           Skynet默认的配置是把Master与Harbor集成到一个结点了，为了更清楚的了解Skynet框架，需要分离Master与Harbor，这就需要了解Skynet是如何配置的及Skynet的启动流程及各个参数的作用.

root = "./"
thread = 8
logger = nil
harbor = 1
address = "127.0.0.1:2525"
master = "127.0.0.1:2012"
start = "main"
standalone = "0.0.0.0:2012"
luaservice = root.."service/?.lua;"..root.."service/?/init.lua"
cpath = root.."service/?.so"
protopath = root.."proto"
redis = root .. "redisconf"

这是Skynet的默认配置，skynet_main.c的main函数从配置文件中读取这些值，并赋给config对象,skynet_start函数就使用这些配置参数，启动skynet。

    if (config->standalone) {
        if (_start_master(config->standalone)) {
            return;
        }
    }
    // harbor must be init first
    if (skynet_harbor_start(config->master , config->local)) {
        fprintf(stderr, "Init fail : no master");
        return;
    }

         可以看到master与harbor核心区别在于standalone参数，如果配置了这个参数skynet就会把该结点视作一个master，同时master的本质上也是一个harbor，所以必须配置address参数，这个参数就是harbor结点的地址，如果一个harbor不是master，则必须配置master参数，告诉该harbor结点在哪一个master集群里。

        start参数是对应的lua文件，它们于service目录。

local skynet = require "skynet"

skynet.start(function()
    print("Server start")
    local service = skynet.launch("snlua","service_mgr")
    local connection = skynet.launch("connection","256")
    local lualog = skynet.launch("snlua","lualog")
    local console = skynet.launch("snlua","console")
    local remoteroot = skynet.launch("snlua","remote_root")
    local watchdog = skynet.launch("snlua","watchdog","8889 4 0")
    local db = skynet.launch("snlua","simpledb")
--    skynet.launch("snlua","testgroup")

    skynet.exit()
end)

这是默认的main.lua，分离位于同一结点的master与harbor，最重要的是master不需要启动一个watchdog这个网关服务，所以把main.lua拷贝为main_master.lua，并注释掉watchdog，最终配置文件为

config_master

root = "./"
thread = 8
logger = nil
harbor = 1
address = "127.0.0.1:2525"
start = "main_master"
standalone = "0.0.0.0:2012"
cpath = root.."service/?.so"
protopath = root.."proto"

config_harbor

root = "./"
thread = 8
logger = nil
harbor = 1
address = "127.0.0.1:2526"
master = "127.0.0.1:2012"
start = "main"
luaservice = root.."service/?.lua;"..root.."service/?/init.lua"
cpath = root.."service/?.so"
protopath = root.."proto"
redis = root .. "redisconf"

这个时候再启动skynet，clinet连接，就发现master与harbor已经分离了。

但此时的harbor结点，还起着网关的作用，所以可以另外起一个harbor，充当网关,config_gateway

root = "./"
thread = 8
logger = nil
harbor = 1
address = "127.0.0.1:2528"
master = "127.0.0.1:2012"
start = "main_gateway"
luaservice = root.."service/?.lua;"..root.."service/?/init.lua"
cpath = root.."service/?.so"
protopath = root.."proto"
redis = root .. "redisconf"

其实也就是让另一个harbor不起网关.

现在只是增加了几个配置文件，就已经有了客户端，网关服务，log服务，可以看到一个网游服务器的雏形已经出来了。