kamailio dispatch负载均衡

最新推荐文章于 2025-02-19 08:03:42 发布

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最新推荐文章于 2025-02-19 08:03:42 发布

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分类专栏： sip 文章标签： sip

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kamailio的前身叫openser, 和opensips是兄弟，作为出色的sip proxy，在大并发量使用时经常用于负载均衡媒体服务器 Asterisk、Freeswitch等实现集群。

1. 安装kamailio
参考上一篇文章安装：http://www.aiuxian.com/article/p-1454911.html

2. 配置 kamailio

下面为配置好的主配置文件，dispacher模块有一些参数需要注意，默认下一跳地址的配置支持数据库和文本文件，本文测试默认使用文本文件方式，
不用mysql数据库存储，注释掉下面两行。
#modparam("dispatcher", "db_url", DBURL)
#modparam("dispatcher", "table_name", "dispatcher")
设置默认配置下一跳的文本文件位置：
modparam("dispatcher", "list_file", "/usr/local/etc/kamailio/dispatcher.list")

/usr/local/etc/kamailio/dispatcher.list
文件添加freeswitch地址
1 sip:192.168.5.4:5080
1 sip:192.168.5.5:5080
1 sip:192.168.5.6:5080

通过path 支持注册消息下一跳的记录。

定制化的kamailio配置文件如下：

 
#!KAMAILIO
 
#
 
# sample config file for dispatcher module
 
# - load balancing of VoIP calls with round robin
 
# - dispatch REGISTER and presence requests
 
#
 
#
 
# Direct your questions about this file to: sr-users@lists.sip-router.org
 
#
 
# Refer to the Core CookBook at http://www.kamailio.org/dokuwiki/doku.php
 
# for an explanation of possible statements, functions and parameters.
 
#
 
# Several features can be enabled using '#!define WITH_FEATURE' directives:
 
#
 
# *** To run in debug mode:
 
#     - define WITH_DEBUG
 
#
 
 
 
#!ifndef DBURL
 
#!define DBURL "mysql://kamailio:kamailiorw@localhost/kamailio"
 
#!endif
 
 
 
####### Global Parameters #########
 
 
 
#!ifdef WITH_DEBUG
 
debug=4
 
log_stderror=yes
 
#!else
 
debug=2
 
log_stderror=no
 
#!endif
 
 
 
 
 
memdbg=5
 
memlog=5
 
 
 
log_facility=LOG_LOCAL0
 
 
 
fork=yes
 
children=4
 
 
 
/* comment the next line to enable TCP */
 
disable_tcp=no
 
 
 
/* uncomment the next line to disable the auto discovery of local aliases
 
   based on revers DNS on IPs (default on) */
 
auto_aliases=no
 
 
 
/* add local domain aliases */
 
# alias="mysipserver.com"
 
 
 
port=60600
 
 
 
/* uncomment and configure the following line if you want Kamailio to
 
   bind on a specific interface/port/proto (default bind on all available) */
 
# listen=udp:127.0.0.1:5060
 
listen=udp:192.168.5.3:60600
 
 
 
sip_warning=no
 
 
 
####### Modules Section ########
 
 
 
#set module path
 
mpath="/usr/local/lib/kamailio/modules_k/:/usr/local/lib64/kamailio/modules/"
 
 
 
loadmodule "db_mysql.so"
 
loadmodule "mi_fifo.so"
 
loadmodule "kex.so"
 
loadmodule "tm.so"
 
loadmodule "tmx.so"
 
loadmodule "sl.so"
 
loadmodule "rr.so"
 
loadmodule "pv.so"
 
loadmodule "maxfwd.so"
 
loadmodule "textops.so"
 
loadmodule "siputils.so"
 
loadmodule "xlog.so"
 
loadmodule "sanity.so"
 
loadmodule "ctl.so"
 
loadmodule "mi_rpc.so"
 
loadmodule "acc.so"
 
loadmodule "dispatcher.so"
 
 
 
 
 
# ----------------- setting module-specific parameters ---------------
 
 
 
 
 
# ----- mi_fifo params -----
 
modparam("mi_fifo", "fifo_name", "/tmp/kamailio_fifo")
 
 
 
 
 
# ----- rr params -----
 
# add value to ;lr param to cope with most of the UAs
 
modparam("rr", "enable_full_lr", 1)
 
# do not append from tag to the RR (no need for this script)
 
modparam("rr", "append_fromtag", 0)
 
 
 
 
 
# ----- acc params -----
 
modparam("acc", "log_flag", 1)
 
modparam("acc", "failed_transaction_flag", 3)
 
modparam("acc", "log_extra",
 
    "src_user=$fU;src_domain=$fd;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd;src_ip=$si")
 
 
 
# ----- tm params -----
 
modparam("tm", "fr_timer", 2000)
 
modparam("tm", "fr_inv_timer", 40000)
 
 
 
# ----- dispatcher params -----
 
#modparam("dispatcher", "db_url", DBURL)
 
#modparam("dispatcher", "table_name", "dispatcher")
 
modparam("dispatcher", "list_file", "/usr/local/etc/kamailio/dispatcher.list")
 
modparam("dispatcher", "flags", 2)
 
modparam("dispatcher", "dst_avp", "$avp(AVP_DST)")
 
modparam("dispatcher", "grp_avp", "$avp(AVP_GRP)")
 
modparam("dispatcher", "cnt_avp", "$avp(AVP_CNT)")
 
modparam("dispatcher", "sock_avp", "$avp(AVP_SOCK)")
 
modparam("path", "use_received", 1)
 
####### Routing Logic ########
 
 
 
 
 
# main request routing logic
 
 
 
route {
 
 
 
    # per request initial checks
 
    route(REQINIT);
 
 
 
    # handle requests within SIP dialogs
 
    route(WITHINDLG);
 
 
 
    ### only initial requests (no To tag)
 
 
 
    # CANCEL processing
 
    if (is_method("CANCEL"))
 
    {
 
        if (t_check_trans())
 
            t_relay();
 
        exit;
 
    }
 
 
 
    t_check_trans();
 
 
 
    # record routing for dialog forming requests (in case they are routed)
 
    # - remove preloaded route headers
 
    remove_hf("Route");
 
    if (is_method("INVITE|SUBSCRIBE"))
 
        record_route();
 
 
 
    # account only INVITEs
 
    if (is_method("INVITE"))
 
    {
 
        setflag(1); # do accounting
 
    }
 
 
 
    # handle presence related requests
 
    route(PRESENCE);
 
 
 
    # handle registrations
 
    route(REGISTRAR);
 
 
 
    if ($rU==$null)
 
    {
 
        # request with no Username in RURI
 
        sl_send_reply("484","Address Incomplete");
 
        exit;
 
    }
 
 
 
    # dispatch destinations
 
    route(DISPATCH);
 
}
 
 
 
 
 
route[RELAY] {
 
    if (!t_relay()) {
 
        sl_reply_error();
 
    }
 
    exit;
 
}
 
 
 
# Per SIP request initial checks
 
route[REQINIT] {
 
    if (!mf_process_maxfwd_header("10")) {
 
        sl_send_reply("483","Too Many Hops");
 
        exit;
 
    }
 
 
 
    if(!sanity_check("1511", "7"))
 
    {
 
        xlog("Malformed SIP message from $si:$sp\n");
 
        exit;
 
    }
 
}
 
 
 
# Handle requests within SIP dialogs
 
route[WITHINDLG] {
 
    if (has_totag()) {
 
        # sequential request withing a dialog should
 
        # take the path determined by record-routing
 
        if (loose_route()) {
 
            if (is_method("BYE")) {
 
                setflag(1); # do accounting ...
 
                setflag(3); # ... even if the transaction fails
 
            }
 
            route(RELAY);
 
        } else {
 
            if (is_method("SUBSCRIBE") && uri == myself) {
 
                # in-dialog subscribe requests
 
                route(PRESENCE);
 
                exit;
 
            }
 
            if ( is_method("ACK") ) {
 
                if ( t_check_trans() ) {
 
                    # non loose-route, but stateful ACK;
 
                    # must be ACK after a 487 or e.g. 404 from upstream server
 
                    t_relay();
 
                    exit;
 
                } else {
 
                    # ACK without matching transaction ... ignore and discard.
 
                    exit;
 
                }
 
            }
 
            sl_send_reply("404","Not here");
 
        }
 
        exit;
 
    }
 
}
 
 
 
# Handle SIP registrations
 
route[REGISTRAR] {
 
    if(!is_method("REGISTER"))
 
        return;
 
    add_path_received();
 
    route(DISPATCH);
 
    exit;
 
}
 
 
 
# Presence server route
 
route[PRESENCE] {
 
    if(!is_method("PUBLISH|SUBSCRIBE"))
 
        return;
 
 
 
    sl_send_reply("404", "Not here");
 
    exit;
 
}
 
 
 
# Dispatch requests
 
route[DISPATCH] {
 
    # round robin dispatching on gateways group '1'
 
    if(!ds_select_dst("1", "4"))
 
    {
 
        send_reply("404", "No destination");
 
        exit;
 
    }
 
    xlog("L_DBG", "--- SCRIPT: going to <$ru> via <$du>\n");
 
    t_on_failure("RTF_DISPATCH");
 
    route(RELAY);
 
    exit;
 
}
 
 
 
# Sample failure route
 
failure_route[RTF_DISPATCH] {
 
    if (t_is_canceled()) {
 
        exit;
 
    }
 
    # next DST - only for 500 or local timeout
 
    if (t_check_status("500")
 
            or (t_branch_timeout() and !t_branch_replied()))
 
    {
 
        if(ds_next_dst())
 
        {
 
            t_on_failure("RTF_DISPATCH");
 
            route(RELAY);
 
            exit;
 
        }
 
    }
 
}