Re: [SR-Users] dispatcher.list reversed by dispatch.c reindex_dests()

Hello,

you have to set the priority field to get them ordered as desired.

With text file is easier to know (or better said expect) the order as it is written, but for database, there is no guarantee that if you insert three destinations, will be returned in the order of inserting. Therefore, the loading of destinations is not caring of the order retrieved from the storage, will use priority to sort them.

Cheers, Daniel

On 21/09/15 13:13, Giovanni Maruzzelli wrote:

Anyone got this one ?

sent from my mobile, Giovanni Maruzzelli cell: +39 347 266 56 18

On Sep 19, 2015 7:58 PM, "Giovanni Maruzzelli" <gmaruzz@gmail.com mailto:gmaruzz@gmail.com> wrote:

Hello,

dispatcher gives me destination sets with entries in reverse order:

I have installed from Kamailio deb repository packages version
4.3.2+jessie.

# kamailio -V
version: kamailio 4.3.2 (x86_64/linux)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS,
USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM,
SHM_MMAP, PKG_MALLOC, F_MALLOC, DBG_F_MALLOC, USE_FUTEX,
FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER,
USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN
16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled with gcc 4.9.2

I configured dispatcher:

modparam("dispatcher", "use_default", 1)
modparam("dispatcher", "list_file", "/etc/kamailio/dispatcher.list")
modparam("dispatcher", "flags", 3)
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("dispatcher", "ds_ping_interval", 5)
modparam("dispatcher", "ds_probing_mode", 1)

I have this dispatcher.list:

1 sip:192.168.1.144:5060 <http://192.168.1.144:5060> 2
1 sip:192.168.1.145:5060 <http://192.168.1.145:5060> 2
1 sip:192.168.1.146:5060 <http://192.168.1.146:5060> 2

2 sip:192.168.1.146:5060 <http://192.168.1.146:5060> 2
2 sip:192.168.1.145:5060 <http://192.168.1.145:5060> 2

So, I expect dispatcher to have:

set 1 first two destinations in distribution via hash on callid,
and third destination as failover (192.168.1.146
<http://192.168.1.146:5060>) .
set 2 all traffic on first destination, and if first fails, all
traffic will failover to second destination (192.168.1.145
<http://192.168.1.146:5060>).

Instead reindex_dests shuffle the sets upside down:

DEBUG: dispatcher [dispatch.c:375]: add_dest2list(): dest [1/1]
<sip:192.168.1.144:5060 <http://192.168.1.144:5060>>
DEBUG: dispatcher [dispatch.c:375]: add_dest2list(): dest [1/2]
<sip:192.168.1.145:5060 <http://192.168.1.145:5060>>
DEBUG: dispatcher [dispatch.c:375]: add_dest2list(): dest [1/3]
<sip:192.168.1.146:5060 <http://192.168.1.146:5060>>
DEBUG: dispatcher [dispatch.c:375]: add_dest2list(): dest [2/1]
<sip:192.168.1.146:5060 <http://192.168.1.146:5060>>
DEBUG: dispatcher [dispatch.c:375]: add_dest2list(): dest [2/2]
<sip:192.168.1.145:5060 <http://192.168.1.145:5060>>
DEBUG: dispatcher [dispatch.c:494]: reindex_dests(): found [2]
dest sets
DEBUG: dispatcher [dispatch.c:139]: ds_print_sets(): dst>> 2
sip:192.168.1.145:5060 <http://192.168.1.145:5060> 2 0 (,0,0)
DEBUG: dispatcher [dispatch.c:139]: ds_print_sets(): dst>> 2
sip:192.168.1.146:5060 <http://192.168.1.146:5060> 2 0 (,0,0)
DEBUG: dispatcher [dispatch.c:139]: ds_print_sets(): dst>> 1
sip:192.168.1.146:5060 <http://192.168.1.146:5060> 2 0 (,0,0)
DEBUG: dispatcher [dispatch.c:139]: ds_print_sets(): dst>> 1
sip:192.168.1.145:5060 <http://192.168.1.145:5060> 2 0 (,0,0)
DEBUG: dispatcher [dispatch.c:139]: ds_print_sets(): dst>> 1
sip:192.168.1.144:5060 <http://192.168.1.144:5060> 2 0 (,0,0)
DEBUG: dispatcher [dispatcher.c:347]: mod_init(): loaded
dispatching list

So, Kamailio give me set 1 and set 2 as per post-reindex_dests,
and failover is 192.168.1.144 for set 1, and 192.168.1.146 for set 2.

Is this the expected behavior?
Am I doing something wrong in configuration?

Thank you all in advance,

-giovanni


Sincerely,

Giovanni Maruzzelli
Cell : +39-347-2665618 <tel:%2B39-347-2665618>

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