Does using Kamailio and the dispatcher module require programming? Is this a matter of reading the documentation and some configuration or does this involve writing a script for handling any SIP dialogue that might come my way? I want to implement this in 3 - 6 months. I don't want to embark on an 18 month research endeavor. On Tue, Apr 19, 2016 at 4:38 PM, <voiceops-request at voiceops.org> wrote:
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Today's Topics:
1. Re: Load balancing SIP (Joseph Jackson) 2. Re: Load balancing SIP (Alex Balashov) 3. Re: Load balancing SIP (Joseph Jackson) 4. Re: Load balancing SIP (Ryan Delgrosso) 5. Re: Load balancing SIP (Alex Balashov)
---------- Forwarded message ---------- From: Joseph Jackson <jjackson at aninetworks.net> To: "Sykes, Aaron" <Aaron.Sykes at cdk.com>, "voiceops at voiceops.org" < voiceops at voiceops.org> Cc: Date: Tue, 19 Apr 2016 23:07:25 +0000 Subject: Re: [VoiceOps] Load balancing SIP
On separate occasions. The brocade load balancers have the option to be ?sticky? ? ie all follow on requests go to the same sbc.
For the brocades they were placed topology wise in front of the SBCs so that all requests and replies cross the load balancer. You can do this by having the load balancer be the default gateway for the SBC?s. It was pretty simple at least for the brocade configuration. Note that RTP traffic was not load balanced of course.
I will see if I can find my notes on the kamailio config. Used the dispatch module if I remember correctly. I will try and find them as its been awhile.
Joseph
*From:* Sykes, Aaron [mailto:Aaron.Sykes at cdk.com] *Sent:* Tuesday, April 19, 2016 6:00 PM *To:* Joseph Jackson; voiceops at voiceops.org *Subject:* RE: Load balancing SIP
Did you use these devices for this purpose on separate occasions or in unison? How many SBCs were being used in the distribution? Can you elaborate on the basic topology?
Aaron
*From:* Joseph Jackson [mailto:jjackson at aninetworks.net <jjackson at aninetworks.net>] *Sent:* Tuesday, April 19, 2016 2:34 PM *To:* Sykes, Aaron <Aaron.Sykes at cdk.com>; voiceops at voiceops.org *Subject:* RE: Load balancing SIP
Ive done it with Brocade and Kamailio.
*From:* VoiceOps [mailto:voiceops-bounces at voiceops.org <voiceops-bounces at voiceops.org>] *On Behalf Of *Sykes, Aaron *Sent:* Tuesday, April 19, 2016 4:32 PM *To:* voiceops at voiceops.org *Subject:* [VoiceOps] Load balancing SIP
Has anyone had any success load balancing SIP? More specifically distributing SIP registrations across a number of access SBCs and maintaining persistence based on source IP. By maintaining source IP persistence subsequent calls would go to the SBC to which they are registered. In this case each of several SBCs cache registrations for a single SIP registrar. Has anyone used F5 or Kamailio for this..or some other SIP proxy or load balancer?
Thank You,
Aaron
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---------- Forwarded message ---------- From: Alex Balashov <abalashov at evaristesys.com> To: voiceops at voiceops.org Cc: Date: Tue, 19 Apr 2016 19:08:59 -0400 Subject: Re: [VoiceOps] Load balancing SIP On 04/19/2016 07:07 PM, Joseph Jackson wrote:
Used the dispatch module if I remember correctly. I will try and find
them as its been awhile.
Yep, dispatcher would be the canonical approach:
http://kamailio.org/docs/modules/4.4.x/modules/dispatcher.html
However, like many Kamailio modules, dispatcher simply provides some logic and database binding. You are free to implement your own (possibly more sophisticated) distribution strategies in Kamailio's elaborate DSL.
-- Alex
-- Alex Balashov | Principal | Evariste Systems LLC 1447 Peachtree Street NE, Suite 700 Atlanta, GA 30309 United States
Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
---------- Forwarded message ---------- From: Joseph Jackson <jjackson at aninetworks.net> To: Alex Balashov <abalashov at evaristesys.com>, "voiceops at voiceops.org" < voiceops at voiceops.org> Cc: Date: Tue, 19 Apr 2016 23:10:14 +0000 Subject: Re: [VoiceOps] Load balancing SIP Alex would for sure know more than me (dude is wicked smart). Also this was a very very small install.
-----Original Message----- From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of Alex Balashov Sent: Tuesday, April 19, 2016 6:09 PM To: voiceops at voiceops.org Subject: Re: [VoiceOps] Load balancing SIP
On 04/19/2016 07:07 PM, Joseph Jackson wrote:
Used the dispatch module if I remember correctly. I will try and find them as its been awhile.
Yep, dispatcher would be the canonical approach:
http://kamailio.org/docs/modules/4.4.x/modules/dispatcher.html
However, like many Kamailio modules, dispatcher simply provides some logic and database binding. You are free to implement your own (possibly more sophisticated) distribution strategies in Kamailio's elaborate DSL.
-- Alex
-- Alex Balashov | Principal | Evariste Systems LLC 1447 Peachtree Street NE, Suite 700 Atlanta, GA 30309 United States
Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
---------- Forwarded message ---------- From: Ryan Delgrosso <ryandelgrosso at gmail.com> To: voiceops at voiceops.org Cc: Date: Tue, 19 Apr 2016 16:37:12 -0700 Subject: Re: [VoiceOps] Load balancing SIP Is there a reason the industry standard of using DNS SRV records wouldnt apply here?
Be aware if this is access side and performing nat traversal you may encounter issues with far end nat devices barking if your response comes from a different IP than the original request went to.
On 4/19/2016 2:32 PM, Sykes, Aaron wrote:
Has anyone had any success load balancing SIP? More specifically distributing SIP registrations across a number of access SBCs and maintaining persistence based on source IP. By maintaining source IP persistence subsequent calls would go to the SBC to which they are registered. In this case each of several SBCs cache registrations for a single SIP registrar. Has anyone used F5 or Kamailio for this..or some other SIP proxy or load balancer?
Thank You,
Aaron
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---------- Forwarded message ---------- From: Alex Balashov <abalashov at evaristesys.com> To: voiceops at voiceops.org Cc: Date: Tue, 19 Apr 2016 19:38:27 -0400 Subject: Re: [VoiceOps] Load balancing SIP On 04/19/2016 07:37 PM, Ryan Delgrosso wrote:
far end nat devices barking if your response comes from a different IP
than the original request went to.
Use of Path would be necessary to deal with this.
-- Alex Balashov | Principal | Evariste Systems LLC 1447 Peachtree Street NE, Suite 700 Atlanta, GA 30309 United States
Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
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On 04/19/2016 07:51 PM, Jared Ball wrote:
Does using Kamailio and the dispatcher module require programming? Is this a matter of reading the documentation and some configuration or does this involve writing a script for handling any SIP dialogue that might come my way? I want to implement this in 3 - 6 months. I don't want to embark on an 18 month research endeavor.
Kamailio does have the problem of being relatively low-level. It can almost be thought of as a kind of SDK with a SIP proxy service core, and its behaviour is configured with a domain-specific language that corresponds to the SIP transactional state machine. It's not declarative and doesn't do much of anything useful out of the box. So, yes, it requires some programming, and yes, your route script needs to be reasonably comprehensive in the SIP scenarios it can handle. Having said that, you don't need an eighteen-month research endeavour to implement a load balancer using the dispatcher module, even as a novice: - The stock configuration that's packaged with Kamailio goes a long way toward providing "minimally viable handling" for all canonical SIP scenarios (e.g. loose-routed in-dialog requests, and even NAT traversal) if you lean toward modifying a stock config. - There's lots of examples online about how to implement a load balancer with dispatcher, since it's done so commonly. - You can get help on the mailing list. The community is very helpful: http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users - You can always hire a consultant to do this for you. A basic load balancer using dispatcher is not a big or expensive job. https://www.kamailio.org/w/business-directory/ -- Alex -- Alex Balashov | Principal | Evariste Systems LLC 1447 Peachtree Street NE, Suite 700 Atlanta, GA 30309 United States Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
On 20/04/16 01:51, Jared Ball wrote:
Does using Kamailio and the dispatcher module require programming? Is this a matter of reading the documentation and some configuration or does this involve writing a script for handling any SIP dialogue that might come my way? I want to implement this in 3 - 6 months. I don't want to embark on an 18 month research endeavor.
Alex gave already good pointers on his replies, I just want to add that the dispatcher module has in its documentation a fairly complete configuration file for load balancing SIP calls: - http://www.kamailio.org/docs/modules/stable/modules/dispatcher.html#dispatch... You will eventually need to add authentication/authorization, which can be extracted from default kamailio.cfg -- look for the module auth, auth_db and/or permissions, together with route[AUTH]. Or you can track the WITH_MYSQL, WITH_AUTH and WITH_IPAUTH inside the default kamailio.cfg. For convenience, here is the link to the git repo of default kamailio.cfg: - https://github.com/kamailio/kamailio/blob/master/etc/kamailio.cfg Then it is about adding records to db tables dispatcher for load balancing routes and subscriber/address for user/ip auth. Cheers, Daniel -- Daniel-Constantin Mierla http://www.asipto.com http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda Kamailio World Conference, Berlin, May 18-20, 2016 - http://www.kamailioworld.com
participants (3)
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abalashov＠evaristesys.com -
jaredball1＠gmail.com -
miconda＠gmail.com