30 Jun
2016
30 Jun
'16
6:43 p.m.
Thank you Giacomo for the info!
We are thinking to use DNS SRV for failover and to use multiple LBs and do
some sort of HA on the Load Balancer(s) using keepalived or etcd, etc....
One of my marching orders is to eliminate any single point of failures.
Using one set of hosts would definitely simplify my architecture. Are there
any security concerns that arise when allowing the LB/Proxy/Registrar/GW to
be on the same device and connected to the Public Internet?
*Daryn Johnson*
*Senior VoIP Engineer*
248.485.1109
*www.telnetww.com* <http://www.telnetww.com>
1175 W. Long Lake Rd. | Suite 101 | Troy, MI 48098
On Thu, Jun 30, 2016 at 11:15 AM, Giacomo Vacca <giacomo.vacca(a)gmail.com>
wrote:
Hi Daryn,
it may not be an overkill, depending on the constrains you have. For
example if the clients can possibly only be instructed to connect to a
single public IP address (5.5.5.5 in your example), while you want to be
able to scale the Kamailio architecture with multiple instances, then it
can be a viable approach. Remember though that the Load Balancer will be
your Single Point Of Failure. If the Load Balancer dies, for any reason,
the service is not available.
There has been an interesting thread in this mailing list recently, on
techniques to provide active/stand-by redundancy to a Kamailio deployment:
"High Availability".
Depending on the capabilities of the clients you may consider removing the
Load Balancer from the equation and perform DNS-based load balancing across
your Proxy/Registrar/PSTN Gw instances. You'd be removing a SPOF, use one
fewer machine, and simplify the architecture. This is not always possible
to achieve though, because it delegates load balancing and fail over to the
clients.
Giacomo
On 30 June 2016 at 17:03, Daryn Johnson <djohnson(a)telnetww.com> wrote:
I am interested in opinions and suggestions about
load balancing with
Kamailio. I work for an ITSP that currently uses Oracle & Broadsoft, and I
am working to design and develop an open source solution using Kamailio
(Proxy, Registrar, LB) & other Application/Media servers for more
flexibility and freedom :) Thank you ALL for the work you have put in on
Kamailio!
After much reading and configuration I have a Kamailio 'proxy' setup,
with endpoints registered using the Registrar module, and calls being
sent/received to/from the PSTN. I am interested in separating the Load
Balancers from the Registrars & logic, for security and in order to be able
to scale appropriately. I will be using the dispatcher module for both
load balancers and proxies using the following architecture:
PublicIP = 5.5.5.5; Private IP = 192.168.1.0/24
USERS (Public Internet) ==> (public: 5.5.5.5) [ Kamailio (LoadBalancer,
Firewall, Sanity Checks) ] (core:192.168.1.2) ==> [ Kamailio Registrar,
Proxy, PSTN GW ] ==> AppServers or PSTN GW
(we can access our PSTN gateways Via our Core using Private IPs)
Questions:
1) Is it overkill to separate the LB & Proxy/Registrars?
2) Is this a common architecture & anyone configured this architecture
successfully?
Thanks in advance for your help!
*Daryn Johnson*
*Senior VoIP Engineer*
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