ns8-nethvoice-proxy

NS8 NethVoice proxy module, a SIP and RTP proxy allows multiple instances of NethVoice to be hosted on the same Node. The proxy uses Kamailio and rtpengine as core components.

Module overview

flowchart LR
subgraph Host Network
    subgraph Proxy[NethVoice Proxy Module]
        Kamailio
        RTPengine
    end
    subgraph NethVoice1[NethVoice Module 1]
        Kamailio -- Custom sip ports --> Asterisk1[Asterisk]
        RTPengine -- Custom port range -->Asterisk1[Asterisk]
    end
    subgraph NethVoiceN[NethVoice Module N]
        Kamailio -- Custom sip ports --> AsteriskN[Asterisk]
        RTPengine -- Custom port range -->AsteriskN[Asterisk]
    end
    NethVoice1 -.. N instance of NethVoice Module ..- NethVoiceN
end
sip>SIP Connections]-- Standard SIP ports --> Kamailio
rtp>RTP Flows]-- 10000-20000 --> RTPengine

Install

Instantiate the module with:

add-module ghcr.io/nethesis/nethvoice-proxy:latest 1

The output of the command will return the instance name. Output example:

{"module_id": "nethvoice-proxy1", "image_name": "nethvoice-proxy", "image_url": "ghcr.io/nethesis/nethvoice-proxy:latest"}

Configure

Let's assume that the nethvoice-proxy instance is named nethvoice-proxy1.

Launch configure-module, by setting the following parameters:

• fqdn: name of Let's Encrypt certificate to use for Secure SIP connections, the phones must be configured to use this domain name as server SIP.
• addresses: configure the IP where the proxy will receive SIP and RTP connections/streams.
  • address: IPv4 address that is expected to receive VoIP traffic, mandatory.
  • public_address: public IPV4 address that is expected to receive VoIP traffic, in case of NAT.

Example:

api-cli run module/nethvoice-proxy1/configure-module --data '{"fqdn": "example.com", "addresses": { "address": "192.168.1.1", "public_address": "1.2.3.4" }}'

Uninstall

To uninstall the instance:

remove-module --no-preserve nethvoice-proxy1

Testing

Test the module using the test-module.sh script:

./test-module.sh <NODE_ADDR> ghcr.io/nethesis/nethvoice-proxy:latest

The tests are made using Robot Framework

Components

Kamailio

Kamailio® (successor of former OpenSER and SER) is an Open Source SIP Server released under GPLv2+, able to handle thousands of call setups per second. Website: kamailio

Postgres

PostgreSQL is a powerful, open source object-relational database system with over 35 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance. Website: postgresql

Redis

The open source, in-memory data store used by millions of developers as a database, cache, streaming engine, and message broker. Website: redis

RTPengine

The Sipwise NGCP rtpengine is a proxy for RTP traffic and other UDP based media traffic. It's meant to be used with the Kamailio SIP proxy and forms a drop-in replacement for any of the other available RTP and media proxies. Website: RTPengine

How to run locally

1. Compile the .env

   cp .env.template .env

   Edit the .env file and set the correct values

2. Build the docker image and run it

   cd modules/postgres
   make build
   make run && make log
   
   cd modules/redis
   make build
   make run && make log
   
   cd modules/rtpengine
   make build
   make run && make log
   
   cd modules/kamailio
   make build
   make run && make log

How to run remotely (DEV or PROD Virtual Machine)

1. Copy in the remote server the Makefile

2. Run the init stage to creation of ENV file and needed folder (only first time)

   make init

3. Run all the pods

   make run-all