fs-registrator

FreeSWITCH Sofia-SIP Registry Bridge (Sync to Key/Value Store)

Summary

When run and pointed at a FreeSWITCH instance, will take note of all Sofia-SIP registrations, and propagate them to a (replicated) K/V store for lookups.

Useful for discovering which SIP registrations reside on which server/s.

We use ESL events + a semi-regular sync for reconciliation (to gracefully handle restarts and/or missed events).

Supported K/V Stores

Currently the focus is on etcd, with the intention to support others in future. Consul and redis would be the most likely next targets (both support prefix-based wildcard lookups and TTLs for the most part).

New K/V store backends can be added, see kv_etcd.go for an example implementation. As long as you satisfy the KvBackend interface and register the backend, it will be available.

Configuration

Configuration is performed via CLI arguments, and self documenting using --help:

NAME:
   fs-registrator - FreeSWITCH Sofia-SIP Registry Bridge (Sync to Key/Value Store)

USAGE:
   fs-registrator [global options] command [command options] [arguments...]

VERSION:
   0.1.0

COMMANDS:
     help, h  Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --fshost value           FreeSWITCH ESL Hostname/IP (default: "localhost")
   --fsport value           FreeSWITCH ESL Port (default: 8021)
   --fspassword value       FreeSWITCH ESL Password (default: "ClueCon")
   --fsprofiles value       List of Sofia Profiles to watch (comma separated list) (default: "internal")
   --fsadvertiseip value    SIP Destination IP to store in K/V Store for FreeSWITCH
   --fsadvertiseport value  SIP Destination Port to store in K/V Store for FreeSWITCH
   --kvbackend value        Key/Value Backend (one of: etcd) (default: "etcd")
   --kvhost value           Key/Value Store Hostname/IP (default: "etcd")
   --kvport value           Key/Value Store Port (default: 2379)
   --kvprefix value         Key Space Prefix in K/V Store to store Registrations (default: "fs_registrations")
   --syncinterval value     Interval (in seconds) between full sync. A full sync is performed on initial startup also. (default: 3600)
   --help, -h               show help
   --version, -v            print the version

Building

go get -d && go build should produce a single executable. Binary releases are also available here

Running Tests

You'll need to add sip.testserver.tld to your /etc/hosts file, to workaround sipsak wanting a resolveable hostname for some tests. For background, see this mailing list post. Something like the below is fine in /etc/hosts:

127.0.0.1   sip.testserver.tld

Also, some of the tests rely on Docker containers to provide a real FreeSWITCH/etcd instances. Ensure you have Docker + Docker Compose installed, then run:

docker-compose pull
go test