jambonz-feature-server

This application implements the core feature server of the jambones platform.

Note: If you are a developer looking to work on the code please read our how-to for that.

Configuration

Configuration is provided via environment variables:

variable	meaning	required?
AWS_ACCESS_KEY_ID	aws access key id, used for TTS/STT as well SNS notifications	no
AWS_REGION	aws region	no
AWS_SECRET_ACCESS_KEY	aws secret access key, used per above	no
AWS_SNS_TOPIC_ARN	aws sns topic arn that scale-in lifecycle notifications will be published to	no
DRACHTIO_HOST	ip address of drachtio server (typically '127.0.0.1')	yes
DRACHTIO_PORT	listening port of drachtio server for control connections (typically 9022)	yes
DRACHTIO_SECRET	shared secret	yes
ENABLE_METRICS	if 1, metrics will be generated	no
ENCRYPTION_SECRET	secret for credential encryption(JWT_SECRET is deprecated)	yes
GOOGLE_APPLICATION_CREDENTIALS	path to gcp service key file	yes
HTTP_PORT	tcp port to listen on for API requests from jambonz-api-server	yes
HTTP_IP	IP Address for API requests from jambonz-api-server	no
JAMBONES_GATHER_EARLY_HINTS_MATCH	if true and hints are provided, gather will opportunistically review interim transcripts if possible to reduce ASR latency	no
JAMBONES_FREESWITCH	IP:port:secret for Freeswitch server (e.g. '127.0.0.1:8021:JambonzR0ck$'	yes
JAMBONES_LOGLEVEL	log level for application, 'info' or 'debug'	no
JAMBONES_MYSQL_HOST	mysql host	yes
JAMBONES_MYSQL_USER	mysql username	yes
JAMBONES_MYSQL_PASSWORD	mysql password	yes
JAMBONES_MYSQL_DATABASE	mysql data	yes
JAMBONES_MYSQL_CONNECTION_LIMIT	mysql connection limit	no
JAMBONES_NETWORK_CIDR	CIDR of private network that feature server is running in (e.g. '172.31.0.0/16')	yes
JAMBONES_REDIS_HOST	redis host	yes
JAMBONES_REDIS_PORT	redis port	yes
JAMBONES_SBCS	list of IP addresses (on the internal network) of SBCs, comma-separated	yes
STATS_HOST	ip address of metrics host (usually '127.0.0.1' since telegraf is installed locally	no
STATS_PORT	listening port for metrics host	no
STATS_PROTOCOL	'tcp' or 'udp'	no
STATS_TELEGRAF	if 1, metrics will be generated in telegraf format	no
JAMBONZ_RECORD_WS_BASE_URL	recording websocket URL to send the recording audio	no
JAMBONZ_RECORD_WS_USERNAME	recording websocket username	no
JAMBONZ_RECORD_WS_PASSWORD	recording websocket password	no
ANCHOR_MEDIA_ALWAYS	keep media on media server	no
JAMBONZ_DISABLE_DIAL_PAI_HEADER	control P-Asserted-Identity header on B-Leg	no

running under pm2

Typically, this application runs under pm2 using an ecosystem.config.js file similar to this:

module.exports = {
  apps : [
  {
    name: 'jambonz-feature-server',
    cwd: '/home/admin/apps/jambonz-feature-server',
    script: 'app.js',
    instance_var: 'INSTANCE_ID',
    out_file: '/home/admin/.pm2/logs/jambonz-feature-server.log',
    err_file: '/home/admin/.pm2/logs/jambonz-feature-server.log',
    exec_mode: 'fork',
    instances: 1,
    autorestart: true,
    watch: false,
    max_memory_restart: '1G',
    env: {
      NODE_ENV: 'production',
      GOOGLE_APPLICATION_CREDENTIALS: '/home/admin/credentials/gcp.json',
      AWS_ACCESS_KEY_ID: 'XXXXXXXXXXXX',
      AWS_SECRET_ACCESS_KEY: 'YYYYYYYYYYYYYYYYYYYYY',
      AWS_REGION: 'us-west-1',
      ENABLE_METRICS: 1,
      STATS_HOST: '127.0.0.1',
      STATS_PORT: 8125,
      STATS_PROTOCOL: 'tcp',
      STATS_TELEGRAF: 1,
      AWS_SNS_TOPIC_ARN: 'arn:aws:sns:us-west-1:xxxxxxxxxxx:terraform-20201107200347128600000002',
      JAMBONES_NETWORK_CIDR: '172.31.0.0/16',
      JAMBONES_MYSQL_HOST: 'aurora-cluster-jambonz.cluster-yyyyyyyyyyy.us-west-1.rds.amazonaws.com',
      JAMBONES_MYSQL_USER: 'admin',
      JAMBONES_MYSQL_PASSWORD: 'foobarbz',
      JAMBONES_MYSQL_DATABASE: 'jambones',
      JAMBONES_MYSQL_CONNECTION_LIMIT: 10,
      JAMBONES_REDIS_HOST: 'jambonz.zzzzzzz.0001.usw1.cache.amazonaws.com',
      JAMBONES_REDIS_PORT: 6379,
      JAMBONES_LOGLEVEL: 'debug',
      HTTP_PORT: 3000,
      DRACHTIO_HOST: '127.0.0.1',
      DRACHTIO_PORT: 9022,
      DRACHTIO_SECRET: 'sharedsecret',
      JAMBONES_SBCS: '172.31.32.10',
      JAMBONES_FREESWITCH: '127.0.0.1:8021:sharedsecret'
    }
  }]
};

Running the test suite

Please see this.