Kazoo 4.x (Open Source)

w/ Kubernetes fixes & manifests

Maintainer

Joe Black | me@joeblack.nyc | github

Description

Minimal image with kazoo, monster-ui, monster-apps, & kazoo-sounds. This image uses a custom, minimal version of Debian Linux.

Useful links:

• 2600hz Github: https://github.com/2600hz/kazoo
• 4.2.x sup-commands: https://gist.github.com/joeblackwaslike/345b9eb3b81d6033d26aaf1953c0f4fe

Introduction

The aim of this project is combine or experience running Kazoo in docker in a way that lowers the barrier of entry for others.

We target a local docker only environment using docker-compose and a production environment using Kubernetes as the cluster manager. We reccomend the same but effort has been made to ensure this image is flexible and contains enough environment variables to allow significant customization to your needs.

Pull requests with improvements always welcome.

Build Environment

The build environment has been split off from this repo and now lives @ https://github.com/telephoneorg/kazoo-builder. See the README.md file there for more details on the build environment.

The following variables are standard in most of our Dockerfiles to reduce duplication and make scripts reusable among different projects:

• APP: kazoo
• USER: kazoo
• HOME /opt/kazoo

Run Environment

Run environment variables are used in the entrypoint script to render configuration templates, perform flow control, etc. These values can be overridden when inheriting from the base dockerfile, specified during docker run, or in kubernetes manifests in the env array.

• KAZOO_APPS: a comma delimited list used directly by the kazoo_apps erlang vm as the list of default apps to start.
• ERLANG_THREADS: passed to the +A argument in vm.args.
• ERLANG_COOKIE: written to ~/.erlang.cookie by the erlang-cookie script in /usr/local/bin.
• KAZOO_LOG_LEVEL: lowercased and used as the value for the console log level in the log section of config.ini.
• KAZOO_LOG_COLOR: used as the value for the colored tuple in sys.config.
• REGION: interpolated with DATACENTER as such ${COUNTRY}-${REGION} and stored in KAZOO_ZONE. See KAZOO_ZONE.
• COUNTRY: interpolated with REGION as such ${COUNTRY}-${REGION} and stored in KAZOO_ZONE. See KAZOO_ZONE.
• KAZOO_ZONE: when provided, interpolation of COUNTRY and REGION is ignored and the value of KAZOO_ZONE is used directly. This is useful for local test and dev environments where ZONE's don't matter. Used as name in [zone] section and as zone attribute in other sections of config.ini.
• COUCHDB_HOST: the hostname or ip address of the load balancer to reach bigcouch or couchdb through. Used in the bigcouch section of config.ini.
• COUCHDB_DATA_PORT: used as the value for the port key in the bigcouch section of config.ini.
• COUCHDB_ADMIN_PORT: used as the value for the admin_port key in the bigcouch section of config.ini.
• COUCHDB_USER: used as the value for the username key in the bigcouch section of config.ini.
• COUCHDB_PASS: used as the value for the password key in the bigcouch section of config.ini.
• RABBITMQ_USER: interpolated as such "amqp://user:pass@host:5672" and used for all uri keys in the amqp section or the amqp_uri keys in the zone section of config.ini.
• RABBITMQ_PASS: interpolated as such "amqp://user:pass@host:5672" and used for all uri keys in the amqp section or the amqp_uri keys in the zone section of config.ini.
• RABBITMQ_HOST: hostname or ip address, interpolated as such "amqp://{user}:{pass}@{host}:5672", and used in the amqp_uri property of the zone section of config.ini.

Extra tools

In container

There is a binary called kazoo-tool in ~/bin. It contains the useful functions such as remote_console, upgrade, etc found in the original kazoo service file. Since using service files in a docker container is largely a very bad idea, I've extracted the useful functions and adapted them to work in the container environment.

Usage

Under docker

All of our docker-* repos in github have CI pipelines that push to docker cloud/hub.

This image is available at:

• https://store.docker.com/community/images/telephoneorg/kazoo
• https://hub.docker.com/r/telephoneorg/kazoo.
• docker pull telephoneorg/kazoo

To run:

docker run -d \
    --name kazoo \
    -h kazoo.local \
    -e "COUCHDB_HOST=bigcouch.local" \
    -e "RABBITMQ_HOST=rabbitmq.local" \
    -e "KAZOO_LOG_LEVEL=debug" \
    -e "KAZOO_APPS=blackhole,callflow,cdr,conference,crossbar,doodle,ecallmgr,hangups,hotornot,konami,jonny5,media_mgr,milliwatt,omnipresence,pivot,registrar,reorder,stepswitch,sysconf,teletype,trunkstore,webhooks" \
    -e "ERLANG_COOKIE=test-cookie" \
    -p "8000:8000" \
    telephoneorg/kazoo

NOTE: Please reference the Run Environment section for the list of available environment variables.

Under docker-compose

Pull the images

docker-compose pull

Start application and dependencies

# start in foreground
docker-compose up --abort-on-container-exit

# start in background
docker-compose up -d

Under Kubernetes

Edit the manifests under kubernetes/<environment> to reflect your specific environment and configuration.

Create a secret for the erlang cookie:

kubectl create secret generic erlang --from-literal=cookie=$(LC_ALL=C tr -cd '[:alnum:]' < /dev/urandom | head -c 64)

Ensure that:

• Secrets exist for the rabbitmq and couchdb credentials, otherwise supply them directly in the env array of the pod template.
• rabbitmq deployment and couchdb statefulset is running. This container will be paused by the kubewait init-container until it's service dependencies exist and pass readiness-checks.

Deploy kazoo:

kubectl create -f kubernetes/<environment>