rroemhild/ejabberd

• Introduction
  • Version
• Quick Start
• Usage
  • Persistence
  • SSL Certificates
  • Base Image
  • Run as root
  • Cluster Example
• Runtime Configuration
  • Served Hostnames
  • Authentication
  • Admins
  • Users
  • SSL
  • Erlang
  • Modules
  • Logging
• Maintenance
  • Register Users
  • Creating Backups
  • Restoring Backups
• Debug
  • Erlang Shell
  • System Shell
  • System Commands
• Exposed Ports

Introduction

Dockerfile to build an ejabberd container image.

Version

Current Version: 15.11

Docker Tag Names are based on ejabberd versions in git branches and tags. The image tag :latest is based on the master branch.

Quick Start

You can start of with the following container:

docker run -d \
    --name "ejabberd" \
    -p 5222:5222 \
    -p 5269:5269 \
    -p 5280:5280 \
    -h 'xmpp.example.de' \
    -e "XMPP_DOMAIN=example.de" \
    -e "ERLANG_NODE=ejabberd" \
    -e "EJABBERD_ADMINS=admin@example.de admin2@example.de" \
    -e "EJABBERD_USERS=admin@example.de:password1234 admin2@example.de" \
    -e "TZ=Europe/Berlin" \
    rroemhild/ejabberd

or with the docker-compose example

wget https://raw.githubusercontent.com/rroemhild/docker-ejabberd/master/examples/docker-compose/docker-compose.yml
docker-compose up

Usage

Persistence

For storage of the application data, you can mount volumes at

• /opt/ejabberd/ssl
• /opt/ejabberd/backup
• /opt/ejabberd/upload
• /opt/ejabberd/database

or use a data container

docker create --name ejabberd-data rroemhild/ejabberd-data
docker run -d --name ejabberd --volumes-from ejabberd-data rroemhild/ejabberd

SSL Certificates

TLS is enabled by default and the run script will auto-generate two snake-oil certificates during boot if you don't provide your SSL certificates.

To use your own certificates, there are two options.

1. Mount the volume /opt/ejabberd/ssl to a local directory with the .pem files:

• /tmp/ssl/host.pem (SERVER_HOSTNAME)
• /tmp/ssl/xmpp_domain.pem (XMPP_DOMAIN)

Make sure that the certificate and private key are in one .pem file. If one file is missing it will be auto-generated. I.e. you can provide your certificate for your XMMP_DOMAIN and use a snake-oil certificate for the SERVER_HOSTNAME.

2. Specify the certificates via environment variables: SSLCERT_HOST and SSLCERT_EXAMPLE_COM. For the domain certificates, make sure you match the domain names given in XMPP_DOMAIN.

Base Image

Build your own ejabberd container image and add your config templates, certificates or extend it for your needs.

FROM rroemhild/ejabberd
ADD ./ejabberd.yml.tpl /opt/ejabberd/conf/ejabberd.yml.tpl
ADD ./ejabberdctl.cfg.tpl /opt/ejabberd/conf/ejabberdctl.cfg.tpl
ADD ./example.com.pem /opt/ejabberd/ssl/example.com.pem

If you need root privileges switch to USER root and go back to USER ejabberd when you're done.

Run as root

By default ejabberd runs as user ejabberd(999). To run ejabberd as root add the -u root argument to docker run.

docker run -d -u root -P rroemhild/ejabberd

Cluster Example

The docker-compose-cluster example demonstrates how to extend this container image to setup a multi-master cluster.

Runtime Configuration

You can additionally provide extra runtime configuration in a downstream image by replacing the config template ejabberd.yml.tpl with one based on this image's template and include extra interpolation of environment variables. The template is parsed by Jinja2 with the runtime environment (equivalent to Python's os.environ available as env).

Served Hostnames

By default the container will serve the XMPP domain localhost. In order to serve a different domain at runtime, provide the XMPP_DOMAIN variable with a domain name. You can add more domains separated with whitespace.

XMPP_DOMAIN=example.ninja xyz.io test.com

Authentication

Authentication methods can be set with the EJABBERD_AUTH_METHOD environment variable. The default authentication mode is internal.

Supported authentication methods:

• anonymous
• internal

Internal and anonymous authentication:

AUTH_METHOD=internal anonymous

Admins

Set one or more admin user (seperated by whitespace) with the EJABBERD_ADMINS environment variable. You can register admin users with the EJABBERD_USERS environment variable during container startup, use you favorite XMPP client or the ejabberdctl command line utility.

EJABBERD_ADMINS=admin@example.ninja

Users

Automatically register users during container startup. Uses random password if you don't provide a password for the user. Format is JID:PASSWORD. Register more users separated with whitespace.

Register the admin user from EJABBERD_ADMINS with a give password:

EJABBERD_USERS=admin@example.ninja:password1234

Or without a random password printed to stdout (check container logs):

EJABBERD_USERS=admin@example.ninja

Register more than one user:

EJABBERD_USERS=admin@example.ninja:password1234 user1@test.com user1@xyz.io

SSL

• EJABBERD_SSLCERT_HOST: SSL Certificate for the hostname.
• EJABBERD_SSLCERT_EXAMPLE_COM: SSL Certificates for XMPP domains.
• EJABBERD_STARTTLS: Set to false to disable StartTLS for client to server connections. Defaults to true.
• EJABBERD_S2S_SSL: Set to false to disable SSL in server 2 server connections. Defaults to true.
• EJABBERD_HTTPS: If your proxy terminates SSL you may want to disable HTTPS on port 5280 and 5443. Defaults to true.
• EJABBERD_PROTOCOL_OPTIONS_TLSV1: Allow TLSv1 protocol. Defaults to false.

Erlang

• ERLANG_NODE: Allows to explicitly specify erlang node for ejabberd. Set to ejabberd lets erlang add the hostname. Defaults to ejabberd@localhost.
• ERLANG_COOKIE: Set erlang cookie. Defaults to auto-generated cookie.
• ERLANG_OPTIONS: Overwrite additional options passed to erlang while starting ejabberd.

Modules

• EJABBERD_SKIP_MODULES_UPDATE: If you do not need to update ejabberd modules specs, skip the update task and speedup start. Defaults to false.
• EJABBERD_MOD_MUC_ADMIN: Activate the mod_muc_admin module. Defaults to false.
• EJABBERD_MOD_ADMIN_EXTRA: Activate the mod_muc_admin module. Defaults to true.
• EJABBERD_REGISTER_TRUSTED_NETWORK_ONLY: Only allow user registration from the trusted_network access rule. Defaults to true.

Logging

Use the EJABBERD_LOGLEVEL environment variable to set verbosity. Defaults to 4 (Info).

loglevel: Verbosity of log files generated by ejabberd.
0: No ejabberd log at all (not recommended)
1: Critical
2: Error
3: Warning
4: Info
5: Debug

Maintenance

The ejabberdctl command is in the search path and can be run by:

docker exec CONTAINER ejabberdctl help

Register Users

docker exec CONTAINER ejabberdctl register user XMPP_DOMAIN PASSWORD

Creating Backups

Create a backupfile with ejabberdctl and copy the file from the container to localhost

docker exec CONTAINER ejabberdctl backup /opt/ejabberd/backup/ejabberd.backup
docker cp CONTAINER:/opt/ejabberd/backup/ejabberd.backup /tmp/ejabberd.backup

Restoring Backups

Copy the backupfile from localhost to the running container and restore with ejabberdctl

docker cp /tmp/ejabberd.backup CONTAINER:/opt/ejabberd/backup/ejabberd.backup
docker exec CONTAINER ejabberdctl restore /opt/ejabberd/backup/ejabberd.backup

Debug

Erlang Shell

Set -i and -t option and append live to get an interactive erlang shell:

docker run -i -t -P rroemhild/ejabberd live

You can terminate the erlang shell with q()..

System Shell

docker run -i -t rroemhild/ejabberd shell

System Commands

docker run -i -t rroemhild/ejabberd env

Exposed Ports

• 4560 (XMLRPC)
• 5222 (Client 2 Server)
• 5269 (Server 2 Server)
• 5280 (HTTP admin/websocket/http-bind)
• 5443 (HTTP Upload)