SOGo for Docker

SOGo is fully supported and trusted groupware server with a focus on scalability and open standards. SOGo is released under the GNU GPL/LGPL v2 and above.

This Dockerfile packages SOGo as packaged by Inverse, SOGo's creators, together with Apache 2 and memcached.

Setup

The image stores configuration, logs and backups in /srv, which you should persist somewhere. Example configuration is copied during each startup of the container, which you can adjust for your own use. For creating the initial directory hierarchy and example configuration, simply run the container with the /srv volume already exposed or linked, for example using

docker run -v /srv/sogo:/srv jenserat/sogo

As soon as the files are created, stop the image again. You will now find following files:

.
├── etc
│   ├── apache-SOGo.conf.orig
│   └── sogo.conf.orig
└── lib
    └── sogo
        └── GNUstep
            ├── Defaults
            └── Library

Create copies of the configuration files named apache-SOGo.conf and sogo.conf.orig. Don't change or link the .orig files, as they will be overwritten each time the container is started. They can also be used to see differences on your configuration after SOGo upgrades.

Database

A separate database is required, for example a PostgreSQL container as provided by the Docker image paintedfox/postgresql, but also any other database management system SOGo supports can be used. Follow the Database Configuration chapter of the SOGo documentation on these steps, and modify the sogo.conf` file accordingly. The following documentation will expect the database to be available with the SOGo default credentials given by the official documentation, adjust them as needed. If you link a database container, remember that it will be automatically added to the hosts file and be available under the chosen name.

For a container named sogo-postgresql linked as db using --link="sogo-postgresql:db" with default credentials, you would use following lines in the sogo.conf:

SOGoProfileURL = "postgresql://sogo:sogo@db:5432/sogo/sogo_user_profile";
OCSFolderInfoURL = "postgresql://sogo:sogo@db:5432/sogo/sogo_folder_info";
OCSSessionsFolderURL = "postgresql://sogo:sogo@db:5432/sogo/sogo_sessions_folder";

SOGo performs schema initialziation lazily on startup, thus no database initialization scripts must be run.

Sending Mail

For convenience reasons, the gateway is added to the hostsfile as host GATEWAY before starting the SOGo daemon. This enables you to use a local MTA in the host machine to forward mail using

SOGoMailingMechanism = "smtp";
SOGoSMTPServer = "GATEWAY";

For further details in MTA configuration including SMTP auth, refer to SOGo's documentation.

Apache and HTTPs

As already given above, the default Apache configuration is already available under etc/apache-SOGo.conf.orig. The container exposes HTTP (80), HTTPS (443) and 8800, which is used by Apple devices, and 20000, the default port the SOGo daemon listens on. You can either directly include the certificates within the container, or use an external proxy for this. Make sure to only map the required ports to not unnecessarily expose daemons.

You need to adjust the <Proxy ...> section and include port, server name and url to match your setup.

<Proxy http://127.0.0.1:20000/SOGo>
## adjust the following to your configuration
  RequestHeader set "x-webobjects-server-port" "443"
  RequestHeader set "x-webobjects-server-name" "sogo.example.net"
  RequestHeader set "x-webobjects-server-url" "https://sogo.example.net"

If you want to support iOS-devices, add appropriate .well-known-rewrites in either the Apache configuration or an external proxy.

Cron-Jobs: Backup, Session Timeout, Sieve

SOGo heavily relies on cron jobs for different purposes. The image provides SOGo's original cron file as ./etc/cron.orig. Copy and edit it as ./etc/cron. The backup script is available and made executable at the predefined location /usr/share/doc/sogo/sogo-backup.sh, so backup is fully functional immediately after uncommenting the respective cron job.

Further Configuration

Unlike the Debian and probably other SOGo packages, the number of worker processes is not set in /etc/default/sogo, but the normal sogo.conf. Remember to start a reasonable number of worker processes matching to your needs (8 will not be enough for medium and larger instances):

WOWorkerCount = 8;

All other configuration options have no special considerations.

Running a Container

Run the image in a container, expose ports as needed and making /srv permanent. An example run command, which links to a database container named db and uses an external HTTP proxy for wrapping in HTTPS might be

docker run -d \
  --name='sogo' \
  --publish='127.0.0.1:80:80' \
  --link='sogo-postgresql:db' \
  --volume='/srv/sogo:/srv' \
  jenserat/sogo

Upgrading and Maintenance

Most of the time, no special action must be performed for upgrading SOGo. Read the Upgrading section of the Installation Manual prior upgrading the container to verify whether anything special needs to be considered.

As the image builds on phusion/baseimage, you can get a shell for running update scripts when necessary or perform similar maintenance operations by adding /sbin/my_init -- /bin/bash as run command and subsequently attaching to the container:

docker run -t -i -d \
  --name='sogo' \
  --publish='127.0.0.1:80:80' \
  --link='sogo-postgresql:db' \
  --volume='/srv/sogo:/srv' \
  jenserat/sogo /sbin/my_init -- /bin/bash

This is fine for running update scripts on the database. To be able to perform persistent changes to the file system (without creating new containers), red the phusion/baseimage documentation on attaching to the container.