Tuesday, June 18, 2019

Development Update on the Unofficial OTRS docker images

Lately there have been some work with the unofficial OTRS docker images with the help of some new contributors. I have added some improvements and some new Pull Requests have been merged (thanks for those !). I'm going to review the latest updates done to the images:

OTRS container

Docker secrets support

Merged PR #60 that adds support for docker swarm secrets, allowing to use files to store variable values instead of adding them as environment variables when in a docker swarm cluster.

Email sending configuration is more flexible

Merged PR #64 that makes OTRS SMTP settings completely configurable. Now these settings aren't hardcoded to use this SMTP relay container to send emails (It is still added in the example .env file as an example if you plan to use it). 

Now addtional to the SMTP server, port, username and password values, you can also set the email module to use, using the variable OTRS_SENDMAIL_MODULE=(SMTP, SMPTS, Sendmail) to one of the supported values by OTRS.

The reason why we are not setting a default anymore for this settings is because any setting set on Config.pm becomes read-only on the SysConfig GUI, and some people like using SysConfig instead of modifying configuration files.

So now if you don't manually configure the SMTP settings, email sending will not work until you configure an SMTP server through SysConfig.

Major updates improved

 There also have been some improvements in the major version upgrade process: part of the code was reorganized to avoid some rare upgrade cases I was facing, now addons are upgraded before running the database upgrade script.

Also some new variables were added to improve the control during the upgrade:
  • New environment variable OTRS_UPGRADE_BACKUP=(yes|no) to enable/disable automatic backup before starting a major version upgrade. Default is yes. 
  • Load additional sql files before db upgrade.
  • Added new environment variable OTRS_UPGRADE_XML_FILES=(yes|no) to enable upgrading of XML configuration files during an major version upgrade.

Some more general changes

  • Another new feature is that addons can be installed at container start. Just map  /opt/otrs/addons to a directory in your host, download the addons from whatever repository you like and put the .opm files there. The container will pick them up on boot and install them (and automatically upgraded when a new version of OTRS is released).
  • Also now all pasword values that are printed into stdout are masked by default so they aren't displayed on container boot.
  • Merged PR #57 that adds a new variable MYSQL_ROOT_USER to configure the database root username that was hardcoded to root before.
  • Merged PR #66 that adds an example systemd service file to run the containers using docker-compose at server boot.

Database container

For a long time there was an issue with the database container when starting a new OTRS  service. The container expected the user owner of the database mount point to be the same as the user running the database process, so you had to manually set the correct permissions first on the docker host prior to starting it.

Now that's not needed to be done, the container will work without the need to set up filesystem permissions. We also moved from CentOS/MariaDB image to the official MariaDB image.

That's all for now, check the complete CHANGELOG for the complete list of changes done.

Monday, May 20, 2019

New docker images for upcoming mageia 7

I have added new docker images for the upcoming mageia 7 release. Thanks to the latest work on our image build tools, the images are available in all architectures mageia 7 supports:
  • x86_64
  • armv7hl
  • aarch64
The images are based on mageia 7 beta3, and will be periodically updated when new releases are available.

Next step, automation.

Friday, May 10, 2019

armv7hl support for mageia docker official images

After some months of on and off work with @Conan-Kudo on improving mageia's docker images build tools to support multi-arch builds, we finally were able to add armv7hl support to mageia 6.

Usage is completely transparent to the user, when pulling the image, the docker daemon will take care to download the correct image according to the host server architecture.

Also, now that our build tools support multiarch builds, the moment mageia 7 is available armv8 images will be available too, at the same time of the x86_64 image.

We are also working on having a periodically updated cauldron build, but we are still working on that. With the latest changes to the build tools it should be easier to automate a cauldron build for example, a weekly or daily.

Sunday, March 17, 2019

Some improvements on my docker simple SMTP relay

I have not done any improvements to one of my first docker containers, a SMTP relay, despite the fact that it has resulted quite popular on docker hub (a 1M+ downloads to date !!). Lately I have done some work and received some pull requests with some improvements that I want to talk about.

The first feature I want to introduce is the addition of rsyslog to enable logging the container output to stdout and to log to remote logging systems. This means that now you can see the logs of the emails being processed by the container on its standard output with the docker logs command.

Also, for the modification of postfix's config file, now instead of using sed to modify it we use the postconf command so it is safer. There are also some new configuration options:


Added by PR #4. Adds a new variable to configure the server SMTP port to use.


Added by PR #7. This will add a header for tracking messages upstream. Helpful for spam filters. It will appear as:
RelayTag: yourheadertag

in the email headers.

Added by PR #12 . This variable will set postfix parameter mynetworks, allowoing you to add additional, comma seperated, subnets to use the relay. The default value allows the following networks:


The value you set will append the entered values to that list, so no need to re-add them to the variable.

Many thanks to all the authors for them !!