modules_update_specs does not always succeed about docker-ejabberd

[rroemhild]

This hopefully was fixed with 21bac1d. Did you test this with the latest image from docker index or build by yourself?

[rhalukongor]

I've been using the image from docker index; will try building myself. Thanks a lot for the info.

[rroemhild]

You're welcome. This should also work with the latest rroemhild/ejabberd:latest build from docker index.

[rhalukongor]

Off topic: Which is the best place install modules.
I've tried pre install script; fails with erlang nodedown because ejabberd is not started yet.
Any other option involving ejabberdctl restart is out of question since docker container would quit.
This is coming from someone with no erlang experience at all :)

[rroemhild]

Modules get installed in /opt/ejabberd/.ejabberd-modules. To automate module installation you have to run one or more post scripts after module update spec i.e. 40_install_modules.sh

#!/bin/bash
set -e

source "${EJABBERD_HOME}/scripts/lib/base_config.sh"
source "${EJABBERD_HOME}/scripts/lib/config.sh"
source "${EJABBERD_HOME}/scripts/lib/base_functions.sh"
source "${EJABBERD_HOME}/scripts/lib/functions.sh"

${EJABBERDCTL} module_install mod_admin_extra

You can test this inside a running container:

$ docker exec -it <containerid> ejabberdctl modules_available
$ docker exec -it <containerid> ejabberdctl module_install mod_admin_extra

[rhalukongor]

I beileve the way you've suggested requires an ejabberdctl restart which causes container to exit. Tried your suggestion + uncommenting (initially commented out) sections related to modules installed via sed and reload_config instead of restart; also doesn't work. I was thinking of VOLUME'ing yml file, so it stays intact after a restart however I can't imagine a production scenario if I do that. Any suggestions?

[rhalukongor]

Sorry to bug you up until now. It all boils down to Ejabberd and its -not so ready for docker- module system. A relevant discussion is here: processone/ejabberd#487 for anyone stops by.