Strange behaviour on Addon Installation on multiple (docker) instances

Question

Hi,
I discovered a strange behaviour today when I installed a native Odoo Addon on my Odoo installation.
My Setup:
I run 3 Odoo instances via Docker. Each of them on a different port. I have a load balancer that chooses one of these 3 containers. Works perfectly ... BUT when I install an addon I get strange errors. In the end the addons cannot be installed.
When I turn off the load balancer and reduce the instances to only one, I can install the addon when I connect directly on the docker contai

Michael Mugge · Answer

How did you install the addon? If you installed it from inside the app and did not mount a common volume for "extra-addons" then the addon is only downloaded to the container where the installation was triggered. If however, you have all containers pointing to the one common folder on the host for a common extra-addons, then the downloaded module is available for all containers. Or you could just used Dockers new named volume feature.

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