When recently running ./launcher rebuild app, two Docker images were scheduled to download. One of them took a while, but another is taking a very long time (> 20 minutes). Our vm has plenty of bandwidth. When checking nethogs, there was usually no download bandwidth at all for the Docker image that successfully downloaded (but occassionally that one was > 1 MB/s), and none for one I’m still waiting on. I suppose that this is likely an issue with whatever Docker repository you’re using, but I thought I would bring it up. It might make more sense for us to compile our own Docker images, which is what we were doing earlier. Thanks.

Yes, we use Docker Hub and I know that sometimes it can be a bit slow. A workaround you can use is to pre-download the base image before issuing the rebuild, with something like: docker pull $(grep -o "discourse/base:[0-9.-]*" launcher) Maybe when GitHub Docker Registry becomes usable we can also host the image in there.

Very slow Docker image download

Product Support

marianord (Mariano Rodriguez) January 13, 2020, 9:27pm 2

My understanding is that Discourse uses Docker HUB, therefore, any issue in bandwidth and/or download speed is between your service provider (VM) and the Docker server itself.

Topic		Replies	Views
Docker install, endless "downloading base image" Self-hosting	5	1804	March 21, 2016
How long does rebuilding take? Product Support	8	2684	June 23, 2016
How long does it take to compile a fork of the discourse docker image? Development	1	510	May 30, 2018
Rebuild not pulling from docker Self-hosting	5	545	March 2, 2023
Docker Rate Limit Error on Launcher Rebuild Product Support	12	1012	December 24, 2024

Very slow Docker image download

Related topics