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On my local Macbook I can pull and build a particular Postgres container without issue. However, on an Azure VM running Ubuntu 16.04 it hangs on "Extracting" until finally my ssh connection is closed. How can I best diagnose this or what may be happening to cause this?

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rgwozdz
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  • Is it a particularly large image on a tiny vm? It sounds kind of out of memoryish – Matt Feb 22 '18 at 08:56
  • I have similar issue, on big layers the docker pull usually hangs (sometimes even for a minute) and then it resumes and works correctly... – Mazel Tov Feb 22 '18 at 13:17
  • @Matt - It's a decently sized VM. 3.5 GB memory. I've tried various images and the same thing happens. – rgwozdz Feb 22 '18 at 14:36
  • I suspect it has something to do with Azure. As noted above, I use a standard Ubuntu image and install latest-stable Docker and Docker-compose myself. I tried again using Azure's Ubuntu+Docker image, but then upgraded both Docker and Docker-compose. I'm not having the issue anymore. – rgwozdz Feb 22 '18 at 14:47
  • Maybe it's the Docker storage driver mixed with Azures storage backend then? Can you add the `docker info` from the server. Try mounting `/var/lib/docker` on temporary storage. Try it on premium disk. [Try moving to the `devicemapper` driver](https://stackoverflow.com/a/37681340/1318694) – Matt Feb 22 '18 at 23:45
  • Specifically the [`direct-lvm` mode for `devicemapper`](https://docs.docker.com/storage/storagedriver/device-mapper-driver/#configure-direct-lvm-mode-for-production) – Matt Feb 22 '18 at 23:50
  • same here but running docker on windows. I think it's an azure issue. – koo9 Feb 26 '18 at 01:42
  • My work around was to launch a VM based on the Azure Ubuntu+Docker image, but that image ships with Docker-compose 2 and I need 3. So I used that image, but upgraded the Docker-compose. Then everything works. My guess is that the Ubuntu+Docker image has some additional configuration to make Docker work on Azure. – rgwozdz Feb 26 '18 at 18:56

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