SOLVED Problem installing Rancher

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On the first start of a freshly configured DockerVM for Rancher (all set up according to the Guide with 11.1 RELEASE) the Rancher image should be downloaded. However I get a message "Error: failed to download the image!". The VM then doesn't start.

How can I solve this?

Is it possible that a wrong download URL is contained in FreeNAS? Or maybe a resource in the internet is not available at the moment? How can I check this at all? What ports etc. would I need to open in my firewall?

(This is a cross post from here: https://forums.freenas.org/index.ph...up-the-new-docker-vm.58879/page-2#post-427891. However the thread there is marked SOLVED and the scope is pre-release. I wasn't sure if this thread is actually on anyone's radar anymore ...)

 

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One thought: Do I need to upgrade the pool for this to work? I never did this on any FreeNAS upgrade in the past. The ZFS pool is probably on a quite ancient status.

 

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Well. I had a DNS problem in my FreeNAS. Although the name server was still contained in the settings the upgrade to 11.1 must have somehow deleted the DNS entry under the hood.