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I downloaded a cloud image of Fedora 25 from: http://ftp.free.fr/mirrors/fedora.redhat.com/fedora/linux/releases/25/CloudImages/x86_64/images/Fedora-Cloud-Base-25-1.3.x86_64.qcow2 At boot, cloud-init fails to fetch my config and so I cannot connect to the VM through SSH: the VM doesn't listen to tcp/22! I'm sorry, I didn't keep logs of the failing cloud-init. I only know that it tried to connect to http://169.254.169.254/2009-04-04/meta-data/instance-id but failed with a timeout. It tried other IPs like 192.168.0.1 if I recall correctly. I don't know which login/password I am supposed to use, it's very hard to find any information about Fedora cloud images :-( See also my complain about the lack of documentation, bug report on the website tracker: https://fedorahosted.org/fedora-websites/ticket/415 I will now try a cloud image from another "random URL" (not mentionned on the main Fedora website, so should I trust it or not?): https://kojipkgs.fedoraproject.org/compose/twoweek/Fedora-Atomic-25-20161216.0/compose/CloudImages/x86_64/images/Fedora-Cloud-Base-25-20161216.0.x86_64.qcow2
Sorry, it seems like my (virtual) router was broken after a reboot of an OpenStack controller. I suspected the new Fedora image before last week it worked fine, but in fact the router crashed during the weekend. Moreover, the router still replied to ping, the issue was more subtle than that... I didn't know that the router can cause issues at cloud-init...