I had to replace one of my nodes, and the replacement does not properly start SSH.
No problem, mounting the rootfs from a rescue disk and chrooting and... /etc is
read-only? Somehow the overlay for /etc does not work from within a chroot.
And I seem not to find any documentation on the exact layout of the btrfs
subvolumes and the overlay. Is that simply not in the wiki (except the short
summary in https://en.opensuse.org/Portal:MicroOS/Design#Filesystem_Layout)?
(As the machine has a 32 character root password that ansible created for me, I
thought using a rescue stick would be easier...)
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