Comment # 3 on bug 1132269 from Adam Mizerski

> Let's check some basics first:
> 1. I assume you have been using a somewhat recent version of transactional-update (i.e. >= 2.13.1) for this update. The version which was used for the update can be found in /var/log/transactional-update.log.

openSUSE 15.0 has currently transactional-update 2.11.

> 2. I assume the system has been rebooted after a new snapshot was created?

Yes. 

> 3. Have you manually modified files in /var/lib/overlay?

No

> You mentioned on the mailing list that the correct version of the files was still available in some older snapshot overlay. Is this also the case now? Which file(s) are affected this time?

Yes. This time I found that passwd, group, nginx, letsencrypt and wireguard
files were reverted. These are the ones that I found, because things were
broken. I haven't checked if others were affected. I found and recovered them
using for example "md5sum /.snapshots/*/snapshot/etc/wireguard/wg0.conf"

> To get a better overview of the current state could you paste the output of the following commands:
> - snapper list

Type   | #   | Pre # | Date                     | User | Cleanup | Description 
           | Userdata     
-------+-----+-------+--------------------------+------+---------+-------------------------+--------------
single | 0   |       |                          | root |         | current     
           |              
pre    | 123 |       | Sun Nov 25 00:54:11 2018 | root | number  | RO-Clone of
#122        | important=yes
post   | 124 | 123   | Sun Nov 25 00:54:12 2018 | root | number  | Snapshot
Update         |              
pre    | 125 |       | Thu Nov 29 00:28:17 2018 | root | number  | RO-Clone of
#124        | important=yes
post   | 126 | 125   | Thu Nov 29 00:28:18 2018 | root | number  | Snapshot
Update         |              
pre    | 127 |       | Fri Nov 30 00:44:32 2018 | root | number  | RO-Clone of
#126        | important=yes
post   | 128 | 127   | Fri Nov 30 00:44:32 2018 | root | number  | Snapshot
Update         |              
pre    | 129 |       | Fri Dec  7 01:30:46 2018 | root | number  | RO-Clone of
#128        | important=yes
post   | 130 | 129   | Fri Dec  7 01:30:47 2018 | root | number  | Snapshot
Update         |              
single | 192 |       | Thu Apr  4 00:23:24 2019 | root | number  | Snapshot
Update of #191 |              
single | 193 |       | Fri Apr  5 01:59:52 2019 | root | number  | Snapshot
Update of #192 |              
single | 194 |       | Sat Apr  6 00:32:18 2019 | root | number  | Snapshot
Update of #193 |              
single | 195 |       | Sun Apr  7 01:06:45 2019 | root | number  | Snapshot
Update of #194 |              
single | 196 |       | Tue Apr  9 00:17:25 2019 | root | number  | Snapshot
Update of #195 |              
single | 197 |       | Wed Apr 10 00:35:15 2019 | root | number  | Snapshot
Update of #196 |              
single | 198 |       | Thu Apr 11 00:03:20 2019 | root | number  | Snapshot
Update of #197 |              
single | 199 |       | Fri Apr 12 00:20:29 2019 | root | number  | Snapshot
Update of #198 |              
single | 200 |       | Sat Apr 13 01:44:47 2019 | root | number  | Snapshot
Update of #199 |              
single | 201 |       | Sun Apr 14 01:09:47 2019 | root | number  | Snapshot
Update of #200 |              
single | 202 |       | Mon Apr 15 00:10:13 2019 | root |         | Snapshot
Update of #201 |              
single | 203 |       | Tue Apr 16 01:19:12 2019 | root |         | Snapshot
Update of #202 |              

> - ls /var/lib/overlay

# ls /var/lib/overlay
180  181  182  183  184  185  186  187  188  189  190  191  192  193  194  195 
196  197  198  199  200  201  202  203  etc  work-etc

> - cat /etc/fstab

# cat /etc/fstab
/dev/system/root  /                       btrfs  ro,compress=lzo              
0  0
/dev/system/root  /var                    btrfs  subvol=/@/var                
0  0
/dev/system/root  /usr/local              btrfs  subvol=/@/usr/local          
0  0
/dev/system/root  /tmp                    btrfs  subvol=/@/tmp                
0  0
/dev/system/root  /srv                    btrfs  subvol=/@/srv                
0  0
/dev/system/root  /root                   btrfs  subvol=/@/root               
0  0
/dev/system/root  /opt                    btrfs  subvol=/@/opt                
0  0
/dev/system/home  /home                   xfs    defaults                     
0  0
/dev/system/root  /boot/grub2/x86_64-efi  btrfs 
subvol=/@/boot/grub2/x86_64-efi  0  0
/dev/system/root  /boot/grub2/i386-pc     btrfs  subvol=/@/boot/grub2/i386-pc 
0  0
/dev/system/root  /.snapshots             btrfs  subvol=/@/.snapshots         
0  0
/dev/system/swap  swap                    swap   defaults                     
0  0

# findmnt | grep etc
������/etc                                overlay                                  
          overlay   
rw,relatime,lowerdir=/sysroot/var/lib/overlay/202/etc:/sysroot/var/lib/overlay/201/etc:/sysroot/var/lib/overlay/200/etc:/sysroot/var/lib/overlay/199/etc:/sysroot/var/lib/overlay/198/etc:/sysroot/var/lib/overlay/197/etc:/sysroot/var/lib/overlay/196/etc:/sysroot/var/lib/overlay/195/etc:/sysroot/var/lib/overlay/194/etc:/sysroot/var/lib/overlay/193/etc:/sysroot/var/lib/overlay/192/etc:/sysroot/var/lib/overlay/191/etc:/sysroot/var/lib/overlay/etc:/sysroot/etc,upperdir=/sysroot/var/lib/overlay/203/etc,workdir=/sysroot/var/lib/overlay/work-etc