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I have a Ubuntu 14.10 VPS. Everytime I try to upgrade to 15.04 I experience weird symptoms. I was able to upgrade from 14.04 to 14.10 with no problems. After the upgrade is successful and the server reboots, it is no longer reachable by normal means, only through the emergency ssh interface of my provider.
When connected my ifconfig output is as follows:
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Previously I also had this:
venet0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:127.0.0.2 P-t-P:127.0.0.2 Bcast:0.0.0.0 Mask:255.255.255.255
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
RX packets:14177 errors:0 dropped:0 overruns:0 frame:0
TX packets:12143 errors:0 dropped:1 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:8039529 (8.0 MB) TX bytes:7086087 (7.0 MB)
venet0:0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:XXXXXXXXXX P-t-P:XXXXXXXXXXXXXX Bcast:XXXXXXXXXXXXX Mask:255.255.255.255
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
So basically after upgrading my virtual network interface disappears and I have to restore a backup. I also noticed that there are almost no processes running (like 5). For example apache2 and mysqld which are supposed to start automatically did not. I did roll back to 14.04 for now, but I would really like to upgrade without having to install everything again. Are there some kind of config files which I should back up before trying again? How can I upgrade without breaking everything?
Thanks, I tried this, but none of the files are changed. – Andreas Hartmann – 2015-06-13T10:43:28.773