Public bug reported:
After upgrade and reboot the first thing I noticed was that no DNS
resolution was occurring. I run ISPConfig with my own DNS running in
this machine, so that was pretty strange. I checked the /etc/resolv.conf
file and it was empty. So I populated it. Success! Or so I thought
I could only resolve names that are in my own DNS! There was no
forwarding out to Covad's DNS servers! I verified they were up from
another computer and things were fine with my network and names could be
resolved. Also, if I was on my own network, I could get to websites
hosted by ISPConfig on this server! So I thought things were close!
I read other posts about disabling NetworkManager so I tried that but
had no luck. Turns out it wasn't really disabled. So I tried to use
NetworkManager to configure both NICs with a single static IP address.
That kind of worked! So I thought I was onto something
I tried many, many ways to plumb up the VIPs (3 per NIC) but couldn't
figure out how to do that, so I abandoned NetworkManager. This time I
made sure it was gone! I renamed the files after running synaptic to
remove the packages.
I restored my original /etc/network/interfaces file and my original
/etc/resolv.conf. Then rebooted.
Things were still messed up. Not really sure why as all physical and
virtual IPs were up and running. Plus the netstat -rn output looked
fine, but still no DNS resolution. Turns out that ALL traffic was going
over NIC 0 (eth0) even though NIC 1 (eth1) was up and running! Not sure
what that had to do with DNS resolution, but I would see a DNS Request
followed by a DNS Response with the proper IP addresses, but for some
unknown reason, this never reached the application layer (dig, nslookup,
bind9).
So I ran 'ifdown eth0' then 'ifdown eth1'. I stopped all network
services (bind9, ntp, ISPConfig and anything else I could find). Then
ran 'ifup eth0'. Still no network services running. Now I could run
dig/nslookup and things worked fine!
So, I then ran 'ifup eth1' and things broke again! No clue as to why!!!!
Subsequently, I ran 'ifdown eth1' and things worked! So I started the
network services (bind9/ntp/ISPconfig) and they all work fine, including
those with IP addresses bound to NIC 1 (eth1).
** Affects: ubuntu
Importance: Undecided
Status: New
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Network Settings Not Applied after upgrade to 8.10
https://bugs.launchpad.net/bugs/304901
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