apt-get issue após a atualização para 12.04

Question

Atualizei recentemente meu cluster de 11,10 para 12,04. Após o upgrade, estou tendo problemas para executar o apt-get nos nós do cluster. Eu posso ssh entre os nós (client-to-client, client-to-head, client-to-external etc.). No entanto, o sudo apt-get update produz os seguintes erros:

Ign http://us.archive.ubuntu.com precise InRelease                             
Ign http://security.ubuntu.com precise-security InRelease                      
Ign http://www.openfoam.org maverick InRelease                                 
Ign http://us.archive.ubuntu.com precise-updates InRelease                                                    
Err http://security.ubuntu.com precise-security Release.gpg                                                   
  Something wicked happened resolving 'security.ubuntu.com:http' (-5 - No address associated with hostname)
Err http://www.openfoam.org maverick Release.gpg                                                              
  Something wicked happened resolving 'www.openfoam.org:http' (-5 - No address associated with hostname)
Ign http://us.archive.ubuntu.com precise-backports InRelease                                                  
Ign http://www.openfoam.org maverick Release                                                                  
Ign http://security.ubuntu.com precise-security Release                      
Err http://us.archive.ubuntu.com precise Release.gpg                                                          
  Something wicked happened resolving 'us.archive.ubuntu.com:http' (-5 - No address associated with hostname)
Ign http://security.ubuntu.com precise-security/main Sources/DiffIndex                                        
Err http://us.archive.ubuntu.com precise-updates Release.gpg                                                  
  Something wicked happened resolving 'us.archive.ubuntu.com:http' (-5 - No address associated with hostname)
Ign http://security.ubuntu.com precise-security/restricted Sources/DiffIndex                                  
15% [Connecting to us.archive.ubuntu.com] [Connecting to security.ubuntu.com] [Connecting to www.openfoam.org]

No headnode, eu tenho em /etc/network/iterfaces :

auto eth0
iface eth0 inet static
address 192.168.0.1/24

Nos nós clientes, tenho /etc/network/iterfaces :

auto eth0
iface eth0 inet static
address 192.168.0.101
netmask 255.255.255.0
gateway 192.168.0.1

Por favor avise.

Em um nó cliente "em funcionamento", obtenho:

mpiuser@crayN4-5150jo:~$ nslookup security.ubuntu.com
Server:     127.0.0.1
Address:    127.0.0.1#53

Non-authoritative answer:
Name:   security.ubuntu.com
Address: 91.189.92.184
Name:   security.ubuntu.com
Address: 91.189.92.190

Resultados de ping

mpiuser@crayN4-5150jo:~$ ping -c 3 security.ubuntu.com
PING security.ubuntu.com (91.189.92.190) 56(84) bytes of data.
64 bytes from 91.189.92.190: icmp_req=1 ttl=49 time=94.6 ms
64 bytes from 91.189.92.190: icmp_req=2 ttl=49 time=105 ms
64 bytes from 91.189.92.190: icmp_req=3 ttl=49 time=103 ms

--- security.ubuntu.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 15674ms
rtt min/avg/max/mdev = 94.643/101.462/105.847/4.887 ms

Em um nó cliente não funcional:

mpiuser@crayN2-5150jo:~$ nslookup security.ubuntu.com
;; Got SERVFAIL reply from 127.0.0.1, trying next server
;; Got SERVFAIL reply from 127.0.0.1, trying next server
Server:     ::1
Address:    ::1#53

** server can't find security.ubuntu.com: SERVFAIL

Ping

mpiuser@crayN2-5150jo:~$ ping -c 3 security.ubuntu.com
ping: unknown host security.ubuntu.com

    

Answer 1

O problema está resolvido. Eu adicionei a seguinte linha em /etc/network/interfaces :

dns-nameservers 8.8.8.8 8.8.4.4