[one-users] Can't access to VM through ssh

Andrea Turli andrea.turli at eng.it
Fri Jul 2 04:02:32 PDT 2010


Hi Carlos,

On 06/30/2010 04:37 PM, Carlos Martín Sánchez wrote:
> Hi again,
>
> Let's check the basics, just in case:
> a) The ttylinux machine you are using is the one downloaded from our 
> site, so it is correctly contextualized.
> b) And you are trying to access the VM 192.168.0.6 from a machine in 
> the same 192.168.0.X network, right?
>
> You may want to try adding another NIC attribute to the template, 
> attached to your public network. This way you could access the VM from 
> anywhere, not just the private network.
We area trying to add another NIC to our template. This is the public 
vnet file we have prepared:

NAME = "public"
TYPE = FIXED

#Now we'll use the cluster private network (physical)
BRIDGE = br0
LEASES = [IP=62.101.90.195]

this public IP is one of our subnet 62.101.90.192/27 without DHCP.

If we create a VM starting from ttylinux template you provided with this 
public vnet, I can start the machine but in the boot log I can see this 
problem:

/etc/rc.d/rc.startup/10.network: line 78 : ./ifup-eth0.template: No such 
file or directory

Anyway I can log in through virt-manager and ifconfig show this

# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:03:3E:65:5A:C3
           inet addr:62.101.90.195  Bcast:62.101.90.223  
Mask:255.255.255.224
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:74 errors:0 dropped:0 overruns:0 frame:0
           TX packets:35 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:8683 (8.4 KiB)  TX bytes:4177 (4.0 KiB)
           Interrupt:11 Base address:0xc100

lo        Link encap:Local Loopback
           inet addr:127.0.0.1  Mask:255.0.0.0
           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)


and there is the problem:

# cat /etc/sysconfig/network-scripts/ifcfg-eth0
     ENABLE=yes
     NAME=Ethernet
     IPADDRESS=62.101.90.195
     CIDRLEN=24
     NETWORK=62.101.90.0
     NETMASK=255.255.255.0
     BROADCAST=62.101.90.255
     DHCP=no
     GATEWAY=62.101.90.1

some network parameters are not correct (like NETWORK; NETMASK and 
BROADCAST). In fact, if I change them manually and restart the network, 
everything works.
Is there any way to configure it in the "publi.net" vnet file?

Thank you,
Andrea


>
> Carlos Martín, Cloud Technology Engineer/Researcher
> DSA Research Group: web http://dsa-research.org and blog 
> http://blog.dsa-research.org
> OpenNebula Open Source Toolkit for Cloud Computing: 
> http://www.OpenNebula.org
>
>
> El 30 de junio de 2010 16:18, Andrea Turli <andrea.turli at eng.it 
> <mailto:andrea.turli at eng.it>> escribió:
>
>     Hi Carlos,
>
>
>     On 06/30/2010 04:07 PM, Carlos Martín Sánchez wrote:
>>     Hi Andrea,
>>
>>     Did you manage to access the VM through ssh? or are you using VNC?
>     Not yet, I can access through virt-manager or virsh to the VM but
>     not through ssh, cause network doesn't work.
>
>>
>>     If you can't ping anything from the VM, maybe you could try
>>     adding other VMs to that private network and check if they see
>>     each other.
>>     Or just configure the VM template to attach a network interface
>>     to the public network.
>>
>     Any ideas?
>
>
>
>>     Regards,
>>
>>     Carlos Martín, Cloud Technology Engineer/Researcher
>>     DSA Research Group: web http://dsa-research.org and blog
>>     http://blog.dsa-research.org
>>     OpenNebula Open Source Toolkit for Cloud Computing:
>>     http://www.OpenNebula.org
>>
>>
>>     2010/6/28 Andrea Turli <andrea.turli at eng.it
>>     <mailto:andrea.turli at eng.it>>
>>
>>         Hi all,
>>
>>         unfortunately also running the fsck on the .img didn't solve
>>         the problem. Here my situation:
>>
>>         - 1 x frontend: ubuntu 10.04 - KVM - NFS
>>         - 1 x cluster node: ubuntu 10.04 - KVM - NFS
>>
>>         A ttylinux VM has been started correctly on the worker node.
>>         From the front end:
>>         # onevm list
>>           ID     USER     NAME STAT CPU     MEM       
>>         HOSTNAME        TIME
>>           21 oneadmin ttylinux runn   0   65536 grids21.eng.it
>>         <http://grids21.eng.it> 00 00:10:22
>>
>>         # onevnet list
>>           ID USER     NAME              TYPE BRIDGE #LEASES
>>            8 oneadmin public          Ranged    br0       0
>>            9 oneadmin private          Fixed    br0       1
>>
>>
>>         The ttylinux VM shows this:
>>         # ifconfig
>>         eth0  ..... inet address 192.168.0.6 ...
>>
>>         but I cannot ping anything from this VM
>>
>>
>>         To help the investigation, here the bctrl show command on the
>>         cluester node
>>         $ brctl show
>>         bridge name    bridge id        STP enabled    interfaces
>>         br0        8000.0019b9e57ae5    no        eth0   vnet0
>>         virbr0        8000.000000000000    yes
>>
>>         Thank you again for any help,
>>         Andrea
>>
>>
>>         On 06/26/2010 09:50 AM, ranjith k wrote:
>>>         hello,
>>>         run the command "qemu-syetm_x86 ttylinux.img" from the
>>>         ttylinux image directory..you can see a window and will
>>>         start boot ttylinux...
>>>         and asked password for recover from the disk failure after
>>>         entering the password "password" you just run the command
>>>         "fsck /dev/hda1" it will remove the error and properly
>>>         shutdown the system by typing the command halt or shutdown
>>>         ....after the correct shutdown and close the window ...and
>>>         try to run the ttylinux again and verify...is it ok then
>>>         again shutdown correctly and copy this ttylinux image for
>>>         your cloud .....
>>>
>>>         On Fri, Jun 25, 2010 at 3:51 PM, Andrea Turli
>>>         <andrea.turli at eng.it <mailto:andrea.turli at eng.it>> wrote:
>>>
>>>             Dear all,
>>>
>>>             I'm trying to access through ssh to my instance of
>>>             ttylinux VM created following this guide
>>>             http://www.opennebula.org/documentation:rel1.4:vmg
>>>             The VM is running and I've this IP address (192.168.0.5)
>>>             according to the "Small Network" network definition but
>>>             I cannot neither ping it not access it on ssh.
>>>
>>>             I've seen also this thread
>>>             http://lists.opennebula.org/pipermail/users-opennebula.org/2010-June/002220.html
>>>             with a similar problem, but also fsck on that VM doesn't
>>>             help me to solve the situation.
>>>
>>>             Could it be related to the network configuration of my
>>>             kvm host?
>>>
>>>             -- 
>>>             Andrea Turli
>>>             Ricercatore
>>>             Direzione Ricerca e Innovazione
>>>             andrea.turli at eng.it  <mailto:andrea.turli at eng.it>
>>>
>>>             Engineering Ingegneria Informatica spa
>>>             Via Riccardo Morandi, 32 00148 Roma (RM)
>>>             Tel. +39 06 8307 4710
>>>             Fax +39 06 8307 4200
>>>             www.eng.it  <http://www.eng.it>
>>>
>>>                  
>>>
>>>
>>>             _______________________________________________
>>>             Users mailing list
>>>             Users at lists.opennebula.org
>>>             <mailto:Users at lists.opennebula.org>
>>>             http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>>
>>>
>>
>>
>>         -- 
>>         Andrea Turli
>>         Ricercatore
>>         Direzione Ricerca e Innovazione
>>         andrea.turli at eng.it  <mailto:andrea.turli at eng.it>
>>
>>         Engineering Ingegneria Informatica spa
>>         Via Riccardo Morandi, 32 00148 Roma (RM)
>>         Tel. +39 06 8307 4710
>>         Fax +39 06 8307 4200
>>         www.eng.it  <http://www.eng.it>
>>
>>              
>>
>>
>>         _______________________________________________
>>         Users mailing list
>>         Users at lists.opennebula.org <mailto:Users at lists.opennebula.org>
>>         http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>
>>
>
>
>     -- 
>     Andrea Turli
>     Ricercatore
>     Direzione Ricerca e Innovazione
>     andrea.turli at eng.it  <mailto:andrea.turli at eng.it>
>
>     Engineering Ingegneria Informatica spa
>     Via Riccardo Morandi, 32 00148 Roma (RM)
>     Tel. +39 06 8307 4710
>     Fax +39 06 8307 4200
>     www.eng.it  <http://www.eng.it>
>
>          
>
>


-- 
Andrea Turli
Ricercatore
Direzione Ricerca e Innovazione
andrea.turli at eng.it

Engineering Ingegneria Informatica spa
Via Riccardo Morandi, 32 00148 Roma (RM)
Tel. +39 06 8307 4710
Fax +39 06 8307 4200
www.eng.it


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