[one-users] Problem Login/ssh into vm
Alexander Sibetheros
alexsibeth at gmail.com
Wed Dec 18 14:23:58 PST 2013
I'm am writing again to clarify I fixed the 1st problem.
I was trying to ssh from the root at node instead of oneadmin at node(which I
never used before). I can successfully ssh, change root password :) Thank
you very much for your ideas.
I am not able to do such from oneadmin at controller though(controller->vm,
instead of host->vm). Ssh and ping both fail and I don't understand how
tcpdump works.
I did find that there is a problem with the way opennebula works with
ip/mac address of vm's and that a special script is needed to correctly map
them, but I don't really understand what is going on.
Specifically I found:
(1)
http://lists.opennebula.org/pipermail/users-opennebula.org/2011-December/007042.html
"Using the CONTEXT cdrom, the init.sh script in executed at boot time. You
can modify the init.sh script to set your broadcast address and netmask.
You can hardcode these values, or pass them as a CONTEXT sub-attribute;
take a look at the DNS example from the contextualization guide:
"
(2) http://opennebula.org/documentation:archives:rel3.0:cong
Using Virtual Network Leases within a Virtual Machine
(3)
http://serverfault.com/questions/331145/bridging-virtual-networking-into-real-lan-on-a-opennebula-cluster
OpenNebula, by design, doesn't actually manage IP addresses even though
it maintains a pool of them and "leases" them out. What it's really
doing is assigning a MAC address to the virtual ethernet interface that
has the desired IP address encoded in the last 4 bytes of the MAC
address, and it's up to the OS to recognize that and assign an IP
appropriately.
On Wed, Dec 18, 2013 at 10:38 PM, Alexander Sibetheros <alexsibeth at gmail.com
> wrote:
> But that is exactly the problem. I can access the vm via vnc(from
> sunstone), but get login screen(local host login/password which I don't
> know). So, I can't check for daemons. I read online that for the images
> created for kvm/opennebula access is done via ssh(passwordless).
>
> Because the image I am using is prebuilt for opennebula, I imagine
> something is wrong in my controller/node configuration, but do not know
> where to look.
>
>
>
> On Wed, Dec 18, 2013 at 10:21 PM, Jens Hoffmann <jens.hoffmann at cuesoft.eu>wrote:
>
>> Can you login into your vms via vnc and investigate, i.e. if ssh daemon
>> is running and if ssh keys are correctly inserted into your login-user's
>> authorized_keys?
>>
>> The ping problem may be a routing problem on your host. Check if the
>> host has ip_forwarding enabled such that the host forwards packages between
>> "eth0" and "br0", that is between the bridge and your host's physical nic.
>> If this does not help, investigate your routing tables and try to track
>> your ping's package flow with tcpdump.
>>
>>
>>
>>
>> Jens
>> -- gpg --keyserver pgp.mit.edu --recv-keys 0xDB1CAFB5
>>
>>
>> On 12/18/2013 07:52 PM, Alexander Sibetheros wrote:
>>
>> I would like to note that when I added tty-linux - kvm from the
>> marketplace, created a simple template(same as the centOS), and run it, I
>> was able to login and use the vm. So I know the host works, and my problem
>> most likely is in the way ssh works from the controller to vm's...
>>
>> Also noteworthy, I cannot ping the vm's from the controller...only from
>> the host. Im not sure this is correct or not.
>>
>>
>>
>> On Wed, Dec 18, 2013 at 4:48 PM, Alexander Sibetheros <
>> alexsibeth at gmail.com> wrote:
>>
>>> I am following this tutorial, as closely as possible:
>>> http://www.opennebula.org/documentation:rel4.4:qs_ubuntu_kvm
>>>
>>> TEMPLATE 0
>>> INFORMATION
>>> ID : 0
>>> NAME : CentOS-6.4
>>> USER : oneadmin
>>> GROUP : oneadmin
>>> REGISTER TIME : 12/16 13:44:54
>>>
>>> PERMISSIONS
>>>
>>> OWNER : um-
>>> GROUP : ---
>>> OTHER : ---
>>>
>>> TEMPLATE
>>> CONTENTS
>>> CONTEXT=[
>>> SSH_PUBLIC_KEY="$USER[SSH_PUBLIC_KEY]" ]
>>> CPU="1.0"
>>> DISK=[
>>> IMAGE="CentOS-6.4_x86_64" ]
>>> GRAPHICS=[
>>> LISTEN="0.0.0.0",
>>> TYPE="vnc" ]
>>> MEMORY="512"
>>> NIC=[
>>> NETWORK="private" ]
>>> OS=[
>>> ARCH="x86_64" ]
>>> VCPU="1"
>>>
>>>
>>>
>>> On Wed, Dec 18, 2013 at 4:35 PM, Carlos Martín Sánchez <
>>> cmartin at opennebula.org> wrote:
>>>
>>>> Hi Alexander,
>>>>
>>>> On Wed, Dec 18, 2013 at 3:28 PM, Alexander Sibetheros <
>>>> alexsibeth at gmail.com> wrote:
>>>>
>>>> I'll give the docs you sent a look but my configurations where the
>>>>> default in the tutorial:
>>>>>
>>>>> $ oneimage create --name "CentOS-6.4_x86_64" \
>>>>> --path "http://us.cloud.centos.org/i/one/c6-x86_64-20130910-1.qcow2.bz2" \
>>>>> --driver qcow2 \
>>>>> --datastore default
>>>>>
>>>>> $ onetemplate create --name "CentOS-6.4" --cpu 1 --vcpu 1 --memory 512 \
>>>>> --arch x86_64 --disk "CentOS-6.4_x86_64" --nic "private" --vnc \
>>>>> --ssh
>>>>>
>>>>>
>>>>> Before creating the vm I added the ssh parameters to the user:
>>>>>
>>>>> """$ EDITOR=vi oneuser update oneadmin
>>>>> Add a new line like the following to the template:
>>>>> SSH_PUBLIC_KEY="ssh-dss AAAAB3NzaC1kc3MAAACBANBWTQmm4Gt..."
>>>>> Substitute the value above with the output of cat ~/.ssh/id_dsa.pub."""
>>>>>
>>>>> $ onetemplate instantiate "CentOS-6.4" --name "My Scratch VM"
>>>>>
>>>>>
>>>> Which tutorial are you following?
>>>> And could you paste the output of onetemplate show <id>?
>>>>
>>>> Regards
>>>> --
>>>> Carlos Martín, MSc
>>>> Project Engineer
>>>> OpenNebula - Flexible Enterprise Cloud Made Simple
>>>> www.OpenNebula.org | cmartin at opennebula.org | @OpenNebula<http://twitter.com/opennebula>
>>>>
>>>>
>>>> On Wed, Dec 18, 2013 at 3:28 PM, Alexander Sibetheros <
>>>> alexsibeth at gmail.com> wrote:
>>>>
>>>>> I'll give the docs you sent a look but my configurations where the
>>>>> default in the tutorial:
>>>>>
>>>>> $ oneimage create --name "CentOS-6.4_x86_64" \
>>>>> --path "http://us.cloud.centos.org/i/one/c6-x86_64-20130910-1.qcow2.bz2" \
>>>>> --driver qcow2 \
>>>>> --datastore default
>>>>>
>>>>> $ onetemplate create --name "CentOS-6.4" --cpu 1 --vcpu 1 --memory 512 \
>>>>> --arch x86_64 --disk "CentOS-6.4_x86_64" --nic "private" --vnc \
>>>>> --ssh
>>>>>
>>>>>
>>>>> Before creating the vm I added the ssh parameters to the user:
>>>>>
>>>>> """$ EDITOR=vi oneuser update oneadmin
>>>>> Add a new line like the following to the template:
>>>>> SSH_PUBLIC_KEY="ssh-dss AAAAB3NzaC1kc3MAAACBANBWTQmm4Gt..."
>>>>> Substitute the value above with the output of cat ~/.ssh/id_dsa.pub."""
>>>>>
>>>>> $ onetemplate instantiate "CentOS-6.4" --name "My Scratch VM"
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Wed, Dec 18, 2013 at 2:05 PM, Carlos Martín Sánchez <
>>>>> cmartin at opennebula.org> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> On Wed, Dec 18, 2013 at 12:03 PM, Alexander Sibetheros <
>>>>>> alexsibeth at gmail.com> wrote:
>>>>>>
>>>>>>> I checked the marketplace.. all vms for xen/vmware bases have
>>>>>>> default username/passwords.
>>>>>>> KVM on the otherhand writes: Add `SSH_PUBLIC_KEY` to
>>>>>>> contextualization to set root credentials.
>>>>>>>
>>>>>>
>>>>>> I assume you are using this image from the marketplace:
>>>>>>
>>>>>> http://docs.opennebula.org/stable/administration/references/schg.html#configuration
>>>>>>
>>>>>> Maybe the problem is a wrong syntax in the VM template. Can you
>>>>>> paste its contents?
>>>>>> It should follow the syntax described here:
>>>>>>
>>>>>> http://docs.opennebula.org/stable/user/references/template.html?highlight=context#context-section
>>>>>>
>>>>>> You can read more about the contextualization mechanism here:
>>>>>>
>>>>>> http://docs.opennebula.org/stable/user/virtual_machine_setup/context_overview.html
>>>>>>
>>>>>> Regards
>>>>>>
>>>>>> --
>>>>>> Carlos Martín, MSc
>>>>>> Project Engineer
>>>>>> OpenNebula - Flexible Enterprise Cloud Made Simple
>>>>>> www.OpenNebula.org | cmartin at opennebula.org | @OpenNebula<http://twitter.com/opennebula>
>>>>>>
>>>>>>
>>>>>> On Wed, Dec 18, 2013 at 12:03 PM, Alexander Sibetheros <
>>>>>> alexsibeth at gmail.com> wrote:
>>>>>>
>>>>>>> Unfortunately no..
>>>>>>> I checked the marketplace.. all vms for xen/vmware bases have
>>>>>>> default username/passwords.
>>>>>>> KVM on the otherhand writes: Add `SSH_PUBLIC_KEY` to
>>>>>>> contextualization to set root credentials.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Wed, Dec 18, 2013 at 12:47 PM, Jens Hoffmann <
>>>>>>> jens.hoffmann at cuesoft.eu> wrote:
>>>>>>>
>>>>>>>> Does this link provide correct credentials for your image:
>>>>>>>>
>>>>>>>> http://opennebula.org/cloud:sandbox:kvm#what_are_the_users_and_the_passwords
>>>>>>>> ?
>>>>>>>>
>>>>>>>>
>>>>>>>> Jens
>>>>>>>>
>>>>>>>> --
>>>>>>>> gpg --keyserver pgp.mit.edu --recv-keys 0xDB1CAFB5
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On 12/18/2013 11:31 AM, Alexander Sibetheros wrote:
>>>>>>>> > I recently set up a simple 2 node opennebula(ubuntu/kvm) (using
>>>>>>>> vmware
>>>>>>>> > vm's), following the tutorial.
>>>>>>>> >
>>>>>>>> > I got a centOS vm to run, but cannot log in.
>>>>>>>> > I read on other sites that login in is done via ssh and not vnc,
>>>>>>>> but
>>>>>>>> > whenever I ssh root at ..vm_ip... I get prompted for password which
>>>>>>>> I
>>>>>>>> > dont have.
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > I followed this step from the tutorial(before running I ran
>>>>>>>> ssh-keygen
>>>>>>>> > -t dsa, because the id_dsa.pub file did not exist):
>>>>>>>> >
>>>>>>>> > """In order to dynamically add ssh keys to Virtual Machines we
>>>>>>>> must
>>>>>>>> > add our ssh key to the user template, by editing the user
>>>>>>>> template:
>>>>>>>> >
>>>>>>>> > $ EDITOR=vi oneuser update oneadmin
>>>>>>>> >
>>>>>>>> > Add a new line like the following to the template:
>>>>>>>> >
>>>>>>>> > SSH_PUBLIC_KEY="ssh-dss AAAAB3NzaC1kc3MAAACBANBWTQmm4Gt..."
>>>>>>>> >
>>>>>>>> > Substitute the value above with the output of |cat
>>>>>>>> ~/.ssh/id_dsa.pub|."""
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > --
>>>>>>>> > Alexander Sibetheros
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > _______________________________________________
>>>>>>>> > Users mailing list
>>>>>>>> > Users at lists.opennebula.org
>>>>>>>> > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Users mailing list
>>>>>>>> Users at lists.opennebula.org
>>>>>>>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Alexander Sibetheros
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Users mailing list
>>>>>>> Users at lists.opennebula.org
>>>>>>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Alexander Sibetheros
>>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> Alexander Sibetheros
>>>
>>
>>
>>
>> --
>> Alexander Sibetheros
>> Student at University of Athens,
>> Department of Informatics and Telecommunications
>>
>>
>>
>>
>
>
> --
> Alexander Sibetheros
> Student at University of Athens,
> Department of Informatics and Telecommunications
>
--
Alexander Sibetheros
Student at University of Athens,
Department of Informatics and Telecommunications
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