[one-users] Using USER template variable in VM Template

Mon Aug 27 20:23:51 PDT 2012

Dear Ruben,

Your answer below about using oneuser update to modify <TEMPLATE/> of user's information
works perfectly for me(us)!!
Thank you very much for your kind and persistent answers.

Also, please let me know of the patch that you mentioned will be available in a few days.
(about a new variable for user name similar to UID..)
That will be another solution..

Thanks again.
Hyunwoo
FermiCloud Project

=====================
Question 2.
Are SSH_KEY and TEMPLATE the only two <user_attributes>s available
 for $USER? or is there more? if so, what are they?
why can I not use NAME like
CONTEXT = [
username = $USER[NAME, USER_ID=$VID]
]

1.- Templates are free form, you can add anything you want. Please try, in the command line:

>oneuser update
...
This will open your EDITOR, using the standard syntax you can add any variable, e.g.:
NAME=my_user_name
PASSWORD=mypass
SSH_KEY=AHxa245...
LOGIN=my_login

Then simply add to the VM template:

CONTEXT = [
username = $USER[NAME]
login = $USER[LOGIN]
ssh = $USER[SSH_KEY]
]

2.- You do not need to "qualify" the USER, it will always refer to the user creating the VM. Note that otherwise that will be a security hole, as you could access other user data.

3.- There are no variables in the user template by default. Note the <TEMPLATE/> element in oneuser show -x, before and after adding template variables with oneuser update.

________________________________________
From: Ruben S. Montero [rsmontero at opennebula.org<mailto:rsmontero at opennebula.org>]
Sent: Sunday, August 26, 2012 4:33 PM
To: Hyun Woo Kim
Cc: users at lists.opennebula.org<mailto:users at lists.opennebula.org>
Subject: Re: [one-users] Using USER template variable in VM Template

Hi

If you look at the output of the XML, -x option, there is something like:

  <USER>
    <ID>6</ID>
    <GID>1</GID>
    <GNAME>users</GNAME>
    <NAME>demo</NAME>
    <PASSWORD>89e495e7941cf9e40e6980d14a16bf023ccd4c91</PASSWORD>
    <AUTH_DRIVER>core</AUTH_DRIVER>
    <ENABLED>1</ENABLED>
    <TEMPLATE/>
    <DATASTORE_QUOTA/>
    <NETWORK_QUOTA/>
    <VM_QUOTA/>
    <IMAGE_QUOTA/>
  </USER>

You can access to anything inside the <TEMPLATE/> element, empty by default.

There is no direct way to include that information in a VM Template.
This can be done at the API level with some hacking. (Unless you add
NAME to TEMPLATE)

The original set of pre-defined variables UID, TEMPLATE aren't
obviously up-to-date. I've filled an issue to address this for the
next release [1].

Thanks

Ruben

[1] http://dev.opennebula.org/issues/1428

On Sun, Aug 26, 2012 at 11:07 PM, Hyun Woo Kim <hyunwoo at fnal.gov<mailto:hyunwoo at fnal.gov>> wrote:
> Hi,
>
> Thanks very much for the response.
>
> Actually, your answer seems a bit different from what the manual says
> and what I observe.
>
> I observe that the "USERS" actually have "TEMPLATE" attribute
> which returns the contents of "user_pool" in the database
> (We are using MySQL).
> The contents of MySQL "user_pool" contain NAME field.
> I thought these fields in DB and <user_attribute>s of USER template
> somehow are related..
>
> Let me simplify my original question.
> Is there anyway to fetch the NAME field of the DB for the
> user who does "onetemplate instantiate"..?
>
> Thanks,
> Hyunwoo
>
>
>
> Current version of OpenNebula can only access template variables from
> users, or networks. By default users have an empty template, so there
> is no NAME variable unless you define it, e.g. oneuser update. About
> $UID, this variable is predefined so the OpenNebula core it is not
> actually accessing the user information but that stored in the VM.
>
> Cheers
>
> Ruben
>
> On Fri, Aug 24, 2012 at 10:37 PM, Hyun Woo Kim <hyunwoo at fnal.gov<mailto:hyunwoo at fnal.gov>> wrote:
>> Dear Developers,
>>
>> I want to define a variable "username" in CONTEXT
>> and replace it by a real user name who does
>> onetemplate instantiate
>>
>> The CONTEXT section of my VM Template looks like the following;
>> CONTEXT = [
>> username    = "$USER[NAME]"
>> ]
>>
>> I am following the instruction in
>> http://opennebula.org/documentation:archives:rel3.2:template
>> which says at the bottom ;
>> ...
>> Using User template variables
>> $USER[ <user_attribute> ]: Any single value variable in the user template
>> for example: ssh_key = "$USER[SSH_KEY]"
>> The user_attribute can be TEMPLATE to include…
>> …..
>>
>>
>> So, I thought NAME can be one possible <user_attribute> like TEMPLATE,
>> but this does not work..
>> I even tried
>> username    = "$USER[NAME, USER_ID=$UID]"
>> username    = "$USER[NAME, ID=$UID]"
>> username    = "$USER[NAME, USER_ID=2]"
>> username    = "$USER[NAME, ID=2]"
>> All fail..
>>
>> By the way,
>> username    = "$UID" works and username is assigned my correct user id
>>
>> What am I doing wrong here?
>>
>>
>> Thank you.
>> Hyunwoo
>> _______________________________________________
>> Users mailing list
>> Users at lists.opennebula.org<mailto:Users at lists.opennebula.org>
>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>
>
>
>
> --
> Ruben S. Montero, PhD
> Project co-Lead and Chief Architect
> OpenNebula - The Open Source Solution for Data Center Virtualization
> www.OpenNebula.org<http://www.OpenNebula.org> | rsmontero at opennebula.org<mailto:rsmontero at opennebula.org> | @OpenNebula

--
Ruben S. Montero, PhD
Project co-Lead and Chief Architect
OpenNebula - The Open Source Solution for Data Center Virtualization
www.OpenNebula.org<http://www.OpenNebula.org> | rsmontero at opennebula.org<mailto:rsmontero at opennebula.org> | @OpenNebula

--
Ruben S. Montero, PhD
Project co-Lead and Chief Architect
OpenNebula - The Open Source Solution for Data Center Virtualization
www.OpenNebula.org<http://www.OpenNebula.org> | rsmontero at opennebula.org<mailto:rsmontero at opennebula.org> | @OpenNebula