When I use the following in my playbook:
group_by: name=webservers-{{ city | default('no_city')}}
I get this error when running:
TASK: [group_by name=webservers-amsterdam]
****************************************
fatal: [ansible-test] => 'key' is a required argument.
ansible-test is my target host.
What am I doning wrong?
Op woensdag 30 juli 2014 14:15:43 UTC+2 schreef Michael DeHaan:
>
> I would use group_by to create a dynamic group first in a prior play, like
> so:
>
> - hosts: webservers
> tasks:
> - group_by: name=webserver-{{ city | default('no_city') }}
>
> And then you could use, in the template, replace the groupname 'webserver'
> with 'webserver-amsterdam' like so:
>
> groups['webserver-amsterdam'][0]
>
> to select the first one.
>
> Others may prefer deep Jinja2 magic, but I'd find that more readable.
> You can also use the dynamic group for other types of management in Ansible:
>
> - hosts: webservers-amsterdam
> tasks:
> - yum: name=foo state=latest
>
> etc
>
>
>
>
>
>
>
>
>
> On Wed, Jul 30, 2014 at 8:06 AM, Piet83 <[email protected]
> <javascript:>> wrote:
>
>> Thank you Michael for the right syntax :)
>>
>> Is it also possible to select one host in the goup array based on a city
>> defined as variable for a particular host? In other words, I don't know on
>> what position in the array the servername is I need. I only know it is in
>> group databaseserver and that it has amterdam defined as variable city.
>>
>> By the way if I try this in a template:
>>
>> {{ hostvars[groups['databaseserver'][0]].ansible_eth0.ipv4.address }}
>>
>>
>>
>> I get the following error running a playbook with the above in a template:
>> fatal: [localhost] => {'msg': "One or more undefined variables: 'dict'
>> object has no attribute 'ansible_eth0'", 'failed': True}
>> fatal: [localhost] => {'msg': "One or more undefined variables: 'dict'
>> object has no attribute 'ansible_eth0'", 'failed': True}
>>
>> FATAL: all hosts have already failed -- aborting
>>
>>
>>
>>
>>
>>
>>
>> Op dinsdag 29 juli 2014 17:07:57 UTC+2 schreef Michael DeHaan:
>>>
>>> The above imaginary syntax will not work, but this will :) The groups
>>> array contains the names of each host in each group, and this picks out the
>>> first one in inventory order.
>>>
>>> {{ hostvars[groups['databaseserver'][0]].ansible_eth0.ipv4.address }}
>>>
>>> If using a template file versus inline in the playbook, I'd do this:
>>>
>>> {# set db_head_node = groups['databaseserver'][0] #}
>>> {{ hostvars[db_head_node].blarg }}
>>>
>>> for readability purposes
>>>
>>>
>>>
>>>
>>> On Tue, Jul 29, 2014 at 11:02 AM, Piet83 <[email protected]> wrote:
>>>
>>>> Ok but what if I don't know the server name but only that it is an
>>>> database server in amsterdam?
>>>>
>>>> Something like this, but then with the right syntax?
>>>>
>>>> {{ groups["databaseserver"] | {{ hostvars["amsterdam"] }} | {{
>>>> ansible_eth0.ipv4.address }} }}
>>>>
>>>> Op dinsdag 29 juli 2014 14:23:04 UTC+2 schreef Brian Coca:
>>>>
>>>>> just do {{ city }}, if it is the 'current host', to access vars of
>>>>> other hosts {{ hostvars['server3'].city }}
>>>>>
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