That worked. Thanks!
On Sunday, April 12, 2015 at 2:29:03 AM UTC-7, Tzach Livyatan wrote:
>
> Here is a similar example from my project
>
> Creating the instance on EC2:
> ---
> - name: Create a cluster nodes on EC2
> hosts: localhost
> connection: local
>
> tasks:
> - name: Launch instances
> local_action:
> module: ec2
> region: "{{region}}"
> keypair: "{{key_name}}"
> group: "{{security_group}}"
> instance_type: "{{instance_type}}"
> image: "{{image}}"
> count: "{{cluster_nodes}}"
> wait: yes
> register: ec2_cluster
>
> - name: Add instances to private ip group
> local_action: add_host name={{item.private_ip}} groupname=Private
> with_items: ec2_cluster.instances
>
> In the role vars/main.yaml:
> seed: "{{groups.Private[0]}}"
>
> And using "seed" in the relevant template.
>
> On Friday, April 3, 2015 at 9:26:54 PM UTC+3, James Martin wrote:
>>
>> Mike,
>>
>> This may give you some insight:
>>
>>
>> https://github.com/basho-labs/ansible-riak/blob/develop/examples/form_cluster.yml
>>
>> Particularly:
>>
>> primary_node: "{{
>> hostvars[groups['riak_cluster'][0]]['riak_outputs']['node_name'] }}"
>>
>> - James
>>
>>
>>
>> On Wednesday, April 1, 2015 at 5:16:12 PM UTC-4, MikeA wrote:
>>>
>>> I'm launching a cluster of ec2 instances and would like one (don't care
>>> which one) of them to become a head node and pass it's IP to the other
>>> cluster members. I've been looking for an easy way to do this but could not
>>> fine one so would appreciate any assistance.
>>>
>>> Here is what I've got.
>>> from my main playbook I'm calling a sub playbook that launches the ec2
>>> instances. there i add the instances to the {{ group_name }} group. where
>>> group_name is a variable defined in a var file.
>>>
>>> later on the main playbook I'd like to pull one of the IP's and feed it
>>> into a startup script to be called on all the hosts.
>>>
>>> I could not find a way to extract element 0 from the group_name var
>>> array.I tried this: set_fact: headnode={{ groups[[{{ group_name }}][0]] }}
>>> but it did not work. I had to use the actual group_var value and then I got
>>> the IP but it was not a clean string rather it looked like this:
>>> [u'10.77.0.211',
>>>
>>> Any idea how to get a clean IP from the group_name set? BDW in the sub
>>> playbook where I launch the instances I register the private ip's from the
>>> instances: set_fact: private_ips: "{{ ec2.tagged_instances|join(', ',
>>> attribute='private_ip') }}" but I cannot refer to this variable back in the
>>> main playbook.
>>>
>>> thanks in advance.
>>>
>>
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