I think there was a typo, instead of using {# #} you should probably be
using {% %}
The {# #} characters indicate a jinja2 comment.
On Wednesday, January 14, 2015, Mark Maas <[email protected]> wrote:
> Gents,
>
> Could you elaborate a bit on how to use this?
>
> You see, i’m trying to do the same thing:
>
> # Cluster connection URL
> {# set mysql_hosts = groups["tag_type_mysql"] |
> intersect(groups["tag_environment_dev"]) #}
> wsrep_cluster_address=gcomm://{% for host in mysql_hosts %}{{
> hostvars[host]['ansible_eth0']['ipv4']['address'] }},{% endfor %}
>
> But the variable “mysql_hosts” does not seem to get populated:
>
> fatal: [10.220.226.243] => {'msg': "AnsibleUndefinedVariable: One or more
> undefined variables: 'mysql_hosts' is undefined", 'failed': True
>
> When I look at the two groups:
>
> type mysql group
> {{ groups.tag_type_mysql | to_nice_yaml }}
> env dev group
> {{ groups.tag_environment_dev | to_nice_yaml }}
>
> They result in:
>
> type mysql group
>
> - 10.220.226.243
> - 10.220.227.5
> - 10.220.225.203
> env dev group
>
> - 10.220.2.242
> - 10.220.3.129
> - 10.220.227.77
> - 10.220.222.24
> - 10.220.221.8
> - 10.220.226.9
> - 10.220.226.243
> - 10.220.226.70
> - 10.220.227.5
> - 10.220.225.203
> - 10.220.227.20
> - 10.220.1.169
> - 10.220.225.84
> - 10.220.220.247
> - 10.220.225.126
>
> so I know they exist and are filled..
>
> Thanks for looking!
> On Wednesday, July 9, 2014 at 10:00:43 PM UTC+2, Michael DeHaan wrote:
>
> In your template above I'd probably just assign a "my_hosts" variable to
>> the expression to clean up the loop a bit.
>>
>> {# set my_hosts = groups["tag_provides_logstash-server"] |
>> intersect(groups["tag_env_dev"]) #}
>> {% for host in my_hosts %}
>>
>> etc
>>
>> The other thing you have is the "play_hosts" variable in Ansible which
>> should return all the hosts in the current play.
>>
>> So to your question, yes, there are easier ways now that can make things
>> easier to follow.
>>
>>
>>
>>
>>
>> On Wed, Jul 9, 2014 at 3:28 PM, Ehtesh Choudhury <[email protected]>
>> wrote:
>>
>>> I'm using ec2.py as my hostfile and I'm writing the following templating
>>> in
>>> Jinja2.
>>>
>>> {% for host in groups["tag_provides_logstash-server"] %}
>>> # {{ hostvars[host]["ec2_ip_address"] }} {{
>>> hostvars[host]["ec2_tag_Name"] }}
>>> {% endfor %}
>>>
>>> # This isn't valid in Jinja2, but is what I"m looking for:
>>> # groups["tag_provides_logstash-server:&tag_env_dev"]
>>>
>>> Other people have aimed for this behavior before:
>>>
>>> https://groups.google.com/forum/#!topic/Ansible-project/QuqXUV_BEMM
>>>
>>> Gustavo's resolution isn't as simple as I would like, though.
>>> This is what I have settled on for now:
>>>
>>> {% for host in groups["tag_provides_logstash-server"] |
>>> intersect(groups["tag_env_dev"]) %}
>>> # {{ hostvars[host]["ec2_ip_address"] }} {{
>>> hostvars[host]["ec2_tag_Name"] }}
>>> {% endfor %}
>>>
>>> It looks good, but I would like to know if there's anything grossly
>>> wrong or
>>> devious with this approach.
>>>
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>>
>>
>
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--
Matt Martz
@sivel
sivel.net
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