Hi Michael,
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..
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]
> <javascript:>> 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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