Ansible:how to adapt the output format of map (with extract) filters

Question

I am trying to extract the IP addresses of the hosts that are part of two groups and use them in a .xml config file.

The problem I'm facing here is the output generated by the expression used into the jinja template. What I want to achieve is an output like 10.3.5.1,10.3.5.2,10.3.5.2 but instead of this I'm obtaining something like [u'10.3.5.1],[u'10.3.5.2],[u'10.3.5.2].

This is the expression used into the jinja template:

<member1>{{ (groups['group_one']+groups['group_two']) | map('extract',hostvars,'ansible_ip_addresses') | list | unique | join(',') }}</member1>

I have also tried some other filters but I could not get the expected result.

What filters should I use for this? (I couldn't find the right ones)

What is this fact `ansible_ip_addresses` that you are using? It doesn't appear to be a standard fact. Where did it come from? How did you set it? — Michael Hampton, Mar 12 '18 at 16:48
this is an ansible fact collected from a windows host. I am using ansible 2.4.2.0 — pandoJohn, Mar 12 '18 at 16:55
That's interesting. What does it look like? I have no Windows hosts, and Linux hosts have no such fact. — Michael Hampton, Mar 12 '18 at 16:57
Hm, OK, that seems reasonable. Linux hosts get two different facts, `ansible_all_ipv4_addresses` and `ansible_all_ipv6_addresses`, which are also just lists of strings. These appear to work in this template. So I'm not sure what exactly is going on here. — Michael Hampton, Mar 12 '18 at 17:21

score 2 · Accepted Answer · answered Mar 12 '18 at 19:27

ansible_ip_addresses is a list, so you have a list (of hosts) with nested lists (with ip addresses).

You probably want to flatten it before applying unique and join:

{{ (groups['group_one']+groups['group_two']) | map('extract',hostvars,'ansible_ip_addresses') | list | sum(start=[]) | unique | join(',') }}

This will make a flat list with single ip-address as element, than take unique items and join them with comma.

Ansible:how to adapt the output format of map (with extract) filters

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