With dict works a little differently than with_items.
with_items will return one item in the postgres_users list, one after
another, if it were a list of users.
postgres_users:
- name: boxey
db: cargo_ship
Now, when using with_dict, it works differently, returning keys as item.key
and values as item.value
http://docs.ansible.com/playbooks_loops.html#looping-over-hashes
I'd consider either passing a list as above or using with_dict, but noting
what it returns.
Meanwhile, this looks problematic:
template: src=pg_ident.conf.j2
dest=/etc/postgresql/9.3/main/pg_ident.conf owner=postgres group=postgres
mode=0640
Why?
You're evaluating it multiple times in a loop, but there is no variable in
the destination path. The result is you've re-templated the file many times.
I think you don't need the loop, and just need to simply reference
postgres_users as a variable in the template, and templating the file once
is fine.
But you can't use a simple for loop, because postgres_users is not a list.
Try:
{% for (key, value) in postgres_users.iteritems() %}
{% endfor %}
if you want to keep things as a hash/dictionary.
On Sat, Aug 16, 2014 at 7:38 AM, Matt Silverlock <[email protected]> wrote:
> Hi all,
>
> Trying to pull together my understanding of Jinja's looping constructs,
> Ansible's with_dict and from what I've seen out in the wild (i.e. on
> GitHub). I've taken a look around at some other examples but can't seem to
> adapt them to my approach (i.e.
> https://github.com/timmahoney/ansible-redhat-extra-repos/blob/master/defaults/main.yml
> is close to what I'm after)
>
> At the moment I'm attempting to loop over a YAML dict of OS user <-> DB
> user mappings (for pg_ident.conf) and am running into an error:
>
> *# host_vars/<hostname>*
> postgres_users:
> baltar:
> os: "{{ username }}"
> db: "{{ db_name }}"
> caprica:
> os: "{{ username }}"
> db: "{{ db_name }}"
>
> *# pg_ident.conf.j2*
>
> {% for user in postgres_users %}
> {{ user.db }} {{ user.os }} {{ user.key }}
> {% endfor %}
>
> *# roles/postgresql/tasks/postgres.yml*
>
> - name: copy postgres ident maps
> template: src=pg_ident.conf.j2
> dest=/etc/postgresql/9.3/main/pg_ident.conf owner=postgres group=postgres
> mode=0640
> register: postgres_ident
> with_dict: postgres_users
>
> *# error message*
>
> TASK: [postgres | copy postgres ident maps]
> ***********************************
> fatal: [default] => {'msg': "AnsibleUndefinedVariable: One or more
> undefined variables: 'str object' has no attribute 'db'", 'failed': True}
> fatal: [default] => {'msg': 'One or more items failed.', 'failed': True,
> 'changed': False, 'results': [{'msg': "AnsibleUndefinedVariable: One or
> more undefined variables: 'str object' has no attribute 'db'", 'failed':
> True}]}
>
> -----
>
> I've also attempted the below:
>
>
> *# host_vars/<hostname>*
> # same as before
>
> *# template*
> {% for k, v in item %}
> {{ v.db }} {{ v.os }} {{ k }}
> {% endfor %}
>
> *# task*
> # same as before
>
> This fails with "too many values to unpack".
>
> Which is the functional and favored approach? I'd rather the map keys be
> the names but can't seem to get this to work.
>
>
>
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