CODEWITHSUNDEEP
loopsyamlansiblejinja2
Blake
Blake

Reputation: 131

Nested Loop In An Ansible Jinja Template

I'm using ansible to build some swatch conf files, trying to make it as flexible as possible to allow for different actions. I'm stuck on a nested loop in the .j2 file. I have the Ansible vars like so:

swatch_files:
  - name: 'syslog'
    tail: '/var/log/syslog'
    watchfor:
      -
        string: 'Stupid FIrst String'
        actions:
          -
            action: "1/2 Slack blah blah action"
            threshold: "Threshold For This first Action"
        actions:
          -
            action: "2/2 Slack blah blah action"
            threshold: "Threshold For This second Action"
      -
        string: 'Crappy Second String'
        actions:
          -
            action: "1/2 Slack blah blah action"
            threshold: "Threshold For This 1 Action"
        actions:
          -
            action: "2/2 Slack blah blah action"
            threshold: "Threshold For This 2 Action"

The task does indeed create the file:

- name: Swatch | Create the Monit swatch conf files   template:
    src="swatch.monit.j2"
    dest="/etc/monit/conf.d/{{ item.name }}.conf"
    owner=root
    group=root
    mode=0700   with_items: swatch_files   tags:
    - monit

And my swatch.conf.j2 file looks like this:

{% for watchfor in item.watchfor recursive %}
   watchfor /{{ watchfor.string }}/
{% for actions in watchfor.actions %}
        Action: {{ actions.action }}
        Threshold: {{ actions.threshold }}
{% endfor %}
{% endfor %

But my /etc/swatch/syslog.conf ends up like this:

   watchfor /Stupid FIrst String/
    Action: 2/2 Slack blah blah action
    Threshold: Threshold For This second Action

   watchfor /Crappy Second String/
    Action: 2/2 Slack blah blah action
    Threshold: Threshold For This 2 Action

It goes through the {% for watchfor in item.watchfor recursive %} loop fine, but then I have the {% for actions in watchfor.actions %} wrong somehow. It ends up only writing the second action and threshold. I assume it overwrites the first?

Upvotes: 1

Views: 1329

Answers (1)

udondan
udondan

Reputation: 60059

Looks like a pure YAML problem. You are overriding the key actions in your dict:

watchfor:
  -
    string: 'Stupid FIrst String'
    actions:
      -
        action: "1/2 Slack blah blah action"
        threshold: "Threshold For This first Action"
    actions:
      -
        action: "2/2 Slack blah blah action"
        threshold: "Threshold For This second Action"

If your actions list should have multiple items it should look like this:

watchfor:
  - string: 'Stupid FIrst String'
    actions:
      - action: "1/2 Slack blah blah action"
        threshold: "Threshold For This first Action"
      - action: "2/2 Slack blah blah action"
        threshold: "Threshold For This second Action"

Upvotes: 1

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