Loop issue with nested variable and dict

[R. Dikkes]

Hi, 

I am trying to do the following: 

Consul-template needs to generate a haproxy config, the consul template i want to be dynamic filled with Ansible. 

The consul template however is a Go template and unfortunately Go uses the brackets yaml uses. To be able to build a Go template ansible templates i am putting the Go syntax in a variable. 

My whole idea is to place all applications that i want consul to generate templates for in a variable file, and let these variables be used in a template i generate to generate the Go template for consul.

I got most of it to work, except for the fact that the variable is looping over the template instead of within the template. I suspect i need to do it all different. 

The task file main.yml: 

---

- include_vars: apps.yml

- name: "Place the Consul Template for haproxy"

  template: src=haproxy.ctmpl.yml dest=/etc/haproxy/haproxy-template.ctmpl owner=consul group=consul mode=0644

  with_dict: apps_gen

  when: "'load_balancer' in {{ group_names }}"

 

***

The vars file apps.yml:

---

apps_gen:

  app_bridge:

    name: bridge-webapp

  app_bridge2:

    name: bridge-webapp2

****

The defaults file: 

--- 

consul_template_haproxy: 

  - name: '# Frontend {{ item.value.name }}'

    config: 

       - {{ item.value.name }}_acl

consul_template_backend:

  - name: 'backend {{ item.value.name }}'

    config: 

      - mode http{{'{{'}}range service "{{ item.value.name }}"{{'}}'}}

      - server {{'{{'}}.Node{{'}}'}} {{'{{'}}.Address{{'}}'}}:{{'{{'}}.Port{{'}}'}} check{{'{{'}}end{{'}}'}}

***

The template file haproxy.ctmpl.yml:

---

{% for value in apps_gen %}

  {% for value in consul_template_frontend %}

   {{value.name}}

      {% for config in value.config %}

      {{config}}

      {% endfor %}

  {% endfor %}

{% endfor %}

{% for value in apps_gen %}

  {% for value in consul_template_backend %}

   {{value.name}}

      {% for config in value.config %}

      {{config}}

      {% endfor %}

  {% endfor %}

{% endfor %}

****

The result: 

      # Frontend bridge-webapp

            bridge-webapp_acl

              # Frontend bridge-webapp

            bridge-webapp_acl

     backend bridge-webapp

            mode http {{range service "bridge-webapp"}}

            server {{.Node}} {{.Address}}:{{.Port}} check{{end}}

             backend bridge-webapp

            mode http {{range service "bridge-webapp"}}

            server {{.Node}} {{.Address}}:{{.Port}} check{{end}}

The result i expected: 

     backend bridge-webapp

            mode http {{range service "bridge-webapp"}}

            server {{.Node}} {{.Address}}:{{.Port}} check{{end}}

     backend bridge-webapp2

            mode http {{range service "bridge-webapp2"}}

            server {{.Node}} {{.Address}}:{{.Port}} check{{end}}

What i see is that the loop is going over the template when i run the playbook, while i expected it to be within the template: 

changed: [loadbalancer] => (item={'key': 'app_bridge2', 'value': {'name': 'bridge-webapp2'}}) => {"changed": true... 

changed: [loadbalancer] => (item={'key': 'app_bridge', 'value': {'name': 'bridge-webapp'}}) => {"changed": true...

Can anyone help me? Im a bit lost, i really appreciate any help! I am currently thinking about registering the results and use that as a variable in the template, but it feels like im starting to play the lead role in Inception. This does not help readability

[Dick Davies]

I hit the exact same problem, and someone on IRC pointed me at {% raw
%}....{% endraw %}

http://jinja.pocoo.org/docs/dev/templates/#escaping

[R. Dikkes]

But that would leave alone my Go template language right? It wouldn't solve the looping over instead of inside the template, am i correct?

Thank you for your answer! :)

[R. Dikkes]

Issue solved. :)