dynamic variable help

[Manoj Chander]

Hi , 

Im a newbie learnig ansible .im stuck with the below 

I need to get input from user and based on input  dynamically create a url .

input group1 is a single value and  group2 is a list 

using  with_items and loop im able to create variable but couldnt register it and  pass it to get_url module . below is one of my failed attempts .

ansible-playbook -e "app_name=group1 or app_name=group2 ...."

---

- name: Block to Deploy on Servers

  block:

        - set_fact:

     artifact_url: "https://my.url"

        - set_fact:

             group_id: "{% if app_name == 'group1' %}/com/connectors/{% elif app_name == 'group2' %}

             /com/connectors/{% else %}/com/services/{% endif %}"

             register: group_id 

 

   - set_fact:

            artifacturl: "{ artifact_url }}{{ group_id }}{{ item }}/{{ app_version }}/{{ item }}-{{ app_version }}.jar"

when: app_name == group2

loop:

   - jar1

   - jar2 

register: artifacturl

   - set_fact:

            artifacturl: "{ artifact_url }}{{ group_id }}{{ app_name }}/{{ app_version }}/{{ app_name }}-{{ app_version }}.jar"

            when: app_name != group2

pass the constructed variable to another block 

- name: Block to get file "{{app_name}}"

  block:

        - name: download "{{app_name}}" form url

          get_url:

            url:  "{{ artifacturl }}"

            dest: "/manual/{{ app_name }}.jar"

  loop:

     - {{ artifacturl }}

[André Oswald]

Hi,

for this to work artifacturl always needs to be a list. A first attempt could look like this:

---

- name: Block to Deploy on Servers

  block:

        - set_fact:

     artifact_url: "https://my.url"

        - set_fact:

             group_id: "{% if app_name == 'group1' %}/com/connectors/{% elif app_name == 'group2' %}

             /com/connectors/{% else %}/com/services/{% endif %}"

             register: group_id 

 

   - set_fact:

            artifacturls: 

            - "{ artifact_url }}{{ group_id }}jar1/{{ app_version }}/{{ item }}-{{ app_version }}.jar"

            - "{ artifact_url }}{{ group_id }}jar2/{{ app_version }}/{{ item }}-{{ app_version }}.jar"

      when: app_name == group2

 

   - set_fact:

            artifacturls: 

             - "{ artifact_url }}{{ group_id }}{{ app_name }}/{{ app_version }}/{{ app_name }}-{{ app_version }}.jar"

      when: app_name != group2

pass the constructed variable to another block 

- name: Block to get file "{{app_name}}"

  block:

        - name: download "{{app_name}}" form url

          get_url:

            url:  "{{ item }}"

            dest: "/manual/{{ app_name }}.jar"

  loop:

     - {{ artifacturls }}

This leads to a bit of duplication for group2 which could be omitted by a more complex construct like this:

   - set_fact:

            artifacturls: "({{ artifact_urls | default([]))  + {{ artifact_url }}{{ group_id }}{{ item }}/{{ app_version }}/{{ item }}-{{ app_version }}.jar"

      when: app_name == group2

      loop:

      - jar1

      - jar2 

Hope that helps,

André

[Manoj Chander]

Greetings  André,

Thanks you so much for ur time. 

The above solution works but i have some 100 jars to download .

Is it possible  to set_fact  in a loop store the constructed variable  in a list and pass it to  get_url  method .  

---

- include_vars:

   file: vars.yml

- set_fact:

    b_url: http://{{item}}/sr/pr/

 # jar is a list in vars.yml

 loop: "{{ jars }}" 

 register: b_url 

- debug:

    msg: "no of sites are ==>   {{ b_url  }}  "

- name: Container Checks

 block:

       - name: download "{{file }}"

         get_url:

           url:  "{{ item }}"

           dest: "/manual/jar/"

   loop: {{b_url}}

regards,

Manoj

[Stefan Hornburg (Racke)]

On 5/24/21 3:46 PM, Manoj Chander wrote:
> Greetings  André,
>
> Thanks you so much for ur time. 
>
> The above solution works but i have some 100 jars to download .
>

> Is it possible  to set_fact  in a loop store the constructed variable  in a list and pass it to  *get_url*  method .  

>
> ---
> - include_vars:
>    file: vars.yml
> - set_fact:
>     b_url: http://{{item}}/sr/pr/
>  # jar is a list in vars.yml
>  loop: "{{ jars }}" 
>  register: b_url 
> - debug:
>     msg: "no of sites are ==>   {{ b_url  }}  "
> - name: Container Checks
>  block:
>        - name: download "{{file }}"
>          get_url:
>            url:  "{{ item }}"
>            dest: "/manual/jar/"
>    loop: {{b_url}}
>

Hello Manoj,

1) Using register in a set_fact task doesn't make sense, as set_fact is supposed to set the
variables.

2) Do you really need to use set_fact?

- name: download "{{file }}"
get_url:

url: "http://{{item}}/sr/pr/"
dest: "/manual/jar/"
loop: "{{ jars }}"

Regards
Racke

> regards,
> Manoj
>
> On Friday, May 21, 2021 at 11:39:29 AM UTC+5:30 André Liebigt wrote:
>
> Hi,
>
> for this to work artifacturl always needs to be a list. A first attempt could look like this:
>

> *---*
> *- name: Block to Deploy on Servers*
> *  block:*
> *        - set_fact:*
> *     artifact_url: "https://my.url <https://my.url/>"*
> *        - set_fact:*
> *
> *
> *             group_id: "{% if app_name == 'group1' %}/com/connectors/{% elif app_name == 'group2' %}*
> *             /com/connectors/{%
else %}/com/services/{% endif %}"*
> *             register: group_id *
> * *
> *   - set_fact:*
> *            artifacturls: *
> *            - "{ artifact_url }}{{ group_id }}jar1/{{ app_version }}/{{ item }}-{{ app_version }}.jar"*
> *            **- "{ artifact_url
}}{{ group_id }}jar2/{{ app_version }}/{{ item }}-{{ app_version }}.jar"*
> *      when: app_name == group2*
> * *
> **
> *   - set_fact:*
> *            artifacturls: *
> *             - "{ artifact_url }}{{ group_id }}{{ app_name }}/{{ app_version }}/{{ app_name }}-{{ app_version }}.jar"*
> *      when: app_name != group2*
>
> /pass the constructed variable to another block /
>
> *- name: Block to get file "{{app_name}}"*
> *  block:*
> *        - name: download "{{app_name}}" form url*
> *          get_url:*
> *            url:  "{{ item }}"*
> *            dest: "/manual/{{ app_name }}.jar"*
> *  loop:*
> *     - {{ artifacturls }}*

>
> This leads to a bit of duplication for group2 which could be omitted by a more complex construct like this:
>

> *   - set_fact:*
> *            artifacturls: "({{ artifact_urls | default([]))  + {{ artifact_url }}{{ group_id }}{{ item }}/{{
> app_version }}/{{ item }}-{{ app_version }}.jar"*
> *      when: app_name == group2*
> *      loop:*
> *      - jar1*
> *      - jar2 *
> *
> *
>
> Hope that helps,*
> *

> André
> On Thursday, May 20, 2021 at 12:43:07 PM UTC+2 cmanoj....@gmail.com
wrote:
>
>
> Hi , 
>
> Im a newbie learnig ansible .im stuck with the below 
>
>

> /I need to get input from user and based on input  dynamically create a url ./
> /
> /
> /input group1 is a single value and  group2 is a list /
> /
> /
> /using  with_items and loop im able to create variable but

couldnt register it and  pass it to get_url module .

> below is one of my failed attempts ./
> /
> /
> /ansible-playbook -e "app_name=group1 or app_name=group2 ...."/
>
> *---*
> *- name: Block to Deploy on Servers*
> *  block:*
> *        - set_fact:*
> *     artifact_url: "https://my.url <https://my.url>"*
> *        - set_fact:*
> *
> *
> *             group_id: "{% if app_name == 'group1' %}/com/connectors/{% elif app_name == 'group2' %}*
> *             /com/connectors/{% else %}/com/services/{% endif %}"*
> *             register: group_id *
> * *
> *   - set_fact:*
> *            artifacturl: "{ artifact_url }}{{ group_id }}{{ item }}/{{ app_version }}/{{ item }}-{{ app_version
> }}.jar"*
> *when: app_name == group2*
> *loop:*
> *   - jar1*
> *   - jar2 *
> *register: artifacturl*
> **
> *   - set_fact:*
> *            artifacturl: "{ artifact_url }}{{ group_id }}{{ app_name }}/{{ app_version }}/{{ app_name }}-{{
> app_version }}.jar"*
> *            when: app_name != group2*
>
> /pass the constructed variable to another block /
>
> *- name: Block to get file "{{app_name}}"*
> *  block:*
> *        - name: download "{{app_name}}" form url*
> *          get_url:*
> *            url:  "{{ artifacturl }}"*
> *            dest: "/manual/{{ app_name }}.jar"*
> *  loop:*
> *     - {{ artifacturl }}*
>
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--
Ecommerce and Linux consulting + Perl and web application programming.
Debian and Sympa administration. Provisioning with Ansible.

[Manoj Chander]

Hi racker, 

Yeah I understood ,I finally found a way to use loop and loop_var to build my list of variable and download them . 

Thanks for Ur help really appreciate it .

Regards,

Mano

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