Re: [ansible-project] Lineinfile - Skip/Update an item inside "with_items" using conditions

[Todd Lewis]

    - name: "Update Redis Parameters in {{ redis_config_path }}"
      lineinfile:
        path: "{{ redis_config_path }}"
        backrefs: yes
        regexp: "{{ item.regexp }}"
        line: "{{ item.line }}"
      when: item.line is match(omit)
      with_items:
        - { regexp: '^maxmemory',     line: "maxmemory {{ MAX_MEM | d(omit) 
}}mb" }
        - { regexp: '^tcp-keepalive', line: "tcp-keepalive {{ TCP_KEEPALIVE | 
d(omit) }}" }
        - { regexp: '^tcp-backlog',   line: "tcp-backlog {{ TCP_BACKLOG | d(omit) 
}}" }
        - { regexp: '^maxclients',    line: "maxclients {{ MAX_CLIENTS | d(omit) 
}}" }
        - { regexp: '^timeout',       line: "timeout {{ TIMEOUT }}" }


On 8/5/22 7:31 AM, farrukh ahmed wrote:

Thanks for your reply Vladimir Botka.

This is my actual case:

 defaults > main.yml
---
# defaults file for redis_configs
redis_config_path: /etc/redis/redis.conf

# Default Params Values
MAX_MEM: 3000
TCP_KEEPALIVE: 0
TCP_BACKLOG: 511
MAX_CLIENTS: 15000
TIMEOUT: 1500


And this is:

Tasks > main.yml

---

- name: "Update Redis Parameters in {{ redis_config_path }}"
  lineinfile:
    path: "{{ redis_config_path }}"
  backrefs: yes
  regexp: "{{ item.regexp }}"
  line: "{{ item.line }}"
  with_items:

    - { regexp: '^maxmemory', line: "maxmemory {{ MAX_MEM }}mb", when: {{ MAX_MEM }} is defined }     - { regexp: '^tcp-keepalive', line: "tcp-keepalive {{ TCP_KEEPALIVE }}", when: {{ TCP_KEEPALIVE }} is defined }     - { regexp: '^tcp-backlog', line: "tcp-backlog {{ TCP_BACKLOG }}", when: {{ TCP_BACKLOG }} is defined}     - { regexp: '^maxclients', line: "maxclients {{ MAX_CLIENTS }}", when: {{ MAX_CLIENTS }} is defined}

    - { regexp: '^timeout', line: "timeout {{ TIMEOUT }}" }

I want this to check if each variable inside an item is defined then make the changes to the line in the file, otherwise skip only those items which variables is not defined. For Instance, If I comment out the variable MAX_MEM from the defaults > main.yml. like below:

# Default Params Values
##MAX_MEM: 3000
TCP_KEEPALIVE: 0
TCP_BACKLOG: 511
MAX_CLIENTS: 15000
TIMEOUT: 1500

Then the execution should skip changes to the line where MAX_MEM is undefined, and the rest lines should be changed as they defined.

Is it possible?


On Friday, August 5, 2022 at 2:18:05 PM UTC+5 vbo...@gmail.com wrote:

    On Thu, 4 Aug 2022 23:43:59 -0700 (PDT)
    farrukh ahmed <farrukha...@gmail.com> wrote:

    > with_items:
    > - { regexp: '^text1', line: "text1 = {{ VAR1 }}", when: VAR1 is
    defined }
    > - { regexp: '^text2', line: "text2 = {{ VAR2 }}" }
    > - { regexp: '^text3', line: "text3 = {{ VAR3 }}" }

    Set *default* to avoid errors, add attribute *def*, and select lines.
    For example,

    shell> cat pb.yml
    ---
    - hosts: localhost
    gather_facts: false
    vars:
    lines:
    - regexp: '^text1'
    line: 'text1 = {{ VAR1|d("undef") }}'
    def: '{{ VAR1 is defined }}'
    - regexp: '^text2'
    line: 'text2 = {{ VAR2|d("undef") }}'
    def: '{{ VAR2 is defined }}'
    - regexp: '^text3'
    line: 'text3 = {{ VAR3|d("undef") }}'
    def: '{{ VAR3 is defined }}'
    tasks:
    - debug:
    var: item
    loop: "{{ lines|selectattr('def') }}"

    gives

    shell> ansible-playbook pb.yml -e VAR1=test

    PLAY [localhost]
    *********************************************************************

    TASK [debug]
    *********************************************************************
    ok: [localhost] => (item={'regexp': '^text1', 'line': 'text1 = test',
    'def': True}) => ansible_loop_var: item item:
    def: true
    line: text1 = test
    regexp: ^text1

-- Vladimir Botka

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