I'm curious how these notions caught on that very clearly expressed
shell expressions are inherently "bad", and that unfathomably complex
jinja2 expressions are inherently "better".
I seriously doubt you're going to find a more maintainable, all-Ansible
expression to accomplish what you're doing.
However, I would suggest a couple alterations.
(A) I'd make that "changed_when:" into a "failed_when:", and
(B) I'd add "changed_when: false" (because it doesn't ever change anything).
(C) I might also add a "vars:" to your set_fact task that maps
"location[XYZ]" to your smtp.conf expressions:
vars:
locmap:
locationX: snmpd.conf-X
locationY: snmpd.conf-Y
locationZ: snmpd.conf-Z
Then your set_fact becomes "snmpd_conf: '{{
locmap[grep_result.stdout_lines[0]] }}'
That way you don't have to change "code" to update your location map data.
On 3/7/24 11:02 AM, Alex Wanderley wrote:
Hello,
(And apologies if this is something too trivial...)
I have a working playbook that searches and collects a string from a
file and, based on that string, sets another variable.
But I'm retrieving the string using grep/awk:
- name: Collect server location
ansible.builtin.shell: "/bin/grep {{ inventory_hostname }} {{
server_list_file }} | /bin/awk '{print $3}'"
register: grep_result
changed_when: ( grep_result.rc != 0 )
"{{ server_list_file }}" points to a file that looks like this:
serverA flavor locationX owner
serverB flavor locationY owner
serverC flavor locationZ owner
For completeness, this is how I'm using "grep_result":
- name: Set snmpd config file
ansible.builtin.set_fact:
snmpd_conf: "{% if grep_result.stdout == 'locationX' %}snmpd.conf-X\
{% elif grep_result.stdout == 'locationY' %}snmpd.conf-Y\
{% else %}snmpd.conf-Z\
{% endif %}"
How could I, as simply as using the command/shell modules, accomplish
the same results without resourcing to shell commands?
Thanks a lot,
Alex
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