Ansible 将标准输出与变量进行比较

Question

I have a questions since I am giving crazy. I want to compare stdout result to one variable storaged in my vars file. For instance, instead of using the variable but the string ( The IP 22.22.2.2), it works:

Nets.yml

- List_nets_find: 
  - host 22.22.2.2

Playbook:

---
- name: Black List
  hosts: routers
  gather_facts: false
  vars_files:
   - vars/Nets.yml

  tasks:    

   - name: Check the object-group
     ios_command:
      commands: 
       - command: "show object-group BLOCK-LIST" 
     register: output
     tags:
     - see
   - debug:
      msg: included
     when: output.stdout is search('22.22.2.2')
     tags:
     - see

Result:

TASK [debug] **************************************************************************************************************************************************************************************
skipping: [Router1]
ok: [Router3] => {
    "msg": "included"
}
ok: [Router2] => {
    "msg": "included"
}

But instead of using the string, I use the Variable, it does not work.

- name: Black List
  hosts: routers
  gather_facts: false
  vars_files:
   - vars/Nets.yml

  tasks:    

   - name: Check the object-group
     ios_command:
      commands: 
       - command: "show object-group BLOCK-LIST" 
     register: output
     tags:
     - see
   - debug:
      msg: included
     when: output.stdout is search('{{List_net_find}}')
     tags:
     - see

This is the error:

fatal: [Router1]: FAILED! => {"msg": "The conditional check 'output.stdout is search('{{List_net_find}}')' failed. The error was: error while evaluating conditional (output.stdout is search('{{List_net_find}}')): 'List_net_find' is undefined\n\nThe error appears to be in '/home/ansible/Ios_ACL_LAB/object-group.yml': line 23, column 10, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n         - see\n       - debug:\n         ^ here\n"}
fatal: [Router3]: FAILED! => {"msg": "The conditional check 'output.stdout is search('{{List_net_find}}')' failed. The error was: error while evaluating conditional (output.stdout is search('{{List_net_find}}')): 'List_net_find' is undefined\n\nThe error appears to be in '/home/ansible/Ios_ACL_LAB/object-group.yml': line 23, column 10, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n         - see\n       - debug:\n         ^ here\n"}
fatal: [Router2]: FAILED! => {"msg": "The conditional check 'output.stdout is search('{{List_net_find}}')' failed. The error was: error while evaluating conditional (output.stdout is search('{{List_net_find}}')): 'List_net_find' is undefined\n\nThe error appears to be in '/home/ansible/Ios_ACL_LAB/object-group.yml': line 23, column 10, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n         - see\n       - debug:\n         ^ here\n"}

Any suggestion? or other way to do it?

Thanks so much!

Answer 1

Your vars/Nets.yml does not declare a variable named List_nets_find , it declares an anonymous list whose first element is a dict whose only key is named List_nets_find

If you want a variable named that, then change - List_nets_find: to be List_nets_find:

---

Separately, the next question you are going to ask is "why does my search not match anything" and that's because List_nets_find is a list of str, so you will want to change that test to be output.stdout is search(List_nets_find | map("regex_escape") | join("|")) , using the regex_escape filter to turn those strings into something that can be safely fed into a search alternation