Ansible：如何在变量中查找单词出现？

Question

我到处搜索如何为 Ansible 查找变量中出现的单词，但没有找到。我找到的最接近的方法是在变量中搜索任何 'word' 但它不计算那里有多少个单词并且只返回布尔值。这是我的剧本：

---

- hosts: localhost
  name: Test Variable Manipulation and Searching
  gather_facts: false
  tasks:
    - name: read the Output File
      set_fact: 
        output: "{{lookup('file', 'inputFile.txt') }}"

    - name: debug the input file
      debug:
        msg: "{{output.stdout}}"

    - name: find word 'down'
      debug:
        msg: "Found the word 'down' in the Variables/Output"
      when: output.stdout is search('down')

这是inputFile.txt内容：

{"failed": false, "changed": false, "ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "stdout_lines": [["Gi1/0/14                       down           down"]], "stdout": ["Gi1/0/14                       down           down"]}

这是上述剧本的结果：

有什么方法可以调整此脚本以满足我的目的吗？我需要计算变量中有多少个单词 'down' 。

我已经尝试使用 regex_findall 以及如下所示：

      - name: check the down Status if EQUAL to 2
      block:
        - name: check the down Status if EQUAL to 2
          debug:
            msg: "Both Status is down. Check is clear"
          when: (output.stdout|regex_findall('down')|length) == 2
      rescue:
        - debug:
            msg: "Unable to use the regex_findall to desResult"

如果用于普通字符串没问题，但在这种情况下我会收到模板错误，我不知道为什么：

fatal: [localhost]: FAILED! => {"msg": "The conditional check '(output.stdout|regex_findall('down')|length) == 2' failed. The error was: Unexpected templating type error occurred on ({% if (output.stdout|regex_findall('down')|length) == 2 %} True {% else %} False {% endif %}): expected string or bytes-like object\n\nThe error appears to be in 'switchCheck.yml': line 17, column 11, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n      block:\n        - name: check the down Status if EQUAL to 2\n          ^ here\n"}

Answer 1

$ cat test.yml
- hosts: localhost
  name: Test Variable Manipulation and Searching
  gather_facts: false
  tasks:
    - name: read the Output File
      set_fact:
        output: "{{lookup('file', 'inputFile.txt') }}"

    - name: debug the input file
      debug:
        msg: "{{ output | regex_findall('down') | length }}"
      when: (output | regex_findall('down') | length) == 3

$ cat inputFile.txt
Gi1/0/14 down down go down

output 是一个变量，它没有stdout 属性，所以只是{{ output }}，如果您有进一步的问题，请告诉我。

Answer 2

新的过滤器插件 community.general.counter 是解决您问题的另一种方法。它在 ansible>=5.2

中可用

$ pip freeze | grep ansible
ansible==5.4.0
ansible-core==2.12.2

$ cat test.yml
---
- hosts: localhost
  gather_facts: false
  tasks:
    - name: word occurence in string
      set_fact:
        counter: "{{ lookup('file', 'inputFile.txt') | split | community.general.counter }}"

    - debug:
        var: counter

    - debug:
        msg: "{{ counter['down'] }}"


$ ansible-playbook test.yml
PLAY [localhost] **********************

TASK [word occurence in string] *******
ok: [localhost]

TASK [debug] **************************
ok: [localhost] => {
    "counter": {
        "Gi1/0/14": 1,
        "down": 2
    }
}

TASK [debug] **************************
ok: [localhost] => {
    "msg": "2"
}

filter documentation

Ansible：如何在变量中查找单词出现？

Ansible: How to find word occurrence in a variable?

regex

search

count

ansible

find-occurrences