Ansible regex_replace或regex_search

Question

我正在嘗試將以下輸出中的“ OK”與正則表達式進行匹配，並將其存儲在變量中：

System 'server.mylabserver.com'
  status                       OK
  monitoring status            Monitored
  monitoring mode              active
  on reboot                    start
  load average                 [0.00] [0.01] [0.05]
  cpu                          0.1%us 0.1%sy 0.0%wa
  memory usage                 367.9 MB [20.0%]
  swap usage                   0 B [0.0%]
  uptime                       2h 10m
  boot time                    Mon, 02 Apr 2018 06:51:01
  data collected               Mon, 02 Apr 2018 09:01:02

我嘗試過的帶有“ regex_replace”的Ansible代碼：

  - name: Fetch the monit status
    shell: "monit status | tail -n +3"
    register: monit_status_raw
    tags: basic_monitoring
  - name: Extract monit variables
    set_fact:
        vmstatus: "{{ monit_status_raw | regex_replace('^\s\s([a-z]*)\s+', '\\1:')}}"

錯誤：

The offending line appears to be:

    set_fact:
       vmstatus: "{{ monit_status_raw | regex_replace('^\s\s([a-z]*)\s+', '\\1')}}"
                                                        ^ here
We could be wrong, but this one looks like it might be an issue with
missing quotes.  Always quote template expression brackets when they
start a value. For instance:

    with_items:
      - {{ foo }}

Should be written as:

    with_items:
      - "{{ foo }}"

我嘗試過的帶有“ regex_search”的Ansible代碼：

- name: Fetch the monit status
  shell: "monit status | tail -n +3"
  register: monit_status_raw
- name: Extract monit variables
  set_fact:
     vmstatus: "{{ monit_status_raw | regex_search('^\s\sstatus\s+(.*)$') }}"

錯誤：

The offending line appears to be:

    set_fact:
      vmstatus: "{{ monit_status_raw | regex_search('^\s\sstatus\s+(.*)$') }}"
                                                      ^ here
We could be wrong, but this one looks like it might be an issue with
missing quotes.  Always quote template expression brackets when they
start a value. For instance:

    with_items:
      - {{ foo }}

Should be written as:

    with_items:
      - "{{ foo }}"

知道正則表達式有什么問題嗎？

謝謝丹

Answer 1

我認為，如果您想使用regexp_search-您需要提供一個字符串並考慮轉義字符，然后需要使用以下構造：

with_items
  - "{{ monit_status_raw.stdout_lines }}"

但我認為這會更簡單：

- name: Fetch the monit status
  shell: 'monit status | tail -n +2 | grep "^\s*status" '
  register: monit_status_raw
- set_fact:
    vmstatus: "{{ monit_status_raw.stdout.split('status')[1]| replace(' ','')}}"

如果使用示例，將獲得vmstatus ='Ok'。