REGEX (regex_search) 就像 Linux EGREP - 使用多模式/范围使用一个 with_items 循环显示模式匹配行（带空格）

问题描述 投票：0回答：2

Ansible / ansible-playbook 2.9.27

我有以下剧本，我只想显示那些与给定的multi“egrep”类似模式匹配的行（来自数据结构（即列表-->with_items循环）（例如：“pattern1|”）模式2|模式3withRange[0-9a-zA-Z]”）。

我怎样才能纯粹在 Ansible 中实现这一目标，可能只使用一个 with_items / 循环？

那就太好了：

  • 如果我不必使用N则不行。嵌套循环（每个模式/字符串）--或--
  • 我不必使用 shell 单行代码（egrep "string|ab.*yz|giga"）。

这是我的剧本：

aks.yml

---
- hosts: localhost
  become: yes
  remote_user: root
  become_user: root
  pre_tasks:
  - name: show pattern matching lines
    #command: 'echo {{ item }} | egrep -i "r[0-9]|goga"'
    ansible.builtin.debug:
      var: "{{ item }}"
    when: ( item | regex_search('r0[0-9]|goga', ignorecase=True))
    with_items:
      - "ar00n_giga"
      - "Schnooka_goga"
      - "lorito_r01_gigaFifa"

运行剧本给了我：

$ ansible-playbook aks.yml

[WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost does not match 'all'

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

TASK [Gathering Facts] *******************************************************************************************************************************************************************************************
ok: [localhost]

TASK [show pattern matching lines] *******************************************************************************************************************************************************************************
ok: [localhost] => (item=ar00n_giga) => {
    "ansible_loop_var": "item", 
    "ar00n_giga": "VARIABLE IS NOT DEFINED!", 
    "item": "ar00n_giga"
}

skipping: [localhost] => (item=Schnooka_goga) 

ok: [localhost] => (item=lorito_r01_gigaFifa) => {
    "ansible_loop_var": "item", 
    "item": "lorito_r01_gigaFifa", 
    "lorito_r01_gigaFifa": "VARIABLE IS NOT DEFINED!"
}

PLAY RECAP *******************************************************************************************************************************************************************************************************
localhost                  : ok=2    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

我注意到“范围”[0-9]

和多模式，即在
|
中使用
regex_search(...)
有效！

    使用范围
  • r0[0-9]
    成功捕获包含
    r00和r01的项目字符串，这很棒。
    • 使用
  • ...|goga
    （它也捕获第二行，它没有
    r0[0-9]
    模式。
但是如果我的值在 with_items: 循环中包含空格，即如果我添加以下内容，则上述代码不起作用：

with_items: - "ar00n_giga" - "new goga shooga" - "Schnooka_goga" - "lorito_r01_gigaFifa" 
然后，我收到以下错误消息：


...
TASK [show pattern matching lines] *******************************************************************************************************************************************************************************
ok: [localhost] => (item=ar00n_giga) => {
    "ansible_loop_var": "item", 
    "ar00n_giga": "VARIABLE IS NOT DEFINED!", 
    "item": "ar00n_giga"
}
fatal: [localhost]: FAILED! => {"msg": "template error while templating string: expected token 'end of print statement', got 'goga'. String: {{new goga shooga}}"}

PLAY RECAP *******************************************************************************************************************************************************************************************************
localhost                  : ok=1    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0   

    



    
    regex
    
    loops
    
    ansible
    
    grep
    
    ansible-2.x
    
    
2个回答

    

      
      
      

        

          

            

              
1
投票

              
            

          

        

        
迭代选定的列表更容易。例如，给定列表


  data_raw:
    - ar00n_giga
    - new goga shooga
    - Schnooka_goga
    - lorito_r01_gigaFifa



  1. 搜索模式 'r0[0-9]|goga'

    2. 

  data_sel: "{{ data_raw|
                select('search', 'r0[0-9]|goga', ignorecase=true) }}"

给出所有时间，因为：




    搜索“r0[0-9]”选择第一项和最后一项，然后
  • 

    • 搜索“goga”选择第二项和第三项
  • 

    • 

  data_sel:
  - ar00n_giga
  - new goga shooga
  - Schnooka_goga
  - lorito_r01_gigaFifa



    更改第二个模式 'r0[0-9]|new'
  1. 

    2. 

  data_sel: "{{ data_raw|
                select('search', 'r0[0-9]|new', ignorecase=true) }}"

第三项未被选中


  data_sel:
  - ar00n_giga
  - new goga shooga
  - lorito_r01_gigaFifa




用于测试的完整剧本示例


- hosts: localhost

  vars:

    data_raw:
      - ar00n_giga
      - new goga shooga
      - Schnooka_goga
      - lorito_r01_gigaFifa

    data_sel1: "{{ data_raw|
                   select('search', 'r0[0-9]|goga', ignorecase=true) }}"
    data_sel2: "{{ data_raw|
                   select('search', 'r0[0-9]|new', ignorecase=true) }}"
                
  tasks:

    - debug:
        var: data_sel1
    - debug:
        var: data_sel2


    


      

      
      
      

      

        

          

            

              
0
投票

              
            

          

        

        
在带有来自 Red Hat 分发渠道的 Ansible 的 RHEL 7.9 上


ansible --version
ansible 2.9.27
...
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.5 (default, May 30 2023, 03:38:55) [GCC 4.8.5 20150623 (Red Hat 4.8.5-44)]

一个最小的示例手册


---
- hosts: localhost
  become: false
  gather_facts: false

  vars:

    ITEMS:
      - "ar00n_giga"
      - "new goga shooga"
      - "Schnooka_goga"
      - "lorito_r01_gigaFifa"

  tasks:

  - name: Show pattern matching lines
    debug:
      msg: "{{ item }}"
    when: ( item | regex_search('r0[0-9]|goga', ignorecase=True))
    loop: "{{ ITEMS }}"

  - name: Show pattern matching lines
    debug:
      var: item
    when: ( item | regex_search('r0[0-9]|goga', ignorecase=True))
    loop: "{{ ITEMS }}"

  - name: Show pattern matching lines
    debug:
      var: item
    when: ( item | regex_search('r0[0-9]|goga', ignorecase=True))
    with_items:
      - "ar00n_giga"
      - "new goga shooga"
      - "Schnooka_goga"
      - "lorito_r01_gigaFifa"

将产生
的输出

TASK [Show pattern matching lines] *************
ok: [localhost] => (item=ar00n_giga) =>
  msg: ar00n_giga
ok: [localhost] => (item=new goga shooga) =>
  msg: new goga shooga
ok: [localhost] => (item=Schnooka_goga) =>
  msg: Schnooka_goga
ok: [localhost] => (item=lorito_r01_gigaFifa) =>
  msg: lorito_r01_gigaFifa

TASK [Show pattern matching lines] *************
ok: [localhost] => (item=ar00n_giga) =>
  ansible_loop_var: item
  item: ar00n_giga
ok: [localhost] => (item=new goga shooga) =>
  ansible_loop_var: item
  item: new goga shooga
ok: [localhost] => (item=Schnooka_goga) =>
  ansible_loop_var: item
  item: Schnooka_goga
ok: [localhost] => (item=lorito_r01_gigaFifa) =>
  ansible_loop_var: item
  item: lorito_r01_gigaFifa

TASK [Show pattern matching lines] *************
ok: [localhost] => (item=ar00n_giga) =>
  ansible_loop_var: item
  item: ar00n_giga
ok: [localhost] => (item=new goga shooga) =>
  ansible_loop_var: item
  item: new goga shooga
ok: [localhost] => (item=Schnooka_goga) =>
  ansible_loop_var: item
  item: Schnooka_goga
ok: [localhost] => (item=lorito_r01_gigaFifa) =>
  ansible_loop_var: item
  item: lorito_r01_gigaFifa

与从 Python Package Index (PyPI) 安装的 RHEL 7.9 和 Ansible 的结果相同


```bash
ansible --version
...
ansible [core 2.11.12]
...
  python version = 2.7.5 (default, May 30 2023, 03:38:55) [GCC 4.8.5 20150623 (Red Hat 4.8.5-44)]
  jinja version = 2.11.3
  libyaml = True

简而言之，我无法重现错误（注释：不断）。




您收到的错误消息


fatal: [localhost]: FAILED! => {"msg": "template error while templating string: expected token 'end of print statement', got 'goga'. String: {{new goga shooga}}"}

 是由 
debug
 任务中的错误语法引起的，使用了 


var: "{{ item }}"

而不是


var: item

或


msg: "{{ item }}"

    



      

      
    

  

  

    
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