Ansible：根据分隔符拆分字符串

huangapple
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英文:

Ansible : Splitting a string based on delimiter

问题

  1. 我在ansible变量中有以下字符串，xyz
  3. xyz = " /u01/dbbackup_nfs/orabackups/odaserver-c/database/857970682/akash_2/db"
  5. 我想将这个字符串分割，直到停在orabackups，然后将变量abc的值设置为如下。
  7. ```yaml
  8. set_fact:
  9.   abc: " /u01/dbbackup_nfs"

对此的任何建议将非常有帮助。

  2. <details>
  3. <summary>英文:</summary>
  5. I have the following string in an ansible variable, xyz

xyz = "/u01/dbbackup_nfs/orabackups/odaserver-c/database/857970682/akash_2/db"

  1. I want to split this string such that I stop at orabackups and do a set_fact of the variable abc , such that abc will have the following value.

set_fact:
abc: "/u01/dbbackup_nfs"

  1. Any suggestions on this would be really helpful
  3. </details>
  6. # 答案1
  7. **得分**: 1
  9. 以下是翻译的部分：
  11. ```yaml
  12.   abc: &quot;/{{ xyz.split(&#39;/&#39;)[1:3]|join(&#39;/&#39;) }}&quot;

给出了你想要的结果

  1.   abc: /u01/dbbackup_nfs

<hr>

<sup>

Q: "我需要从第一个斜杠(/)开始，所以我将其更改为xyz.split(&#39;/&#39;)[0:3]|join(&#39;/&#39;)"

A: 这取决于路径是绝对路径还是相对路径。如果不确定，可以使用条件语句

  1.   abc: |
  2.     {% if xyz[0] == &#39;/&#39; %}
  3.     /{{ xyz.split(&#39;/&#39;)[1:3]|join(&#39;/&#39;) }}
  4.     {% else %}
  5.     /{{ xyz.split(&#39;/&#39;)[0:2]|join(&#39;/&#39;) }}
  6.     {% endif %}

用于测试的Playbook

  1. - hosts: localhost
  3.   vars:
  5.     abc: |
  6.       {% if xyz[0] == &#39;/&#39; %}
  7.       /{{ xyz.split(&#39;/&#39;)[1:3]|join(&#39;/&#39;) }}
  8.       {% else %}
  9.       /{{ xyz.split(&#39;/&#39;)[0:2]|join(&#39;/&#39;) }}
  10.       {% endif %}      
  12.   tasks:
  14.     - debug:
  15.         msg: &quot;{{ xyz.split(&#39;/&#39;)|to_yaml }}&quot;
  16.       vars:
  17.         xyz: &quot;u01/dbbackup_nfs/orabackups/odaserver-c/database/857970682/akash_2/db&quot;
  19.     - debug:
  20.         msg: &quot;{{ xyz.split(&#39;/&#39;)|to_yaml }}&quot;
  21.       vars:
  22.         xyz: &quot;/u01/dbbackup_nfs/orabackups/odaserver-c/database/857970682/akash_2/db&quot;
  24.     - debug:
  25.         var: abc
  26.       vars:
  27.         xyz: &quot;u01/dbbackup_nfs/orabackups/odaserver-c/database/857970682/akash_2/db&quot;
  29.     - debug:
  30.         var: abc
  31.       vars:
  32.         xyz: &quot;/u01/dbbackup_nfs/orabackups/odaserver-c/database/857970682/akash_2/db&quot;

给出了

  1. LAY [localhost] ******************************************************************************
  3. TASK [debug] **********************************************************************************
  4. ok: [localhost] =&gt; 
  5.   msg: |-
  6.         [u01, dbbackup_nfs, orabackups, odaserver-c, database, &#39;857970682&#39;, akash_2, db]
  8. TASK [debug] **********************************************************************************
  9. ok: [localhost] =&gt; 
  10.   msg: |-
  11.         [&#39;&#39;, u01, dbbackup_nfs, orabackups, odaserver-c, database, &#39;857970682&#39;, akash_2, db]
  13. TASK [debug] **********************************************************************************
  14. ok: [localhost] =&gt; 
  15.   abc: |-
  16.         /u01/dbbackup_nfs
  18. TASK [debug] **********************************************************************************
  19. ok: [localhost] =&gt; 
  20.   abc: |-
  21.         /u01/dbbackup_nfs
  23. PLAY RECAP ************************************************************************************
  24. localhost: ok=4    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

</sup>

英文:

The declaration below

  1.   abc: &quot;/{{ xyz.split(&#39;/&#39;)[1:3]|join(&#39;/&#39;) }}&quot;

gives what you want

  1.   abc: /u01/dbbackup_nfs

<hr>

<sup>

Q: "I needed from the first slash(/), so made it xyz.split(&#39;/&#39;)[0:3]|join(&#39;/&#39;)"

A: This depends on whether the path is absolute or relative. You can use a condition if you're not sure

  1.   abc: |
  2.     {% if xyz[0] == &#39;/&#39; %}
  3.     /{{ xyz.split(&#39;/&#39;)[1:3]|join(&#39;/&#39;) }}
  4.     {% else %}
  5.     /{{ xyz.split(&#39;/&#39;)[0:2]|join(&#39;/&#39;) }}
  6.     {% endif %}

The playbook for testing

  1. - hosts: localhost
  3.   vars:
  5.     abc: |
  6.       {% if xyz[0] == &#39;/&#39; %}
  7.       /{{ xyz.split(&#39;/&#39;)[1:3]|join(&#39;/&#39;) }}
  8.       {% else %}
  9.       /{{ xyz.split(&#39;/&#39;)[0:2]|join(&#39;/&#39;) }}
  10.       {% endif %}      
  12.   tasks:
  14.     - debug:
  15.         msg: &quot;{{ xyz.split(&#39;/&#39;)|to_yaml }}&quot;
  16.       vars:
  17.         xyz: &quot;u01/dbbackup_nfs/orabackups/odaserver-c/database/857970682/akash_2/db&quot;
  19.     - debug:
  20.         msg: &quot;{{ xyz.split(&#39;/&#39;)|to_yaml }}&quot;
  21.       vars:
  22.         xyz: &quot;/u01/dbbackup_nfs/orabackups/odaserver-c/database/857970682/akash_2/db&quot;
  24.     - debug:
  25.         var: abc
  26.       vars:
  27.         xyz: &quot;u01/dbbackup_nfs/orabackups/odaserver-c/database/857970682/akash_2/db&quot;
  29.     - debug:
  30.         var: abc
  31.       vars:
  32.         xyz: &quot;/u01/dbbackup_nfs/orabackups/odaserver-c/database/857970682/akash_2/db&quot;

gives

  1. LAY [localhost] ******************************************************************************
  3. TASK [debug] **********************************************************************************
  4. ok: [localhost] =&gt; 
  5.   msg: |-
  6.         [u01, dbbackup_nfs, orabackups, odaserver-c, database, &#39;857970682&#39;, akash_2, db]
  8. TASK [debug] **********************************************************************************
  9. ok: [localhost] =&gt; 
  10.   msg: |-
  11.         [&#39;&#39;, u01, dbbackup_nfs, orabackups, odaserver-c, database, &#39;857970682&#39;, akash_2, db]
  13. TASK [debug] **********************************************************************************
  14. ok: [localhost] =&gt; 
  15.   abc: |-
  16.         /u01/dbbackup_nfs
  18. TASK [debug] **********************************************************************************
  19. ok: [localhost] =&gt; 
  20.   abc: |-
  21.         /u01/dbbackup_nfs
  23. PLAY RECAP ************************************************************************************
  24. localhost: ok=4    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

</sup>

答案2

得分: 0

"I want to split this string ..."
我想要分割这个字符串...

A minimal example playbook utilizing the split filter in order to show how it works
一个最小的示例playbook，使用split过滤器来展示它的工作原理

  1. ---
  2. - hosts: localhost
  3.   become: false
  4.   gather_facts: false
  6.   vars:
  8.     PATH_TO_SPLIT: &quot;/user/folder/files/db&quot;
  10.   tasks:
  12.   - name: Split path
  13.     debug:
  14.       msg: &quot;{{ PATH_TO_SPLIT | split (&#39;/&#39;) }}&quot;
  16.   - name: Constructed path
  17.     debug:
  18.       msg: &quot;/{{ PATH_TO_SPLIT.split(&#39;/&#39;)[1] }}/{{ PATH_TO_SPLIT.split(&#39;/&#39;)[2] }}&quot;

will result into an output of
将产生以下输出

  1. TASK [Split path] ******
  2. ok: [localhost] =&gt;
  3.   msg:
  4.   - &#39;&#39;
  5.   - user
  6.   - folder
  7.   - files
  8.   - db
  10. TASK [Constructed path] ******
  11. ok: [localhost] =&gt;
  12.   msg: /user/folder

Further Documenation and Q&A
更多文档和问答

英文:

> I want to split this string ...

A minimal example playbook utilizing the split filter in order to show how it works

  1. ---
  2. - hosts: localhost
  3.   become: false
  4.   gather_facts: false
  6.   vars:
  8.     PATH_TO_SPLIT: &quot;/user/folder/files/db&quot;
  10.   tasks:
  12.   - name: Split path
  13.     debug:
  14.       msg: &quot;{{ PATH_TO_SPLIT | split (&#39;/&#39;) }}&quot;
  16.   - name: Constructed path
  17.     debug:
  18.       msg: &quot;/{{ PATH_TO_SPLIT.split(&#39;/&#39;)[1] }}/{{ PATH_TO_SPLIT.split(&#39;/&#39;)[2] }}&quot;

will result into an output of

  1. TASK [Split path] ******
  2. ok: [localhost] =&gt;
  3.   msg:
  4.   - &#39;&#39;
  5.   - user
  6.   - folder
  7.   - files
  8.   - db
  10. TASK [Constructed path] *******
  11. ok: [localhost] =&gt;
  12.   msg: /user/folder

Further Documenation and Q&A

huangapple
  • 本文由 发表于 2023年7月10日 19:36:57
  • 转载请务必保留本文链接：https://go.coder-hub.com/76653347.html
  • ansible
  • yaml
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