[英]How to compare multiple files in Ansible
我正在嘗試找到一種方法來將目錄中的多個文件與另一個目錄中的文件進行比較。 例如 - 目錄 /home/ansible/properties/ 中有 10 個文件,遠程主機上的另一個目錄(如 /opt/apps/properties/)中有類似的文件集。 我想比較它們中的每一個,可能使用校驗和,即使其中一個文件被更改,然后做一些任務 -
我的劇本下面可以比較一個文件,但是有沒有辦法比較所有文件或目錄?
- name: Get checksum of my First file
stat:
path : "/home/ansible/properties/my.properties"
register: myfirstfile
- name: Current SHA1
set_fact:
1stFilechecksum: "{{ myfirstfile.stat.checksum }}"
- name: Get checksum of my Second File
stat:
path : "/opt/aaps/properties/my.properties"
register: mysecondfile
- name: Current SHA1
set_fact:
2ndFilechecksum: "{{ mysecondfile.stat.checksum }}"
- name: Comparing 2 files
debug:
msg: "Do Something....."
when: 1stFilechecksum != 2ndFilechecksum
……或者至少我從中了解到的。
/tmp/test/a /tmp/test/b
├── file10.txt ├── file10.txt
├── file1.txt ├── file1.txt
├── file2.txt ├── file2.txt
├── file3.txt ├── file3.txt
├── file4.txt ├── file4.txt
├── file5.txt ├── file5.txt
├── file6.txt ├── file6.txt
├── file7.txt ├── file7.txt
├── file8.txt ├── file8.txt
├── file9.txt ├── file9.txt
└── toto.txt └── titi.txt
如您所見,所有文件都是通用的,除了每個目錄中的文件。 這些將被排除在比較之外。 對於通用文件,除了file2.txt
和file5.txt
具有相同的內容外,其他文件都是不同的。
find
循環搜索兩個目錄中的所有文件。 a
中的所有文件都在results[0]
中, b
中的所有文件都在results[1]
中。 get_checksum
選項收集我們需要的信息。a
.selectattr
僅選擇具有相同path
名的列表元素來計算b
中的相應文件。 保留結果的第一個元素給出了我們的文件。 如果結果為空(不是公共文件),我們默認為空 objectloop_control
用於自定義循環變量名稱以提高可讀性(即 item => file1)並將循環項目的 output 限制為可以理解的內容。---
- name: compare files in two dirs
hosts: localhost
gather_facts: false
vars:
dir1: /tmp/test/a
dir2: /tmp/test/b
tasks:
- name: "Find all files in {{ dir1 }} and {{ dir2 }}"
find:
paths:
- "{{ item }}"
get_checksum: true
register: search_files
loop:
- "{{ dir1 }}"
- "{{ dir2 }}"
- name: "Compare checksums from {{ dir1 }} to {{ dir2 }}. do something if different"
vars:
file2: >-
{{
search_files.results[1].files |
selectattr('path', 'eq', file1.path | replace(dir1, dir2)) |
list |
first |
default({})
}}
debug:
msg: "Files differ. Do something"
loop: "{{ search_files.results[0].files }}"
loop_control:
loop_var: file1
label: "Comparing {{ file1.path }} to {{ file2.path | default('N/A') }}"
when:
- file2.path is defined
- file1.checksum != file2.checksum
$ ansible-playbook test.yml
PLAY [compare files in two dirs] ***************************************************************************************************************
TASK [Find all files in /tmp/test/a and /tmp/test/b] *******************************************************************************************
ok: [localhost] => (item=/tmp/test/a)
ok: [localhost] => (item=/tmp/test/b)
TASK [Compare checksums from /tmp/test/a to /tmp/test/b. do something if different] ************************************************************
ok: [localhost] => (item=Comparing /tmp/test/a/file1.txt to /tmp/test/b/file1.txt) => {
"msg": "Files differ. Do something"
}
skipping: [localhost] => (item=Comparing /tmp/test/a/file2.txt to /tmp/test/b/file2.txt)
ok: [localhost] => (item=Comparing /tmp/test/a/file3.txt to /tmp/test/b/file3.txt) => {
"msg": "Files differ. Do something"
}
ok: [localhost] => (item=Comparing /tmp/test/a/file4.txt to /tmp/test/b/file4.txt) => {
"msg": "Files differ. Do something"
}
skipping: [localhost] => (item=Comparing /tmp/test/a/file5.txt to /tmp/test/b/file5.txt)
ok: [localhost] => (item=Comparing /tmp/test/a/file6.txt to /tmp/test/b/file6.txt) => {
"msg": "Files differ. Do something"
}
ok: [localhost] => (item=Comparing /tmp/test/a/file7.txt to /tmp/test/b/file7.txt) => {
"msg": "Files differ. Do something"
}
ok: [localhost] => (item=Comparing /tmp/test/a/file8.txt to /tmp/test/b/file8.txt) => {
"msg": "Files differ. Do something"
}
ok: [localhost] => (item=Comparing /tmp/test/a/file9.txt to /tmp/test/b/file9.txt) => {
"msg": "Files differ. Do something"
}
ok: [localhost] => (item=Comparing /tmp/test/a/file10.txt to /tmp/test/b/file10.txt) => {
"msg": "Files differ. Do something"
}
skipping: [localhost] => (item=Comparing /tmp/test/a/toto.txt to N/A)
PLAY RECAP *************************************************************************************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
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