仅当相关目录足够旧（例如超过 30 天）时，如何触发 Ansible 任务？
想要做类似的事情
- name: backup biggest files
#get difference between currentdate & last backup
register: age
我知道我可以得到一个字符串或一个定义的when子句，但我不知道如何在这里。
我的目标是，/mnt/backup.YYYYMMDD例如，如果超过 30 天，则创建一个任务列表来创建新的日期目录并自行进行备份（同步方法可能很好？）。
我怎样才能得到这个？
获取步骤：
- 查找上次备份日期
- 查找当前日期
- 他们之间的算术差异
- 将该差异应用为 yaml 文件中任务中的 when 语句
- name: Check the last backup date
shell: |
#or find module
register: lastone
- name: Get current date for arithmetics
shell: |
echo $(date +%s)
register: currentdate
- name: Find ideal path to create new backup if last one is too old
# define & create new directory if currentdate - lastone is over a numeric value (suffisant difference)
when: "{{ currentdate | int - lastone | int }}" > 40000
在这里，我已经完成了用于测试的解决方案猪风格的虚拟开始：
---
- hosts: localhost
become: true
become_method: sudo
become_user: francois
tasks:
- name: Check the last backup date
shell: |
date +%s -r $(find /mnt{1,2,3}/ -type d -name "backup.*[0-9]" 2> /dev/null | sort | tail -1)
args:
executable: /bin/bash
register: lastone
- name: Get current date for arithmetics
shell: |
date +%s
register: currentdate
- set_fact:
difference: "{{ currentdate.stdout | int - lastone.stdout | int }}"
- name: Find ideal path to create new backup if last one is too old
shell: |
find /mnt{1,2,3}/ -type d -name "backup.*[0-9]" 2> /dev/null | sort -n | tail -1 | sed "s/\.[0-9].*/\.$(date +%Y%m%d)/"
args:
executable: /bin/bash
register: rep
when:
- difference | int > 4000
- name: Create path
file:
path: "{{ rep.stdout }}"
state: directory
mode: "0755"
when:
- rep is defined
- difference | int > 4000
这会很好地创建backup.20210630目录，无论它安装在/mnt1or2或3(这里 3）。
答案1
关于你的主要问题
仅当相关目录足够旧时，如何触发 Ansible 任务？ ...我的目标是如果
backup.YYYYMMDD超过 30 天...
我根据给定的命名约定设置了一个小目录测试
$ ls -l
drwxr-xr-x. 2 user group 4096 Jan 2 00:00 backup.20220102
drwxr-xr-x. 2 user group 4096 Jan 9 00:00 backup.20220109
drwxr-xr-x. 2 user group 4096 Jan 16 00:00 backup.20220116
drwxr-xr-x. 2 user group 4096 Jan 23 00:00 backup.20220123
drwxr-xr-x. 2 user group 4096 Jan 30 00:00 backup.20220130
drwxr-xr-x. 2 user group 4096 Feb 6 00:00 backup.20220206
以及更改mtime目录的通过touch -t YYMMDDHHMM.SS backup.YYYYMMDD。
$ stat backup.20220102/
File: ‘backup.20220102/’
Size: 4096 Blocks: 8 IO Block: 4096 directory
...
Access: (0755/drwxr-xr-x) Uid: (1234/user) Gid: (1234/group)
Context: unconfined_u:object_r:user_home_t:s0
Access: 2022-01-02 00:00:00.000000000 +0100
Modify: 2022-01-02 00:00:00.000000000 +0100
Change: 2022-02-06 09:00:00.000000000 +0100
Birth: -
可以根据[am]time属性或名称后缀进行比较YYYYMMDD。你可以从find模块。
---
- hosts: test
become: false
gather_facts: false
tasks:
- name: Find directories older than 30 days
find:
paths: "/home/{{ ansible_user }}"
file_type: directory
age: 30d
register: result
- name: Show result
debug:
msg: "{{ item[0] }}"
loop:
- "{{ result.files | flatten(levels=1) }}"
loop_control:
extended: yes
label: "{{ ansible_loop.index0 }}"
然后loop超过结果变量和过滤数据。您还可以查看该stat模块检索文件或文件系统状态。
要“查找”您当前的日期，您可以查看Ansible 事实。
---
- hosts: test
become: false
gather_facts: true
tasks:
- name: Show Gathered Facts
debug:
msg: "{{ ansible_facts }}"
因为它通常已经收集好了。
TASK [Show Gathered Facts] ******
ok: [test.example.com] =>
msg:
...
date_time:
date: '2022-02-06'
day: '06'
epoch: '1644142041'
hour: '11'
iso8601: '2022-02-06T10:07:21Z'
iso8601_basic: 20220206T110721823347
iso8601_basic_short: 20220206T110721
iso8601_micro: '2022-02-06T10:07:21.823347Z'
minute: '07'
month: '02'
second: '21'
time: '11:07:21'
tz: CET
tz_offset: '+0100'
weekday: Sunday
weekday_number: '0'
weeknumber: '05'
year: '2022'
...