Hi,
I do regularly have the problem that I want to manage directory
contents. To make things easier, we take an every day example such as
/etc/apt/sources.list.d on a Debian system. While I am aware that there
is a special apt module in ansible, I still chose to tackle this issue
"manually" because my ultimate goal is generic directory contents
management, not apt management. I chose apt as an example since that's
easier to reproduce for you.
I want:
- files written in the directory by ansible
- when a file ceases to be managed by ansible, the file should be
removed. This is made easier by the fact that the ansible-managed
files do match a certain glob, here: zda-*.
- If a file doesn't change, it should not be touched. This includes
that it is not desired that a file gets deleted and recreated with
the same contents in the same ansible run.
- Files placed into the directory manually by the local admin should
remain untouched.
Here is my code:
==> ./site.yml <==
---
- name: apply common configuration
hosts: all
remote_user: mh
become: "yes"
roles:
- common
- name: clean up after apt configuration
hosts: apt_action_hosts
remote_user: mh
become: "yes"
roles:
- zzhandleapt
==> ./roles/common/tasks/main.yml <==
---
- name: repos
import_tasks: repos.yml
==> ./roles/common/tasks/repos.yml <==
---
- name: search for sources.list.d files
find:
paths: "/etc/apt/sources.list.d"
patterns: "zda-*.list"
register: presentsourceslistfiles
- name: set up fact list for wanted sources.list.d entries
set_fact:
wantedsourceslistfiles:
- name: include repositories
tags:
repos
include_tasks:
"debian/sid/repos.yml"
==> ./roles/common/tasks/debian/sid/repos.yml <==
---
- name: create list of sid wantedsourceslistfiles
set_fact:
sidwantedsourceslistfiles:
- /etc/apt/sources.list.d/zda-sid-mc.list
- name: add sid files to wantedsourceslistfiles
set_fact:
wantedsourceslistfiles: "{{ wantedsourceslistfiles }} + {{
sidwantedsourceslistfiles }}"
- name: zda-sid-mc.list
tags:
- repos
- sid
copy:
dest: /etc/apt/sources.list.d/zda-sid-mc.list
owner: root
group: root
mode: 0644
content: |
deb http://debian.debian.zugschlus.de/debian/ sid main contrib
notify: apt update
==> ./roles/common/handlers/main.yml <==
---
- name: apt update
add_host:
name: "{{ inventory_hostname }}"
groups: apt_action_hosts
==> ./roles/zzhandleapt/tasks/main.yml <==
---
- name: repos
import_tasks: repos.yml
==> ./roles/zzhandleapt/tasks/repos.yml <==
---
- debug:
msg: "wantedsourcelistfiles {{wantedsourceslistfiles}}"
- name: delete sources.list.d files
file:
path: "{{ item.path }}"
state: absent
with_items: "{{ presentsourceslistfiles.files }}"
when: item.path not in wantedsourceslistfiles
- name: apt update
command: apt update
==> ./hosts.yml <==
---
all:
vars:
dummy: dummy
children:
g_all:
hosts:
sid01:
sid02:
The idea is the following:
(1) build a list of all files that we might want to delete later
(2) roll out the files that we actually want, build a list of those
files
(3) later iterate through list (1) and delete all files that are not
in list (2).
Unfortunately, that does not seem to work. A possible reason might be
that the lists are not by-host, but per-ansible-run.
On both hosts, remove /etc/apt/sources.list.d/zda-sid-mc.list and touch
/etc/apt/sources.list.d/zda-stretch-mc.list. Expected is that ansible
removes the -stretch- files and places the -sid-files.
First ansible run:
[51/5036]mh@drop:~/git/zgansibletest (master * u+1) (crm) $ ansible-playbook
--ask-become-pass --inventory=hosts.yml site.yml
SUDO password:
PLAY [apply common configuration]
*******************************************************************************************************************
TASK [Gathering Facts]
******************************************************************************************************************************
ok: [sid02]
ok: [sid01]
TASK [common : search for sources.list.d files]
*****************************************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : set up fact list for wanted sources.list.d entries]
**********************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : include repositories]
****************************************************************************************************************
included: /home/mh/git/zgansibletest/roles/common/tasks/debian/sid/repos.yml
for sid01, sid02
TASK [common : create list of sid wantedsourceslistfiles]
*******************************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : add sid files to wantedsourceslistfiles]
*********************************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : zda-sid-mc.list]
*********************************************************************************************************************
changed: [sid01]
changed: [sid02]
RUNNING HANDLER [common : apt update]
***************************************************************************************************************
changed: [sid01]
PLAY [clean up after apt configuration]
*************************************************************************************************************
TASK [Gathering Facts]
******************************************************************************************************************************
ok: [sid01]
TASK [zzhandleapt : debug]
**************************************************************************************************************************
ok: [sid01] => {
"msg": "wantedsourcelistfiles +
[u'/etc/apt/sources.list.d/zda-sid-mc.list']"
}
TASK [zzhandleapt : delete sources.list.d files]
****************************************************************************************************
changed: [sid01] => (item={u'uid': 0, u'woth': False, u'mtime':
1522519373.161373, u'inode': 408337, u'isgid': False, u'size': 0, u'isuid':
False, u'isreg': True, u'gid': 0, u'ischr': False, u'wusr': True, u'xoth':
False, u'islnk': False, u'nlink': 1, u'issock': False, u'rgrp': True, u'path':
u'/etc/apt/sources.list.d/zda-stretch-mc.list', u'xusr': False, u'atime':
1522519416.4131262, u'isdir': False, u'ctime': 1522519373.161373, u'isblk':
False, u'wgrp': False, u'xgrp': False, u'dev': 65025, u'roth': True, u'isfifo':
False, u'mode': u'0644', u'rusr': True})
TASK [zzhandleapt : apt update]
*********************************************************************************************************************
changed: [sid01]
PLAY RECAP
******************************************************************************************************************************************
sid01 : ok=12 changed=4 unreachable=0 failed=0
sid02 : ok=7 changed=1 unreachable=0 failed=0
The first host is fine, but the -stretch- file is not removed on the second
host.
Second ansible run:
[52/5037]mh@drop:~/git/zgansibletest (master * u+1) (crm) $ ansible-playbook
--ask-become-pass --inventory=hosts.yml site.yml
SUDO password:
PLAY [apply common configuration]
*******************************************************************************************************************
TASK [Gathering Facts]
******************************************************************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : search for sources.list.d files]
*****************************************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : set up fact list for wanted sources.list.d entries]
**********************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : include repositories]
****************************************************************************************************************
included: /home/mh/git/zgansibletest/roles/common/tasks/debian/sid/repos.yml
for sid01, sid02
TASK [common : create list of sid wantedsourceslistfiles]
*******************************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : add sid files to wantedsourceslistfiles]
*********************************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : zda-sid-mc.list]
*********************************************************************************************************************
ok: [sid01]
ok: [sid02]
[WARNING]: Could not match supplied host pattern, ignoring: apt_action_hosts
PLAY [clean up after apt configuration]
*************************************************************************************************************
skipping: no hosts matched
PLAY RECAP
******************************************************************************************************************************************
sid01 : ok=7 changed=0 unreachable=0 failed=0
sid02 : ok=7 changed=0 unreachable=0 failed=0
This is an obvious no-op, with ansible not doing anything on the second host,
but I would have expected it to remove the -stretch- file anyway
To force things, remove the -sid- file on the second host and invoke third
ansible run:
[53/5037]mh@drop:~/git/zgansibletest (master * u+1) (crm) $ ansible-playbook
--ask-become-pass --inventory=hosts.yml site.yml
SUDO password:
PLAY [apply common configuration]
*******************************************************************************************************************
TASK [Gathering Facts]
******************************************************************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : search for sources.list.d files]
*****************************************************************************************************
ok: [sid02]
ok: [sid01]
TASK [common : set up fact list for wanted sources.list.d entries]
**********************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : include repositories]
****************************************************************************************************************
included: /home/mh/git/zgansibletest/roles/common/tasks/debian/sid/repos.yml
for sid01, sid02
TASK [common : create list of sid wantedsourceslistfiles]
*******************************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : add sid files to wantedsourceslistfiles]
*********************************************************************************************
ok: [sid01]
ok: [sid02]
TASK [common : zda-sid-mc.list]
*********************************************************************************************************************
ok: [sid01]
changed: [sid02]
RUNNING HANDLER [common : apt update]
***************************************************************************************************************
changed: [sid02]
PLAY [clean up after apt configuration]
*************************************************************************************************************
TASK [Gathering Facts]
******************************************************************************************************************************
ok: [sid02]
TASK [zzhandleapt : debug]
**************************************************************************************************************************
ok: [sid02] => {
"msg": "wantedsourcelistfiles +
[u'/etc/apt/sources.list.d/zda-sid-mc.list']"
}
TASK [zzhandleapt : delete sources.list.d files]
****************************************************************************************************
changed: [sid02] => (item={u'uid': 0, u'woth': False, u'mtime':
1522519445.3628857, u'inode': 409536, u'isgid': False, u'size': 0, u'isuid':
False, u'isreg': True, u'gid': 0, u'ischr': False, u'wusr': True, u'xoth':
False, u'islnk': False, u'nlink': 1, u'issock': False, u'rgrp': True, u'path':
u'/etc/apt/sources.list.d/zda-stretch-mc.list', u'xusr': False, u'atime':
1522519449.9509423, u'isdir': False, u'ctime': 1522519445.3628857, u'isblk':
False, u'wgrp': False, u'xgrp': False, u'dev': 65025, u'roth': True, u'isfifo':
False, u'mode': u'0644', u'rusr': True})
TASK [zzhandleapt : apt update]
*********************************************************************************************************************
changed: [sid02]
PLAY RECAP
******************************************************************************************************************************************
sid01 : ok=7 changed=0 unreachable=0 failed=0
sid02 : ok=12 changed=4 unreachable=0 failed=0
Now, things are as I want them.
However, the way to get there is unsatisfactory. Can somebody explain
what is happening and tell me how to do things right? If inserting debug
code helps, I'll happily do this, but I do not yet know too well how to
do this, so please suggest pasteable things. Thanks in advance!
Greetings
Marc
--
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Marc Haber | "I don't trust Computers. They | Mailadresse im Header
Leimen, Germany | lose things." Winona Ryder | Fon: *49 6224 1600402
Nordisch by Nature | How to make an American Quilt | Fax: *49 6224 1600421
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