Getting hostnames from a fact
lift...@gmail.com
- hosts: my_hosts
become: true
become_method: sudo
gather_facts: false
tasks:
- name: Determine if /var/log/messages is zero-length
ansible.builtin.find:
paths: /var/log
patterns: messages
register: messages_files
- name: Set fact for all servers that have zero-length /var/log/messages
ansible.builtin.set_fact:
zero: "{{ messages_files.files | selectattr('size', '==', 0) }}"
- name: Print results
ansible.builtin.debug:
msg: "{{ zero }}"
"msg": [
{
"atime": 1713683723.242925,
"ctime": 1713683723.242925,
"dev": 64777,
"gid": 10,
"gr_name": "wheel",
"inode": 8212,
"isblk": false,
"ischr": false,
"isdir": false,
"isfifo": false,
"isgid": false,
"islnk": false,
"isreg": true,
"issock": false,
"isuid": false,
"mode": "0640",
"mtime": 1713683723.242925,
"nlink": 1,
"path": "/var/log/messages",
"pw_name": "root",
"rgrp": true,
"roth": false,
"rusr": true,
"size": 0,
"uid": 0,
"wgrp": false,
"woth": false,
"wusr": true,
"xgrp": false,
"xoth": false,
"xusr": false
}
]
}
ok: [server2] => {
"msg": []
}
dulh...@mailbox.org
1) How can I NOT print what server2 is printing/showing?
- name: Print results
ansible.builtin.debug:
msg: "{{ zero }}"
so the print only happens when the condition is met. The condition might be some value from the message_files variable
Or maybe something like:
when: meages_files.ssfiles | selectattr('size', '==', 0)
not sure about that though because I don't understand really what meages_files.ssfiles | selectattr('size', '==', 0) does
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lift...@gmail.com
Todd Lewis
You probably want to use ansible.builtin.stat which will tell you both whether the file exists (find doesn't find it if it doesn't) and what size it is.
- name: Get stat for /var/log/messages
ansible.builtin.stat:
path: /var/log/messages
register: messages_files
- name: What to do about missing /var/log/messages?
ansible.builtin.debug:
msg: '{{ inventory_hostname }} has no /var/log/messages. Now what?'
when: not messages_files.stat.exists
- name: Restart syslog if /var/log/messages is zero-length
ansible.builtin.service:
name: syslog
state: restarted
when: messages_files.stat.exists and messages_files.stat.size == 0
There's no need to start another play to do the service restarts.—
Todd
To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/92d08bef-67eb-46d5-a2c1-6bcb75d2e262n%40googlegroups.com.
-- Todd
Todd Lewis
Well, the set_fact is supposed to only register or select anything where the size parameter of the files attributes is 0. The ones that are printing just [] don't fit that criteria, and therefore, shouldn't be included in the debug output. Yet they are, so that's what I'm trying to fix/clean up first.
You're doing an ansible.builtin.set_fact on all the hosts, the value of which is a subset of that list.
But that, too, is a list, even if it is an empty list.
So you'll get an empty list for any host where either (a) no /var/log/messages file was found (not likely), or (b) where /var/log/messages is not zero-length.
But there's nothing in your first few tasks to preclude ansible.builtin.debug from showing these very real and very much there empty lists.
-- Todd
Stuart Lowe
Something like this should work?
---
- hosts: my_hosts
become: true
become_method: sudo
gather_facts: false
tasks:
- name: Determine if /var/log/messages is zero-length
ansible.builtin.find:
paths: /var/log
patterns: messages
register: messages_files
- name: Check if /var/log/messages is zero length
ansible.builtin.stat:
path: "{{ item.path }}"
register: file_details
with_items: "{{ messages_files.files }}"
when: messages_files.matched > 0
- name: Restart rsyslog service if /var/log/messages is zero length
ansible.builtin.systemd:
name: rsyslog
state: restarted
when: item.stat.exists and item.stat.size == 0
with_items: "{{ file_details.results }}"
From: ansible...@googlegroups.com <ansible...@googlegroups.com>
On Behalf Of lift...@gmail.com
Sent: Wednesday, April 24, 2024 8:27 PM
To: Ansible Project <ansible...@googlegroups.com>
Subject: [ansible-project] Getting hostnames from a fact
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Stuart Lowe He/Him
Zen Cloud Engineering - Team Leader
Zen Internet
www.zen.co.uk
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