Hello. I have a task to collect some information from 100+ hosts and want
to organize it in a table.
I want to use:
1. Ansible for collecting information;
2. CGI script to generate HTML page with collected information (the
information is some users last date login, last time of some files
modification (I get it with scripts by ssh) if you can advise some
monitoring service that supports similar operations, please do it).
The problem is that I'm new in Ansible and can't even understand if it's
possible to do what I want with Ansible.
There's 2 hosts in group 'test'. Let's imagine I want to ls for some file
somewhere (ls /var/someprogram.pid) and to know who is registered now
("who").
My attemtpts:
1.
- hosts: test
serial: 1
user: dmitresso
tasks:
- shell: who
register: response1
- shell: ls /tmp/someprogram.pid
register: response2
- hosts: local
tasks:
- debug:
var: hostvars['item']['response1']['stdout_lines']
with_items: "{{ groups['test'] }}"
Response:
dmitresso@host ~/ansible $ ansible-playbook pb.yml
PLAY [test]
********************************************************************
TASK [setup]
*******************************************************************
ok: [host1]
TASK [command]
*****************************************************************
changed: [host1]
TASK [command]
*****************************************************************
changed: [host1]
PLAY [test]
********************************************************************
TASK [setup]
*******************************************************************
ok: [host2]
TASK [command]
*****************************************************************
changed: [host2]
TASK [command]
*****************************************************************
changed: [host2]
PLAY [local]
*******************************************************************
TASK [setup]
*******************************************************************
ok: [localhost]
TASK [debug]
*******************************************************************
ok: [localhost] => (item=host1) => {
"hostvars['item']['response1']['stdout_lines']": "VARIABLE IS NOT
DEFINED!",
"item": "host1"
}
ok: [localhost] => (item=host2) => {
"hostvars['item']['response1']['stdout_lines']": "VARIABLE IS NOT
DEFINED!",
"item": "host2"
}
PLAY RECAP
*********************************************************************
host1 : ok=3 changed=2 unreachable=0 failed=0
host2 : ok=3 changed=2 unreachable=0 failed=0
localhost : ok=2 changed=0 unreachable=0 failed=0
I can iterate the group, but variables are undefined. And I don't know how
to get "response2" even if it was defined.
2.
- hosts: test
serial: 1
user: dmitresso
tasks:
- shell: who
register: response1
- shell: ls /tmp/someprogram.pid
register: response2
- hosts: local
tasks:
- debug:
var: hostvars[groups['test'][0]]['response1']['stdout_lines']
- debug:
var: hostvars[groups['test'][0]]['response2']['stdout_lines']
- debug:
var: hostvars[groups['test'][1]]['response1']['stdout_lines']
- debug:
var: hostvars[groups['test'][1]]['response2']['stdout_lines']
Response:
dmitresso@host ~/ansible $ ansible-playbook pb.yml
PLAY [test]
********************************************************************
TASK [setup]
*******************************************************************
ok: [host1]
TASK [command]
*****************************************************************
changed: [host1]
TASK [command]
*****************************************************************
changed: [host1]
PLAY [test]
********************************************************************
TASK [setup]
*******************************************************************
ok: [host2]
TASK [command]
*****************************************************************
changed: [host2]
TASK [command]
*****************************************************************
changed: [host2]
PLAY [local]
*******************************************************************
TASK [setup]
*******************************************************************
ok: [localhost]
TASK [debug]
*******************************************************************
ok: [localhost] => {
"hostvars[groups['test'][0]]['response1']['stdout_lines']": [
"dmitresso pts/0 May 25 09:00 (host)"
]
}
TASK [debug]
*******************************************************************
ok: [localhost] => {
"hostvars[groups['test'][0]]['response2']['stdout_lines']": [
"/tmp/someprogram.pid"
]
}
TASK [debug]
*******************************************************************
ok: [localhost] => {
"hostvars[groups['test'][1]]['response1']['stdout_lines']": [
"dmitresso pts/0 May 25 09:00 (host)"
]
}
TASK [debug]
*******************************************************************
ok: [localhost] => {
"hostvars[groups['test'][1]]['response2']['stdout_lines']": [
"/tmp/someprogram.pid"
]
}
PLAY RECAP
*********************************************************************
host1 : ok=3 changed=2 unreachable=0 failed=0
host2 : ok=3 changed=2 unreachable=0 failed=0
localhost : ok=5 changed=0 unreachable=0 failed=0
There's nice result. But how can I make a request to multiple hosts?
There's bad idea to write single line for every host. I've tried
- hostvars[groups['test']]['response1']['stdout_lines']
- hostvars[groups['test'][*]]['response1']['stdout_lines']
- hostvars[groups['test'][1-2]]['response1']['stdout_lines']
- hostvars[groups['test'][1:2]]['response1']['stdout_lines']
They all can't do what I want.
Second question - is there a bad idea to write this information to file and
then parse it? Maybe start script on localhost and pass all this info to it?
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