I have a play like this:
- name: Perform an action on a Runtime
hosts: all
roles:
- role: mule_action_on_Runtime
A variable at invocation (--extra-vars 'mule_runtime=MuleS01-3.7.3-Testing') has a prefix of the host needed (MuleS01). I want to set hosts: MuleS01. How do I do this?
Given that your pattern is always PartIWant-PartIDonCareAbout-AnotherPartAfterOtherDash you could use the split method of Python, then get the first item of the list via the Jinja filter first.
Here is full working playbook as example:
- hosts: local
gather_facts: no
tasks:
- debug:
msg: "{{ mule_runtime.split('-') | first }}"
This yield the recap:
play.yml --extra-vars 'mule_runtime=MuleS01-3.7.3-Testing'
PLAY [local] *******************************************************************
TASK [debug] *******************************************************************
ok: [local] => {
"msg": "MuleS01"
}
PLAY RECAP *********************************************************************
local : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
With the inventory
shell> cat hosts
MuleS01
MuleS02
MuleS03
this playbook
shell> cat pb.yml
- hosts: all
tasks:
- debug:
msg: Set {{ mule_runtime }}
when: mule_runtime.split('-').0 == inventory_hostname
gives
skipping: [MuleS02]
ok: [MuleS01] => {
"msg": "Set MuleS01-3.7.3-Testing"
}
skipping: [MuleS03]
Related
I have following inventory file
$ cat hosts
[web]
server1.example.com
server2.example.com
I would like to fetch the hostname, without the part of domain (.example.com).
I tried with the following playbook, however, it is still fetching with the entire hostname..
$ playbook.yaml
- hosts: localhost
tasks:
- debug:
msg: "{{ groups['web'] }}"
Output
PLAY [localhost] *************************************************************************************************************************************************************
TASK [Gathering Facts] *******************************************************************************************************************************************************
ok: [localhost]
TASK [debug] *****************************************************************************************************************************************************************
ok: [localhost] => {
"msg": [
"server1.example.com"
"server2.example.com"
]
}
PLAY RECAP *******************************************************************************************************************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
Expected output
PLAY [localhost] *************************************************************************************************************************************************************
TASK [Gathering Facts] *******************************************************************************************************************************************************
ok: [localhost]
TASK [debug] *****************************************************************************************************************************************************************
ok: [localhost] => {
"msg": [
"server1"
"server2"
]
}
PLAY RECAP *******************************************************************************************************************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
You can get what you want from a magic variable called inventory_hostname_short which basically returns anything before the first . found in the inventory_hostname.
To get this in a normal play host loop, it's as easy as:
- hosts: all
tasks:
- name: show target short name
debug:
var: inventory_hostname_short
If you need to get that for hosts not in the host loop, you will have to go through hostvars. Here is an example to get all those names in a list for a given group running from localhost:
- hosts: localhost
gather_facts: false
tasks:
- name: show list of shortnames for group 'toto'
debug:
msg: "{{ groups['toto'] | map('extract', hostvars, 'inventory_hostname_short') }}"
An other example to get that name only for the first server in group 'toto'
- hosts: localhost
gather_facts: false
tasks:
- name: show shortnames for first server in group 'toto'
vars:
server_name: "{{ groups['toto'][0] }}"
debug:
msg: "{{ hostvars[server_name].inventory_hostname_short }}"
I have this URL string server https://test.example.com:6443. I need to extract only hostname test from it using Ansible task.
came up with this playbook, Is there a better way of doing this with-out using sed?
- hosts: localhost
connection: local
gather_facts: no
tasks:
- name: get the URL
shell: echo 'server https://test.example.com:6443' |sed -e 's/^.*https...//' -e 's/\..*$//'
register: result
- name: Print the var
debug:
msg: "{{ result.stdout }}"
Output
PLAY [localhost] *********************************************************************************************************************
TASK [get the URL] *******************************************************************************************************************
changed: [localhost]
TASK [Print the var] *****************************************************************************************************************
ok: [localhost] => {
"msg": "test"
}
PLAY RECAP ***************************************************************************************************************************
localhost : ok=2 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
You can use split on the URL name and get the desired value, Ideally hostname should be test.example.com in your case. However, you can customize the split function based on your need also as below.
- hosts: localhost
connection: local
gather_facts: no
vars:
url: "https://test.example.com:6443"
tasks:
- name: Print the hostname var
debug:
msg: "{{ url.split(':')[1].split('//')[1] }}"
- name: Print the subdomain prefix
debug:
msg: "{{ url.split(':')[1].split('//')[1].split('.')[0] }}"
Need your help in achieving below:
- use variables provided inline with hostIP (i.e. host variables) in Ansible inventory
my inventory:
[ora_patch]
10.24.29.14 SID=orcl,orcl2
my playbook:
---
- hosts: [ora_patch]
tasks:
- debug:
var: "{{ hostvars[ansible_host]['SID'] }}"
Output ** I GET **:
PLAY [ora_patch] ************************************************************
TASK [patch_ora_si_122 : debug] *****************************************
ok: [10.24.29.14] => {
"orcl,orcl2": "(Undefined, Undefined)"
}
PLAY RECAP ******************************************************************
10.24.29.14 : ok=1 changed=0 unreachable=0 failed=0
Output ** I want ** :
PLAY [ora_patch] ***********************************************************
TASK [patch_ora_si_122 : debug] ****************************************
ok: [10.24.29.14] => {
"SID": "orcl,orcl2"
}
PLAY RECAP *****************************************************************
10.24.29.14 : ok=1 changed=0 unreachable=0 failed=0
Command I execute:
ansible-playbook -i inventory patch_ora_si_122.yml
Your playbook is slightly wrong. You are trying to use the content of the hostvar "{{ hostvars[ansible_host]['SID'] }}" as a variable name to display with debug: var=....
Simply change your playbook to
---
- hosts: ora_patch
tasks:
- debug:
msg: "SID: {{ hostvars[ansible_host]['SID'] }}"
or you could also use the variable name directly:
---
- hosts: ora_patch
tasks:
- debug:
var: SID
Ansible inventory.ini follows beloe format.
[hosts]
[hosts:vars]
The below should work:
[ora_patch]
10.24.29.14 SID=orcl,orcl2
[ora_patch:vars]
SID=orcl,orcl2
I have a path which looks like this -
base_dir/123/path/to/G\$/subdirectory/html/
When I try to set this path in Ansible playbook, it throws error. If add \$ to escape '\', it throws unexpected failure error.
Playbkook -
- hosts: localhost
vars:
account_id: 123
tasks:
- name: Add \ to path
debug:
var: "base_dir/{{ account_id }}/path/to/G\\$/subdirectory/html/"
Result -
TASK [Gathering Facts] *************************************************************************************************************************************************
task path: /playbooks/example_path.yml:2
ok: [localhost]
META: ran handlers
TASK [Add \ to path] ***************************************************************************************************************************************************
task path: /playbooks/exmaple_path.yml:6
fatal: [localhost]: FAILED! => {
"msg": "Unexpected failure during module execution."
}
PLAY RECAP *************************************************************************************************************************************************************
localhost : ok=1 changed=0 unreachable=0 failed=1
As explained in the debug module documentation, the var option is expecting a variable name, not a scalar for output. You are getting an error because \ is not expected in a variable name. Running the playbook with -vvv will give you a little more explanations.
In this case you need to use the msg option.
- hosts: localhost
gather_facts: false
vars:
account_id: 123
tasks:
- name: Add \ to path
debug:
msg: "base_dir/{{ account_id }}/path/to/G\\$/subdirectory/html/"
Result
PLAY [localhost] ***************************************************************
TASK [Add \ to path] ***********************************************************
ok: [localhost] => {
"msg": "base_dir/123/path/to/G\\$/subdirectory/html/"
}
PLAY RECAP *********************************************************************
localhost : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
The next option is to use the Single-Quoted Style. See the example below
- hosts: localhost
vars:
my_dir1: "/scratch/tmp/G1\\$"
my_dir2: '/scratch/tmp/G2\$'
tasks:
- file:
state: directory
path: "{{ item }}"
loop:
- "{{ my_dir1 }}"
- "{{ my_dir2 }}"
# ls -1 /scratch/tmp/
'G1\$'
'G2\$'
I there any way to pass/update group variables from within the playbook task?
I need to define variables based on results of some commands from one host to use them for other roles and tasks. I know about set_fact but it stores variable as local variable so that I need to address specific host to get it but hostname/address of this host can vary.
Googling and reading docs.ansible.com doesn't help still.
UPD: there is 2 different roles that playing tasks one after another and I need to pass variables between plays.
An option would be to use ansible modules lineinfile, blockinfile, template, and ini_file to update group variables.
For example the play below
- hosts: test_jails
gather_facts: false
vars:
my_groupvar_file: "{{ inventory_dir }}/group_vars/test_jails.yml"
tasks:
- debug:
var: my_last_run
- block:
- command: date "+%F %T"
register: result
- lineinfile:
path: "{{ my_groupvar_file }}"
regexp: "^my_last_run: "
line: "my_last_run: {{ result.stdout }}"
backup: yes
delegate_to: localhost
run_once: true
with group variables group_vars/test_jails.yml
my_last_run: 2019-04-19 11:51:00
gives (abridged):
> ansible-playbook test1.yml
PLAY [test_jails]
TASK [debug]
ok: [test_01] => {
"my_last_run": "2019-04-19 11:51:00"
}
ok: [test_03] => {
"my_last_run": "2019-04-19 11:51:00"
}
ok: [test_02] => {
"my_last_run": "2019-04-19 11:51:00"
}
TASK [command]
changed: [test_01]
TASK [lineinfile]
changed: [test_01 -> localhost]
PLAY RECAP
test_01 : ok=3 changed=2 unreachable=0 failed=0
test_02 : ok=1 changed=0 unreachable=0 failed=0
test_03 : ok=1 changed=0 unreachable=0 failed=0
> cat group_vars/test_jails.yml
my_last_run: 2019-04-19 11:56:51