Create variables based on hostname

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1

Hi - I want to create 3 variables based on hostname. These variables will be used inside other tasks.

Host Pattern: mabos

Ex: mabosqa1was01

what is the best way to create variables and use for subsequent task on host ?

should I write 3 different shell scripts to register appropriate variables ?

Thanks,

2

You can create your own filter. I’ve created this one that you should easily be able to modify to suit your needs.

`
import math
import collections
from ansible import errors

def uppercase_all(arg):
return arg.upper()

def extract_siteid(arg):
if len(arg) < 10:
return FALSE
site_id = arg[:7]
return site_id

def extract_datacenter(arg):
if len(arg) < 10:
return FALSE
datacenter = arg[7:10]
return datacenter

class FilterModule(object):
def filters(self):
return {‘uppercase_all’: uppercase_all, ‘extract_siteid’: extract_siteid, ‘extract_datacenter’: extract_datacenter}

`

3

just define vars based on inventory_hostname:

group_vars/all.yml

nodenum: '{{inventory_hostname|regex_replace("mabos.+?(\d+)$", "\1")}}'
component: '{{inventory_hostname|regex_replace("mabos.+?\d+(\w+?)\d+$", "\1")}}'
...