'How to use arithmetic when setting a variable value in Ansible?
I would like to use a system fact for a host times a number/percentage as a base for a variable. What I am trying to do specifically is use the ansible_memtotal_mb value and multiply it by .80 to get a ramsize to then use in setting a Couchbase value. I have been trying different variations of the line below. I'm not ever sure that it is possible, but any help would be appreciated.
vars:
ramsize: '"{{ ansible_memtotal_mb }}" * .80'
Solution 1:[1]
One little thing to add. If you presume the math multiplication has precedence before jinja filter (| sign), you're wrong ;-)
With values like
total_rate: 150
host_ratio: 14 # percentual
"{{ total_rate*host_ratio*0.01|int }}" => 0 because 0.01|int = 0
"{{ (total_rate*host_ratio*0.01)|int) }}" => 21 as one expects
Sources
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Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 |