How do I round a value in Jinja?

Archives Ansible Project
1

Hi,

I’ve got a template which does a few calculations on memory (to set up hugepages etc), and I need to round the result but I’m not sure how to.

`
This is the expression:

“{{ (((60/100)* ansible_memtotal_mb)*1024)/2048 }}”

`

I usually end up with a decimal, but I need to get rid of the decimal:

`
Result: 600.6 and I’d like to round that to 601

Result: 1201.1 should be rounded to 1201
`
etc

Any idea on how to do that?

Thanks!
/M

2

You are looking for the aptly named “round” filter:

http://jinja.pocoo.org/docs/dev/templates/#round

some_val|round

3

Doh!

Awesome, that did the trick.

someval |round|int

Thanks!
/M

4

Have a look at the '//' operator :
http://jinja.pocoo.org/docs/dev/templates/#math

- it rounds down, but saves the extra step.

5

Hi,

Please take a look at this example:

innodb_buffer_pool_size = {{
(0.85*ansible_memtotal_mb/1024)|int }}G

As a result I get:
innodb_buffer_pool_size = 120G

6

Hi,

Yeah it’s already sorted, but thanks!

/M