storing dynamic variables in salt

[Mano Nathan]

Hi,

How do i store some dynamic values in salt. For example, I want to cat /proc/meminfo and get the value and do some calculation for hugepages and store the value in /etc/sysctl.conf file. 

How can I do this in salt. Please advise. 

[Mano Nathan]

     How can i fix this 

        - Rendering SLS 'sysctl' failed, render error:

        - Jinja syntax error: unexpected char u'`' at 17; line 1

        -

        - ---

        - {% set s_raminkb=`/bin/cat /proc/meminfo | /bin/grep MemTotal: | /bin/awk -F ' ' '{print $2}'`}    <======================

[Vitaliy Fuks]

To run a command and use its output:

salt['cmd.run']('/bin/cat /proc/meminfo | /bin/grep MemTotal:').split(': ')[1]

though for your specific example, you could just use:

grains.get('mem_total')

--
You received this message because you are subscribed to the Google Groups "Salt-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to salt-users+...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Mano Nathan]

How do I dod the calculation and store the new value?

Do I need to use pillar? or any other technique. 

[Mano Nathan]

[root@nova ~]# salt 'client.example.com' grains.get mem_total

client.example.com:

    996

once I get the men total, I wanted to do the below calculation and store in hugepages. How can i archive this using salt? 

( 996 * 0.4 - 2097152 ) / 2048

[Arnold Bechtoldt]

You can find code examples at <https://github.com/saltstack-formulas>
and <https://github.com/bechtoldt?tab=repositories>.

--
Arnold Bechtoldt

Karlsruhe, Germany

Am 19.06.14 16:49, schrieb Mano Nathan:

>> send an email to salt-users+...@googlegroups.com <javascript:>.

>> For more options, visit https://groups.google.com/d/optout

>> <https://groups.google.com/d/optout>.

>
> --
> You received this message because you are subscribed to the Google
> Groups "Salt-users" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to salt-users+...@googlegroups.com

> <mailto:salt-users+...@googlegroups.com>.

[Mano Nathan]

{% set hugepages = (grains['mem_total'] * 1024 * 0.4 - 2097152 ) / 2048 %}

i am getting decimal number. How can i convert to whole digit? 

[Ryan Lane]

On Thu, Jun 19, 2014 at 11:40 AM, Mano Nathan <mha...@gmail.com> wrote:

{% set hugepages = (grains['mem_total'] * 1024 * 0.4 - 2097152 ) / 2048 %}

i am getting decimal number. How can i convert to whole digit? 

{% set hugepages = (grains['mem_total'] * 1024 * 0.4 - 2097152 ) / 2048 | float %}

See:

http://jinja.pocoo.org/docs/templates/#float

Or did you mean you wanted an int?

{% set hugepages = (grains['mem_total'] * 1024 * 0.4 - 2097152 ) / 2048 | int %}

- Ryan