[ansible-project] how to determine group's id?

[Laci]

Do you guys have a good idea what is the best way to determine a group's id 
them reuse that in a variable?

For ex:
% getent group monitor
monitor:x:990:polkitd

I need 990, then I have to add a line to /etc/fstab including 990
Thanks!

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Re: [ansible-project] how to determine group's id?

[Vladimir Botka]

On Tue, 14 Jul 2020 23:02:56 +0200
Jean-Yves LENHOF  wrote:

> Hi, Not tested, but should be closed to what you're looking into : - 
> getent: database: group key: monitor split: ':' - debug: var: 
> getent_group[1]

For example

  - getent:
  database: group
  - debug:
  var: getent_group.nobody

gives

  getent_group.nobody:
  - '*'
  - '65534'

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Re: [ansible-project] how to determine group's id?

[Jean-Yves LENHOF]

Hi, Not tested, but should be closed to what you're looking into : - 
getent: database: group key: monitor split: ':' - debug: var: 
getent_group[1]



Regards,

JYL


Le 14/07/2020 à 21:58, Laci a écrit :
Do you guys have a good idea what is the best way to determine a 
group's id them reuse that in a variable?


For ex:
% getent group monitor
monitor:x:990:polkitd

I need 990, then I have to add a line to /etc/fstab including 990
Thanks!
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Groups "Ansible Project" group.
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.


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Re: [ansible-project] how to determine group's id?

[Laci]

Thank you guys, this fixes the first part.
But how do I reuse the output of getent, I tried, the following but didn't 
work

 - getent:
  database: group
  - debug:
  var: getent_group.monitor

  - name: add line to fstab
lineinfile:
  path: /etc/fstab
  line: proc/procprocdefaults,hidepid=2,gid={{ var }}
 0 0

"The task includes an option with an undefined variable. The error was: 
'var' is undefined

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Re: [ansible-project] how to determine group's id?

[Vladimir Botka]

On Wed, 15 Jul 2020 06:34:10 -0700 (PDT)
Laci  wrote:

>   - name: add line to fstab
> lineinfile:
>   path: /etc/fstab
>   line: proc/procprocdefaults,hidepid=2,gid={{ var }}

Use "mount". It will create the entry in fstab
https://docs.ansible.com/ansible/latest/modules/mount_module.html

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Re: [ansible-project] how to determine group's id?

[Vladimir Botka]

On Wed, 15 Jul 2020 06:34:10 -0700 (PDT)
Laci  wrote:

>  - getent:
>   database: group
>   - debug:
>   var: getent_group.monitor
> 
>   - name: add line to fstab
> lineinfile:
>   path: /etc/fstab
>   line: proc/procprocdefaults,hidepid=2,gid={{ var }}
>  0 0

Set the variable first. "gid" is the second item in the list. For example

- getent:
database: group
- set_fact:
my_gid: "{{ getent_group.monitor.1 }}"

See if this is what you want

- debug:
var: my_gid

Then use this variable to mount procfs. For example

- mount:
path: proc
src: /proc
fstype: proc
opts: "defaults,hidepid=2,gid={{ my_gid }}"
dump: 0
passno: 0
backup: true
state: mounted

(not tested)

It's a good idea to "backup: true" /etc/fstab. Take a look at the parameter
"state" and decide when you want to mount procfs.

Check the playbook first and see what's going to be changed

shell> ansible-playbook pb.yml -CD

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