Re: [RFC PATCH] fstests: Request inferred user

[Jeff Layton <jlayton@kernel.org>]

On Wed, 2023-08-30 at 18:53 -0500, Frederick Lawler wrote:
> Currently when running make fstests for bare-metal setups, the data_user
> 'vagrant' is set for the /data partition. This is currently set as the default
> data_user. We have the option to edit this in extra_vars.yml.
> 
> make linux checks for an inferred user prior to setting the uid/gid for
> the /data partition.
> 
> In the situation where we don't add the 'vagrant' user to the
> bare-metal, we get a "user does not exist" on make fstests.
> 
> In both cases we do not want to switch users between the two targets,
> nor do we want to necessarily ensure that the 'vagrant' user exists on
> the metal. Therefore, request the inferred user on make fstests.
> 
> Signed-off-by: Frederick Lawler <fred@cloudflare.com>
> ---
> Since this is essentially in two places, I figure this should be more
> generic and then included in other make targets like cxl. But this is to
> get the discussion going if this or some other generic approach is
> preferred.
> ---
>  playbooks/roles/fstests/tasks/main.yml | 37 ++++++++++++++++++++++++++
>  1 file changed, 37 insertions(+)
> 
> diff --git a/playbooks/roles/fstests/tasks/main.yml b/playbooks/roles/fstests/tasks/main.yml
> index e2d7ce5295b7..2898833b0732 100644
> --- a/playbooks/roles/fstests/tasks/main.yml
> +++ b/playbooks/roles/fstests/tasks/main.yml
> @@ -10,6 +10,43 @@
>        skip: true
>    tags: vars
>  
> +- name: Get username we are using
> +  command:
> +    cmd: whoami
> +  register: username_on_target
> +  when:
> +    - infer_uid_and_group|bool
> +
> +- name: Set target user as a fact
> +  set_fact:
> +    target_user: "{{ username_on_target.stdout }}"
> +  when:
> +    - infer_uid_and_group|bool
> +
> +- name: Run getent against the inferred target user
> +  getent:
> +    database: passwd
> +    key: "{{ target_user }}"
> +  register: getent_running_user
> +  when:
> +    - infer_uid_and_group|bool
> +
> +- name: Run getent against the inferred target group
> +  getent:
> +    database: group
> +    key: "{{ target_user }}"
> +  register: getent_on_group
> +  when:
> +    - infer_uid_and_group|bool
> +
> +- name: Override user and group with inferred settings if feature is enabled
> +  set_fact:
> +    user: "hplip"

Why "hplip" here?

> +    data_user: "{{ target_user }}"
> +    data_group: "{{ ((getent_on_group.values() | first).values() | first).keys() | first }}"
> +  when:
> +    - infer_uid_and_group|bool
> +
>  - include_role:
>      name: create_data_partition
>    tags: [ 'oscheck', 'data_partition' ]

-- 
Jeff Layton <jlayton@kernel.org>