condition based on register match

[דודו דודו‎]

I have a task that mounts devices in a Linux machine.

I wish to run the task only if the device is not mounted, therefore I'm running a mount command and save the output in a register. 

On the mount task, I'm trying to use when by searching the device in the register output - and I'm failing to do so.

The task is running even that /dev/sdb1 is included in the register  

Playbook:

  - name: check mount
    shell: mount | awk '{print $1}'
    register: mount

  - debug:
      msg: " {{ mount.stdout_lines }}"


  - name: Mount task 1 - create directory
    file:
      path: "{{item.mount_path}}"
      state: directory
    when: mount.stdout_lines != "/dev/sdb1"

Register output 

 sysfs\nproc\ndevtmpfs\nsecurityfs\ntmpfs\ndevpts\ntmpfs\ntmpfs\ncgroup\npstore\ncgroup\ncgroup\ncgroup\ncgroup\ncgroup\ncgroup\ncgroup\ncgroup\ncgroup\ncgroup\nconfigfs\n/dev/mapper/rhel-root\nselinuxfs\nsystemd-1\ndebugfs\nmqueue\nhugetlbfs\n/dev/sda1\n/dev/mapper/rhel-home\ntmpfs\n/dev/sdb1\n/dev/sdc1\n/dev/sdd1"

[Vladimir Botka]

On Sun, 26 Apr 2020 23:18:40 -0700 (PDT)
דודו דודו <dudu.c...@gmail.com> wrote:

> I have a task that mounts devices in a Linux machine.
> I wish to run the task only if the device is not mounted, therefore I'm
> running a mount command and save the output in a register.
>

> On the mount task, I'm trying to use *when *by searching the device in the

> register output - and I'm failing to do so.
> The task is running even that /dev/sdb1 is included in the register

The module "mount" does the job and creates the directory if needed.
https://docs.ansible.com/ansible/latest/modules/mount_module.html

"state: If mounted, the device will be actively mounted and appropriately
configured in fstab. If the mount point is not present, the mount point
will be created."

HTH,

-vlado

[Vladimir Botka]

On Sun, 26 Apr 2020 23:18:40 -0700 (PDT)
דודו דודו <dudu.c...@gmail.com> wrote:

> The task is running even that /dev/sdb1 is included in the register
>

> *Playbook:*

>
> - name: check mount
> shell: mount | awk '{print $1}'
> register: mount
>
> - debug:
> msg: " {{ mount.stdout_lines }}"
>
> - name: Mount task 1 - create directory
> file:
> path: "{{item.mount_path}}"
> state: directory
> when: mount.stdout_lines != "/dev/sdb1"

Correct syntax is below

- name: Mount task 1 - create directory
file:

path: /dev/sdb1
state: directory
when: "'/dev/sdb1' not in mount.stdout_lines"

The code implicates a loop

- name: Mount task 1 - create directory
file:
path: "{{ item.mount_path }}"
state: directory

loop: "{{ my_list_of_mountpoints }}"
when: "item.mount_path not in mount.stdout_lines"

(Ansible module "mount" does the job.)

HTH,

-vlado

[Vladimir Botka]

On Mon, 27 Apr 2020 09:05:26 +0200
Vladimir Botka <vbo...@gmail.com> wrote:

Errata:

> Correct syntax is below
>
> - name: Mount task 1 - create directory
> file:
> path: /dev/sdb1

path: "{{ mount_point_of_dev_sdb1 }}"

[Vladimir Botka]

On Mon, 27 Apr 2020 09:05:26 +0200
Vladimir Botka <vbo...@gmail.com> wrote:

Errata 2:

> The code implicates a loop
>
> - name: Mount task 1 - create directory
> file:
> path: "{{ item.mount_path }}"
> state: directory
> loop: "{{ my_list_of_mountpoints }}"
> when: "item.mount_path not in mount.stdout_lines"

when: "item.mount_device not in mount.stdout_lines"

[דודו דודו‎]

Hi , 

That's helpful, but is there an option to match partial string ?