[libvirt_manager] Use /sysroot as path with xfs_growfs

With OCP 4.20 the task fails with:-
xfs_growfs: / is not a mounted XFS filesystem
As it's changed now:-
$ sudo df / --output=fstype
Type
overlay
$ sudo df /sysroot --output=fstype
Type
xfs

while with 4.18 it used to be:-
$ df /sysroot --output=fstype
Type
xfs
$ df / --output=fstype
Type
xfs

Changing the command to use /sysroot as path which
works on both 4.20 and older OCP versions. Also run the
command with unshare --mount in seperate namespace.

Signed-off-by: Yatin Karel <[email protected]>

Author: karelyatin

roles/libvirt_manager/tasks/manage_vms.yml

@@ -84,7 +84,7 @@
   ansible.builtin.shell:
     cmd: >-
       ssh core@{{ vm_con_name }}
-      "sudo growpart /dev/sda {{ _root_part }}; sudo xfs_growfs /;"
+      "sudo growpart /dev/sda {{ _root_part }}; sudo unshare --mount -- bash -c 'mount -o remount,rw /sysroot && xfs_growfs /sysroot'"
 
 - name: "Manage ssh keys on {{ vm }}"
   when: