Insifficient support for LVM in Ansible (2.9+)

[Rene van der Linden]

The LVM related modules filesystem and lvol

• https://docs.ansible.com/ansible/latest/modules/filesystem_module.html
• https://docs.ansible.com/ansible/latest/modules/lvol_module.html

are unable to manage xfs and swap filesystems on RHEL 7/8

When trying to grow an xfs filesystem using the filesystem module, an error occurs.

Underneath it's using xfs_growfs, but that command required a mountpoint. The module however provides the /dev path which isn't supported anymore

RHEL 8

Failure

# xfs_growfs /dev/vg.appl/lv.taopt

xfs_growfs: /dev/vg.appl/lv.taopt is not a mounted XFS filesystem

Working fine

# xfs_growfs /opt/testapp

meta-data=/dev/mapper/vg.appl-lv.taopt isize=512    agcount=6, agsize=32768 blks

         =                       sectsz=512   attr=2, projid32bit=1

         =                       crc=1        finobt=1, sparse=1, rmapbt=0

         =                       reflink=1

data     =                       bsize=4096   blocks=196608, imaxpct=25

         =                       sunit=0      swidth=0 blks

naming   =version 2              bsize=4096   ascii-ci=0, ftype=1

log      =internal log           bsize=4096   blocks=1368, version=2

         =                       sectsz=512   sunit=0 blks, lazy-count=1

realtime =none                   extsz=4096   blocks=0, rtextents=0

I was able to use the lvol module and the resizefs option, but filesystem clearly states in the documentation that it support xfs too

RHEL 7/8

The 2nd issue is resizing a swap partition. There seems to be no workaround as both filesystem and lvol module can't resize swap

Using filesystem to resize will display the message

"msg": "module does not support resizing swap filesystem yet."

and using lvol reports

"msg": "Unable to resize lv.paging00 to 4g", "rc": 5

Logged a support ticket at Red Hat, but they replied these are community managed modules and should therefore be fixed by the community.

Kind regards,

René

[Andreas Olsson]

tis 2020-02-25 klockan 04:00 -0800 skrev Rene van der Linden:
> ...

> Logged a support ticket at Red Hat, but they replied these are
> community managed modules and should therefore be fixed by the
> community.

Did Red Hat support actually use those words, that the modules *should*
be fixed by the community? Also, is there anything preventing Red Hat
from contributing to community managed modules?

// Andreas

[Rene van der Linden]

"filesystem module is a community-based module that is not authored or directly supported by Red Hat"

Together with a link to this community.

I'll pick it up with Red Hat, as I find the answer a little too easy :-)