fail to use gzip when try to use Leverage compression accelerator (CentOS 7)

[Boxiang Zhu]

OS: CentOS Linux release 7.6.1810 (Core)
Kernel: 3.10.0-957.el7.x86_64
OpenStack Version: Train
Deploy Tool: kolla-ansible All-In-One Mode
You can see the globals.yml from attachment.

I just want to use the new feature http://specs.openstack.org/openstack/cinder-specs/specs/train/leverage-compression-accelerator.html
But after these steps, I met an error.
1. Download the cirros image and upload the image
2. Create a volume using this image as a bootable volume
3. Then at last, I use CLI "upload-to-image <volume-id> <new-image-name> --container-format compressed"

I got the error info from cinder-volume.log
===========================================

2020-02-06 10:29:11.012 37 INFO cinder.image.image_utils [req-9875a2fe-ed6e-4ad5-970e-3cd2167bb01e be2f14b985a244808f9a54e78d9f6fb7 2d3f871763e3434fb5d6597b9b644587 - default default] Converted 1024.00 MB image at 1024.00 MB/s
2020-02-06 10:29:12.384 37 ERROR cinder.image.accelerators.qat [req-9875a2fe-ed6e-4ad5-970e-3cd2167bb01e be2f14b985a244808f9a54e78d9f6fb7 2d3f871763e3434fb5d6597b9b644587 - default default] QATzip package is not installed.: ProcessExecutionError: Unexpected error while running command.
2020-02-06 10:29:14.185 37 ERROR cinder.volume.manager [req-9875a2fe-ed6e-4ad5-970e-3cd2167bb01e be2f14b985a244808f9a54e78d9f6fb7 2d3f871763e3434fb5d6597b9b644587 - default default] Upload volume to image encountered an error (image-id: 9e58527b-5fc5-4625-babf-fe2b829f2483).: CinderAcceleratorError: Cinder accelerator GZIP encountered an error while compressing/decompressing image.
2020-02-06 10:29:14.186 37 INFO cinder.message.api [req-9875a2fe-ed6e-4ad5-970e-3cd2167bb01e be2f14b985a244808f9a54e78d9f6fb7 2d3f871763e3434fb5d6597b9b644587 - default default] Creating message record for request_id = req-9875a2fe-ed6e-4ad5-970e-3cd2167bb01e
2020-02-06 10:29:14.304 37 WARNING cinder.volume.manager [req-9875a2fe-ed6e-4ad5-970e-3cd2167bb01e be2f14b985a244808f9a54e78d9f6fb7 2d3f871763e3434fb5d6597b9b644587 - default default] Deleting image in unexpected status: queued.: CinderAcceleratorError: Cinder accelerator GZIP encountered an error while compressing/decompressing image.
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server [req-9875a2fe-ed6e-4ad5-970e-3cd2167bb01e be2f14b985a244808f9a54e78d9f6fb7 2d3f871763e3434fb5d6597b9b644587 - default default] Exception during message handling: CinderAcceleratorError: Cinder accelerator GZIP encountered an error while compressing/decompressing image.
Command ['gzip', '-k', '/var/lib/cinder/conversion/tmp_K7_FI'] execution failed.
Volume compression failed while uploading to glance. GZIP compression command failed.
Reason: /bin/gzip: invalid option -- 'k'
Try `gzip --help' for more information.
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 165, in _process_incoming
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server res = self.dispatcher.dispatch(message)
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 274, in dispatch
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server return self._do_dispatch(endpoint, method, ctxt, args)
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 194, in _do_dispatch
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server result = func(ctxt, **new_args)
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/cinder/volume/manager.py", line 1687, in copy_volume_to_image
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server payload['message'] = six.text_type(error)
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server self.force_reraise()
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb)
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/cinder/volume/manager.py", line 1668, in copy_volume_to_image
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server image_service, image_meta)
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/cinder/volume/drivers/rbd.py", line 1595, in copy_volume_to_image
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server image_meta, tmp_file)
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/cinder/image/image_utils.py", line 716, in upload_volume
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server accel.compress_img(run_as_root=run_as_root)
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/cinder/image/accelerator.py", line 91, in compress_img
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server run_as_root)
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/cinder/image/accelerators/gzip.py", line 55, in compress_img
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server reason=ex.stderr)
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server CinderAcceleratorError: Cinder accelerator GZIP encountered an error while compressing/decompressing image.
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server Command ['gzip', '-k', '/var/lib/cinder/conversion/tmp_K7_FI'] execution failed.
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server Volume compression failed while uploading to glance. GZIP compression command failed.
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server Reason: /bin/gzip: invalid option -- 'k'
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server Try `gzip --help' for more information.
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server
2020-02-06 10:29:14.540 37 ERROR oslo_messaging.rpc.server
2020-02-06 10:29:16.795 37 INFO cinder.volume.manager [req-c9d45b21-4f50-46a2-8305-4f1b524a7a90 be2f14b985a244808f9a54e78d9f6fb7 2d3f871763e3434fb5d6597b9b644587 - default default] Deleted volume successfully.

[Boxiang Zhu (bxzhu-5355)]

I run `gzip --help` and `gzip --version`, result as followed:
[root@aio ~]# gzip --help
Usage: gzip [OPTION]... [FILE]...
Compress or uncompress FILEs (by default, compress FILES in-place).

Mandatory arguments to long options are mandatory for short options too.

  -c, --stdout write on standard output, keep original files unchanged
  -d, --decompress decompress
  -f, --force force overwrite of output file and compress links
  -h, --help give this help
  -l, --list list compressed file contents
  -L, --license display software license
  -n, --no-name do not save or restore the original name and time stamp
  -N, --name save or restore the original name and time stamp
  -q, --quiet suppress all warnings
  -r, --recursive operate recursively on directories
  -S, --suffix=SUF use suffix SUF on compressed files
  -t, --test test compressed file integrity
  -v, --verbose verbose mode
  -V, --version display version number
  -1, --fast compress faster
  -9, --best compress better
    --rsyncable Make rsync-friendly archive

With no FILE, or when FILE is -, read standard input.

Report bugs to <email address hidden>.
[root@aio ~]# gzip --version
gzip 1.5
Copyright (C) 2007, 2010, 2011 Free Software Foundation, Inc.
Copyright (C) 1993 Jean-loup Gailly.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.

Written by Jean-loup Gailly.

I have a server Ubuntu 18.04, then I run the same commands, the result as followed:
$ gzip --help
Usage: gzip [OPTION]... [FILE]...
Compress or uncompress FILEs (by default, compress FILES in-place).

Mandatory arguments to long options are mandatory for short options too.

  -c, --stdout write on standard output, keep original files unchanged
  -d, --decompress decompress
  -f, --force force overwrite of output file and compress links
  -h, --help give this help
  -k, --keep keep (don't delete) input files
  -l, --list list compressed file contents
  -L, --license display software license
  -n, --no-name do not save or restore the original name and time stamp
  -N, --name save or restore the original name and time stamp
  -q, --quiet suppress all warnings
  -r, --recursive operate recursively on directories
  -S, --suffix=SUF use suffix SUF on compressed files
  -t, --test test compressed file integrity
  -v, --verbose verbose mode
  -V, --version display version number
  -1, --fast compress faster
  -9, --best compress better
  --rsyncable Make rsync-friendly archive

With no FILE, or when FILE is -, read standard input.

Report bugs to <email address hidden>.

# boxiang @ ZBX-DEV in ~ [11:04:48]
$ gzip --version
gzip 1.6
Copyright (C) 2007, 2010, 2011 Free Software Foundation, Inc.
Copyright (C) 1993 Jean-loup Gailly.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted...

[Eric Harney (eharney)]

The gzip command on el7 doesn't support "-k" (--keep).

[Eric Harney (eharney)]

This option was added in gzip 1.6. CentOS 7 uses gzip 1.5.

[Boxiang Zhu (bxzhu-5355)]

Yes. So I think of two ways to solve the problem.
1. I do not use the "-k". Option "-k" is just to keep the orgin file. So we can copy it with "cp" command and then use "gzip" command without "-k" option;
2. We can just add some WARN info in the openstack docs, mark the version of gzip(>=1.6) to use;

anything else?