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Description of problem: VDO ansible module should have no mentions of --readCache. For more details on --readCache removal see BZ 1639792. Version-Release number of selected component (if applicable): vdo-6.2.0.293-10.el8.x86_64 How reproducible: 100% Steps to Reproduce: 1.grep -R readCache /usr/share/doc/vdo 2.grep -R "read cache" /usr/share/doc/vdo Actual results: # grep -R readCache /usr/share/doc/vdo /usr/share/doc/vdo/examples/ansible/vdo.py: options.append("--readCache=enabled") /usr/share/doc/vdo/examples/ansible/vdo.py: options.append("--readCacheSize=" + params['readcachesize']) # grep -R "read cache" /usr/share/doc/vdo /usr/share/doc/vdo/examples/ansible/vdo.py: - Enables or disables the read cache. The default is /usr/share/doc/vdo/examples/ansible/vdo.py: 'disabled'. Choosing 'enabled' enables a read cache /usr/share/doc/vdo/examples/ansible/vdo.py: - Specifies the extra VDO device read cache size in /usr/share/doc/vdo/examples/ansible/vdo.py: with 4 bio threads will have a read cache memory usage /usr/share/doc/vdo/examples/ansible/vdo.py: overhead of 4.5 MB per 1 MB of read cache specified). Expected results: nothing Additional info:
The design of the VDO Ansible module is to be able to work with multiple versions of VDO, which may remove non-required options. In the case of the "--readCache" and "--readCacheSize" options, if the playbook specifies these options, VDO on RHEL 8 would return the error "vdo create: error: unrecognized arguments", with the arguments used. This would be an indication to the user that the version of VDO does not support the "--readCache" or "--readCacheSize" options. The above would be a more consistent and informative failure mode for the user The VDO Ansible module has been a part of upstream Ansible since version 2.5.
BZ 1669534 calls for the removal of the "vdo.py" Ansible module from the VDO package, which satisfies the removal of the "--readCache" option as stated above. Closing this BZ as a duplicate. *** This bug has been marked as a duplicate of bug 1669534 ***