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Enabling JSON output in nft monitor should be possible via '-j' flag or at least 'nft monitor json', not 'nft monitor vm json' as it is now in RHEL8.

Upstream, there is 'nft monitor json'. Ideally '-j' should be respected and 'json' parameter be deprecated.

Fix sent upstream: https://marc.info/?l=netfilter-devel&m=156036046227680&w=2

Upstream commit to backport:

mmit cc1ea7ef36868c0708741392c99fcd2f2c395131
Author: Phil Sutter <phil>
Date:   Wed Jun 12 19:27:37 2019 +0200

    monitor: Accept -j flag
    
    Make 'nft -j monitor' equal to 'nft monitor json' and change
    documentation to use only the first variant since that is more intuitive
    and also consistent with other commands.
    
    While being at it, drop references to XML from monitor section - it was
    never supported.
    
    Signed-off-by: Phil Sutter <phil>
    Signed-off-by: Pablo Neira Ayuso <pablo>

Implicitly resolved by rebase.

Tomas,

Can we cover for this in RHEL-8.2.0? For testing, it should suffice to make sure that 'nft -j monitor' will print JSON output.

Cheers, Phil

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2020:1774