On Mon, Sep 28, 2020 at 07:57:13AM -0500, Ian Pilcher wrote:
> On 9/28/20 6:47 AM, Zbigniew Jędrzejewski-Szmek wrote:
> > Instructions were already posted by Vitaly, so I won't repeat that here.
> > I'll just note that the scriptlet in systemd.rpm looks for
> > 'Generated by NetworkManager' in /etc/resolv.conf as an indicator that
> > the file is autogenerated.
> 
> Which is a terrible idea, as has been previously mentioned.  It really
> only indicates that the file was once touched my NetworkManager, not
> that it is currently managed.
> 
> If often let Anaconda set up a new system witha  NetworkManager-managed
> DHCP and then convert to a legacy network scripts-managed static IP
> later.  This doesn't change the DNS server or domain, so I don't bother
> editing resolv.conf to remove this comment.  I'm relatively certain that
> this is a common pattern.

  Having read your email, I've checked my /etc/resolv.conf and _removed_
the NM comment.  Never bothered to touch the comment before, as I'm using
systemd-networkd for networking on the server. I would say that leaving
the comment is a common pattern.
  There's not much there actually, only search domain and 'nameserver ::1',
where dnsmasq listens, providing split-horizon for my network and pihole
blacklisting of advertisment networks.
  But yeah, there are no better ideas how to handle resolv.conf on upgrades.

-- 
Tomasz Torcz               “Never underestimate the bandwidth of a station
to...@pipebreaker.pl        wagon filled with backup tapes.”  — Jim Gray
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