Re: Why does resolv.conf keep changing?

From	Roberto C. Sánchez <roberto@debian.org>
Newsgroups	linux.debian.user
Subject	Re: Why does resolv.conf keep changing?
Date	2017-10-26 17:00 +0200
Message-ID	<uERNv-6CV-7@gated-at.bofh.it> (permalink)
References	(5 earlier) <uEHbr-au-3@gated-at.bofh.it> <uENTA-4ic-5@gated-at.bofh.it> <uEOwh-4Mp-3@gated-at.bofh.it> <uEOPD-4Sy-5@gated-at.bofh.it> <uERu9-6wp-7@gated-at.bofh.it>
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On Thu, Oct 26, 2017 at 09:31:47AM -0500, David Wright wrote:
> 
> Judging by your address and earlier comment, you're much closer to
> Debian's strategy than I am, but I thought the thrust of Debian was
> to coerce/persuade packages to cooperate on /etc/resolv.conf so that
> one package did not overwrite the actions of another on starting,
> and could unroll their own changes when terminating. It's always
> worked here with ifup and dhclient, but that's less complex than
> your own situation using bind. (I use /etc/hosts for my own LAN.)
> 
You make a good point.  However, I think that requiring the user/admin
to implement a hook script in order to reliably get dhclient to do the
right thing is a bit much.  That is why I made the suggestion about the
configuration directive.

> 
> An official hack (Debian) rather than an unofficial one (sys admin)?
> The most remarkable thing in this thread is the alleged defeat of
> chattr +i. (a) it's difficult to believe that some package comes
> along and unsets i (immutable attribute), changes the file, and sets
> i again, which is what you allege. (b) although I agreed with Gene
> that a watch could be left untriggered by i being set, this would
> only happen if a package tried to naively change resolv.conf; the
> behaviour alleged in (a) would still trigger the watch at the time
> i was temporarily unset. (c) the third alternative is failure of
> i to do its job, which seems unlikely.
> 
I had several terminal windows open and I am beginning to suspect that I
was mistaken (at least initially) about having set +i.  In particular,
when I later tried again (possibly for the first time it now seems) I
observed that new temporary files were littered in /etc after the
dhclient-script attempt to overwrite the original /etc/resolv.conf
failed.  I am going to just call it user error on my part.

> So perhaps Debian should just adopt chattr +i as the official way
> of doing what Gene, Greg and you want, with a warning that you
> might want to clean up any clutter (resolv.conf.foo…) periodically.
> Anything that interfered with that could then be filed as a bug.
> 
I do not find this a particularly good solution because it would likely
interfere with managing a system via puppet, ansible, etc.  There is
definitely a use case for "this file should be changeable only by the
administrator, not by any automated functionality from an installed
package."

> BTW did you find out why you were getting DHCP negotiations
> every 3 or 4 minutes? The lease you posted was for 16005 seconds,
> over 4 hours.
> 
I don't recall this being a problem except for when I manually ran
dhclient to force a new negotiation.  I have not observed anything that
makes me think there is an issue with premature renegotiation.

Regards,

-Roberto

-- 
Roberto C. Sánchez

Thread

Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-23 04:20 +0200
  Re: Why does resolv.conf keep changing? Joe <joe@jretrading.com> - 2017-10-23 11:00 +0200
    Re: Why does resolv.conf keep changing? <tomas@tuxteam.de> - 2017-10-23 11:50 +0200
      Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-24 01:40 +0200
        Re: Why does resolv.conf keep changing? David Wright <deblis@lionunicorn.co.uk> - 2017-10-24 02:30 +0200
          Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-24 05:10 +0200
            Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-24 09:20 +0200
              Re: Why does resolv.conf keep changing? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-24 14:20 +0200
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-24 14:30 +0200
                Re: Why does resolv.conf keep changing? Curt <curty@free.fr> - 2017-10-24 19:10 +0200
              Re: Why does resolv.conf keep changing? David Wright <deblis@lionunicorn.co.uk> - 2017-10-24 18:50 +0200
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-25 15:30 +0200
                Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-25 15:40 +0200
                Re: Why does resolv.conf keep changing? David Wright <deblis@lionunicorn.co.uk> - 2017-10-25 20:50 +0200
              Re: Why does resolv.conf keep changing? Roger Lynn <Roger@rilynn.me.uk> - 2017-10-25 00:30 +0200
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-25 04:10 +0200
    Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-23 13:00 +0200
    Re: Why does resolv.conf keep changing? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-23 18:10 +0200
    Re: Why does resolv.conf keep changing? Jude DaShiell <jdashiel@panix.com> - 2017-10-23 18:10 +0200
      Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-23 23:10 +0200
        Re: Why does resolv.conf keep changing? Dan Ritter <dsr@randomstring.org> - 2017-10-24 00:00 +0200
          Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-24 02:40 +0200
            Re: Why does resolv.conf keep changing? Michael Stone <mstone@debian.org> - 2017-10-25 03:20 +0200
              Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-25 05:00 +0200
                Re: Why does resolv.conf keep changing? Michael Stone <mstone@debian.org> - 2017-10-25 05:10 +0200
                Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-25 06:20 +0200
                Re: Why does resolv.conf keep changing? Michael Stone <mstone@debian.org> - 2017-10-25 13:40 +0200
                Re: Why does resolv.conf keep changing? Alberto Luaces <aluaces@udc.es> - 2017-10-25 14:10 +0200
                Re: Why does resolv.conf keep changing? Michael Stone <mstone@debian.org> - 2017-10-25 15:30 +0200
                Re: Why does resolv.conf keep changing? <tomas@tuxteam.de> - 2017-10-25 15:50 +0200
                Re: Why does resolv.conf keep changing? Curt <curty@free.fr> - 2017-10-25 16:30 +0200
                Re: Why does resolv.conf keep changing? Joe <joe@jretrading.com> - 2017-10-25 17:10 +0200
                Re: Why does resolv.conf keep changing? <tomas@tuxteam.de> - 2017-10-25 17:30 +0200
                Re: Why does resolv.conf keep changing? rhkramer@gmail.com - 2017-10-25 19:00 +0200
                Re: Why does resolv.conf keep changing? <tomas@tuxteam.de> - 2017-10-25 19:10 +0200
                Re: Why does resolv.conf keep changing? rhkramer@gmail.com - 2017-10-25 19:40 +0200
                Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-25 14:20 +0200
                Re: Why does resolv.conf keep changing? Felix Miata <mrmazda@earthlink.net> - 2017-10-25 05:50 +0200
                Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-25 13:40 +0200
                Re: Why does resolv.conf keep changing? <tomas@tuxteam.de> - 2017-10-25 14:00 +0200
                Re: Why does resolv.conf keep changing? tomas@tuxteam.de - 2017-10-25 14:20 +0200
                Re: Why does resolv.conf keep changing? Nicolas George <george@nsup.org> - 2017-10-25 14:50 +0200
                Re: Why does resolv.conf keep changing? Joe <joe@jretrading.com> - 2017-10-25 14:10 +0200
                Re: Why does resolv.conf keep changing? <tomas@tuxteam.de> - 2017-10-25 14:20 +0200
                Re: Why does resolv.conf keep changing? Joe <joe@jretrading.com> - 2017-10-25 15:00 +0200
                Re: Why does resolv.conf keep changing? Dan Ritter <dsr@randomstring.org> - 2017-10-25 17:10 +0200
                Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-25 18:50 +0200
                Re: Why does resolv.conf keep changing? Don Armstrong <don@debian.org> - 2017-10-25 21:30 +0200
                Re: Why does resolv.conf keep changing? Michael Stone <mstone@debian.org> - 2017-10-25 13:40 +0200
              Re: Why does resolv.conf keep changing? Glenn English <ghe2001@gmail.com> - 2017-10-26 17:40 +0200
                Re: Why does resolv.conf keep changing? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-26 17:50 +0200
                Re: Why does resolv.conf keep changing? The Wanderer <wanderer@fastmail.fm> - 2017-10-26 18:00 +0200
                Re: Why does resolv.conf keep changing? Nicholas Geovanis <nickgeovanis@gmail.com> - 2017-10-26 18:20 +0200
                Re: Why does resolv.conf keep changing? Nicholas Geovanis <nickgeovanis@gmail.com> - 2017-10-26 18:40 +0200
                Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-27 02:00 +0200
                Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-27 02:00 +0200
  Re: Why does resolv.conf keep changing? Jörg-Volker Peetz <jvpeetz@web.de> - 2017-10-23 12:10 +0200
  Re: Why does resolv.conf keep changing? Stefan Monnier <monnier@iro.umontreal.ca> - 2017-10-25 05:50 +0200
    Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-25 06:10 +0200
      Re: Why does resolv.conf keep changing? Stefan Monnier <monnier@iro.umontreal.ca> - 2017-10-25 06:50 +0200
        Re: Why does resolv.conf keep changing? Curt <curty@free.fr> - 2017-10-25 08:50 +0200
          Re: Why does resolv.conf keep changing? Stefan Monnier <monnier@iro.umontreal.ca> - 2017-10-25 14:40 +0200
            Re: Why does resolv.conf keep changing? <tomas@tuxteam.de> - 2017-10-25 14:50 +0200
              Re: Why does resolv.conf keep changing? Stefan Monnier <monnier@iro.umontreal.ca> - 2017-10-25 15:00 +0200
                Re: Why does resolv.conf keep changing? <tomas@tuxteam.de> - 2017-10-25 15:10 +0200
              Re: Why does resolv.conf keep changing? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-25 15:10 +0200
                Re: Why does resolv.conf keep changing? <tomas@tuxteam.de> - 2017-10-25 15:10 +0200
                Re: Why does resolv.conf keep changing? Michael Stone <mstone@debian.org> - 2017-10-25 15:30 +0200
                Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-25 15:30 +0200
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-25 16:10 +0200
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-25 16:10 +0200
                [SOLVED] Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-25 20:30 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Michael Stone <mstone@debian.org> - 2017-10-25 20:40 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-25 20:40 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-25 21:00 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-25 21:00 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-26 15:10 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-26 15:40 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-26 16:00 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Don Armstrong <don@debian.org> - 2017-10-26 21:40 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-26 21:40 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Nicholas Geovanis <nickgeovanis@gmail.com> - 2017-10-26 16:30 +0200
                The new normal of logging Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2017-10-26 21:10 +0200
                Re: The new normal of logging Nicholas Geovanis <nickgeovanis@gmail.com> - 2017-10-26 21:30 +0200
                Re: The new normal of logging Gene Heskett <gheskett@shentel.net> - 2017-10-27 02:10 +0200
                Re: The new normal of logging Ben Caradoc-Davies <ben@transient.nz> - 2017-10-27 03:30 +0200
                Re: The new normal of logging Gene Heskett <gheskett@shentel.net> - 2017-10-27 07:00 +0200
                Re: The new normal of logging Ben Caradoc-Davies <ben@transient.nz> - 2017-10-28 04:50 +0200
                Re: The new normal of logging Gene Heskett <gheskett@shentel.net> - 2017-10-28 08:10 +0200
                Re: The new normal of logging Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-10-27 04:10 +0200
                Re: The new normal of logging Darac Marjal <mailinglist@darac.org.uk> - 2017-10-27 11:40 +0200
                Plain text vs. binary (was Re: The new normal of logging) The Wanderer <wanderer@fastmail.fm> - 2017-10-27 14:40 +0200
                Re: The new normal of logging Roberto C. Sánchez <roberto@debian.org> - 2017-10-26 21:30 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-27 17:10 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-27 17:50 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Curt <curty@free.fr> - 2017-10-27 20:30 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Brian <ad44@cityscape.co.uk> - 2017-10-27 20:50 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Curt <curty@free.fr> - 2017-10-27 21:50 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-27 22:00 +0200
                Re: [SOLVED] Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-28 18:30 +0200
                Re: Why does resolv.conf keep changing? Stefan Monnier <monnier@iro.umontreal.ca> - 2017-10-26 05:40 +0200
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-26 12:50 +0200
                Re: Why does resolv.conf keep changing? Darac Marjal <mailinglist@darac.org.uk> - 2017-10-26 13:30 +0200
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-26 13:50 +0200
                Re: Why does resolv.conf keep changing? David Wright <deblis@lionunicorn.co.uk> - 2017-10-26 16:40 +0200
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-26 17:00 +0200
                Re: Why does resolv.conf keep changing? Mart van de Wege <mvdwege@gmail.com> - 2017-10-27 10:10 +0200
                Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-27 13:50 +0200
                Re: Why does resolv.conf keep changing? Darac Marjal <mailinglist@darac.org.uk> - 2017-10-27 14:20 +0200
                Re: Why does resolv.conf keep changing? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-27 14:40 +0200
                Re: Why does resolv.conf keep changing? David Wright <deblis@lionunicorn.co.uk> - 2017-10-27 20:50 +0200
                Re: Why does resolv.conf keep changing? David Wright <deblis@lionunicorn.co.uk> - 2017-10-27 20:50 +0200
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-27 16:20 +0200
                Re: Why does resolv.conf keep changing? Mart van de Wege <mvdwege@gmail.com> - 2017-10-28 00:10 +0200
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-28 00:10 +0200
                Re: Why does resolv.conf keep changing? David Wright <deblis@lionunicorn.co.uk> - 2017-10-28 02:00 +0200
                Re: Why does resolv.conf keep changing? Mart van de Wege <mvdwege@gmail.com> - 2017-10-28 15:30 +0200
                Re: Why does resolv.conf keep changing? Glenn English <ghe2001@gmail.com> - 2017-10-28 18:50 +0200
                Re: Why does resolv.conf keep changing? Mart van de Wege <mvdwege@gmail.com> - 2017-10-28 15:40 +0200
                Re: Why does resolv.conf keep changing? Stefan Monnier <monnier@iro.umontreal.ca> - 2017-10-27 16:40 +0200
                Re: Why does resolv.conf keep changing? Mart van de Wege <mvdwege@gmail.com> - 2017-10-28 00:10 +0200
                Re: Why does resolv.conf keep changing? Stefan Monnier <monnier@iro.umontreal.ca> - 2017-10-27 16:30 +0200
                Re: Why does resolv.conf keep changing? Michael Stone <mstone@debian.org> - 2017-10-28 02:40 +0200
                Re: Why does resolv.conf keep changing? Stefan Monnier <monnier@iro.umontreal.ca> - 2017-10-26 14:40 +0200
                Re: Why does resolv.conf keep changing? Roger Lynn <Roger@rilynn.me.uk> - 2017-11-04 00:30 +0100
                Re: Why does resolv.conf keep changing? <tomas@tuxteam.de> - 2017-11-04 08:50 +0100
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-11-04 13:10 +0100
                Re: Why does resolv.conf keep changing? Brian <ad44@cityscape.co.uk> - 2017-11-04 22:00 +0100
                Re: Why does resolv.conf keep changing? <tomas@tuxteam.de> - 2017-11-04 22:10 +0100
                Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-11-04 22:10 +0100
                Re: Why does resolv.conf keep changing? Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-11-04 15:40 +0100
                Re: Why does resolv.conf keep changing? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-26 15:30 +0200
              Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-25 15:30 +0200
            Re: Why does resolv.conf keep changing? Gene Heskett <gheskett@shentel.net> - 2017-10-25 15:00 +0200
              Re: Why does resolv.conf keep changing? Stefan Monnier <monnier@iro.umontreal.ca> - 2017-10-25 15:30 +0200
        Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-25 15:10 +0200
          Re: Why does resolv.conf keep changing? Stefan Monnier <monnier@iro.umontreal.ca> - 2017-10-25 15:30 +0200
            Re: Why does resolv.conf keep changing? Roberto C. Sánchez <roberto@debian.org> - 2017-10-25 16:20 +0200

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