[Bug 1713803] Re: replacement of resolvconf with systemd needs integration

[Mathieu Trudel-Lapierre]

sendmail only uses an update-libc.d script to reload the daemon on
changes to resolv.conf, which should be sufficient for DNS resolution to
remain working as it did with resolvconf; seeing as the nameserver will
generally not change from 127.0.0.53

** Changed in: sendmail (Ubuntu)
       Status: New => Invalid

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Title:
  replacement of resolvconf with systemd needs integration

Status in android-androresolvd package in Ubuntu:
  Triaged
Status in avahi package in Ubuntu:
  Triaged
Status in bind9 package in Ubuntu:
  Triaged
Status in cloud-init package in Ubuntu:
  Incomplete
Status in cloud-initramfs-tools package in Ubuntu:
  Invalid
Status in dhcpcd5 package in Ubuntu:
  Confirmed
Status in dibbler package in Ubuntu:
  Won't Fix
Status in dnscrypt-proxy package in Ubuntu:
  Confirmed
Status in dnsmasq package in Ubuntu:
  Invalid
Status in dnssec-trigger package in Ubuntu:
  Invalid
Status in fetchmail package in Ubuntu:
  Confirmed
Status in freedombox-setup package in Ubuntu:
  Confirmed
Status in initramfs-tools package in Ubuntu:
  Confirmed
Status in isc-dhcp package in Ubuntu:
  Fix Released
Status in ndisc6 package in Ubuntu:
  Fix Released
Status in netscript-2.4 package in Ubuntu:
  Won't Fix
Status in open-iscsi package in Ubuntu:
  Triaged
Status in openvpn package in Ubuntu:
  Confirmed
Status in postfix package in Ubuntu:
  Invalid
Status in pppconfig package in Ubuntu:
  Confirmed
Status in pump package in Ubuntu:
  Confirmed
Status in resolvconf package in Ubuntu:
  Invalid
Status in sendmail package in Ubuntu:
  Invalid
Status in squid3 package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  Invalid
Status in unbound package in Ubuntu:
  New
Status in vpnc package in Ubuntu:
  Invalid
Status in vpnc-scripts package in Ubuntu:
  Invalid
Status in whereami package in Ubuntu:
  Triaged

Bug description:
  There is a plan to remove resolvconf from the Ubuntu Server image.
  resolvconf integrated with other parts of the system in 2 ways:
   * hooks invoked on change (/etc/resolvconf/update.d/)
   * resolvconf tool (invoked with -a and -d or -u)

  Packages which install files into /etc/resolvconf/update.d are:
  - dnsmasq: This may be mostly covered by systemd-resolved itself (the dns
    caching path).
  - resolvconf: This probably isn't necessary in systemd-resolved path.
  - unbound: This is another "validating, recursive, caching DNS resolver".

  The list of Depends/Suggests/Recommends on resolvconf.

  # for pkg in $(apt-cache rdepends resolvconf | grep -v openreso | grep -v Reverse); do out=$(apt-cache show $pkg | grep resolvconf); src=$(apt-cache show $pkg | awk '$1 == "Source:" { print $2 }'); [ -n "$src" ] || src=$pkg; case "$out" in Depends:*resolvconf) r=depends;; Suggests:*) r=suggests;; Recommends:*) r=recommends;; esac; echo "$r $src"; done  | sort -u
  depends android-androresolvd
  recommends avahi
  recommends dhcpcd5
  recommends dibbler
  recommends ndisc6
  recommends whereami
  suggests bind9
  suggests dnscrypt-proxy
  suggests dnsmasq
  suggests dnssec-trigger
  suggests fetchmail
  suggests freedombox-setup
  suggests isc-dhcp
  suggests netscript-2.4
  suggests openvpn
  suggests postfix
  suggests pppconfig
  suggests pump
  suggests resolvconf
  suggests sendmail
  suggests squid3
  suggests vpnc
  suggests vpnc-scripts

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: systemd 234-2ubuntu9
  ProcVersionSignature: Ubuntu 4.12.0-11.12-generic 4.12.5
  Uname: Linux 4.12.0-11-generic x86_64
  ApportVersion: 2.20.6-0ubuntu7
  Architecture: amd64
  Date: Tue Aug 29 18:53:50 2017
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=C.UTF-8
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.12.0-11-generic root=UUID=f897b32a-eacf-4191-9717-844918947069 ro quiet splash vt.handoff=7
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.vendor: Intel Corporation

  Related bugs:
   * bug 1698181: Switch to netplan renderer in Artful
   * bug 1714308: dns does not work in initramfs after configure_networking
   * bug 1717983 replacement of isc-dhcp-client with with systemd-networkd for dhclient needs integration

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