[Bug 1772137] [NEW] networkd-dispatcher starts too late to take effect on boot

[Steve Langasek]

Public bug reported:

networkd-dispatcher's systemd unit has default dependencies, which means
it starts much, much too late to have any effect for interfaces brought
up by networkd at boot (since the events are missed, and not replayed).

We should instead have systemd unit dependencies like this (replicating
systemd-networkd's own):

[Unit]
Description=Dispatcher daemon for systemd-networkd
DefaultDependencies=no
After=systemd-udevd.service network-pre.target systemd-sysusers.service systemd-sysctl.service
Before=systemd-networkd.service

In local testing, this DTRT.

** Affects: networkd-dispatcher (Ubuntu)
     Importance: High
     Assignee: Julian Andres Klode (juliank)
         Status: New

** Affects: networkd-dispatcher (Ubuntu Bionic)
     Importance: Undecided
         Status: New

** Changed in: networkd-dispatcher (Ubuntu)
     Assignee: (unassigned) => Julian Andres Klode (juliank)

** Changed in: networkd-dispatcher (Ubuntu)
   Importance: Undecided => High

** Also affects: networkd-dispatcher (Ubuntu Bionic)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1772137

Title:
  networkd-dispatcher starts too late to take effect on boot

Status in networkd-dispatcher package in Ubuntu:
  New
Status in networkd-dispatcher source package in Bionic:
  New

Bug description:
  networkd-dispatcher's systemd unit has default dependencies, which
  means it starts much, much too late to have any effect for interfaces
  brought up by networkd at boot (since the events are missed, and not
  replayed).

  We should instead have systemd unit dependencies like this
  (replicating systemd-networkd's own):

  [Unit]
  Description=Dispatcher daemon for systemd-networkd
  DefaultDependencies=no
  After=systemd-udevd.service network-pre.target systemd-sysusers.service systemd-sysctl.service
  Before=systemd-networkd.service

  In local testing, this DTRT.

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