Bug#875303: Troublesome systemd-networkd-wait-online.service

[Yuri D'Elia]

Package: systemd
Version: 234-3
Severity: normal

The systemd-networkd-wait-online.service is causing tlp.service (among
others) to break in my setup.

The issue is caused by the rule

Also=systemd-networkd-wait-online.service

present in systemd-network.service. Several services include include an
explicit dependency on network-online.target which then drag in
systemd-networkd-wait-online.service. One is apt-daily.service, but
exim4 (via LFS) is another.

The net result is that multi-user.target now depends on
systemd-networkd-wait-online.service. However, on a laptop, this is
broken. multi-user.target shouldn't directly depend on a working
connection.

In case of tlp.service, which has After=multi-user.target, will execute
the startup rules *after* wait-online timeouts, which is some minutes
after I could login.

Incidentally, exim4 also isn't started until timeout occurs, which makes
local mail delivery broken until then.

This is more subtle. The init script in this case depends on $network.
systemd shouldn't automatically translate this to include
network-online.target, but only network.target.

I currently masked network-online.service to resolve this issue, but
this shouldn't be. Services should be able to depend on network-online
without affecting system startup.

-- Package-specific info:

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (900, 'unstable'), (800, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.12.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages systemd depends on:
ii  adduser         3.116
ii  libacl1         2.2.52-3+b1
ii  libapparmor1    2.11.0-10
ii  libaudit1       1:2.7.7-1+b2
ii  libblkid1       2.29.2-4
ii  libc6           2.24-17
ii  libcap2         1:2.25-1
ii  libcryptsetup4  2:1.7.3-4
ii  libgcrypt20     1.8.1-1
ii  libgpg-error0   1.27-3
ii  libidn11        1.33-1
ii  libip4tc0       1.6.1-2
ii  libkmod2        24-1
ii  liblz4-1        0.0~r131-2+b1
ii  liblzma5        5.2.2-1.3
ii  libmount1       2.29.2-4
ii  libpam0g        1.1.8-3.6
ii  libseccomp2     2.3.1-2.1
ii  libselinux1     2.7-1
ii  libsystemd0     234-3
ii  mount           2.29.2-4
ii  procps          2:3.3.12-3
ii  util-linux      2.29.2-4

Versions of packages systemd recommends:
ii  dbus            1.11.16+really1.11.16-2
ii  libpam-systemd  234-3

Versions of packages systemd suggests:
ii  policykit-1        0.105-18
pn  systemd-container  <none>

Versions of packages systemd is related to:
pn  dracut           <none>
ii  initramfs-tools  0.130
ii  udev             234-3

-- Configuration Files:
/etc/systemd/journald.conf changed [not included]
/etc/systemd/logind.conf changed [not included]
/etc/systemd/resolved.conf changed [not included]
/etc/systemd/timesyncd.conf changed [not included]