upgrading systemd does restart networkd, but it should not remove any
existing managed configuration while restarting (or stopping). For
example:
ubuntu@lp1839231:~$ sudo systemctl start systemd-networkd
ubuntu@lp1839231:~$ ip a show ens3
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
group default qlen 1000
link/ether 52:54:00:e8:e2:3f brd ff:ff:ff:ff:ff:ff
inet 192.168.122.25/24 brd 192.168.122.255 scope global dynamic ens3
valid_lft 3537sec preferred_lft 3537sec
inet6 fe80::5054:ff:fee8:e23f/64 scope link
valid_lft forever preferred_lft forever
ubuntu@lp1839231:~$ sudo systemctl stop systemd-networkd
Warning: Stopping systemd-networkd.service, but it can still be activated by:
systemd-networkd.socket
ubuntu@lp1839231:~$ ip a show ens3
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
group default qlen 1000
link/ether 52:54:00:e8:e2:3f brd ff:ff:ff:ff:ff:ff
inet 192.168.122.25/24 brd 192.168.122.255 scope global dynamic ens3
valid_lft 3529sec preferred_lft 3529sec
inet6 fe80::5054:ff:fee8:e23f/64 scope link
valid_lft forever preferred_lft forever
ubuntu@lp1839231:~$ sudo systemctl start systemd-networkd
ubuntu@lp1839231:~$ ip a show ens3
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
group default qlen 1000
link/ether 52:54:00:e8:e2:3f brd ff:ff:ff:ff:ff:ff
inet 192.168.122.25/24 brd 192.168.122.255 scope global dynamic ens3
valid_lft 3599sec preferred_lft 3599sec
inet6 fe80::5054:ff:fee8:e23f/64 scope link
valid_lft forever preferred_lft forever
What specific config is in your networkd config files? What specific
interface(s) or address(es) are you having trouble with?
** Changed in: systemd (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1839231
Title:
updating bionic to 237-3ubuntu10.25 restarts systemd-networkd
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