? -> /etc/network/interfaces is missing on Debian image

LXD
1

Since this morning,
I no longer have the /etc/network/interfaces path, has there been a Debian 11 image update ?

I tried on a brand new VPS, I am having issues everywhere, on all of my machines.

I only possess

  • /etc/netconfig
  • /etc/networks

Systemd network not found as well

root@test:~# systemctl status networking
Unit networking.service could not be found.

+-------+--------------+--------+----------------------------------------+--------------+-----------+---------+-------------------------------+
| ALIAS | FINGERPRINT  | PUBLIC |              DESCRIPTION               | ARCHITECTURE |   TYPE    |  SIZE   |          UPLOAD DATE          |
+-------+--------------+--------+----------------------------------------+--------------+-----------+---------+-------------------------------+
|       | 249e361d4c54 | no     | Debian bullseye amd64 (20230130_05:25) | x86_64       | CONTAINER | 83.56MB | Jan 30, 2023 at 11:07am (UTC) |
+-------+--------------+--------+----------------------------------------+--------------+-----------+---------+-------------------------------+

ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
4: eth0@if5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:16:3e:b9:92:dd brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 10.138.183.235/24 brd 10.138.183.255 scope global dynamic eth0
       valid_lft 2572sec preferred_lft 2572sec
    inet6 fd42:4b26:17c7:cbc8:216:3eff:feb9:92dd/64 scope global dynamic mngtmpaddr noprefixroute
       valid_lft 3157sec preferred_lft 3157sec
    inet6 fe80::216:3eff:feb9:92dd/64 scope link
       valid_lft forever preferred_lft forever
2

Yes, they use systemd-networkd for network setup now, and those configs are in /etc/systemd/network.

lxc launch images:debian/11 c1
lxc ls c1
+------+---------+--------------------+-----------------------------------------------+-----------+-----------+
| NAME |  STATE  |        IPV4        |                     IPV6                      |   TYPE    | SNAPSHOTS |
+------+---------+--------------------+-----------------------------------------------+-----------+-----------+
| c1   | RUNNING | 10.21.203.8 (eth0) | fd42:ffdb:caff:baf7:216:3eff:fe65:1c25 (eth0) | CONTAINER | 0         |
+------+---------+--------------------+-----------------------------------------------+-----------+-----------+

lxc exec c1 -- cat /etc/systemd/network/eth0.network
[Match]
Name=eth0
[Network]
DHCP=true
[DHCPv4]
UseDomains=true

lxc exec c1 -- networkctl status
●          State: routable                                          
         Address: 10.21.203.8 on eth0
                  fd42:ffdb:caff:baf7:216:3eff:fe65:1c25 on eth0
                  fe80::216:3eff:fe65:1c25 on eth0
         Gateway: 10.21.203.1 (Xensource, Inc.) on eth0
                  fe80::216:3eff:fe8b:c67e (Xensource, Inc.) on eth0
             DNS: 10.21.203.1
  Search Domains: lxd

Jan 30 11:24:32 c1 systemd[1]: Starting Network Service...
Jan 30 11:24:32 c1 systemd-networkd[53]: Failed to increase receive buffer size for general netlink socket, ignoring: Operation not permitted
Jan 30 11:24:32 c1 systemd-networkd[53]: Failed to increase buffer size for device monitor, ignoring: Operation not permitted
Jan 30 11:24:32 c1 systemd-networkd[53]: Enumeration completed
Jan 30 11:24:32 c1 systemd[1]: Started Network Service.
Jan 30 11:24:32 c1 systemd-networkd[53]: eth0: DHCPv4 address 10.21.203.8/24 via 10.21.203.1
Jan 30 11:24:34 c1 systemd-networkd[53]: eth0: Gained IPv6LL

This was added back in April 2022

3

Thank you Thomas, indeed the last date my last installation of a Debian 11 image dates back to before April 2022.

Thank you for your response :white_check_mark:

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