I couldn't get NetworkManager to work in a container to bring up (virtual)
NICs with static ip. My hypothesis is that NM can't apply an Ethernet
connection to a macvlan device, and wonder if there are workarounds that I
may try.
The setup is as follows:
- The host is Ubuntu 18.04. A macvlan nic is provided to containers with
the following profile
devices:
eth0:
name: eth0
nictype: macvlan
parent: eno1
type: nic
- The LXD container runs CentOS 7 with NM 1.18.0.
- The "old-style" network scripts work, with the following configuration
file:
# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
TYPE=Ethernet
BOOTPROTO=none
IPV4_FAILURE_FATAL="no"
IPADDR=10.1.16.92
PREFIX=16
GATEWAY=10.1.0.1
- But NM won't work.
# nmcli device
DEVICE TYPE STATE CONNECTION
lo loopback unmanaged --
eth0 macvlan unmanaged --
# nmcli connection
NAME UUID TYPE DEVICE
System eth0 5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03 ethernet --
# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode
DEFAULT qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
23: eth0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP mode DEFAULT qlen 1000
link/ether 00:16:3e:10:b3:80 brd ff:ff:ff:ff:ff:ff link-netnsid 0
# nmcli connection up 5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
Error: Connection activation failed: No suitable device found for this
connection (device lo not available because device is strictly unmanaged).
I tried "nmcli dev set eth0 managed yes" but still couldn't bring the
connection up.
The error message probably claims that eth0 is not a suitable device (due
to its type is macvlan). I found a post back from 2010
https://mail.gnome.org/archives/networkmanager-list/2010-March/msg00308.html
asking if NM can be forced to trade a macvlan as an Ethernet device, which
might be related?
Anyway, since the "old-style" network scrips are already removed from
CentOS 8, I really wonder if NM can be used in a container with macvlan
devices. Any suggestions?
Thank you!
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