bridge doesn't work with DHCP
jimparis opened this issue · 1 comments
jimparis commented
With podman version 4.7.2, netavark version 1.8.0:
macvlan
driver works with DHCP:
# podman network create --disable-dns --driver macvlan --interface-name brint --ipam-driver dhcp lan
lan
# podman run -it --rm --network=lan alpine ip addr show eth0
2: eth0@if8: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP qlen 1000
link/ether 4e:81:42:14:17:be brd ff:ff:ff:ff:ff:ff
inet 10.0.103.174/16 brd 10.0.255.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::4c81:42ff:fe14:17be/64 scope link tentative
valid_lft forever preferred_lft forever
(note assigned 10.0.103.174 address there)
But bridge
does not:
# podman network rm lan
# podman network create --disable-dns --driver bridge --interface-name brint --ipam-driver dhcp lan
lan
# podman run -it --rm --network=lan alpine ip addr show eth0
2: eth0@if28: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP qlen 1000
link/ether c6:9b:3d:ec:27:6c brd ff:ff:ff:ff:ff:ff
inet6 fe80::c49b:3dff:feec:276c/64 scope link tentative
valid_lft forever preferred_lft forever
Is this configuration supportable?
(For my setup, I need bridge
instead of macvlan
so that the host can communicate with the container too. I can work around it with --cap-add NET_ADMIN,NET_RAW
and running udhcpc
inside the container, but would prefer to avoid that if possible.)
jimparis commented
Actually this seems straightforward to support: #869
# podman network rm lan
lan
# podman network create --disable-dns --driver bridge --interface-name brint --ipam-driver dhcp lan
lan
# podman run -it --rm --network=lan alpine ip addr show eth0
2: eth0@if34: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP qlen 1000
link/ether d6:7e:53:56:2b:27 brd ff:ff:ff:ff:ff:ff
inet 10.0.103.178/16 brd 10.0.255.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::d47e:53ff:fe56:2b27/64 scope link tentative
valid_lft forever preferred_lft forever