DHCP plugin override the default route

[MaxThom]

Hi,

I have setup up a macvlan with dhcp with multuscni in our k8s clusters.
Pods receives the ip address from the dhcp and the container is starting normally. The problem is the dhcp add a second default route in the ip tables. This blocks all internet connection because the now default route is the wrong one.
How can I configure multus or the dhcp daemon to not add a second route ?

Multus config

{
    "cniVersion": "0.3.1",
    "type": "macvlan",
    "name": "sw-lan",
    "master": "eno1",
    "mode": "bridge",
    "ipam": {
        "type": "dhcp"
    }
}

DHCP Plugin daemon

[Unit]
Description=DHCP Client for CNI

[Socket]
ListenStream=/run/cni/dhcp.sock
SocketMode=0660
SocketUser=root
SocketGroup=root
RemoveOnStop=true

[Install]
WantedBy=sockets.target

[Unit]
Description=DHCP Client CNI Service
Requires=multus.dhcp.socket
After=network.target multus.dhcp.socket

[Service]
Type=simple
ExecStart=/var/lib/rancher/k3s/data/current/bin/dhcp daemon
TimeoutStopSec=30
KillMode=process

[Install]
WantedBy=multi-user.target
Also=multus.dhcp.socket

Annotation on the pods

annotations:
    k8s.v1.cni.cncf.io/networks: networking/sw-lan@sw0

[calh]

Hey @MaxThom, I have this same issue. Did you ever find a solution to remove the default route?

[n0rad]

    {
      "cniVersion": "0.3.0",
      "name": "mymacvlan",
      "plugins": [
        {
          "type": "macvlan",
          "master": "SOMETHING",
          "mode": "bridge",
          "ipam": {
            "type": "dhcp",
            "request": [
              {
                "skipDefault": true,
                "option": "subnet-mask"
              }
            ]
          }
        }
      ]
    }