Failed to configure nodes on a non root user

[cwyark]

I'm using ramonfontes/containernet's version containernet. I found it could not configure nodes when the docker image is running under a non-root user permission.

here's my dockerfile

FROM ubuntu:focal
RUN useradd -u 1000 ubuntu
RUN apt update;apt install -y sudo iproute2 net-tools wireless-tools
USER ubuntu

it always show permission during configuring nodes (I thinks these commands is running under 'ubuntu' user)

*** Configuring WiFi nodes
Loading 3 virtual wifi interfaces
Created mac80211_hwsim device with ID 0
Created mac80211_hwsim device with ID 1
Created mac80211_hwsim device with ID 2
rfkill unblock 117
*** sta1 : ('ip link set wlan0 down',)
RTNETLINK answers: Operation not permitted
*** sta1 : ('ip link set wlan0 name sta1-wlan0',)
RTNETLINK answers: Operation not permitted
rfkill unblock 118
*** sta2 : ('ip link set wlan1 down',)
RTNETLINK answers: Operation not permitted
*** sta2 : ('ip link set wlan1 name sta2-wlan0',)
RTNETLINK answers: Operation not permitted
*** ap1 : ('ip link set wlan2 down',)
*** ap1 : ('ip link set wlan2 name ap1-wlan1',)
*** ap1 : ('ip link set ap1-wlan1 up',)

added intf sta1-wlan0 (0) to node sta1
*** sta1 : ('ip link set', 'sta1-wlan0', 'down')
Cannot find device "sta1-wlan0"
*** sta1 : ('ip link set', 'sta1-wlan0', 'address', '00:02:00:00:00:01')
Cannot find device "sta1-wlan0"
*** sta1 : ('ip link set', 'sta1-wlan0', 'up')
Cannot find device "sta1-wlan0"
*** sta1 : ('ip addr flush ', 'sta1-wlan0')
Device "sta1-wlan0" does not exist.
*** sta1 : ('ip addr add 10.0.0.1/8 brd + dev sta1-wlan0 && ip -6 addr add 2001:0:0:0:0:0:0:1/64 dev sta1-wlan0',)
Cannot find device "sta1-wlan0"
*** sta1 : ('ip -6 addr flush ', 'sta1-wlan0')
Device "sta1-wlan0" does not exist.
*** sta1 : ('ip -6 addr add', '2001:0:0:0:0:0:0:1/64', 'dev', 'sta1-wlan0')
Cannot find device "sta1-wlan0"
*** sta1 : ('ip link set lo up',)
RTNETLINK answers: Operation not permitted

I've check my running container has NET_ADMIN capability

            "CapAdd": [
                "net_admin",
                "net_raw",
                "sys_admin"
            ],