sysctl -w kernel.unprivileged_userns_clone=1
mkdir /etc/frr

# In case you don't want to follow the <<apt install steps>> install these manually:
# unshare - run program with some namespaces unshared from parent
# nsenter - run program with namespaces of other processes
# tini - https://github.com/krallin/tini
# dumpcap - Dump network traffic
# ip - show / manipulate routing, network devices, interfaces and tunnels

apt-get satisfy \
    'graphviz' 'tshark (>=4.0)' 'wireshark-common (>=4.0)' 'tini' \
    'python3 (>=3.8)' \
    'python3-pytest (>=6.1)' 'python3-pytest-xdist' \
    'python3-typing-extensions' 'python3-docutils' 'python3-pyinotify' \
    'python3-scapy (>=2.4.5)' 'python3-exabgp (>=4.2)' \
    'python3-jinja2 (>=3.1)' 'python3-lxml' 'python3-markupsafe' \
    

# content of test_sample.py

#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2018-2023  YOUR NAME HERE for NetDEF, Inc.
"""
Simple demo test for topotato.
"""

from topotato.v1 import *

@topology_fixture()
def topology(topo):
    """
    [ r1 ]---[ noprot ]
    [    ]
    [    ]---[ rip ]
    [    ]
    [    ]---[ ripng ]
    [    ]
    [    ]---[ ospfv2 ]
    [    ]
    [    ]---[ ospfv3 ]
    [    ]
    [    ]---[ isisv4 ]
    [    ]
    [    ]---[ isisv6 ]
    """
    topo.router("r1").iface_to("ripng").ip6.append("fc00:0:0:1::1/64")


class Configs(FRRConfigs):
    routers = ["r1"]

    zebra = """
    #% extends "boilerplate.conf"
    #% block main
    #%   for iface in router.ifaces
    interface {{ iface.ifname }}
     description {{ iface.other.endpoint.name }}
     no link-detect
    !
    #%   endfor
    !
    ip forwarding
    ipv6 forwarding
    !
    #% endblock
    """

    ripd = """
    #% extends "boilerplate.conf"
    #% block main
    debug rip events
    debug rip zebra
    !
    router rip
     version 2
     network {{ router.iface_to('rip').ip4[0].network }}
    #% endblock
    """

    ripngd = """
    #% extends "boilerplate.conf"
    #% block main
    debug ripng events
    debug ripng zebra
    !
    router ripng
     network {{ router.iface_to('ripng').ip6[0].network }}
    #% endblock
    """


class AllStartupTest(TestBase, AutoFixture, topo=topology, configs=Configs):
    """
    docstring here
    """

    @topotatofunc
    def test_running(self, topo, r1):
        """
        just check that all daemons are running
        """
        for daemon in Configs.daemons:
            if not hasattr(Configs, daemon):
                continue
            yield from AssertVtysh.make(r1, daemon, command="show version")

./run_userns.sh --frr-builddir=$PATH_TO_FRR_BUILD \
                --log-cli-level=DEBUG \
                -v -v -x \ 
                sameple_test.py