ansible-edda/playbooks/roles/services/setup/user/templates/veth/interface

iface {{ services_service_iface_name }} inet6 manual
    pre-up mkdir -p /run/netns
    pre-up ln -sfTv /proc/$(cat {{ services_service_user_containers }}/pidfile)/ns/net /run/netns/{{ services_service_user_name }}

    pre-up ip link add name $IFACE type veth peer name veth0 netns {{ services_service_user_name }}
    pre-up ip link set $IFACE master br0

    pre-up ip -n {{ services_service_user_name }} link set veth0 up

    pre-up ip -n {{ services_service_user_name }} address add {{ services_service_iface_inet_address }}/24 dev veth0
    pre-up ip -n {{ services_service_user_name }} route add default via {{ services_bridge_inet_gateway }} dev veth0

    pre-up ip -6 -n {{ services_service_user_name }} address add {{ services_service_iface_inet6_address }}/64 dev veth0 nodad
    pre-up ip -6 -n {{ services_service_user_name }} route add default via {{ services_bridge_inet6_gateway }} dev veth0

    post-down rm {{ services_service_user_containers }}/veth0

    post-down ip -6 -n {{ services_service_user_name }} route del default via {{ services_bridge_inet6_gateway }} dev veth0
    post-down ip -6 -n {{ services_service_user_name }} address del {{ services_service_iface_inet6_address }}/64 dev veth0

    post-down ip -n {{ services_service_user_name }} route del default via {{ services_bridge_inet_gateway }} dev veth0
    post-down ip -n {{ services_service_user_name }} address del {{ services_service_iface_inet_address }}/24 dev veth0

    post-down ip -n {{ services_service_user_name }} link set veth0 down

    post-down ip link set $IFACE nomaster
    post-down ip link del dev $IFACE

    post-down rm /run/netns/{{ services_service_user_name }}