sample.config

root@galvatron:~# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback


# Default Networking:
auto em1
iface em1 inet static
    address 192.168.70.20
    netmask 255.255.255.0
    network 192.168.70.0
    broadcast 192.168.70.255
    gateway 192.168.70.1
    dns-nameservers 192.168.1.70
    dns-search jinkit.com
#
#auto em2
#iface em2 inet manual
#        up ifconfig em2 up


# When you want to flip internal/external networking:
#auto em1
#iface em1 inet manual
#        up ifconfig em1 up
#
#auto em2
#iface em2 inet static
#        address 192.168.4.20
#        netmask 255.255.252.0
#        network 192.168.4.0
#        broadcast 192.168.7.255
#        gateway 192.168.4.1
#        dns-nameservers 192.168.1.70
#        dns-search jinkit.com


# Bridge for vlan network
# -----------------------
# Used by all compute and network nodes
# The IP address on this device is optional
auto br-kolla
iface br-kolla inet static
    pre-up ip link add br-kolla-veth type veth peer name eth12 || true  # Create veth pair
    pre-up ip link set br-kolla-veth up  # Set the veth UP
    pre-up ip link set eth12 up  # Set the veth UP
    post-down ip link del br-kolla-veth || true  # Delete veth pair on DOWN
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    bridge_ports em2 br-kolla-veth  # Notice this bridge port is an Untagged host interface
    offload-sg off
    address 192.168.4.20
    netmask 255.255.252.0
    gateway 192.168.4.1
    dns-nameservers 8.8.8.8 8.8.4.4

# Tagged vlan network interfaces
# ------------------------------
# Used in various bridges
auto br-kolla.101
iface br-kolla.101 inet manual
    vlan-raw-device br-kolla
    vlan_id 101

auto br-kolla.102
iface br-kolla.102 inet manual
    vlan-raw-device br-kolla
    vlan_id 102

auto br-kolla.103
iface br-kolla.103 inet manual
    vlan-raw-device br-kolla
    vlan_id 103


# Bridge for vxlan network
# ------------------------
# Used by all compute and network nodes
auto br-vxlan
iface br-vxlan inet manual
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    bridge_ports br-kolla.101  # Notice the bridge port is the vlan tagged interface
    offload-sg off
    address 172.29.240.20
    netmask 255.255.252.0
    dns-nameservers 8.8.8.8 8.8.4.4


# Bridge for management network
# -----------------------------
# Used by all nodes
auto br-mgmt
iface br-mgmt inet static
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    bridge_ports br-kolla.102  # Notice the bridge port is the vlan tagged interface
    offload-sg off
    address 172.29.236.20
    netmask 255.255.252.0
    gateway 172.29.236.1
    dns-nameservers 8.8.8.8 8.8.4.4


# Bridge for storage network
# --------------------------
# Used by all compute and storage nodes
auto br-storage
iface br-storage inet static
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    bridge_ports br-kolla.103  # Notice the bridge port is the vlan tagged interface
    offload-sg off
    address 172.29.244.20
    netmask 255.255.252.0
    gateway 172.29.244.1
    dns-nameservers 8.8.8.8 8.8.4.4


# Source other interface files that may be found
# ----------------------------------------------
source /etc/network/interfaces.d/*.cfg