OVN - OVN Docker插件

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2023-12-01

# start docker
docker daemon --cluster-store=consul://127.0.0.1:8500 
    --cluster-advertise=$HOST_IP:0
# start north
/usr/share/openvswitch/scripts/ovn-ctl start_northd
ovn-nbctl set-connection ptcp:6641
ovn-sbctl set-connection ptcp:6642
# start south
ovs-vsctl set Open_vSwitch . 
    external_ids:ovn-remote="tcp:$CENTRAL_IP:6642" 
    external_ids:ovn-nb="tcp:$CENTRAL_IP:6641" 
    external_ids:ovn-encap-ip=$LOCAL_IP 
    external_ids:ovn-encap-type="$ENCAP_TYPE"
/usr/share/openvswitch/scripts/ovn-ctl start_controller
# start openvswitch plugin
pip install Flask
PYTHONPATH=$OVS_PYTHON_LIBS_PATH ovn-docker-overlay-driver --detach
# create docker network
docker network create -d openvswitch --subnet=192.168.1.0/24 foo

Workflow

Initialize ovn bridge

ovs-vsctl --timeout=5 -vconsole:off -- --may-exist add-br br-int 
          -- set bridge br-int external_ids:bridge-id=br-int 
             other-config:disable-in-band=true fail-mode=secure
ovs-vsctl --timeout=5 -vconsole:off -- get Open_vSwitch . external_ids:ovn-nb
ovs-vsctl --timeout=5 -vconsole:off -- set open_vswitch . external_ids:ovn-bridge=br-int

Create network

nid="red-net"
ovn-nbctl ls-add $nid -- set Logical_Switch $nid external_ids:subnet=10.160.0.0/24 external_ids:gateway_ip=10.160.0.1
ovn-nbctl show

Create container

nid="red-net"
eid="blue-container"
ip="10.160.0.2"
mac="02:38:e1:a2:28:38"
ovn-nbctl lsp-add $nid $eid
ovn-nbctl lsp-set-addresses $eid "$mac $ip"
ip netns add $eid
ip link add veth_inside type veth peer name veth_outside
ip link set dev veth_inside address $mac
ip link set veth_inside netns $eid
ip link set veth_outside up
ip netns exec $eid ip addr add 10.160.0.2/24 dev veth_inside
ip netns exec $eid ip route add default via 10.160.0.1
ovs-vsctl --timeout=5 -vconsole:off 
          -- add-port br-int veth_outside 
          -- set interface veth_outside 
             external_ids:attached-mac=$mac 
             external_ids:iface-id=$eid 
             external_ids:vm-id=$eid 
             external_ids:iface-status=active

Get endpoint status

ovn-nbctl --if-exists get Logical_Switch_Port $eid addresses

Delete container

ip netns del $eid
ip link delete veth_outside
ovs-vsctl --if-exists del-port veth_outside
ovn-nbctl lsp-del $eid

Delete network

ovn-nbctl ls-del red-net

参考文档

http://docs.openvswitch.org/en/latest/howto/docker/
http://dockone.io/article/1200