| #!/bin/bash -x |
| # |
| # Copyright 2019-present Open Networking Foundation |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| set -o errexit |
| set -o pipefail |
| set -o nounset |
| |
| exec 3>&1 |
| exec &>>/var/log/simple-ovs-cni.log |
| |
| PATH="$CNI_PATH:$(dirname "${BASH_SOURCE[0]}"):$PATH" |
| CNI_CONF=$(cat /dev/stdin) |
| |
| get_bridge() { |
| echo "br-$(echo $CNI_CONF | jq -r '.name')" |
| } |
| |
| ipam() { |
| local plugin=$(echo $CNI_CONF | jq -r '.ipam.type') |
| local res=$(echo $"$CNI_CONF" | "$plugin" | jq -c '.') |
| echo $res |
| } |
| |
| add_br_and_port() { |
| mkdir -p /var/run/netns/ |
| ln -sfT $CNI_NETNS /var/run/netns/$CNI_CONTAINERID |
| |
| local bridge=$(get_bridge) |
| local ip=$1 |
| |
| ovs-vsctl --may-exist add-br $bridge |
| ovs-vsctl add-port $bridge $CNI_IFNAME -- set Interface $CNI_IFNAME type=internal |
| |
| ip link set $CNI_IFNAME netns $CNI_CONTAINERID |
| ip netns exec $CNI_CONTAINERID ip addr add $ip dev $CNI_IFNAME |
| ip netns exec $CNI_CONTAINERID ip link set $CNI_IFNAME up |
| } |
| |
| delete_br_and_port() { |
| local bridge="br-$(echo $CNI_CONF | jq -r '.name')" |
| ovs-vsctl del-port $CNI_IFNAME |
| if [ -z "$(ovs-vsctl list-ports $bridge)" ]; then |
| ovs-vsctl del-br $bridge |
| fi |
| } |
| |
| case $CNI_COMMAND in |
| ADD) |
| res=$(ipam) |
| ip=$(echo $res | jq -r '.ip4.ip') |
| add_br_and_port $ip |
| echo '{"cniVersion":"0.2.0"}' | jq -c --arg ip $ip '.ip4.ip = $ip' >&3 |
| ;; |
| DEL) |
| set +o errexit |
| ipam |
| delete_br_and_port |
| set -o errexit |
| ;; |
| *) |
| echo "CNI_COMMAND=[ADD|DEL] only supported" |
| exit 1 |
| ;; |
| esac |