blob: df0d975b3e940e5c4cb317124d42c681dbd986ec [file] [log] [blame]
#!/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 '.ips[0].address')
add_br_and_port $ip
echo '{"cniVersion":"0.3.1"}' | jq -c --arg ip $ip '.ips[0].address = $ip' >&3
;;
DEL)
set +o errexit
ipam
delete_br_and_port
set -o errexit
;;
*)
echo "CNI_COMMAND=[ADD|DEL] only supported"
exit 1
;;
esac