| #!/bin/bash -x |
| # |
| # Copyright 2019-present Open Networking Foundation |
| # |
| # SPDX-License-Identifier: LicenseRef-ONF-Member-Only-1.0 |
| |
| 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 |