DHCP CNI Plugin container

This repo is the source for the opensourcelan/dhcp-cni-plugin docker image.

How to use

Step 0: Important:

You need to enable ip_forwarding on all of your kube hosts first. This is not done by the container because if ip_forwarding is not set when docker starts, docker will set it and set a default iptables forward policy of drop, which breaks everything.

cat <<EOF >/etc/sysctl.d/05-forwarding.conf 
net.ipv4.ip_forward=1
EOF
sysctl --load=/etc/sysctl.d/05-forwarding.conf 

Step 1: Make sure the bridge interface br0 is configured on every host in your kube cluster. This needs to be bridged with your LAN that serves the DHCP you want.

Step 2: kubectl apply -f dhcp-daemonset.yaml

Done! The daemonset will deploy the CNI config and the requisite DHCP daemon.

How to build

Step 1: Build the dhcp binary.

GOPATH=~/go go get github.com/containernetworking/plugins/plugins/ipam/dhcp
cd ~/go/src/github.com/containernetworking/plugins/plugins/ipam/dhcp
GOPATH=~/go CGO_ENABLED=0 go build

Step 2: Put the dhcp binary in to this folder

cp ~/go/src/github.com/containernetworking/plugins/plugins/ipam/dhcp/dhcp .

Step 3: Build the image

./build.sh