kind-metallb.sh

#!/bin/bash

# Create the cluster
kind create cluster --name lb
# Get the configuration
kind get kubeconfig --name lb > /tmp/lb-kubeconfig
# Deploy metallb
KUBECONFIG=/tmp/lb-kubeconfig kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.9.5/manifests/namespace.yaml
KUBECONFIG=/tmp/lb-kubeconfig kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.9.5/manifests/metallb.yaml
KUBECONFIG=/tmp/lb-kubeconfig kubectl create secret generic -n metallb-system memberlist --from-literal=secretkey="$(openssl rand -base64 128)"
# Gather information about local networking
network=$(docker inspect lb-control-plane | jq -r .[0].HostConfig.NetworkMode)
echo "## Docker network: $network"
subnet=$(docker network inspect $network | jq -r .[0].IPAM.Config[0].Subnet)
echo "## Subnet: $subnet"
gw=$(docker network inspect $network | jq -r .[0].IPAM.Config[0].Gateway)
echo "## Gateway: $gw"
read A B C D <<<"${gw//./ }"
# Apply the configuration based on the gathered information
cat << EOF > /tmp/metallb-config.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  namespace: metallb-system
  name: config
data:
  config: |
    address-pools:
    - name: default
      protocol: layer2
      addresses:
      - $A.$B.255.1-$A.$B.255.200
EOF
KUBECONFIG=/tmp/lb-kubeconfig kubectl apply -f /tmp/metallb-config.yaml
# Ready!