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#!/bin/bash
# Number of nodes to create
NUM_NODES=3
BASE_IMAGE="ubuntu-18.04-minimal-cloudimg-amd64.img"
NETWORK="default"
MEMORY=2048
VCPUS=2
# Generate cloud-init ISO for each node
for i in $(seq 1 $NUM_NODES); do
VM_NAME="k3s-node-$i"
CLOUD_INIT_DIR="cloud-init-$VM_NAME"
mkdir -p $CLOUD_INIT_DIR
cat <<EOF > $CLOUD_INIT_DIR/meta-data
instance-id: $VM_NAME
local-hostname: $VM_NAME
EOF
cp user-data $CLOUD_INIT_DIR/
# Create cloud-init ISO
genisoimage -output $CLOUD_INIT_DIR/cloud-init.iso -volid cidata -joliet -rock $CLOUD_INIT_DIR/user-data $CLOUD_INIT_DIR/meta-data
# Create VM
virt-install \
--name $VM_NAME \
--memory $MEMORY \
--vcpus $VCPUS \
--disk size=10,backing_store=$BASE_IMAGE \
--disk path=$CLOUD_INIT_DIR/cloud-init.iso,device=cdrom \
--os-type linux \
--os-variant ubuntu18.04 \
--network network=$NETWORK \
--graphics none \
--console pty,target_type=serial \
--import \
--noautoconsole
echo "Created VM $VM_NAME"
done
# Wait for VMs to boot up and install K3s
sleep 60
# Get the IP address of the master node
MASTER_IP=$(virsh domifaddr k3s-node-1 | grep -oP '(\d+\.\d+\.\d+\.\d+)' | head -1)
# Set up the master node
ssh ubuntu@$MASTER_IP "curl -sfL https://get.k3s.io | sh -"
# Get the K3s token from the master node
K3S_TOKEN=$(ssh ubuntu@$MASTER_IP "sudo cat /var/lib/rancher/k3s/server/node-token")
# Set up the worker nodes
for i in $(seq 2 $NUM_NODES); do
NODE_IP=$(virsh domifaddr k3s-node-$i | grep -oP '(\d+\.\d+\.\d+\.\d+)' | head -1)
ssh ubuntu@$NODE_IP "curl -sfL https://get.k3s.io | K3S_URL=https://$MASTER_IP:6443 K3S_TOKEN=$K3S_TOKEN sh -"
echo "Joined k3s-node-$i to the cluster"
done
echo "K3s cluster setup completed. Master node IP: $MASTER_IP"
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