Setup K3s cluster via k3sup within one minute

cleanupk3s.sh

#!/bin/bash

# Read the list of IP addresses from the environment variable
IP_ADDRESSES=($HOSTS)

# Check if there is at least one IP address
if [ ${#IP_ADDRESSES[@]} -eq 0 ]; then
    echo "No IP addresses found. Please ensure the HOSTS environment variable is correctly set."
    exit 1
fi

# Clean up the master node
MASTER_IP=${IP_ADDRESSES[0]}
echo "Cleaning up master node: $MASTER_IP"
ssh -i ~/.ssh/id_rsa $MASTER_IP k3s-uninstall.sh

# Clean up the other agent nodes
for i in "${!IP_ADDRESSES[@]}"; do
    if [ $i -ne 0 ]; then
        AGENT_IP=${IP_ADDRESSES[$i]}
        echo "Cleaning up agent node: $AGENT_IP"
        ssh -i ~/.ssh/id_rsa $AGENT_IP k3s-agent-uninstall.sh
    fi
done

echo "k3s cluster cleanup complete."

setupk3s.sh

#!/bin/bash

# Read the list of IP addresses from the environment variable
IP_ADDRESSES=($HOSTS)
SSH_PORT=22
SSH_KEY=~/.ssh/id_rsa
# Define the k3s version
K3S_VERSION="v1.25.16+k3s4"

for arg in "$@"; do
    case $arg in
        --docker)
            EXTRA_ARGS="$EXTRA_ARGS --docker"
            shift
            ;;
        --mini)
            EXTRA_ARGS="$EXTRA_ARGS --disable traefik --disable metrics-server --disable local-storage --disable servicelb"
            shift
            ;;
        --no-traefix)
            EXTRA_ARGS="$EXTRA_ARGS --disable traefik"
            shift
            ;;
        --user)
            USER="$2"
            shift 2
            ;;
        --key)
            SSH_KEY="$2"
            shift 2
            ;;
        --k3s-version)
            K3S_VERSION="$2"
            shift 2
            ;;
    esac
done

# Check if there is at least one IP address
if [ ${#IP_ADDRESSES[@]} -eq 0 ]; then
    echo "No IP addresses found. Please ensure the HOSTS environment variable is correctly set."
    exit 1
fi

# Install the master node
MASTER_IP=${IP_ADDRESSES[0]}
echo "Installing master node: $MASTER_IP"

k3sup install --ip $MASTER_IP --ssh-port $SSH_PORT --ssh-key $SSH_KEY --user $USER --k3s-version $K3S_VERSION \
    --k3s-extra-args "--write-kubeconfig-mode 644 --write-kubeconfig ~/.kube/config $EXTRA_ARGS" \
    --local-path ~/.kube/config

# Install the other agent nodes
for i in "${!IP_ADDRESSES[@]}"; do
    if [ $i -ne 0 ]; then
        AGENT_IP=${IP_ADDRESSES[$i]}
        echo "Installing agent node: $AGENT_IP"
        k3sup join --ip $AGENT_IP --ssh-port $SSH_PORT --server-ip $MASTER_IP --ssh-key $SSH_KEY --user $USER \
        --k3s-channel $K3S_VERSION \
        --k3s-extra-args "$EXTRA_ARGS"
    fi
done

echo "k3s cluster installation complete."