k8s_worker_user_data.sh

#!/bin/bash
set -e

KUBERNETES_VERSION="${kubernetes_version}"
KUBERNETES_INSTALL_VERSION="${kubernetes_install_version}"
CONTAINERD_VERSION="${containerd_version}"

apt-get update
apt-get install -y apt-transport-https ca-certificates curl gnupg lsb-release jq awscli

curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null

curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.31/deb/Release.key | gpg --dearmor -o /usr/share/keyrings/kubernetes-archive-keyring.gpg
echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.31/deb/ /" | tee /etc/apt/sources.list.d/kubernetes.list

apt-get update
apt-get install -y containerd.io=$CONTAINERD_VERSION*

mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml
sed -i 's/SystemdCgroup = false/SystemdCgroup = true/' /etc/containerd/config.toml

systemctl restart containerd
systemctl enable containerd

apt-get update
apt-get install -y kubelet=$KUBERNETES_INSTALL_VERSION kubeadm=$KUBERNETES_INSTALL_VERSION kubectl=$KUBERNETES_INSTALL_VERSION
apt-mark hold kubelet kubeadm kubectl

cat > /etc/sysctl.d/99-kubernetes-cri.conf <<EOF
net.bridge.bridge-nf-call-iptables  = 1
net.ipv4.ip_forward                 = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
sysctl --system

modprobe overlay
modprobe br_netfilter

cat > /etc/modules-load.d/k8s.conf <<EOF
overlay
br_netfilter
EOF

swapoff -a
sed -i '/swap/d' /etc/fstab

REGION=$(curl -s http://169.254.169.254/latest/meta-data/placement/region)
aws configure set region $REGION

LOCAL_IP=$(curl -s http://169.254.169.254/latest/meta-data/local-ipv4)
hostname=$(hostname)
echo "$LOCAL_IP $hostname" >> /etc/hosts
    
while ! aws s3 ls "s3://${s3_bucket_name}/worker_join.sh" 2>/dev/null; do
    echo "Waiting for cluster initialization to complete..."
    sleep 10
done

aws s3 cp s3://${s3_bucket_name}/worker_join.sh /root/worker_join.sh
chmod +x /root/worker_join.sh

bash /root/worker_join.sh