primo

prepara_nodo.sh

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+# 1. Aggiorna OS
+sudo apt update && sudo apt -y upgrade   # Ubuntu/Debian
+sudo apt install -y iputils-ping
+sudo apt install -y telnetd telnet
+sudo snap install -y kubectl --classic
+sudo apt install -y iptables
+sudo apt install -y iptables-persistent
+
+
+
+
+# 2. Disabilita SWAP (necessario)
+sudo swapoff -a
+sudo sed -i.bak '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
+
+# 3. Config kernel requisiti Kubernetes (es. bridge netfilter)
+cat <<EOF | sudo tee /etc/sysctl.d/99-k8s.conf
+net.bridge.bridge-nf-call-iptables  = 1
+net.ipv4.ip_forward                 = 1
+net.bridge.bridge-nf-call-ip6tables = 1
+fs.inotify.max_user_watches         = 524288
+EOF
+sudo sysctl --system
+
+# 4. Sincronizza orologio
+sudo apt install -y chrony
+sudo systemctl enable --now chrony
+
+#installa yq
+sudo wget -qO /usr/local/bin/yq https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64
+sudo chmod a+x /usr/local/bin/yq
+# 5. Imposta hostname (es.)
+#sudo hostnamectl set-hostname $1
+
+
+