disabling swap in raspberrypi

bootstrap/cluster/main.tf

@@ -29,9 +29,39 @@ resource "null_resource" "kubeadm_control_plane" {
 set -euo pipefail
 
 sudo apt-get update
-sudo apt-get install -y open-iscsi nfs-common
+sudo apt-get install -y curl open-iscsi nfs-common
 sudo systemctl enable --now iscsid
-sudo systemctl enable --now kubelet || true
+sudo systemctl enable kubelet || true
+
+sudo swapoff -a || true
+sudo awk '
+  /^[[:space:]]*#/ { print; next }
+  $3 == "swap" { print "# kubeadm-disabled " $0; next }
+  { print }
+' /etc/fstab | sudo tee /etc/fstab.kubeadm >/dev/null
+sudo mv /etc/fstab.kubeadm /etc/fstab
+
+sudo tee /etc/modules-load.d/k8s.conf >/dev/null <<'MODULES_EOT'
+overlay
+br_netfilter
+MODULES_EOT
+sudo modprobe overlay || true
+sudo modprobe br_netfilter || true
+
+sudo tee /etc/sysctl.d/99-kubernetes-cri.conf >/dev/null <<'SYSCTL_EOT'
+net.bridge.bridge-nf-call-iptables = 1
+net.bridge.bridge-nf-call-ip6tables = 1
+net.ipv4.ip_forward = 1
+SYSCTL_EOT
+sudo sysctl -w net.ipv4.ip_forward=1 >/dev/null
+if [ -e /proc/sys/net/bridge/bridge-nf-call-iptables ]; then
+  sudo sysctl -w net.bridge.bridge-nf-call-iptables=1 >/dev/null
+  sudo sysctl -w net.bridge.bridge-nf-call-ip6tables=1 >/dev/null
+fi
+
+if ! getent hosts "${self.triggers.node_name}" >/dev/null; then
+  printf '%s %s\n' "${self.triggers.advertise_address}" "${self.triggers.node_name}" | sudo tee -a /etc/hosts >/dev/null
+fi
 
 sudo mkdir -p /etc/containerd
 if [ ! -f /etc/containerd/config.toml ]; then
@@ -55,11 +85,22 @@ for path in "$${pv_dirs[@]}"; do
   sudo chmod 0775 "$path"
 done
 
+if [ ! -f /etc/kubernetes/admin.conf ] && [ -d /etc/kubernetes ]; then
+  sudo kubeadm reset --force || true
+  sudo systemctl stop kubelet 2>/dev/null || true
+  sudo rm -rf /etc/kubernetes/ /var/lib/etcd/ /var/lib/kubelet/ /var/lib/cni/ /etc/cni/net.d
+fi
+
 if [ ! -f /etc/kubernetes/admin.conf ]; then
-  sudo kubeadm init \
+  sudo systemctl stop kubelet 2>/dev/null || true
+  if ! sudo kubeadm init \
     --pod-network-cidr=${self.triggers.pod_network_cidr} \
     --node-name=${self.triggers.node_name} \
-    --apiserver-advertise-address=${self.triggers.advertise_address}
+    --apiserver-advertise-address=${self.triggers.advertise_address}; then
+    sudo systemctl status kubelet --no-pager -l || true
+    sudo journalctl -u kubelet --no-pager -n 160 || true
+    exit 1
+  fi
 fi
 
 mkdir -p "$(dirname "${self.triggers.kubeconfig_path}")"
@@ -111,9 +152,39 @@ resource "null_resource" "kubeadm_worker" {
 set -eu
 
 sudo apt-get update
-sudo apt-get install -y open-iscsi nfs-common
+sudo apt-get install -y curl open-iscsi nfs-common
 sudo systemctl enable --now iscsid
-sudo systemctl enable --now kubelet || true
+sudo systemctl enable kubelet || true
+
+sudo swapoff -a || true
+sudo awk '
+  /^[[:space:]]*#/ { print; next }
+  $3 == "swap" { print "# kubeadm-disabled " $0; next }
+  { print }
+' /etc/fstab | sudo tee /etc/fstab.kubeadm >/dev/null
+sudo mv /etc/fstab.kubeadm /etc/fstab
+
+sudo tee /etc/modules-load.d/k8s.conf >/dev/null <<'MODULES_EOT'
+overlay
+br_netfilter
+MODULES_EOT
+sudo modprobe overlay || true
+sudo modprobe br_netfilter || true
+
+sudo tee /etc/sysctl.d/99-kubernetes-cri.conf >/dev/null <<'SYSCTL_EOT'
+net.bridge.bridge-nf-call-iptables = 1
+net.bridge.bridge-nf-call-ip6tables = 1
+net.ipv4.ip_forward = 1
+SYSCTL_EOT
+sudo sysctl -w net.ipv4.ip_forward=1 >/dev/null
+if [ -e /proc/sys/net/bridge/bridge-nf-call-iptables ]; then
+  sudo sysctl -w net.bridge.bridge-nf-call-iptables=1 >/dev/null
+  sudo sysctl -w net.bridge.bridge-nf-call-ip6tables=1 >/dev/null
+fi
+
+if ! getent hosts "${self.triggers.node_name}" >/dev/null; then
+  printf '%s %s\n' "${self.triggers.host}" "${self.triggers.node_name}" | sudo tee -a /etc/hosts >/dev/null
+fi
 
 sudo mkdir -p /etc/containerd
 if [ ! -f /etc/containerd/config.toml ]; then
@@ -138,8 +209,25 @@ for path in $pv_dirs; do
   sudo chmod 0775 "$path"
 done
 
+if [ -f /etc/kubernetes/kubelet.conf ] && ! curl -fsS --max-time 5 http://127.0.0.1:10248/healthz >/dev/null 2>&1; then
+  sudo kubeadm reset --force || true
+  sudo systemctl stop kubelet 2>/dev/null || true
+  sudo rm -rf /etc/kubernetes/ /var/lib/kubelet/ /var/lib/cni/ /etc/cni/net.d
+fi
+
+if [ ! -f /etc/kubernetes/kubelet.conf ] && [ -e /var/lib/kubelet/kubeadm-flags.env ]; then
+  sudo kubeadm reset --force || true
+  sudo systemctl stop kubelet 2>/dev/null || true
+  sudo rm -rf /etc/kubernetes/ /var/lib/kubelet/ /var/lib/cni/ /etc/cni/net.d
+fi
+
 if [ ! -f /etc/kubernetes/kubelet.conf ]; then
-  sudo ${data.external.kubeadm_join_command.result.cmd} --node-name=${self.triggers.node_name}
+  sudo systemctl stop kubelet 2>/dev/null || true
+  if ! sudo ${data.external.kubeadm_join_command.result.cmd} --node-name=${self.triggers.node_name}; then
+    sudo systemctl status kubelet --no-pager -l || true
+    sudo journalctl -u kubelet --no-pager -n 160 || true
+    exit 1
+  fi
 fi
 EOT
     ]