Create k0s-install.sh

setup/k0s-install.sh

@@ -0,0 +1,133 @@
+#!/usr/bin/env bash
+if [ "$VERBOSE" == "yes" ]; then set -x; fi
+YW=$(echo "\033[33m")
+RD=$(echo "\033[01;31m")
+BL=$(echo "\033[36m")
+GN=$(echo "\033[1;92m")
+CL=$(echo "\033[m")
+RETRY_NUM=10
+RETRY_EVERY=3
+NUM=$RETRY_NUM
+CM="${GN}✓${CL}"
+CROSS="${RD}✗${CL}"
+BFR="\\r\\033[K"
+HOLD="-"
+set -o errexit
+set -o errtrace
+set -o nounset
+set -o pipefail
+shopt -s expand_aliases
+alias die='EXIT=$? LINE=$LINENO error_exit'
+trap die ERR
+
+function error_exit() {
+  trap - ERR
+  local reason="Unknown failure occurred."
+  local msg="${1:-$reason}"
+  local flag="${RD}‼ ERROR ${CL}$EXIT@$LINE"
+  echo -e "$flag $msg" 1>&2
+  exit $EXIT
+}
+
+function msg_info() {
+  local msg="$1"
+  echo -ne " ${HOLD} ${YW}${msg}..."
+}
+
+function msg_ok() {
+  local msg="$1"
+  echo -e "${BFR} ${CM} ${GN}${msg}${CL}"
+}
+function msg_error() {
+  local msg="$1"
+  echo -e "${BFR} ${CROSS} ${RD}${msg}${CL}"
+}
+
+msg_info "Setting up Container OS"
+sed -i "/$LANG/ s/\(^# \)//" /etc/locale.gen
+locale-gen >/dev/null
+while [ "$(hostname -I)" = "" ]; do
+  echo 1>&2 -en "${CROSS}${RD} No Network! "
+  sleep $RETRY_EVERY
+  ((NUM--))
+  if [ $NUM -eq 0 ]; then
+    echo 1>&2 -e "${CROSS}${RD} No Network After $RETRY_NUM Tries${CL}"
+    exit 1
+  fi
+done
+msg_ok "Set up Container OS"
+msg_ok "Network Connected: ${BL}$(hostname -I)"
+
+set +e
+alias die=''
+if nc -zw1 8.8.8.8 443; then msg_ok "Internet Connected"; else
+  msg_error "Internet NOT Connected"
+    read -r -p "Would you like to continue anyway? <y/N> " prompt
+    if [[ $prompt == "y" || $prompt == "Y" || $prompt == "yes" || $prompt == "Yes" ]]; then
+      echo -e " ⚠️  ${RD}Expect Issues Without Internet${CL}"
+    else
+      echo -e " 🖧  Check Network Settings"
+      exit 1
+    fi
+fi
+RESOLVEDIP=$(nslookup "github.com" | awk -F':' '/^Address: / { matched = 1 } matched { print $2}' | xargs)
+if [[ -z "$RESOLVEDIP" ]]; then msg_error "DNS Lookup Failure"; else msg_ok "DNS Resolved github.com to $RESOLVEDIP"; fi
+alias die='EXIT=$? LINE=$LINENO error_exit'
+set -e
+
+msg_info "Updating Container OS"
+apt-get update &>/dev/null
+apt-get -y upgrade &>/dev/null
+msg_ok "Updated Container OS"
+
+msg_info "Installing Dependencies"
+apt-get install -y curl &>/dev/null
+apt-get install -y sudo &>/dev/null
+apt-get install -y git &>/dev/null
+msg_ok "Installed Dependencies"
+
+msg_info "Installing k0s Kubernetes"
+sh <(curl -sSLf https://get.k0s.sh) &>/dev/null
+k0s install controller --single &>/dev/null
+k0s start &>/dev/null
+mkdir -p /etc/k0s
+k0s config create > /etc/k0s/k0s.yaml
+msg_ok "Installed k0s Kubernetes"
+
+read -r -p "Would you like to add Helm Package Manager? <y/N> " prompt
+if [[ $prompt == "y" || $prompt == "Y" || $prompt == "yes" || $prompt == "Yes" ]]; then
+  HELM="Y"
+else
+  HELM="N"
+fi
+
+if [[ $HELM == "Y" ]]; then
+msg_info "Installing Helm"
+curl -sSL https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash &>/dev/null
+msg_ok "Installed Helm"
+fi
+PASS=$(grep -w "root" /etc/shadow | cut -b6)
+if [[ $PASS != $ ]]; then
+  msg_info "Customizing Container"
+  chmod -x /etc/update-motd.d/*
+  touch ~/.hushlogin
+  GETTY_OVERRIDE="/etc/systemd/system/container-getty@1.service.d/override.conf"
+  mkdir -p $(dirname $GETTY_OVERRIDE)
+  cat <<EOF >$GETTY_OVERRIDE
+[Service]
+ExecStart=
+ExecStart=-/sbin/agetty --autologin root --noclear --keep-baud tty%I 115200,38400,9600 \$TERM
+EOF
+  systemctl daemon-reload
+  systemctl restart $(basename $(dirname $GETTY_OVERRIDE) | sed 's/\.d//')
+  msg_ok "Customized Container"
+fi
+if [[ "${SSH_ROOT}" == "yes" ]]; then
+  sed -i "s/#PermitRootLogin prohibit-password/PermitRootLogin yes/g" /etc/ssh/sshd_config
+  systemctl restart sshd
+fi
+
+msg_info "Cleaning up"
+apt-get autoremove >/dev/null
+apt-get autoclean >/dev/null
+msg_ok "Cleaned"